MJ-4A Manual (2MB)

MJ-4A(TM) and MJ-4B(TM) Voltage Regulator
Control Panel
Installation and Operations Manual
Quick
Alert
High Band
Reverse Power Flow
In Band
Raise/ Lower
Low Band
Cancel
Reset
Remote Auto Inhibit
Tap Control Status
Max
Min
Save
Change
Remote Disabled
Alert
Menu
Op
Count
Maintenance
Accu/Stat MJ – 4A
Data Port
Line Drop Compensation
Regulation Setting
Band width
Voltage
Level
Time
Delay
Resis tance
Voltage Reduction Control
VLC
Neutralite
Drag Hands
Test
Reset
Tap Control
Power
Normal
Auto
Raise
Off
(By pass
Position)
External
Ground 120 VAC
Reac tance
Voltage Limit Control
VRC
Off
+/-
Off
( By pass
Position )
Manual
Remote
/
Local
External
Sensing
Power
0.75A
6.0A
6.0A
(By pass
Position)
Lower
U2
P2
Load Voltage
(unscaled)
Ground Voltage
Fuses
Manual No. 21-115-527-023 rev02
Siemens Energy, Inc.
DANGER
Hazardous voltage and high-speed moving parts.
Will cause death, serious personal injury, or equipment damage.
Always de-energize and ground equipment before maintenance.
Read and understand this instruction manual before using
equipment. Maintenance should be performed only by qualified
personnel. The use of unauthorized parts in the repair of the
equipment or tampering by unqualified personnel will result in
dangerous conditions. Follow all safety instructions contained
herein.
IMPORTANT
The information contained herein is general in nature and not intended for specific
application purposes. It does not relieve the user of responsibility to use sound practices in application, installation, operation, and maintenance of the equipment purchased. Siemens reserves the right to make changes at any time without notice of
obligations. Should a conflict arise between the general information contained in this
publication and the contents of drawings or supplementary material, or both, the latter
shall take precedence.
QUALIFIED PERSON
For the purposes of this manual, a qualified person is one who is familiar with the
installation, construction, or operation of the equipment and the hazards involved. In
addition, this person has the following qualifications:
(a)
is trained and authorized to de-energize, clear, ground, and tag circuits and
equipment in accordance with established safety practices.
(b)
is trained in the proper care and use of protective equipment such as rubber
gloves, hard hat, safety glasses or face shields, flash clothing, etc., in accordance with established safety procedures.
(c)
is trained in rendering first aid.
NOTE
These instructions do not purport to cover all details or variations in equipment, not to
provide for every possible contingency to be met in connection with installation, operation, or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter
should be referred to the local sales office.
The contents of the instruction manual shall not become part of or modify any prior or
existing agreement, commitment or relationship. The sales contract contains the entire
obligation of Siemens Power Transmission & Distribution, Inc. The warranty contained
in the contract between parties is the sole warranty of Siemens Power Transmission &
Distribution, Inc. Any statements contained herein do not create new warranties or
modify the existing warranty.
DANGER
WARNING
CAUTION
Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
1 Introduction........................................ 1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
About This Manual ............................... 1
Features of the MJ-4A & MJ-4B Control
Panels .................................................... 1
Mounting on Siemens Regulators ...... 2
Mounting on Cooper Regulators......... 2
Mounting on GE Regulators ................ 2
Mounting onto LTCs ............................. 2
Support Documentation ...................... 2
Siemens Website.................................. 2
Control Panel Type................................ 2
2 Using the MJ-4A & MJ-4B Operator
Panel and Controls ............................ 3
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Introduction to the Front Panel............ 5
Sixteen-Character Display Screen ...... 5
Data Display .......................................... 5
Indicators .............................................. 8
Switches ...............................................10
Binding Posts .......................................11
Fuses.....................................................11
Terminal Strip Connections ............... 12
Local Data Port.................................... 14
3 Viewing and Changing MJ-4A & . .
MJ-4B Data Items ............................ 15
3.1
3.2
3.3
3.4
3.5
Viewing Data Items ............................ 15
Understanding Menus ....................... 15
Using the Menu Selection Keys to View
Data Items ........................................... 15
Changing Data Items.......................... 16
Using the Fast-Path Keys to View/
Change Data Items ............................. 17
4 Setting Up the MJ-4A & MJ-4B
Control Panel.................................... 18
4.1
4.2
4.3
Setup—Overview................................ 18
Setup for Retrofit Panels .....................19
Defining Your Regulator—
the <CONFIGURE> and <ADV
CONFIGURE> Menus...........................19
4.4 Setting Control Levels—
the <REGULATOR> Menu................... 28
4.5 Activating Data Logging—
the <LOG SETUP> Menu .................... 31
4.6 Password Security Protection—
the <PASSWORD> Menu.................... 32
4.7 Communications Definition—
the <COMMUNICATIONS> Menu...... 35
4.8 Regulator Maintenance—
the <MAINTENANCE> Menu ............. 37
4.9 Hardware Configuration—
the <DIAGNOSTICS> Menu ............... 37
4.10 Setting up the Quick Key.................... 38
5 Reading and Interpreting MJ-4A &
MJ-4B Control Panel Data ...............39
5.1
5.2
5.3
5.4
Source and Load Definitions ............. 39
P2 Voltage Calculation........................ 39
Meter Data—the <METER> Menu...... 39
Demand Data—
the <DEMAND> Menus ...................... 41
5.5 Event Log - the <EVENT LOG> Menu 41
5.6 Interval Log — the <INTERVAL LOG>
Menu .................................................... 42
5.7 Operation Counter Data the <COUNTERS> Menu..................... 43
5.8 Alerts—the <Alert> Menu................... 44
5.9 Harmonics Data—
the <HARMONICS> Menu .................. 45
5.10 Local Data Port—
the <COMMUNICATIONS> Menu ...... 45
5.11 VRC Status - the <REGULATOR> Menu .
.............................................................. 45
6 MJ-4A & MJ-4B Control Panel
Automatic Mode...............................46
6.1
6.2
6.3
6.4
6.5
MJ-4A & MJ-4B Control Modes......... 46
Overview of Automatic Control
Algorithm ............................................ 47
Voltage Sensing and Correction ........ 48
Voltage Limit Control.......................... 48
Reverse Power Flow ........................... 48
7 Software for Communicating with the
MJ-4A & MJ-4B Control Panel ........54
7.1
7.2
Communications Software ................ 54
Uploading New MJ-4A & MJ-4B
Software .............................................. 54
8 MJ-4A & MJ-4B Control Panel Basic
Troubleshooting ...............................55
8.1
8.2
8.3
8.4
8.5
8.6
8.7
Introduction......................................... 55
Visual Inspection................................. 55
Troubleshooting Based on Alert
Messages ............................................ 56
Voltage and Current Calibration ........ 56
MJ-4A & MJ-4B Self Testing .............. 57
Communications Module
Troubleshooting.................................. 57
Tap Tracking ........................................ 57
A Specifications ...................................58
B Physical Installation on Siemens
Regulators.........................................59
C Regulator Control Diagrams............61
D Menu Parameters .............................63
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D.1
D.2
D.3
<CONFIGURE> Menu:
Leading and Lagging Regulators....... 63
<REGULATOR> Menu:
Line Drop Compensation ................... 63
<CONFIGURE> Menu:
Transformer Polarity ........................... 65
E Hazards of Bypassing a Regulator off
Neutral ..............................................69
F Communications Module Installation.
. ..........................................................70
G Menu Structure Quick Reference....72
H MJ-4A & MJ-4B Firmware Versions....
.. ......................................................... 74
I
Terminal Strip Wiring.......................75
J MJ-4A & MJ-4B Jumpers and Battery
Replacement..................................... 76
J.1
J.2
MJ-4A & MJ-4B Jumpers ................... 76
Battery Replacement........................... 77
K Terminal Strip Connections.............78
L MJ-4A & MJ-4B Operating
Procedures........................................81
1 Introduction
1 Introduction
The MJ-4A(TM) and MJ-4B(TM), here after referred to collectively as MJ-4(TM) is a Voltage Regulator Control Panel,
which is a members of the Siemens Accu/Stat® series of
digital controls, designed for use with many regulators and
load tap changer models.
Note: This manual describes features embodied in
MJ-4 software version 4.10
Although the MJ-4 Control Panel includes some new functions, its operational characteristics are similar to those of
earlier-model Accu/Stat MJ-1A, 2A, 3, 3A, MJ-X, and MJXL controls. It is electrically and mechanically interchangeable with these controls.
This section briefly describes the standard MJ-4 Control
Panel features and functions.
Voltage Reduction Control, Voltage Limit Control, six
Power Flow modes, and Data Logging are all standard features of the MJ-4 Control Panel.
In addition to manual and automatic voltage monitoring
and control, the MJ-4 Control Panel also offers full remote
monitoring and control capability. Via a communications
link, a remote operator can monitor operating conditions
and adjust setpoints or command tap changes—just as if
he/she were locally operating the controls.
When equipped with an optional Communications Module, the MJ-4 Control Panel provides remote communications and SCADA (Supervisory Control And Data
Acquisition) compatibility. Please refer to the MJ-4 Communications Module Installation Manual for an in-depth
treatment of the Communications Module.
The regulator control function has two operating modes—
manual and automatic. Remote control can be enabled or
disabled for each of these operating modes. The operating
modes and remote control settings are described in Section 2.5.
•
Manual control. In Manual mode, the operator
directly controls the regulator tap changer and uses
this mode to enter regulator setpoints for automatic
control.
•
Automatic control. In Automatic mode, the microprocessor controls the regulator tap changer, based
on setpoints stored in memory.
•
Remote control. If enabled, this setting permits a
remote operator to change operational values and
setpoints as well as to monitor operational values. If
disabled, a remote operator can only monitor operational values.
1.1
About This Manual
This manual is designed to help you become acquainted
with all aspects of the MJ-4 Control Panel. The manual
starts with the operator panel and controls, followed by
physical installation considerations, setup procedures,
day-to-day operations, and finally, troubleshooting. The
Appendices provide further information about MJ-4 Control Panel operation and setup.
Siemens Energy, Inc.
1.2
Features of the MJ-4A & MJ-4B
Control Panels
Display Panel and Operator Controls
Operator input to the MJ-4 Control Panel is accomplished
through a set of touch-keys. MJ-4 output is presented in
plain text through a sixteen-character alphanumeric display panel. For status items, such as Voltage Reduction
and Voltage Limit, indicators provide a quick-glance summary of MJ-4 Control Panel operating conditions.
Metering
The MJ-4 Control Panel maintains and presents operational data to help you monitor system operation. Instantaneous and demand values (along with minimum and
maximum for each) are readily available.
Data Logging
The Data Logging function maintains historical data for
subsequent review and analysis. This data can be very
useful in the assessment of load characteristics by time of
day or season; the reconstruction of system problems;
and the improvement of the overall efficiency of the power
distribution system.
Voltage Limit Control
Voltage Limit Control (VLC) automatically maintains regulator output voltage within preset high and low limits.
Line Drop Compensation
Line Drop Compensation (LDC) models the resistive and
reactive voltage drop of the line. The resulting model is
used by the microprocessor to correct regulator output
voltage for the effects of line drop between the regulator
and the load.
Voltage Reduction Control
Voltage Reduction Control (VRC) reduces output voltage
and can be activated automatically, manually, or remotely.
Reverse Power Flow Detection and Operation
In many systems, power only flows in one direction; however, in some systems power flow reverses from time to
time. To accommodate power flow reversal, the MJ-4
Control Panel monitors power flow direction and adjusts
its operation accordingly. Six different Power Flow Modes
allow flexibility in selecting a control algorithm which best
matches the power flow needs of the system.
1
1 Introduction
Communications
1.7
The MJ-4 panel provide local communications via the
front-panel data port, and supports remote communications with the MJ-4 Communications Module.
In addition to this manual, Siemens provides a number of
supporting documents that provide details about the use
of Siemens regulators and control products.
Barrier Terminal Strips
Contact your Siemens representative or visit the Siemens
T&D website for a complete list of Application Notes and
other supporting documentation.
Terminal contacts on the back of the MJ-4 Control Panel
allow for external control over certain functions such as
VRC activation and tap changing. These terminals can be
used to provide an electrical interface to a SCADA system
for remote control applications and/or other desired control functions.
1.3
Mounting on Siemens Regulators
The MJ-4 Control Panels are mechanically and electrically
compatible and interchangeable with earlier MJ, IJ and SJ
series and earlier control units. They can be mounted in
the existing enclosure by simply swinging the control to
be replaced outward on its hinges, disconnecting the
polarized disconnect switch (PDS), then removing the unit
and inserting the new unit. (See Appendix B.)
1.4
Mounting on Cooper Regulators
A retrofit kit is available for mounting the MJ-4 Control
Panels on Cooper regulators. The kit includes all of the
necessary hardware and complete instructions for mounting and connecting the MJ-4 to the regulator. The retrofit
is accomplished without the necessity of replacing the
waterproof housing. See the Retrofitting Cooper Regulators Application Note for details.
Contact your Siemens representative for ordering information.
1.5
Mounting on GE Regulators
1.8
Support Documentation
Siemens Website
The Siemens website contains information about all of the
Siemens transmission and distribution products, including
regulators and controls.
All voltage regulator products can be located on the Voltage Regulator product page after navigating to the Siemens PT&D website below:
http://www.usa.siemens.com/energy
Browse this section for information about the regulators,
regulator accessories, upgrades, downloadable files, and
more.
1.9
Control Panel Type
There are two models of Voltage Regulator control panels
described in this manual: the MJ-4A and the MJ-4B.
The MJ-4A has discrete three position switches for the
Auto-Manual functionality and Raise/Lower. The MJ-4B
has push buttons for the above functionalities.
This manual is written describing the features of the control panel in general and in specific sections the differences between the MJ-4A and MJ-4B are explained.
A retrofit kit is available for mounting the MJ-4 Control
Panel on GE regulators. The kit includes all of the necessary hardware and complete instructions for mounting and
connecting the MJ-4 to the regulator. The retrofit is
accomplished without the necessity of replacing the
waterproof housing. See the Retrofitting GE. Regulators
Application Note for details.
Contact your Siemens representative for ordering information.
1.6
Mounting on Load Tap Changers
A retrofit kit is available for mounting the MJ-4 Control
Panels on LTCs. The kit includes all of the necessary hardware and complete instructions for mounting and connecting the MJ-4 to the LTC.
Contact your Siemens representative for ordering information.
2
Siemens Energy, Inc.
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
Quick Key
Quick
Indicators
16 Character
Display
Change Keys
Alert
High Band
Remote Disabled
Reverse Power Flow
In Band
Remote Auto Inhibit
Raise/Lower
Low Band
Menu Selection
Scroll Keys
Tap Control Status
Menu
Alert Status
Fast Path Key
Cancel
Reset
Change
Max
Min
Save
Alert
Op
Count
Maintenance
Accu/Stat MJ – 4A
Data Port
Data Port
Regulator
Fast Path Keys
Bandwidth
VRC Active
Indicator
Line Drop Compensation
Regulation Setting
Voltage
Level
Time
Delay
Resistance
Voltage Reduction Control
VLC
Neutralite
Neutrallite
Indicator
Drag Hands
Test
Neutralite
Test Key
Reset
Power
Normal
Auto
Off
(By pass
Position)
(By pass
Position)
External
Tap Control
Remote
/
Local
Ground 120 VAC
6.0A
0.75A
Fuses
Remote/Auto
Manual Switch
(By pass
Position)
Lower
Manual
External Sensing
External Power
Binding Posts
Line Drop
Compensation
Fast-Path Keys
U2
P2
Load Voltage
(unscaled)
VLC Indicator
Drag Hands
Reset
U2 P2 Key
Raise Lower
Switch
Voltage Calibration
Binding Posts
Power
6.0A
VLC Select
Fast-Path Key
Remote / Local
button
Raise
Off
Off
Power Switch
Reactance
Maintenance
Fast Path Key
Voltage Limit Control
VRC
VRC Select
Fast Path Key
+/-
Op Counter
Fast Path Key
Ground Voltage
Power Fuse
Sensing Fuse
External Power
Fuse
Figure 2.1
MJ-4A Front Panel
Siemens Energy, Inc.
3
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
Quick Key
Quick
Indicators
16 Character
Display
Change Keys
Alert
High Band
Remote Disabled
Reverse Power Flow
In Band
Remote Auto Inhibit
Raise/Lower
Low Band
Tap Control Status
Regulator
Fast Path Keys
Cancel
Reset
Change
Max
Min
Save
Alert
Maintenance
Accu/ Stat MJ – 4B
Line Drop Compensation
Regulation Setting
Voltage
Level
Time
Delay
Resistance
Voltage Reduction Control
VRC Select
Fast Path Key
+/-
Reactance
Op Counter
Fast Path Key
Maintenance
Fast Path Key
Line Drop
Compensation
Fast-Path Keys
Voltage Limit Control
VLC
VRC
Neutralite
Neutrallite
Indicator
Neutralite
Test Key
Op
Count
Data Port
Bandwidth
VRC Active
Indicator
Menu
Alert Status
Fast Path Key
SIEMENS
Data Port
Menu Selection
Scroll Keys
Drag Hands
Test
Reset
VLC Select
Fast-Path Key
VLC Indicator
Drag Hands
Reset
Tap Control
Remote / Local
button
Power Switch
Auto /
Manual button
Power
Normal
Remote
/
Local
Raise
Raise
Off
(By pass
Position)
Auto
/
Manual
External
Lower
External Sensing
U2
P2
Load Voltage
(unscaled)
Power
External Power
Fuse
6.0A
0.75A
Fuses
6.0A
Lower
Voltage Calibration
Binding Posts
External Power
Binding Posts
Ground 120 VAC
U2 P2 Key
Ground Voltage
Power Fuse
Sensing Fuse
Figure 2.2
4
MJ-4B Front Panel
Siemens Energy, Inc.
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
2.1
Introduction to the Front Panel
The Front Panel (Figure 2.1and 2.2) provides access to all
controller information. Configuration settings, setpoint
adjustments, and data requests are entered through a set
of large touch-keys. Front panel output devices include a
number of indicator lights (LEDs) and a sixteen-character
alphanumeric display screen.
The front panel is logically divided into three areas from
top to bottom:
The top third of the front panel contains various indicator
lights, an RS-232 serial port for local data communication,
and a sixteen-character display screen. Also included in
this area are touch-keys for the selection and modification
of setpoints and data. The keys to the right of the display
screen select specific readings or settings; the keys below
the display screen can be used to change the selected
value. This section also contains the Quick, Op Count, and
Messages fast-path keys.
The middle third of the front panel includes a group of
special fast-path keys that provide direct access to frequently-used functions (Regulation Setting, Line Drop
Compensation, Voltage Reduction Control, Voltage Limit
Control, Neutralite Test, and Drag Hands Reset).
In the bottom third, the MJ-4A Panel has mode and raise
lower switches, whereas the MJ-4B panel has mode push
buttons for the same, both panels have a power switch,
binding posts for the attachment of external power and
metering equipment, and controller fuses.
2.3.1
Menu Selection and Change Keys
Use the Menu Selection and Change keys, located in the
top third of the front panel, to view and change controller
setpoints and data items.
To view a specific data item, you must first select the
Menu that contains that item. For example, meter readings are selected from the <METER> Menu; setpoints are
selected from the <REGULATOR> Menu. Once the correct Menu is selected use the Scroll keys to step through
the data items in that Menu until the desired data item is
viewed on the display screen. (For details about the
Menus, see Chapter 3 and Appendix G.)
Menu Key
Menu
Press this key once to return to the top of the current
Menu. To return to the start of all Menus from any position
in any Menu press this key twice.
Scroll Keys
This chapter describes each of the front panel controls and
explains how you can use them to select, view, and
change stored data. For more detailed information about
the functions provided by these controls, read chapters 4
and 5.
2.2
Sixteen-Character Display Screen
The microprocessor presents information to the operator
by way of a sixteen-character alphanumeric display
screen. This display screen presents both alphabetic and
numeric characters in plain text, eliminating the need for
special codes. The display screen uses high contrast,
active LED technology that is easy-to-read in direct sunlight as well as in low light conditions.
2.3
Data Display
Front panel touch-keys provide easy access to all data
stored in MJ-4 Control Panel memory.
To view or change a given data item you must first display
it. Two types of touch-keys are provided to help you display a data item:
•
Use the menu selection keys to view any stored data
item grouped by Menu Headings.
•
Use the fast-path keys to jump directly to frequentlyused data items without scrolling.
Siemens Energy, Inc.
These triangular keys surround the Menu key. Their shape
indicates the direction of scrolling performed by the key.
Use the right and left Scroll keys to scroll across Menu
headings and move the cursor when in Change mode.
Use the up and down Scroll keys to scroll through data
items within a column and change settings when in
Change mode.
Change Key
C hange
Use this key to place the panel in the Change mode. In
Change mode, you can make changes to setpoints and
other stored configuration information.
5
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
To change an item:
1.
View the item using either the menu selection keys or
the fast-path keys.
2.
Press the Change key. The displayed data item
flashes to indicate that it can be changed.
3.
Use the Scroll keys to make the desired change.
Save Key
S a ve
After using the Change key and the Scroll keys to modify a
data item, press the Save key to record the change and
exit the Change mode. The displayed data item will stop
flashing.
Special Use: While viewing any max/min screen, press
Save to view the Time/Date stamp for the max/min item.
Cancel/Reset Key
C a n ce l
R e se t
The function of this key depends upon the function currently being performed:
•
If the microprocessor is in Change mode, press the
Cancel/Reset key to exit the Change mode and cancel
any changes. (The data item will revert to its previous
setting.)
•
If you are viewing a max or min value, press the Cancel/Reset key to reset the item to the present meter
value.
•
If you are viewing Tapmax/Tapmin data items, press
the Cancel/Reset key to reset them to the current tap
position. (See Section 5.7, <COUNTERS> Menu.)
•
If you are viewing an ALERT, press the Cancel/Reset
key to acknowledge the Alert. (SeeSection 5.8,
<ALERTS> Menu.)
Max/Min Key
M ax
M in
Use this key to view max/min values for meter parameters. First view the desired data item, then press the Max/
Min key to view the maximum value. Press the Max/Min
key again to see the minimum value, Press the Max/Min
key a third time to exit the Max/Min mode without resetting the values.
6
Max/Min data items are displayed for a short period of
time, after which the display returns to the current value.
The length of this period can be selected by the operator.
(See Section 4.3.24, Min/Max Time Out.)
For example, if you wish to see the minimum load voltage
since the last reset, use the Menu Selection keys to select
Vld from the Meter Menu. The current voltage value is displayed on the screen. Press the Max/Min key. The maximum value will display for a short time. Press the Max/
Min key again to view the minimum value.
To clear max/min values, see Cancel/Reset Key description.
To display max/min Time/Date stamp, see the Save key
Special Use description.
2.3.2
Fast-Path Keys
Fast-path keys are shortcuts that provide direct access to
frequently used data items. Once you have selected a
data item with a fast-path key, use the Change, Scroll, and
Save keys to view and change the data item just as you
would do with the menu selection keys.
Many of the data items selected by the fast-path keys
have both forward and reverse values. For example, if you
press the fast-path key labeled “Voltage Level”, the data
item “Fwd Volts” appears on the display screen. Press
the key again to view the reverse value. “Rev Volts” is displayed. Press the key repeatedly to alternate the display
between forward and reverse values.
Regulation Setting Fast-Path Keys:
Voltage Level Key
V o lta g e
L e ve l
The Voltage Level setpoint defines the output voltage you
want the regulator to maintain. Use this key to view the
Voltage Level setpoint. Once you display the Voltage
Level, press the Change key to modify the value.
Bandwidth Key
B and w id th
The Bandwidth setpoint defines a voltage range (on either
side of the Voltage Level setpoint) which you consider to
be acceptable. When regulator output voltage falls outside
this value, the MJ-4 Control Panel activates the tap
changer motor to restore the voltage to an in-band condition. Use this key to view the Bandwidth setpoint. Once
you display the Bandwidth, press the Change key to modify the value.
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2 Using the MJ-4A & MJ-4B Operator Panel and Controls
Time Delay Key
T im e
D e la y
The Time Delay setpoint defines the amount of time you
want the controller to wait (after regulator output voltage
has fallen outside the Bandwidth limit) before activating
the tap changer motor. Use this key to view the Time
Delay setpoint. Once you display the Time Delay, press
the Change key to modify the value.
Line Drop Compensation Fast-Path Keys
Line Drop Compensation (LDC) defines your estimate of
the voltage drop between the regulator and the load center. The MJ-4 control program adjusts regulator output
voltage to compensate for this drop. Specify both Resistive and Reactive components of Line Drop Compensation. See Appendix D.2 for instructions about calculating
the line drops.
Resistance Key
Press this key to view the contents of the <ALERTS>
Menu. If any Alert messages are active, press this key
repeatedly to step through them in order of priority. If no
Alerts are active, the message “No Active Alerts” will be
displayed. Section 5.8 contains additional information on
how to determine the meaning of the various Alerts, and
how to acknowledge them.
Press the Cancel/Reset Key to acknowledge the messages.
Voltage Reduction Control (VRC) Key
VRC
S e le ct
Press this key to view the Voltage Reduction Control data
items. The first data item in that function is VRC status.
Press this key repeatedly to step through the VRC settings
(Local % reduction, Stage 1-3, VRC Remote, etc.) and
then return to VRC Mode and repeat the sequence. See
Section 4.4.3 for a discussion of these data items.
Voltage Limit Control (VLC) Key
R e sista n c e
VLC
S e le c t
Press this key to view the Resistive LDC component.
Once you display the Resistive LDC, press the Change
key to modify the value.
Reactance Key
R eacta n c e
Press this key to view the Reactive LDC component. Once
you display the Reactive LDC, press the Change key to
modify the value.
+/- Polarity Select Key
+ /-
Press this key to view the VLC Enable data items. Press
the VLC key repeatedly to step through the VLC - Upper
Voltage setpoint, and the VLC - Lower Voltage setpoint
and then repeat the sequence. See Section 4.4.4 for a discussion of these data items.
Operation Counter (Op Count) Key
Op
C ount
Press this key to select the <COUNTERS> Menu. The
first parameter displayed is the Total Operations count.
Press this key repeatedly to step through the
<COUNTERS> Menu data items. See Section 5.7 for a
discussion of this Menu.
Maintenance Key
While in the Change mode, press this key to define the
polarity of either the Resistive or Reactive LDC component.
M a in te nance
Other Fast-Path Keys
Alert Key
A le rt
Siemens Energy, Inc.
Press this key to view the Overall Contact status screen
from the <MAINTENANCE> menu. Press the key repeatedly to scroll through the contact status screens and the
settings for the maintenance algorithm.
7
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
U2 P2 Key
U2
P2
Press this key to enable or disable automatic tap changes
of the regulator. The Auto Disabled LED indicates whether
or not automatic tap operations will occur.
Raise and Lower Keys
Press this key to toggle between the U2 and P2 voltages
when the setting under <ADV CONFIGURE> menu U2/
P2 out is set to Toggle.
Neutralite Test Key
Test
R a is e
Low er
The Raise and Lower keys are present in the MJ-4B Panel.
The MJ-4A panel has discrete switch for the same functionality.
Press this key to illuminate the Neutralite Indicator. This is
an LED test.
While Automatic tap operations are disabled, the Raise
and Lower keys are active. Press and Hold the Raise key
to increase the tap position. Press and Hold the Lower key
to decrease the tap position.
Drag Hands Reset Key
2.4
R e se t
Indicators
The front panel also provides user information via individual status indicators. These indicators provide a direct
means of assessing operational status.
Alert LED
Press this key to reset the electromechanical drag hands
on the Position Indicator to the present tap changer position. This also resets the electronically stored max/min tap
position values (viewable from the display).
Quick Key
Q u ic k
Press this key to view the items stored in the Quick List.
The user-defined Quick Key can display up to 15 different
commonly refered to screens. See Section 4.10 for how to
setup this functionality.
Remote/Local Key
R e m o te
/
L o ca l
Press this key to enable or disable remote control of the
control panel. The Remote Disabled LED indicates the status of Remote control.
Auto / Manual Key
The Auto/Manual key is present in the MJ-4B Panel. The
MJ-4A panel has discrete switch for the same functionality.
A u to /
M anual
8
This indicator is illuminated whenever one or more alerts
are active. The indicator may either flash or remain on
steadily.
•
If flashing, it indicates that one or more alert conditions are active and have not yet been acknowledged.
•
If the Alert Indicator glows steadily, it means that a
previously-acknowledged alert condition continues to
exist.
To acknowledge an Alert, view the Alert screen with the
Alert button and then press the Cancel/Reset button.
Reverse Power Flow LED
The Reverse Power Flow (RPF) indicator is illuminated
when the microprocessor senses reverse power flow. The
indicator will either be off, on, or flashing depending upon
both Power Flow mode and Current direction (see Section
4.3.11 and Table 2.1 below.
Table 2.1
Reverse Power flow Indicator Status
Power Flow Mode
RPF Indicator Status
Reverse Current1
Forward Current1
Neutral R
On
Off
Idle R
On
Off
Co-Gen
On
Off
Bi-Dir
On
Off
F Lock
Flashing
Off
R Lock
On
Flashing
1. (Real component) exceeds 1% rated current for 5 seconds
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2 Using the MJ-4A & MJ-4B Operator Panel and Controls
When the real component of load current drops below 1%
of rated current, the RPF indicator continues to display its
previous state.
Table 2.2
Band Indicator Status
Power Flow
Mode
Band Indicator Status
RPF active
and current
magnitude
exceeds I
Threshold %
RPF or FPF
with current
magnitude
below I
Threshold %,
but not = 0
FPF active
and current
magnitude
exceeds I
Threshold %
F Lock
Flash
On solid
On solid
R Lock
On solid
On solid
Flash
If the real component of current is less than 1% when the
MJ-4 Control Panel is powered up, the RPF LED is OFF
(indicates forward).
Remote Auto Inhibit LED
This indicator is illuminated when automatic tap changes
are inhibited. Either the remote operator has sent an automatic inhibit command, the Automatic Inhibit contacts
have been activated, or a local operator has pressed the
Auto/Manual pushbutton.
Remote Disabled LED
This indicator is illuminated when Remote control is disabled. When Remote control is enabled a remote operator
can change the settings, configuration, and control the
regulator remotely. When Remote control is disabled, a
remote operator can only view the status of the control
panel. Only a local operator can change the Remote control status by using the Remote/Local Switch pushbutton.
In the above table, the indicator that is flashing or is on
solid is the respective Band Indicator (High, Low, or In
Band). If all band indicators are off, it is an indication that
Voltage Limit Control (VLC) is active, and compensated
regulator output voltage is higher than the VLC upper limit,
or lower than the VLC Lower limit.
MJ-4A & MJ-4B Band Indicators
VLC Upper
Indicator
VLC Upper
Band Indicator LEDs
1v
Three Band Indicators, “High", "In Band,” and “Low,” are
located at the top of the front panel. The microprocessor
continuously compares load voltage (corrected for line
drop) against the Voltage Level and Bandwidth setpoints.
The Band Indicator LEDs show the results of this comparison (see Table 2.2).
“In Band” indicates that regulator output voltage is within
voltage and bandwidth setpoints.
“High” indicates that regulator output voltage is out-oflimits on the high side.
"High" Band
Indicator
"In-Band"
Indicator
Voltage Level
Setpoint
“Low” indicates that regulator output voltage is out-of-limits on the low side.
In all power flow modes except Neutral Reverse, if one of
the three Band Indicators is flashing, it is an indication that
tap changes are being inhibited by the control program. In
Neutral Reverse, the flashing Band Indicator in conjunction
with a Reverse Power Flow condition may mean that the
control program is returning the tap position to Neutral.
Table 2.2
Power Flow
Mode
Neutral R
"Low" Band
Indicator
VLC Lower
Figure 2.3
RPF active
and current
magnitude
exceeds I
Threshold %
RPF or FPF
with current
magnitude
below I
Threshold %,
but not = 0
FPF active
and current
magnitude
exceeds I
Threshold %
Flash
Flash
On solid
Idle R
Flash
Flash
On solid
Co-Gen
On solid
Flash
On solid
Bi-Dir
On solid
Flash
On solid
Siemens Energy, Inc.
1v
VLC Lower
Indicator
Band Indicator Status
Band Indicator Status
Bandwidth
Band Indicators and VLC Indicators
Raise / Lower LED Indicator
The Raise / Lower indicator remains on continuously
whenever the tap changer motor is raising or lowering the
tap position. The Raise / Lower indicator can be configured to Flash whenever the tap changer motor is lowering
the tap position. By choosing the setting under the<ADV
CONFIGURE> menu LowerLED.
9
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
Voltage Limit Control LED Indicators
Auto/Manual Push button (MJ-4B)
The Voltage Limit Control (VLC) indicators illuminate to
indicate that VLC is active. With the VLC upper limit activated, the VLC Upper indicator is illuminated. If the VLC
lower limit is activated, the VLC Lower indicator is illuminated.
This push button determines whether the MJ-4B Control
Panel is under manual control or microprocessor control.
Note that the ultimate determination of the point of control can be changed remotely if Remote Disabled is not
activated.
If VLC is active, and Vld is within 1 volt of the VLC limit,
the appropriate VLC and Band Indicator will both be illuminated.
Tap Control Modes
•
Manual / Auto Disabled (By-Pass Position), The operator has control of the regulator’s tap changer motor;
automatic tap changes are disabled. In this mode, a
local operator can use the Raise and Lower switches
or push buttons to adjust the tap position or a remote
operator could control the tap motor.
•
Auto Enabled. The microprocessor has control of the
tap changer motor and local manual tap changes are
disabled.
Voltage Reduction Control Active Indicator LED
This indicator is illuminated whenever Voltage Reduction
Control is in effect. The VRC LED indicator flashes a
unique pattern to indicate which stage, step, or set is
active, depending upon the VRC Mode as described in
Table 2.3. (See Section 4.4.3 for more information.)
Table 2.3
VRC Indicator Flash Patterns
Flashing
Pattern
Remote / Local Push button
VRC Modes
Remote
(MJ-X)
Remote
(MJ-3A)
Auto
Stage-1
Step 1
Set 1
long-short-short
Stage-2
Step 2
Set 2
long-shortshort-short
Stage-3
Step 3
On
Local
Active
long-short
This push button determines whether the MJ-4 Control
Panel is under local control or remote control. Note that
the ultimate determination of the point of control is established manually; this switch setting cannot be overridden
from a remote location.
•
Remote Disabled. In this mode, a remote operator
can obtain MJ-4 Control Panel data. However, the
remote operator cannot make configuration changes
or exercise control of the tap changer motor.
•
Remote Enabled. In this mode, a remote operator has
access to all functions available to the local operator,
including the ability to override automatic control of
the tap changer motor.
•
This push button is common for both the MJ-4A &
MJ-4B Panels.
Neutralite Indicator
The Neutralite indicator illuminates when the tap changer
is in the Neutral position. The Neutralite indicator also illuminates when the Neutralite Test key is pressed and held.
2.5
Switches
Power Switch
This three-position switch selects the power source for
the MJ-4 Control Panel.
•
In the upper (Normal) position, the regulator Utility
(tertiary) winding provides power through the polarized disconnect switch (PDS).
•
In the lower (External Source) position, the External
Source terminals (described below) provide power.
•
In the middle (Off) position, the Control Panel is
turned off. This is also called the By-Pass Position.
Raise and Lower Switches / Push buttons
When the Auto Disabled LED is ON, this discrete switch
or push buttons activate the tap changer motor to raise or
lower the tap position.
Tap Control Switches (Mode Select Switches)
Auto/Off/Manual Switch (MJ-4A)
In the MJ-4A panel, the 3 position discrete switch,has the
Center = OFF, Down = Manual and Up = Auto functionalities. When in Auto, the panel may be switched between
Auto-Remote or Auto-Local modes by pressing the
Remote / Local push button.
10
Siemens Energy, Inc.
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
Switch Positions for Bypassing
The front panel switches must be in the following positions before bypassing the regulator.
•
Auto / Manual - OFF (MJ-4A)
Auto / Manual - Remote Auto Inhibit LED=ON(MJ-4B)
•
Remote Switch - Remote Disabled LED is ON
•
Power Switch - OFF
Cal” or “P2 Cal” in the <DIAGNOSTICS> menu defines
the voltage (U2 or P2) you can read at these binding posts.
The binding posts are dual banana-style receptacles.
Note that the voltage measured at these binding posts is
not turns-ratio corrected. By contrast, the metered voltage
presented on the display screen (under <METER>) is corrected by control-program software. (See Section 4.3.7
and Section 4.3.8 for configuring the voltage transformer
U2/P2 turns ratio).
DANGER
2.6
WARNING
Possible explosion if bypassed while
not on neutral.
Will cause death, serious injury, or
property damage.
Voltage applied at calibration terminals may
energize regulator with high voltage through
voltage transformer.
To prevent:
Could result in death or serious injury.
Place regulator in neutral position before
bypassing and disable control panel.
See Appendix E for details.
To prevent:
Do not connect any voltage source at the
voltage calibration terminals.
Binding Posts
Front panel binding posts are dual banana-style
receptacles on standard 0.74 inch centers.
2.7
External Source Binding Posts
Power Fuse
These binding posts can be used to apply 120 V external
power to the MJ-4 Control Panel when the power source
switch is in the External Source position. The binding
posts are dual banana-style receptacles.
This 6.0 Amp fuse protects the MJ-4 Control Panel circuit
and the tap changer motor circuit.
Ensure that any voltage source attached to these binding
posts is properly polarized.
This 0.75 Amp slow-blow fuse protects the MJ-4 Control
Panel sensing circuit.
Note:
External Power Source Protection Fuse
CAUTION
Fuses
Sensing Fuse
This 6.0 Amp fuse protects the MJ-4 Control Panel circuit
and the tap changer motor circuit when powered through
the external source binding posts.
WARNING
Improper external power connection will
place 120V on the ground circuit.
May result in minor or moderate injury
including equipment damage.
To prevent:
Observe proper polarity of external power
supply.
Hazardous voltage present on various
control leads when regulator is
energized.
Could result in death or serious injury
including equipment damage from
contact with live line conductors.
To prevent:
Voltage Calibration Binding Posts
Bypass the regulator and de-energize
before removing accessory items from
the control box.
These binding posts can be used with an external voltmeter to monitor regulator P2 or U2 voltage. Displaying “U2
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11
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
2.8
Terminal Strip Connections
Complete descriptions of all terminal contacts are
provided in Appendix K.
Terminal strips are located on the lower back side of the
MJ-4 Control Panel. These terminals can be used to provide access to certain microprocessor and other control
functions. Necessary jumpers are installed at the factory
and there is no need to add or change any of them unless
you need to access the electrical signals present there.
The terminal strips include four terminal pairs for VRC control and external inhibit function. The terminal strips
include the Current Circuit terminal pair.
Each terminal strip contact is screw type, to facilitate connection and disconnection of external wiring.
Current Circuit Terminal Contacts
The nominal 200 mA secondary of the regulator current
transformer (CT) is routed through these terminals labeled
C and C2. This terminal pair is provided with a removable
shorting bar to accommodate auxiliary apparatus. These
terminals are shorted at the factory and must remain
shorted unless an appropriate external device is attached.
DANGER
Open CT secondary will result in high
voltage at CT terminals.
Will result in death or serious injury
including equipment damage.
To prevent:
Do not operate with CT secondary open.
Short circuit or apply burden at CT
secondary (C2-C) during operation.
12
Siemens Energy, Inc.
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
Power and Motor Control Terminal Contacts
A simplified schematic drawing of the power and motor control terminal connections is shown in Figure 2.3 below
.
Connections for
External Motor Power
Power Switch
On
PDS-U2
P2B
External
Source
(Line)
P2B
External
P2B
12
11
10
P2B
9
P3A
Motor
Power
Control
Relay
K7
Remote
P3A
Remote/Auto/Manual
Switch
P3A
9
8
7
U
12
U6
10
U7
9
U
U6
11
U6
Connections for
External Motor Power
(Automatic Only)
U6
12
External Power
(or connect
Relay between
U and U6)
11
10
U7
9
U
U6
U6
U7
REM-STAT
R/M Com
External Power
(or connect
Relay between
U6 and U7)
Status of Remote/Auto/Manual Switch
Switch Position REM to COM
MAN to COM
Remote
Closed
Open
Auto
Open
Open
Manual
Open
Closed
Status
Outputs
MAN-STAT
Manual
Connections for "Terminal Block" (T.B.) Remote Control
Automatic
"Lower"
Relay*
K5
Automatic
"Raise"
Relay*
K4
U-REM
P2B
Manual
Tap
Raise/Lower
Switch
5
J22
P2B
Raise
Off
4
J21
P2B
J21
3
Lower
6
K22
K22
7
7
K21
P2B
J22
4
J21
3
U-REM
6
P2B
T.B. Remote Enable/Disable of
Automatic Operations
U-REM
5
Relay
Contacts
3
U-REM
P2B
*Auto relays disabled when R/A/M
switch is in Manual position
T.B. Remote Control for
R/A/M Switch in Remote
U-REM
5
T.B.
Remote
J22
Raise
4
U-REM
6
T.B.
Remote
Lower
K22
7
K21
8
Relay
Contacts
Open - Disable
Close - Enable
K21
8
8
"J" Current Sense
P2A
"K" Current Sense
P2A
9
PDS-J
10
PDS-K
Note: The dotted-lineconnections between terminals
represent the default (factory installed) jumpers.
T e rm in a l R e m o te c o n tro l c o n n e c tio n s fo r M J -4 A
On
P D S- U 2
P 2B
External
Source
(Line)
Connections for
External M otor Power
(Autom atic O nly)
Connections for
External M otor Power
Power Switch
P 2B
External
P 2B
P 2B
12
11
10
9
U
12
U6
11
U6
10
U7
9
U
U6
U6
U7
12
External Power
(or connect
R elay betwe en
U and U 6)
11
10
9
U
U6
U6
U7
External Power
(or connect
R elay between
U 6 and U 7)
M otor
Pow er
C ontrol
R elay
K7
C o n n e ctio n s fo r " Te r m in al B lo c k" (T. B .) R e m o te C o n trol
Autom atic
"Lower"
R elay*
K5
Autom atic
"R aise"
R elay*
K4
T.B. R em ote Enable/Disable of
Autom atic O perations
P 2B
P 2B
* Auto rela ys disa bled w h e n R /A/M
s w itch is in M an u al p o sitio n
P 2B
P 2B
J2 2
J22
4
4
J2 1
J21
3
3
K22
K22
7
7
K21
R elay
Contacts
O pen - Disable
Close - Enable
K2 1
8
8
"J" Current S ense
P 2A
"K" Current S ense
P 2A
9
P D S-J
10
P D S-K
N ote: T he dotted-lin econnections betwe en terminals
represent the default (factory installed) jumpers.
T e rm in a l R e m o te c o n tro l c o n n e c tio n s fo r M J -4 B
Figure 2.4
Simplified Schematic of “Terminal” Remote Control Connections
Siemens Energy, Inc.
13
2 Using the MJ-4A & MJ-4B Operator Panel and Controls
2.9
Local Data Port
The Local Data Port on the front panel supports connection to a PC or other communications device. It transfers
data in either direction: the MJ-4 Control Panel can provide
meter and status information to an external device, and
the control program can be configured from an external
device.
Jumpered for DTE
1
2
3
The Local Data Port supports data transmission at standard data rates from 300 to 19200 baud, inclusive, using
the 2200 communications protocol enhanced with MJ-4
data fields.
The physical interface is a standard 9-pin D-type subminiature connector.
The pinouts match the PC-AT™ RS-232 port connector
(see Table 2.4):
Table 2.4
“DTE” Pin
Number(s)
J23 J22
1
2
3
1
2
3
J23 J22
1
2
3
BT1
1
2
3
J23 J22
Local Data Port Pinouts
Signal
Description
1
2
3
“DCE” Pin
Number(s)*
MJ-4 output
3
2
MJ-4 Input
2
3
Signal Ground
5
5
DCD, DSR, CTS )
-- (no connection)
-- (no connection)
Jumpered for DCE
Figure 2.5
Data Port Jumper Locations
* indicates factory default settings.
The MJ-4 jumpers on the main circuit board are internal.
See Appendix J for procedure.
Normally, only pins 2, 3, and 5 are needed to communicate through the Data Port.
See Appendix J for other jumper locations and default settings.
When using a straight-through cable, the Local Data port
should be jumpered as “DCE” for connection to a terminal
device (such as a notebook or laptop computer); and as
“DTE” for connection to a modem. By default, the Local
Data Port is jumpered as DCE.
When repositioning jumpers, use proper Electro-Static
Discharge (ESD) precautions. If possible, use an ESD
wrist strap. If no wrist strap is available, touch a grounded
surface before beginning. (Two accessible ground points
are the screw jacks of the Data Port connector.)
Figure 2.4 shows the jumper location for the Data Port
connections.
The device used for communications must be configured
to match the following Data Port items in the <COMMUNICATIONS> Menu.
•
DatPortBaud
•
Data Parity
•
DataPortAddr - If addressing is on, use the Comm
Addr parameter as the Data Port address.
14
Siemens Energy, Inc.
3 Viewing and Changing MJ-4A & MJ-4B Data Items
3 Viewing and Changing MJ-4A & MJ-4B Data Items
1.
The MJ-4 Control Panel stores a considerable amount of
data. Some of the data items are setpoints used to control
the tap changer; others are meter readings and logged historical data that can be used to monitor system activity. All
of the major data items can be displayed on the 16-character screen. The setpoints and other configuration items
can be displayed and changed from the front panel.
This chapter describes how data items are organized, how
to view a specific data item, and, if applicable, how to
change it.
3.1
Viewing Data Items
2.
The MJ-4 Control Panel provides two techniques for viewing data items:
Setup Menus define the environment. In general,
these Menus are only used at installation. Examples
include:
•
the <CONFIGURE> Menu, which defines the
regulator and its application.
•
the <REGULATOR> Menu, which defines setpoints.
•
the <LOG SETUP> Menu, which defines logging
preferences, etc.
Operational Menus contain daily operational information that can help you monitor system performance.
Examples include:
1.
Use Menu Selection keys and Scroll keys to view any
data item.
•
the <METER> Menu, which provides rms meter
readings.
2.
Use Fast-path keys to view certain frequently-used
data items.
•
the <DEMAND> Menus, which provide Demand
data.
•
the <LOG> Menu, which contains historical data.
3.2
Understanding Menus
MJ-4 Control Panel information is organized into lists
(Menus) of related data. Each specific piece of information
in MJ-4 memory is known as a data item. To view or
change a specific data item, you must select the Menu
that contains the desired item. Appendix G provides a
Menu Structure Quick Reference for help in locating a specific data item.
3.3
Using the Menu Selection Keys to
View Data Items
This section describes how the Menu Selection and Scroll
keys can be used to view data items.
Think of the Menu arrangement as a table of data items
on a sheet of paper as illustrated in Table 3.1.
For example, the <LOG SETUP> Menu contains data
items that you can use to define logging requirements. To
define logging requirements, view the <LOG SETUP>
Menu; then display the particular data item from that
Menu. As another example, the <METER> Menu contains meter-reading data. To determine the present load
voltage meter reading, view the <METER> Menu and
then the Load Voltage data item from that Menu. The
<METER> Menu is considered the home position in the
MJ-4 Control Panel's menu structure.
Each column of the table has a heading (Menu name).
Since you are viewing this “table” through a 16-character
window, you must scroll through the table to view the
desired data item. The following scrolling rules apply:
•
At the heading level, scroll through the Menu headings with the left and right Scrolling keys.
•
Within a selected menu, use the up and down Scrolling keys to step through the various data items.
MJ-4 Control Panel Menus are divided into two major categories:
Structure of MJ-4 Menus
Table 3.1
...
<FW DEMAND>
<REV DEMAND>
<COUNTERS>
...
data item 1
data item 1
data item 1
data item 1
data item 1
data item 2
data item 2
data item 2
data item 2
data item 2
data item 3
data item 3
data item 3
data item 3
data item 3
.
.
.
.
.
.
.
.
.
.
Siemens Energy, Inc.
15
3 Viewing and Changing MJ-4A & MJ-4B Data Items
If you are not sure where you are in the Menu structure,
press the Menu key once to return to the top of that
menu. Press the Menu key again to return to the
<METER> Menu or home position.
Viewing a specific data item with the Menu Selection keys
is a two-step process:
1.
2.
View the Menu that contains the desired data item by
stepping left and/or right through the Menu structure.
Use the ½ key to move left and the ¾ key to move
right. Data items are grouped according to function so
you can readily determine which Menu contains the
desired data item. (See the Menu Structure Quick
Reference in Appendix G for help in locating a specific
data item.)
View the desired data item by stepping up or down
through the Menu until you see the data item name
and its value on the display screen. Use the À key to
move down in the list; use the ¿ key to move up in
the list.
Example
Suppose you want to view the regulator Forward Time
Delay setpoint. This data item is contained in the <REGULATOR> Menu:
1.
Press the Menu key twice to return to the <METER>
Menu.
2.
Press the ¾ key multiple times to step through several menus. When <REGULATOR> appears on the
display screen, you are positioned in that Menu and
you can view its data items.
3.
16
Press the À key multiple times to step down through
the various data items in the Menu (Fwd Volts, Fwd
BW, and so on) until “Fwd Delay nnnS” appears.
“nnn” will be the currently stored value (in seconds)
for Forward Time Delay.
3.4
Changing Data Items
To change data, you must first view it, as described above.
Then press the Change key. The displayed value flashes to
indicate that a Change will be accepted and to indicate the
data that is to be changed. Press the ¿ and À keys to
sequence through the acceptable values. When the
desired value is displayed, press the Save key to complete
the change.
The procedure for changing configuration parameters is
slightly different from the procedure for changing alphanumeric ones. Examples of each type of change follow:
Changing Configuration Parameters
In some cases, you will be choosing from one of several
alphabetic settings (for example, the <CONFIGURE>
Menu asks you to select among three System types:
WYE, DELTA LAG, and DELTA LEAD).
Example
Suppose you want to change the system type from Delta
Lag to Wye. You know (perhaps from checking the Menu
Structure Quick Reference Appendix G) that the System
data item is in the <CONFIGURE> Menu, so you must
first scroll to that Menu.
1.
Press the Menu key twice to return the display to
<METER>.
2.
Press the ¾ key to step through the Menus until
<CONFIGURE> is viewed.
3.
Press the À key until Syst: appears. In this example,
the display screen would indicate that the present
setting is Syst:DELTA LAG.
4.
Press the Change key. DELTA LAG flashes to indicate that it is the data to be changed. Note: The
underscore in this section of the manual denotes
flashing.
5.
Press the À key to see the next option. Syst:DELTA
LEAD appears on the screen.
6.
Press the À key again to see another option.
Syst:WYE appears. Since this is the option you want,
press the Save key to complete the change. Syst:
WYE continues to appear, but WYE no longer
flashes. This indicates that the change has been
accepted.
Siemens Energy, Inc.
3 Viewing and Changing MJ-4A & MJ-4B Data Items
Changing Alpha or Numeric Settings
The process of changing alpha or numeric settings is similar to that of changing configuration parameters, except
that there are more choices because there may be multiple characters to change, and each character may range in
value from 0 to 9, and/or A-Z.
Example
Suppose you want to change the regulator Forward Volts
setpoint from 123.0 volts to 122.5 volts. Setpoints are contained in the <REGULATOR> Menu, so you need to view
that Menu.
1.
Press the Menu key twice to return the display to the
<METER> Menu.
2.
Press the ¾ key repeatedly until <REGULATOR> is
viewed.
3.
Press the À key until FwdVolts: 123.0 appears.
4.
Press the Change key to activate Change mode. (The
flashing digit indicates the digit to be changed.) FwdVolts: 123.0 appears. Note: the underscore in this
section of the manual (in this case under the 0)
denotes flashing.
5.
Press the ¿ key five times to increment the digit from
0 to 5.
6.
Press the ½ key to step left one digit. FwdVolts:
123.5 appears. The digit 3 is flashing to indicate that it
can be changed.
7.
Press the À key to decrement the digit from 3 to 2.
8.
Press the Save key to make the change take effect.
FwdVolts: 122.5 appears. The flashing stops to indicate that the change is complete.
Siemens Energy, Inc.
3.5
Using the Fast-Path Keys to View/
Change Data Items
Fast-path keys are the labeled keys on the middle portion
of the MJ-4 Control Panel, such as the Voltage Level key.
Use the Fast-path keys as a shortcut to certain frequentlyused data items. Simply press the fast-path key and the
desired data item appears immediately.
After viewing an item with a fast-path key, the change procedure is the same as the one just described. In the previous example, the Voltage Level fast-path key would
replace steps 1-3 and save a number of key strokes.
17
4 Setting Up the MJ-4A & MJ-4B Control Panel
4 Setting Up the MJ-4A & MJ-4B Control Panel
4.1
Setup—Overview
Communications Definition
MJ-4 Control Panel setup procedures allow you to customize the control panel to your needs and to the environment
in which it is installed. You can describe specific regulator
parameters and power-flow conditions, and define automatic-mode operation. Previous generation controllers
used dip switch settings and jumpers for this purpose.
With the MJ-4 Control Panel, simply use front panel touchkeys and the display screen to define the operating environment. Also, the MJ-4 communication facilities in conjunction with the MJXplorer software can be used to set
up the MJ-4 Control Panel.
In this step, use the <COMMUNICATIONS> Menu to
define communications parameters (baud rate, unit
address, etc.).
This chapter describes each of the setup parameters, and
explains how they are defined. The Communications Module Instruction book contains additional detail and background information to help you make the proper
selections.
The setup process for the MJ-4 Control Panel consists of
several steps:
Configuration
In this step, use the <CONFIGURE> Menu to describe
the regulator and the power distribution system. Use the
<ADV CONFIGURE> Menu to adjust optional or
advanced settings if desired.
Setpoints
In this step, use the <REGULATOR> Menu to define
Automatic Mode setpoints (voltage level, bandwidth, time
delay, etc.).
Logging Requirements
In this step, use the <LOG SETUP> Menu to define data
logging requirements (what values you want logged, how
often, under what conditions, etc.).
Security Definition
In this step, use the <PASSWORD> Menu to define passwords and to activate security protection.
Table 4.1
Note: Depending upon the version of software in
your MJ-4 Control Panel, your menus may be
slightly different than those described. If your
control panel does not support all of the features described, please contact your Siemens
representative for details about obtaining the
latest version of the software.
The <CONFIGURE> Menu
DATA ITEM
TapChngr
Type
Syst
DeltaPwr
Utility Pol
Vprimary Max
U2 PT
P2 PT
CTratio
I FullLoad
PwrFlow
Basis volts
NeutOvRun
Reset Min/Max?
DESCRIPTION
Tap Changer Type
Regulator type
System wiring configuration
Delta power configuration
Utility winding polarity
Maximum primary voltage
Utility winding turns ratio
Potential Transformer turns ratio
Current Transformer turns ratio
Regulating Device Full Load Rating
Power flow modes
Controller nominal voltage level
Neutral Over Run
Reset all min/max readings
VALID INPUTS
SIEMENS, GE, LTC, LTC.5, or COOP SD, DD, or QD
STRAIGHT or INVERTED
WYE, DELTA LAG, DELTA LEAD
OPEN or CLOSED
NORM, REV
65K (for regulators) or 650K (for LTC transformers)
1500 to 65,500:100 to 150
1500 to 65,500:100 to 150
50 to 7200:0.0 to 9.5
50 to 7200
F LOCK, R LOCK, IDLE R, BI-DIR, NEUT R, CO-GEN
115, 120, or 125v
0.0 to 3.0 seconds
N or Y
DEFAULT
SIEMENS
STRAIGHT
WYE
OPEN
NORM
65K
7200:120
7200:120
200:0.2
200
F LOCK
120
2.0
N
INC
------------1 Volt
1 Volt
1:0.1
1 Amp
----0.1 sec
---
Vers
Microprocessor software version
NN.NNNN
---
---
Memo1
User-supplied text
Up to 10 Characters
Reg. Serial#
---
Memo2
User-supplied text
Up to 10 Characters
Tested by
---
18
Siemens Energy, Inc.
4 Setting Up the MJ-4A & MJ-4B Control Panel
Table 4.2
The <ADV CONFIGURE> Menu
DATA ITEM
Meter Volts
I Threshold %
I Shift
I Load Max
PT Threshold
Time
Date
Format
Daylight Savings
Dmd Type
Dmd Time
DmdSubperiods
Min/Max t.o.
Screen t.o.
Quick t.o.
QuickDispTim
Auto Variamp
Soft Variamp
DESCRIPTION
Display Primary or Secondary volts
Tap change minimum current
Current shift for reverse power flow
Max. Load Current (for Overcurrent)
Tap change low voltage limit
Time of day
Date
Date format
Daylight Savings Time
Method for determining Demand
Demand Period length (minutes)
Number of Demand subperiods
Min/Max display timeout (seconds)
Show default display screen(min.)
Quick menu display timeout second
Quick menu slideshow time second
Automatic Variamp Protection
Software Variamp setting
VALID INPUTS
SEC, PRI
0% to 10%
0° to 359°
0% to 350%
0 to 134
HH:MM:SSA/P
NN/NN/NN
MO/DA/YR or DA/MO/YR
ON or OFF
THERMAL or WINDOW
1 to 999
1 to 99 (For Sliding Window mode only)
1 to 99
1 to 99
1 to 59
1 to 10
ON or OFF
ON or OFF
DEFAULT
SEC
0%
0°
350%
90
----MO/DA/YR
ON
THERMAL
30
6
15
5
10
2
OFF
OFF
INC
--1%
1°
1%
------------1 Minute
1
1 Second
1 Minute
1 Second
1 Second
-----
R Limit
L Limit
Raise Limit (Alert & Soft Variamp)
10, 8¾, 7½, 6¼, 5
10
---
Lower Limit (Alert & Soft Variamp)
10, 8¾, 7½, 6¼, 5
10
Slave-Master
---
Put two tap changers in locked step
OFF, MA, SL, S2
OFF
---
Tap Alert
Enable or disable tap alerts
ENABLE or DISABLE
ENABLE
---
Alrt M= C= S=
Metering, Control, & System alerts
Y (to enable) or N (to disable)
Y, Y, Y
---
Tap Resync
Synchronizes tap position at Neutral
ON or OFF
OFF
---
CommAutoInh
Turns SCADA auto inhibit on or off
ON or OFF
OFF
---
DspScr
Defines default display screen
<METER>, TapContr, Vld, Vcomp, Ild, or TotalOps
<METER>
---
LowerLED
Raise Lower Indicator Functionality
Solid, Blink
Solid
---
P2 Calc
P2 Calculation
ON,OFF
ON
---
U2/P2out
Load Voltage Terminal Locking
Vload, Toggle, U2, P2
Vload
---
I Dir Bias
Current BiasFunctionality
None, Fwd, Rev, NeutT
None
---
Bias %
Current Bias Percent
0 to 10%
0%
---
Remote Btn
Remote / Local Button Functionality
Enabled, Disabled
Enabled
---
4.2
Setup for Retrofit Panels
If you are retrofitting either a G. E. or Cooper regulator for
use with the Siemens MJ-4 Control Panel, please refer to
the respective Application Note. Contact your Siemens
representative for details.
4.3
Defining Your Regulator—
the <CONFIGURE> and <ADV
CONFIGURE> Menus
When the MJ-4 Control Panel is delivered pre-installed on
a regulator, many of the configuration variables are already
set. However, the MJ-4 Control Panel provides a wide
range of additional variables that can be used to make the
regulator perform more effectively in your system.
Variables in the <CONFIGURE> Menu are summarized in
Table 4.1; variables in the <ADV CONFIGURE> Menu are
summarized in Table 4.2; both menus are explained in the
following pages.
Siemens Energy, Inc.
Figures 4.1 to 4.4 show typical Siemens regulator nameplates. Refer to these figures for information that can be
obtained from Siemens regulator nameplates
CAUTION
Use of incorrect drawings or Schematics
Could result in minor or moderate injury including
damage to the regulator or control components
Use the Example diagram for illustration purposes.
Refer to the regulator nameplate for the proper
control diagram to use with a particular installation
19
4 Setting Up the MJ-4A & MJ-4B Control Panel
SIEMENS
5/8% Step-Voltage Regulator
Single Phase Type JFR
TapChngr SIEMENS
Serial No.
60 Hz
55 C Rise
95 BIL
Class 0A
76.2 kVA 7620 volts 10% in 32 - 5/8% Steps
100 Amps
Fluid PCB co ntent :
Less tha n 1 p pm at tim e of manufacture
Untanking Hgt
Untanking Wgt
114 in.
937 lbs.
% Regulation
Max Amps
=
=
10
100
8 3/4
110
7 1/2
120
6 1/4
135
Oil
Total Wgt
5
160
=
=
Control & M otor
Volts
Connect
E-P2
*
127 V
P2-P3
121 V
P2-P3
123 V
P2-P4
118 V
P2-P4
124 V
P2-P5
125 V
P2-P6
121 V
P2-P7
Control Panel Conn
PA
P14A
Control
to
to
Volts
20
27
120 V
21
120 V
20
23
120 V
20
21
120 V
23
20
125 V
21
20
20
125 V
25
21
125 V
Reverse Power Flow - Connect Source Side
Voltage Transformer per Table 2.
U2PT: 7620:121
62 gals
1598 lbs.
* Control diag :
Nameplate :
Forward Power Flow - Connect Load Side
Voltage Transformer per Table 1.
Load
Volts
10%
8000
7620
7200
6930
5000
4330
2500
I FullLoad 100
ASTM D-3487 Type II Mineral Oil
Insulating Fluid :
CTratio 100:0.2
SOURCE
SL
S
LOAD
L
CT
100 : 0.2
AMPS
E1
C3
E3 P13 P14 P15
Tap Changer
Reversing Switch
Tap Changer
Preventive
Autotransformer
K
M
0
Control Panel Conn
Control & M otor
Source
Volts
Volts
Connect
PB
P14B
Control
10%
E-P12
*
to
to
Volts
120 V
P12-P13
20
120 V
8000
20
120 V
P12-P14
7620
20
20
120 V
120 V
P12-P15
7200
20
20
120 V
Aluminum conductor in shunt winding.
Aluminum conductor in series winding.
A
B
1 23 456 7 8
P7
P6
P5
P4
P3
E2
Utility Pol NORM
(E2 to right of P terminals)
CT sec conn C2 to C3
Do not by-pass unless on neutral and control switch on panel is off
See instruction book before placing in service.
P2PT: 7620:120
S i e m e n s P o w e r T r a n s m i s s i o n & D ist r i b u t i o n , I n c .
Made in U S A
Jackson, MS
21-115905-002
Figure 4.1 Typical Siemens Regulator Nameplate for older ANSI Type B (Inverted) Regulator
Note: Items are not highlighted on actual nameplate
TapChngr SIEMENS
I FullLoad 328
Type STRAIGHT
CTratio 400:0.2
Utility Pol NORM
(E2 to right of
U Terminals)
U2PT: 7620:124
P2PT: 7620:124
Figure 4.2
20
Typical Siemens Regulator Nameplate for ANSI A (Straight) regulator without a Load Side PT.
Siemens Energy, Inc.
4 Setting Up the MJ-4A & MJ-4B Control Panel
SIEMENS
5/8% Step-Voltage Regulator
TapChngr SIEMENS
Serial No.
Single Phase Type JFR
60 Hz 55 C Rise
95 BIL
Class OA
167 kVA 7620 volts 10% in 32 - 5/8% Steps
219 Amps
Insulating Fluid : ASTM D-3487 Type II Mineral Oil Less than 1 ppm PCB
Untanking Hgt = 131 in. Oil = 91 gals.
Untanking Wgt = 1126 lbs. Total Wgt = 2100 lbs.
ANSI TYPE "A"
U2PT: 7620 : 125
% Regulation
Max Amps
7970 V
7620 V
7200 V
Load
Volts
10%
7970
7620
7200
10
210
219
232
* Volt Tran
Sec conn
P2 to
P3 - 120 V
P4 - 120 V
P5 - 120 V
8 3/4
230
241
255
7 1/2
251
263
278
6 1/4
Control
Contr
Panel
Volts
P to P14 to
20
20
120
20
20
120
20
20
120
Type STRAIGHT
CTratio 250:0.2
SOURCE
5
283
296
313
I FullLoad 219
335
351
371
* Aux volts
Motor Conn
U2 to Volts
U3
117
U4
125
U4
118
LOAD
L
S
CT
E1
250 : 0.2
C3
AMPS
M
SL
Tap Changer
Reversing Switch
P5 P4 P3 E3
K
B A
8 7 65 4 3 2 1
0
Tap Changer
Preventive
Autotransformer
U7 U6 U5 U4 U3 E2
Control diag : 21-203-980-414
Nameplate
: 21-115-907-435
P2PT: 7620 : 120
CT sec conn C2 to C3
Copper conductor in shunt winding.
Aluminum conductor in series winding.
Tank withstands full vacuum
DATE:
Utility Pol NORM
(E2 to right of
U Terminals)
Do not by-pass unless on neutral and control switch on panel is off
See instruction book before placing in service.
S i e m e n s P o w e r T r a n s m i s s i o n & D is t r i b u t i o n , I n c .
Ja ckson , MS
Made in U S A
Figure 4.3
21-115-907-010
Typical Siemens Regulator Nameplate for ANSI Type A (Straight) regulator
Note: Items are not highlighted on actual nameplate.
SIEMENS
5/8% Step-Voltage Regulator
TapChngr SIEMENS
Serial No.
Single Phase Type JFR
60 Hz 55 C Rise
95 BIL Class 0A
76.2 kVA 7620 volts 10% in 32 - 5/8% Steps
100 Am ps
Insulating Fluid : ASTM D-3487 Type II Mineral Oil Less than 1 ppm PCB
Untanking Hgt = 117 in. Oil = 64 gals.
Untanking Wgt = 682 lbs. Total W gt = 1431 lbs.
ANSI TYPE "B"
% Regulation
7620 V Amps
Load
Volts
10%
8000
7620
7200
5000
4330
2500
10
100
8 3/4
110
Control & Motor
Volts
Connect
E-P2
*
P2-P3
122 V
P2-P4
122 V
P2-P4
115 V
P2-P5
122 V
P2-P6
122 V
P2-P7
118 V
7 1/2
120
6 1/4
135
5
160
Control Panel
PA
P14A
to
to
23
21
23
21
20
25
20
23
20
23
20
27
Conn
Control
Volts
120 V
120 V
120 V
125 V
125 V
125 V
I FullLoad 100
Type INVERTED
CTratio 100:0.2
SOURCE
S
LOAD
L
SL
CT
E1
100 : 0.2
C3
AMPS
Tap Changer
Reversing Switch
K
M
0
Tap Changer
Preventive
Autotransformer
A B
8 76 5 4 3 2 1
P7
P6
P5
P4
P3
E2
Control diag : 21-203-980-468
Nameplate
: 21-115-905-464
U2PT: 7620: 122
P2PT: 7620: 122
CT sec conn C2 to C3
Copper conductor in shunt winding.
Aluminum conductor in series winding.
Tank withstands full vacuum
DATE:
Utility Pol NORM
(E2 to right of
P Terminals)
Do not by-pass unless on neutral and control switch on panel is off
See instruction book before placing in service.
S i e m e n s P o w e r T r a n s m i s s i o n & D ist r i b u t i o n , I n c .
Made in U S A
Jackson, MS
21-115905-002
Figure 4.4 Typical Siemens Regulator Nameplate for ANSI Type B (Inverted) Regulator
Note: Items are not highlighted on actual nameplate.
Siemens Energy, Inc.
21
4 Setting Up the MJ-4A & MJ-4B Control Panel
The <CONFIGURE> Menu
4.3.5
4.3.1
The Utility Pol data item allows you to correct for polarity
differences between the CT winding and the Utility (Tertiary) winding.
TapChngr (Tap Changer Type)
The TapChngr data item defines the tap changer mechanism type. Tap changer mechanisms vary among regulating device suppliers. This data item allows the MJ-4 to be
configured specifically for the connected tap changer
device.
4.3.2
Type (Regulator Type)
The Type data item defines the step-voltage regulator
type. The designations “straight” (ANSI Type: A) and
“inverted” (ANSI Type: B) are frequently used to denote
the difference. See Figures 4.1 to 4.4 for examples.
Since November, 1995, the regulator type is identified by
either an ANSI Type A or B designation. Older nameplates
did not include this information and the type must be
determined from the schematic diagram on the regulator
nameplate.
“STRAIGHT” design characteristics: (See Figure 4.2 and
4.3)
•
The source (‘S’) bushing is connected to the tap
changer reversing switch and to one end of the main
winding.
•
The load (‘L’) bushing is connected via the preventive
autotransformer to the moving contacts of the
tapchanger.
•
The utility (tertiary) winding leads are labeled U3, U4,
U5, ... etc.
“INVERTED” design characteristics: (See Figures 4.1 and
4.4)
•
The source (‘S’) bushing is connected via the preventive autotransformer to the moving contacts of the
tap changer.
•
The load (‘L’) bushing is connected to the tap changer
reversing switch and to one end of the main winding.
•
Utility (tertiary) winding leads are labeled P3, P4,
P5, ... etc.
4.3.3
System (Regulator Installation)
The System data item defines whether the regulator is
Delta or Wye-connected. See Appendix D, section D.1 for
guidance in determining which regulator is leading and
which is lagging (for Delta-configured regulators).
4.3.4
DeltaPwr (Delta Power)
The Delta Pwr item defines the wiring arrangement for
Delta-connected systems. Specify either Open or closed.
The setting does not matter for a Wye-connected system.
22
Utility Pol (Utility Polarity)
To define the Utility Polarity, view Utility Pol; then,
1.
If you have a single-phase Inverted-type regulator,
specify Utility Pol:Norm.
2.
If you have a single-phase Straight-type regulator, see
Appendix D, section D.3.
4.3.6
Vprimary Max
The Vprimary Max setting defines the maximum voltage
on the primary side of the U2 PT and P2 PT ratios. Set
650k for LTC transformers; use the default of 65k for voltage regulators.
4.3.7
U2 PT (Utility (tertiary) Winding)
The U2 Potential Transformer ratios are used by the control program to scale the voltages supplied by the regulator to the basis voltage (nominal 115, 120, or 125 V).
Many regulators are built with transformer turns ratios that
do not provide the exact basis voltage (115, 120, or 125 V)
to the controller. Previous generation controllers include a
tapped sensing transformer to correct the voltage. Instead
of using a sensing transformer, the MJ-4 corrects the voltage mathematically, using the U2 PT turns ratio. Determine the turns ratio for the regulator from the regulator’s
nameplate.
The U2 PT data item defines the turns ratio of the winding
that appears at the U2 terminal on the Polarized Disconnect Switch (PDS).
To define the turns ratio, you must first determine which
column in the nameplate describes the “U2” secondary
for a given primary voltage. The U2 pin is attached to the
regulator Utility Winding. The U2 lead provides the power
to the controller, and is always present. It is often labeled
Motor Conn. or Control & Motor on the nameplate. See
Figure 4.1 to 4.4 for examples.
View U2 PT, then specify the turns ratio exactly as it is
specified on the regulator nameplate (e.g., 7620:121). The
microprocessor will correct the reference voltage to the
basis voltage (115, 120, or 125 V).
4.3.8
P2 PT (Potential Transformer)
The P2 PT data item defines the turns ratio of the Potential
Transformer appearing at the P2 terminal on the Polarized
Disconnect Switch (PDS).
Note: For regulators with no potential transformer,
set the P2 ratio to the same value as the U2
ratio.
Siemens Energy, Inc.
4 Setting Up the MJ-4A & MJ-4B Control Panel
Many regulators are built with transformer turns ratios that
do not provide the exact basis voltage (115, 120, or 125 V)
to the controller. Previous generation controllers include a
tapped sensing transformer to correct the voltage. Instead
of using a sensing transformer, the MJ-4 corrects the voltage mathematically, using the P2 PT turns ratio. The turns
ratio for a given regulator can be determined from the regulator’s nameplate.
4.3.11
To define the turns ratio, you must first determine which
column in the nameplate describes the “P2” secondary
for a given primary voltage. P2 describes the pin on the
Polarized Disconnect Switch (PDS, or jack plug). The P2
pin is attached to the regulator Potential Transformer secondary (if present), and is usually labeled Control Volts on
the nameplate. See Figures 4.1 to 4.4 for examples.
This section provides an introduction to each of the
modes, and describes how to select the desired mode.
See Chapter 7 for a detailed discussion of the operational
differences between the modes.
Note: For an ANSI type B regulator, the utility winding tap leads are labeled P3, P4, P5, ...etc. and
the P2 lead is connected to the U2 terminal on
the PDS.
View P2 PT, then specify the turns ratio exactly as it is
specified on the regulator nameplate (e.g., 7620:121). The
microprocessor will correct the reference voltage to the
basis voltage (115, 120, or 125 V). Default value is 120 V.
If an inverted (Type B) regulator has a source-side Potential
Transformer, the utility (tertiary) winding leads are labeled
P3, P4, etc., and the P2 lead is connected to the “U2” terminal on the PDS. The source-side PT leads are now
labeled P12, P13, etc., and the P12 lead is connected to
the P2 terminal on the PDS in the control box.
Note also that no reverse power flow relay is required. The
microprocessor senses the reversal and applies the appropriate polarity.
4.3.9
CTratio (Current Transformer Ratio)
The Current Transformer ratio defines scaling for current
measurements.
View CTratio: then specify the ratio exactly as specified on
the nameplate. See Figures 4.1 to 4.4 for examples.
Power Flow Modes
The Power Flow Mode data item allows you to specify
which control program algorithm will be used under
reverse power flow conditions. Systems which experience
power flow reversals have unique control requirements.
The MJ-4 Control Panel senses the reversal and modifies
its operation based on the Power Flow Mode selected.
Forward Locked Mode
This mode of operation (F LOCK) is intended for use in
systems where reverse power flow is not anticipated. Tap
changes are inhibited under reverse power flow conditions.
Reverse Locked Mode
This mode of operation (R LOCK) is intended for use in
systems where forward power flow is not anticipated. Tap
changes are inhibited under forward power flow conditions. For this mode a Source-side Potential Transformer is
no longer required. See Sections 5.1 and 5.2.
Bi-directional Mode
This mode of operation (BI-DIR) is intended for use in systems where reverse power flow is anticipated and voltage
regulation is desired under both forward and reverse
power flow conditions. For this mode a Source-side Potential Transformer is no longer required. See Sections 5.1
and 5.2.
Idle Reverse Mode
This mode of operation (IDLE R) is intended for use in systems where reverse power flow is to be treated as an
abnormal situation. When reverse power flow is recognized, the regulator idles at the last tap position held
before the reversal.
Neutral Reverse Mode
The primary side of this ratio is also used by the control
program to define the CT primary rating. This rating and
the I Threshold % define a tap change deadband for use
during certain reverse power flow conditions. (I Threshold
% is described below.)
This mode of operation (NEUT R) is intended for use in
systems where reverse power flow is to be treated as an
abnormal situation. When power flow reversal is recognized, the regulator returns the tap changer to the neutral
tap position.
4.3.10
Co-Generation Mode
I Full Load
This item specifies the Full Load Current for use in determining when an Overcurrent condition occurs. Typically,
the Full Load Current setting is the same as the CT Primary (the first number of the CT Ratio screen), though this
is not always the case. Locate the regulator’s Full Load
Current specification on the upper right side of the nameplate (just below the “Class” specification). The regulator
nameplate shows the Full Load Current as “XXX Amps.”
Enter the value for the Full Load Current setting into the
MJ-4. See Figures 4.1 to 4.4 for examples.
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This mode of operation (CO-GEN) is for use in systems
where consumer-generated power may sometimes flow
from the consumer to the Utility. Under reverse current
flow conditions, forward regulation is allowed, using
reverse Line Drop Compensation settings.
4.3.12 Basis volts (Basis Volts)
The Basis Volts data item defines whether the MJ-4 control program is to convert the regulator transformer sec-
23
4 Setting Up the MJ-4A & MJ-4B Control Panel
ondary voltage to 115, 120, or 125 volts. See U2 PT and P2
PT data items above. Also see Section 5.3.2.
The <ADV CONFIGURE> Menu
4.3.13 NeutOvRun (Neutral Overrun)
4.3.17 Meter Volts (Meter Scaling)
The Neutral Overrun data item keeps the tap motor on for
a specified amount of time when making a tap change
into the neutral tap position. This ensures that the reversing switch is always closed in order to prevent the contacts from corroding due to capacitive discharge. For
regulators with a TLG mechanism set to 2.0 seconds. For
regulators with a TLF mechanism set to 1.7 seconds.
The Meter Volts data item determines which voltage is
presented on the display screen. You can choose either
the Primary side (system voltage—e.g., 7620 V) or the
Secondary side (120 V nominal).
4.3.14 Min/Max Reset
Specify PRI if you wish to monitor the system-level voltage; specify SEC if you wish to monitor voltage scaled to
the nominal 120 volt range. Voltages in the <METER>
Menu are displayed according to the Meter Volts setting.
The Min/Max Reset data item resets Meter and Demand
max/min values in the microprocessor to current instantaneous values. This function is useful when setting up the
microprocessor for the first time, or when you want to
reset electronically-maintained values.
Note: Power and energy calculations are always
derived from the system-level voltage and are
not affected by the Meter Volts setting.
Note: Do not use this function unless you want to
reset all Meter and Demand min/max values;
to reset selected values, use the Cancel/Reset
key described in Chapter 2.
The I Threshold % data item defines a threshold for load
current magnitude, below which automatic mode tap
changes are inhibited. This threshold is defined as a percentage of the CT primary rating. (See CTratio above.)
To request that Meter and Demand Max/Min values be
reset, view Reset Max/Min; use the Change key and the
Scroll keys to change the default N(o) to Y(es). Then press
the Save key to complete the change process.
For example, in the case of a regulator with a CTratio of
200:0.2, the CT primary rating would be 200 A. If you
specify I Threshold % = 4, you are defining a low current
threshold of 8 A. (4%*200 A = 8 A).
4.3.15 Version
To set the low current threshold, view I Threshold %: and
specify a percentage of the full scale CT primary rating.
Main Processor software version NN.NNNN. This data
item displays the installed version of the microprocessor
control program.
4.3.16 Memo 1 and Memo 2
These two data items allow you to record installation-specific information that can be viewed at a later time. For
example, you might wish to use one Memo to document
the regulator’s serial number, and the other Memo to document its location. This information could then be viewed
by a remote operator via a communications link.
To enter data into these data items, view the <CONFIGURE> Menu; then use the Scroll keys to view Memo 1 or
Memo 2. The display screen responds by flashing the
“blank” character („) in the leftmost position of the tencharacter Memo field. This indicates the character to be
changed. Use the ¿ and À keys to step through the alpha
and numeric characters until the desired character is presented on the display screen. Then press the ¾ key to
move the cursor to the next character to the right, and so
on until all ten characters of the Memo have been entered.
When you have completed entering the Memo, press the
Save key to complete the change.
Valid characters are A-Z; 0-9; space; comma; semi-colon;
period; dash; slash; ampersand (&), and the # character.
Default is for Memo 1 to contain the regulators serial number and for Memo 2 to contain the initials of the control
panel tester.
24
4.3.18 I Threshold % (Low Current Threshold)
4.3.19
I Shift (Current Shift)
The I Shift data item compensates for system current-tovoltage phase differences. Consult the factory for proper
application of this data item. (Note: This data item is primarily intended for use with Load Tap Change (LTC) transformers.)
4.3.20 I Load Max (Maximum Load Current)
This item specifies the Maximum Load Current as a percentage of the Full Load Current. When the load current
(Ild) exceeds the Maximum Load Current, the MJ-4 activates the Overcurrent Alert condition.
4.3.21 PT Threshold (Potential Transformer
Threshold)
The PT Threshold data item defines a low-voltage threshold. This parameter allows you to specify a voltage level
below which automatic mode tap changes will be inhibited.
4.3.22 Time and Date Items
Time (Time of Day)
The Time data item allows you to set the real-time clock.
Specify the present time, TIME: HH:MM:SS A/P (e.g.,
04:34:54P).
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4 Setting Up the MJ-4A & MJ-4B Control Panel
Date
The Date data item allows you to set the real-time calendar. Use the format selected in the Format item. If the format defined below is MO/DA/YR, enter the date as 09/30/
07.
Format
The Format item allows you to set the format for the Date.
Daylight Sav (Daylight Savings Time)
The Daylight Sav data item automatically adjusts the clock
for the time changes on the second Sunday in March and
lfirst Sunday in November.
4.3.23 Demand Methods
Demand values are system parameters that have been
averaged over a user-defined time period. Demand values
are accumulated separately for both forward and reverse
power flow conditions. Demand values can be viewed in
the Forward and Reverse <DEMAND> Menus. (See
Chapter 5.)
The MJ-4 Control Panel accumulates demand values for
Load Voltage, Source Voltage, Compensated Voltage,
Load Current, kW, kVAR, and kVA. In addition, Power Factor is stored whenever a new kVA maximum or minimum
is recognized.
periods and specify the number of subperiods as a number between 1 and 99.
Thermal Method
The Thermal method is typical of the characteristic time
lag of mechanical or thermal devices as they absorb electrical energy. It is based on the Code for Electricity Meters,
ANSI C12-1975, which defines the interval of a thermal
demand meter as the time required for the meter to indicate 90% of a change in the load. Demand values are
updated once each second.
For example, if you specify DmdTime = 15, the demand
meter indicates 90% of a steady load fifteen minutes after
the load is applied. In the next fifteen minutes, it responds
to 90% of the remainder of the total load. As a result, the
load is constantly averaged and transient variations are not
reflected.
Note: The Demand Subperiod data item is ignored by
the Thermal method.
4.3.24 Min/Max t.o. (Min/Max Time Out)
The Min/Max t.o. data item defines the length of time that
the Min/Max data items will be presented at the display
screen. At the end of this period, the display returns to the
present value.
•
system power up.
To specify the Min/Max timeout period, view Min/Max
t.o.; use the Change key and the Scroll keys to define the
number of seconds in the time-out period. Then press the
Save key to complete the change process.
•
when demand configuration items are changed.
4.3.25 Screen t.o. (Screen Time Out)
•
when power flow direction changes.
Demand calculations are reset at the following times:
When a demand value is reset, dashes ‘-’ appear on the
display screen until completion of the first demand period.
The MJ-4 Control Panel provides two methods of computing demand: the Sliding Window method and the Thermal
averaging method.
Sliding Window Method
The Screen t.o. data item defines the length of time that
any data item is displayed. At the end of the timeout
period, the display returns to the default display defined
by the DspScr data item.
4.3.26 Quick t.o. (Quick Time Out)
The Quick t.o. data item defines the length of time that
the Quick List data items will be presented at the display
screen. At the end of this period, the display returns to the
previous screen. See section 4.9.
The Sliding Window (or rolling interval) method divides the
time interval into subperiods. Meter values are individually
recorded once each second. At the end of each subperiod
an average value is derived for each Meter value; the values for the oldest subperiod are discarded and new
demand values are calculated.
4.3.27 QuickDispTim (Quick Display Time)
The DmdTime parameter specifies the number of minutes in the period; the DmdSubperiods parameter specifies the number of subperiods in the demand period. For
example, a DmdTime of 30 minutes and a DmdSubperiod
of 6 subperiods defines a thirty minute sliding window
that moves every five minutes.
4.3.28 Auto Variamp
To use the Sliding Window method, view Dmd Type and
specify WINDOW. Then view DmdTime and specify the
length of the period in minutes (1 to 999); view DmdSub-
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The QuickDispTim data item defines the length of time
that each data item in the Quick List will be displayed
before moving to the next item when the Quick List is in
its slide show mode. See section 4.9.
The Auto Variamp data item enables a capability that automatically reduces the tap position based on the average
load current over the last 10 minutes compared to the I
Full Load. For example, if the regulator is at 105% of its
rated current on average for the last 10 minutes, the regulator will not be permitted to move past 14 raise or lower
and it will move to 14 raise or lower if it is on a higher tap.
If the regulator is at 140% of its rated current on average
25
4 Setting Up the MJ-4A & MJ-4B Control Panel
for the last 10 minutes, the regulator will not step past 8
raise or lower and it will move to 8 raise or lower if it is on
a higher tap.
When planning to overload a regulator use either the Soft
Variamp or the knobs on the position indicator. Auto Variamp is for protection in case of accidental overload only.
The Variamp limits are defined in the voltage regulator
instruction manual.
4.3.29 Soft Variamp (Software Variamp)
4.3.34 Tap Resync
The Tap Resync data item determines whether the electronic tap position will resynchronize itself to neutral when
the tap changer is on the neutral tap. Turning this data
item OFF results in better tap tracking and the control will
not adjust its tap position according to the neutral signal.
Turning this data item ON will require the neutral signal
status to precisely match the electronically tracked tap
position and the timing of the operations counter or the
maintained tap position will be purposely discarded.
The Soft Variamp data item is a software implementation
of Vari-Amp knobs on the position indicator. If set ON,
then R Limit % and L Limit % will prohibit tap raise/lower
past that position. The regulator will be limited by both
the Vari-Amp knobs and the Soft Variamp. The actual
boundary will be the most restrictive combination of the
two (e.g., knobs limit R to 10%, L to 7.5% and software
limit R to 5% and L to 8.75%. In this case the limits
would be R at 5% and L at 7.5%).
4.3.35 CommAutoInh (Communications Auto
Inhibit)
4.3.30 R Limit, L Limit
4.3.36 DspScr (Default Display Screen)
These items set the Tap Position Raise and Lower Limit
values; the control uses the limit values to check for
“raise/lower limit reached” Alert conditions. Configure
these parameters to match the Vari-Amp settings on the
side of the Tap Position Indicator Dial mounted on the regulator. (For most applications, the Vari-Amp settings are at
10%.) If the Tap Position reaches or exceeds the R Limit
Setting, the control activates the “R Limit Reached” Alert.
Likewise, if the Tap Position reaches or exceeds the L
Limit Setting, the control activates the “L Limit Reached”
Alert.
If the Screen Timeout period expires as defined by Screen
t.o., the display will change to show the default display
screen set by this data item. The following display screens
are available: <METER> (default), TapContr (switch position), Vld (load bushing voltage), Vcomp (compensated
voltage at load center), Ild (load current), and Total Ops.
The first keypress made after a control has timed out will
change the screen back to <METER>.
The Comm Auto Inhibit data item provides a way to
change the state of the Auto Inhibit status at the control
panel. This can be used if the Auto Inhibit state is turned
on remotely and the communications link goes down; in
this event, someone can go to the controls location and
enable automatic operation again.
4.3.37 Lower LED
The R Limit/L Limit settings are always used for alerting—
these limit settings only prevent tap raise/lower operations
from exceeding the limits if Soft Variamp setting is turned
ON.
In the MJ-4A and MJ-4B panels, the Raise and Lower
LEDs have been combined to one single LED. When lowering the Tap position the user may chose to have the LED
glow solid or blink by chosing the setting. The Raising of
the tap position will be indicated by the LED glowing
solid,The default setting for the Lower LED is solid.
4.3.31 Slave-Master
4.3.38 P2 Calc
The Slave-Master data item defines how to place controls
in locked-step with each other. Whenever the Master
makes a tap change it tells the slave to make a matching
tap change and waits for it to do so. Contact your Siemens
representative for information about this custom application.
P2 Calculation can be enabled or disabled from the P2
Calc screen. P2 Calculation should be enabled for regulators that have no PT. For regulators with voltages on both
the Load and Source bushing, the P2 calculation may be
disabled, so that when the sensing fuse is blown that voltage in the meter menu will be indicated by dashes.The
defualt is for P2 Calculation to be enabled.
4.3.32 Tap Alert
The Tap Alert data item enables or disables all tap alerts,
including: R Limit Reached, L Limit Reached, Neut Sig Err,
Tap Pos ???, and Tap Track Err.
4.3.33 Alrt M=? C=? S=?
The Alrt data item permits groups of alerts to be turned off
and on. Metering (M) alerts include Low Current, Low PT
Thresh, Over Current, and High Voltage. Control (C) alerts
include Auto Inhibit, Pseudo Manual, and Not in Auto. System (S) alerts include NV RAM Reset, Low Battery, and
Self Test Fault. Press change and use the left/right and up/
down arrows to adjust the M, C, and S alert settings.
26
4.3.39 U2/P2 Out
When measured with a multi-meter, the Load Voltage(unscaled) terminals on the front panel have been
locked to show the Load side voltage by default. The load
voltage will vary depending on the user defined power
flow mode and the power flow direction. The terminals
may be locked to show exclusively U2 or P2 only, or the
terminals can be configured to toggle between the two
voltages with successive key presses of the U2 P2 Key.
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4 Setting Up the MJ-4A & MJ-4B Control Panel
4.3.40 Current Bias
The user may choose None, Fwd, Rev or NeutT for current
flow modes. The Bias percent is selected from the following Bias % data item.
4.3.41 Bias Percent
The minimum Bias percent is 0% and the maximum is
10%. The user may chose to use any value between the
maximum and minimum in increments of 1%. This functionality is only in effect when the power flow mode is BiDirectional and Current Bias is not selected as “None”.
Note that, the Bias percent must be greater than the I
Threshold %. Typically, I Threhold % should be set to 0%.
For a detailed description, see Section 6.5.3
4.3.42 Remote Btn
The functionality of the Remote / Local button can be
enabled or disabled from this screen. When Enabled,
pressing the Remote/Local button will cause the control to
function as described in Section 6.1; when set to Disabled, the control can enter the Manual, Off, or AutoRemote modes. The Auto-Local mode is disabled.
This Feature is not available in the MJ-4B Panel, if a user
attempts to change the setting on a MJ-4B, the display
would show “N/A IN MJ4B”
.
Siemens Energy, Inc.
27
4 Setting Up the MJ-4A & MJ-4B Control Panel
4.4
Setting Control Levels—
the <REGULATOR> Menu
MJ-4 Control Panel when operating in Automatic Mode.
Variables in the <REGULATOR> Menu are summarized in
Table 4.3 and described in detail in the following sections.
The <REGULATOR> Menu defines setpoints used by the
Table 4.3
The <REGULATOR> Menu
DATA ITEM
DESCRIPTION
VALID INPUTS
DEFAULT
INCREMENTS
Forward power flow
Fwd Volts
Voltage setpoint level
106.0 to 134.0
120.0
0.1 Volt
Fwd BW
Bandwidth setpoint
1.0 to 6.0
2.0
0.5 Volt
Fwd Delay
Time delay setpoint
10 to 180
45
1 Second
Fwd Comp(R)
Voltage compensation (Resistive)
- 24 to + 24
0
1 volt
Fwd Comp(X)
Voltage compensation (Reactive)
- 24 to + 24
0
1 Volt
Rev Volts
Voltage setpoint level
106.0 to 134.0
120
0.1 Volt
Rev BW
Bandwidth setpoint
1.0 to 6.0
2.0
0.5 Volt
Rev Delay
Time delay setpoint
10 to 180
45
1 Second
Rev Comp(R)
Voltage compensation (Resistive)
- 24 to + 24.
0
1 volt
Rev Comp(X)
Voltage compensation (Reactive)
- 24 to + 24
0
1 Volt
VRC Stat*
Present VRC % reduction
0.0 to 10.0
---
---
VRC Mode:
Voltage Reduction Control mode
OFF, LOCAL, REMOTE, AUTO
OFF
---
Alt Delay
Alternate time delay for voltage reduction
1 to 180
5
1 Second
Reverse power flow
Voltage Reduction Control
VRC Input Special Applications
VRC1 In
VRC1 contact configuration
VRC, X-COMP
VRC
---
VRC2 In
VRC2 contact configuration
VRC, ALTDELAY, LO XBATT,
AUTO INH
VRC
---
LOCAL VRC%
Local mode VRC percent reduction
0
0.1%
VRC Stage 1
First stage % reduction
0.0 to 10.0
0
0.1%
VRC Stage 2
Second stage % reduction
0.0 to 10.0
0
0.1%
VRC Stage 3
Third stage % reduction
0.0 to 10.0
0
0.1%
VRC Remote
MJ-X or MJ-3A emulation mode
MJ-X
---
MJ-3A VRC%
MJ-3A % reduction
0
0.1%
VRC: Local Mode
0.0 to 10.0
VRC: MJ-X remote mode
VRC: Remote Mode
MJ-X or MJ-3A
VRC: MJ-3A remote mode
0.0 to 10.0
VRC: Automatic mode
AutoVRC set1
VRC setting #1 for Auto VRC
0.0 to 10.0
0
0.1%
AutoVRC set2
VRC setting #2 for Auto VRC
0.0 to 10.0
0
0.1%
AutoVRC1 %I
% Load current #1 for Auto VRC
20 to 150
150
1%
AutoVRC2 %I
% Load current #2 for Auto VRC
20 to 150
150
1%
VLC Enable
Voltage Limit Control
OFF, ON
OFF
---
VLC Upper
Upper limit
106.0 to 134.0
134.0
0.1 V
VLC Lower
Lower limit
106.0 to 134.0
106.0
0.1 V
Voltage Limit Control
*VRC Stat is a view-only item. It appears in the <REGULATOR> menu for viewing convenience.
28
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4 Setting Up the MJ-4A & MJ-4B Control Panel
4.4.1
Regulator Setpoints
Time Delay Setpoint
Regulator setpoints define the operating limits for Automatic mode operation. Two sets of limits are maintained:
one for forward power flow conditions and another for
reverse power flow conditions.
The Time Delay setpoint defines the amount of time the
controller will wait before commanding a tap change.
Voltage Level Setpoint
The Line Drop Compensation (LDC) data item defines the
assumed voltage drop between the regulator and the load
center. Settings are expressed in volts.
The Voltage Level setpoint defines the nominal level you
wish the regulator to maintain.
Bandwidth Setpoint
The Bandwidth setpoint defines the voltage range within
which the regulator output is maintained. It is divided
equally above and below the Voltage Level setpoint.
For example, a Bandwidth of 6 volts with a Voltage Level
setpoint of 120.0 volts specifies that any load voltage
between 117 volts and 123 volts is “in band.”
VRC Mode:OFF
Line Drop Compensation
To specify LDC values, view Fwd Comp (R) for the Forward Resistive component and Fwd Comp (X) for the Forward Reactive component. In systems with reverse
power flow, view Rev Comp (R) and Rev Comp (X) to
specify the Reverse components.
A Line Drop Calculator software application is available on
the Siemens website. This application automatically calculates the LDC values when the system parameters are
entered.
VRC Mode:Remote
VRC Mode:Local
Local VRC%:XX.X
4.4.2
VRC Mode:Aut/Rem
VRC Remote:MJ3A
VRC Remote:MJ-X
AutoVRCset1:XX.X
AutoVRC1 %I:XX.X
MJ-3A VRC%XX.X
VRC Stage1:XX.X
AutoVRCset2:XX.X
AutoVRC2 %I:XX.X
VRC Stage2:XX.X
VRC Stage3:XX.X
Figure 4.5
4.4.3
Flow Chart of VRC Modes
Voltage Reduction Control Items
Voltage Reduction Control (VRC) is used to reduce output
voltage. When activated, VRC has the effect of lowering
the Voltage Level setpoint. Voltage reduction is accomplished in one or more discrete steps which are defined as
a percentage of the voltage level setpoint (Fwd Volts, Rev
Volts). VRC operates immediately to reduce output voltage without waiting for completion of the Time Delay.
The following sections describe each of the VRC menu
items, and explain how to set them.
ALT Delay
When the VRC2 In item is set for ALT DELAY, an alternate
time delay is used before commanding a tap change when
the VRC2 contacts are closed. When the VRC2 contacts
are open, the standard (Fwd Delay) time delay is used.
VRC Status
The VRC Status data item displays present VRC information in the display panel. It can be directly accessed with
the VRC fast-path key, or viewed from the <REGULATOR> Menu.
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Information displayed includes: percent reduction presently in effect (nn.n%), the VRC mode (L - Local, A - Automatic, R - Remote), and the present step/stage (0-3). For
example, if VRC is presently at 5%, Remote, and MJ-X
mode Stage 3, the display panel would show VRC Stat
=05.0%R3.
VRC1 In
This item defines which feature is implemented when the
external terminal block contacts (VRC1) are closed. Select
VRC to enable remote Voltage Reduction Control. Choose
X-COMP to enable reactive compensation polarity control.
When VRC1 contacts are closed, the LDC polarity is
reversed.
VRC2 In
This item defines which feature is implemented when the
VRC2 contacts are closed. Choose VRC to enable remote
Voltage Reduction Control. Choose ALTDELAY to use the
ALT Delay feature described above. Choose LO XBATT to
use these terminals for monitoring status change (close to
open or vice versa). Choose AUTO INH to inhibit the processor from making automatic tap changes.
29
4 Setting Up the MJ-4A & MJ-4B Control Panel
VRC Mode
MJ-3A Mode (“Pulsed” Input)
This data item defines the VRC mode of operation. Select
the desired mode, using the VRC Mode data item. Four
options are provided: OFF, LOCAL, REMOTE, and AUTO/
REM (see Figure 4.4).
This mode simulates MJ-3A VRC; it uses only one external contact(VRC1). MJ-3A VRC users can achieve compatibility with existing controllers using this mode.
VRC Mode: OFF
Disables VRC function.
VRC Mode: LOCAL
When Local mode is selected, VRC activates immediately
to reduce output voltage by the amount specified in the
Local VRC % data item.
To enable VRC Local mode, view VRC Mode and select
LOCAL. View Local VRC % and define a reduction amount
between 0.0% and 10.0% in 0.1% increments.
VRC Mode: REMOTE (via Terminal Contacts)
To use MJ-3A mode, view VRC Remote and select MJ-3A.
Then select MJ-3A VRC% and specify the reduction value.
The single MJ-3A VRC% value defines a total reduction
value which control program logic subdivides into 33%,
67% and 100% steps.
To achieve a reduction equal to 100% of the MJ-3A VRC%
specification, activate the VRC1 contact for more than
three seconds (“latched”). To achieve partial voltage
reduction, “pulse” the VRC1 contact momentarily (a
“pulse” is 300 msec. to 3 seconds). See Table 4.5 below.
Table 4.5
When this mode is selected, VRC is conditioned to activate VRC upon closure of external contacts. These contacts, which specify the reduction amount, are connected
to terminals (labeled VRC1 and VRC2) at the rear of the
controller. See Appendixes I and K.
Note that VRC Mode: Remote works differently than VRC
Mode: Local. When you enable VRC Mode: Local, voltage
reduction begins immediately. When you enable VRC
Mode: Remote, the microprocessor is only conditioned to
activate VRC. Voltage reduction does not occur until the
VRC contacts are activated.
To enable VRC Remote mode, view VRC Mode and select
REMOTE. Then to activate voltage reduction, you must
close the appropriate VRC contacts.
Remote mode is further subdivided into MJ-X mode, and
MJ-3A mode (compatible with the previous-generation
control). Both modes use the VRC terminal pairs; the difference is in the way the terminal pairs are used.
MJ-X Mode (“Static” Inputs)
In MJ-X mode, you can specify up to three Stages of voltage reduction—each with a different reduction value. View
VRC Remote and select MJ-X. Then view VRC Stage1,
VRC Stage2, and VRC Stage3 to set the VRC percentage
reduction values.
Two terminal pairs (VRC1 and VRC2) on the external terminal block are used to trigger the three Stages (see Table
4.4).
Table 4.4 VRC Indicator Flashing Pattern for MJ-X Mode
30
Stage
VRC Terminal
Pairs
VRC LED flashing
pattern
Stage 1
VRC1 active;
VRC2 in-active
long-short
Stage 2
VRC1 in-active;
VRC2 active
long-short-short
Stage 3
VRC1 active;
VRC2 active
long-short-shortshort
MJ-3A Mode VRC Reduction
VRC1
Terminal Pair
VRC
Reduction
VRC LED flashing
pattern
first pulse
33% of
specified value
long-short
second pulse
67% of
specified value
long-short-short
third pulse
100% of
specified value
long-short-short-short
fourth pulse
0%
not flashing
latched
100% of
specified value
long-short-short-short
unlatched
none
none
For example, if you specify Fwd Volts=120 V, and MJ-3A
VRC% = 10%, the total reduction value is 12 V. This 12 V
reduction value is further subdivided into thirds, so a single pulse would result in a 4 V reduction; a second pulse
would produce an 8 V reduction, and a third pulse would
produce a total of 12 V reduction. Contact activation of
three seconds or longer is considered to be a “latched
condition” and would (in this example) produce a full 12 V
reduction.
Automatic Mode VRC with Remote Override
In Automatic mode, voltage reduction is activated automatically whenever load current exceeds a predefined percentage.
There are two automatic VRC setpoints (AutoVRC1 and
AutoVRC2). When load current exceeds the percentage
specified in either of the AutoVRC %I data items, regulator output voltage is reduced by the percentage specified
in the corresponding AutoVRCset data item.
Only one set is active at a time; they are not additive.
AutoVRC remains active until the load current falls below a
value that is the lower of:
AutoVRCn% · (1-2 · AutoVRCsetn(%))
or
Siemens Energy, Inc.
4 Setting Up the MJ-4A & MJ-4B Control Panel
90% · AutoVRCn% · (rated current).
4.5
Example 1
AutoVRC1%I = 60%; AutoVRCset1 = 3%.
I turn-off threshold = lower of:
60% · (1-2 · (3%)) · rated current = 56.4% · rated current
or
90% · (60%) · rated current = 54% · rated current
Auto VRC will remain active until load current drops to
54% of rated current.
Example 2
AutoVRC1%I = 80%; AutoVRCset1 = 7%.
I turn-off threshold = lower of:
80% · (1-2 · (7%)) · rated current = 68.8% · rated current
Activating Data Logging—
the <LOG SETUP> Menu
The MJ-4 Control Panel can record status information that
will help reconstruct past occurrences. Two logs are maintained: an Event Log, and an Interval Log. Event Log
records are stored when predefined Events occur; Interval
Log records are stored at predefined time intervals. See
Table 4.6; default settings are in bold.
This section describes how to define your logging requirements. See Chapter 5, Reading and Interpreting MJ-4
Control Panel Data, for guidance on how to retrieve logged
data.
Table 4.6
The <LOG SETUP> Menu
DATA ITEM
Auto VRC will remain active until load current drops to
68.8% of rated current.
To choose Automatic mode VRC, view VRC Mode and
select AUT/REM. Use AutoVRCset1 and AutoVRCset2 to
specify the reduction amount. Use AutoVRC1 %I and
AutoVRC 2%I to specify the low current threshold.
VALID INPUT
Enable event logging
On or OFF
Event = Tap
Define Tap Change
as event
On or OFF
Event = Neut.
Define Tap at neutral
as event
On or OFF
Event = NN R
Define Tap raise to
step NN as event
On or OFF NN=16
Event = NN L
Define Tap lower to
step NN as event
On or OFF NN=16
Event = VLC
Define VLC activation as event
On or OFF
Event = VRC
Define VRC as event
On or OFF
Event = PwrFlow
Define power flow
reversal as event
On or OFF
Event = PwrCyc
Define system
power up as event
On or OFF
or
90% · (80%) · rated current = 72% · rated current
DESCRIPTION
Log Event
Event = Cfg
Define configuration
change as event
On or OFF
AutoVRC settings are overridden by contact closures on
terminal block contacts VRC1 and VRC2.
Event = Alert
Define any Alert activation as event
On or OFF
4.4.4
Clr Event Log?
Clear All Event Data
Y or N
Clr IntervLog?
Clear All Interval
Data
Y or N
Log Interval
Enable Interval logging
On or OFF
ResLogMinMax
Reset min/max values at start of interval
On or OFF
Log min/max
Panel will log Instantaneous or Demand
Min/Max values
Inst, Dmd
Interval
Logging Interval
NNhrNNmin
Voltage Limit Control
Voltage Limit Control (VLC) defines limits for load voltage.
When VLC is active, the microprocessor compares load
voltage with VLC setpoints. If load voltage changes to a
value above VLC Upper, or below VLC Lower, limiting
occurs immediately —that is, without waiting for the Time
Delay timer to count down. The appropriate LED indicator
(VLC Upper/VLC Lower) illuminates to alert the operator
that Voltage Limiting is in effect.
•
To activate/deactivate VLC, view VLC Enable; then
use ON or OFF.
•
To set the Upper VLC setpoint, view VLC Upper; then
enter a value between 106.0 and 134.0 volts.
•
To set the Lower VLC setpoint, view VLC Lower; then
enter a value between 106.0 and 134.0 volts.
Note that the upper and lower limits must not overlap. For
example, if VLC Lower is 115, VLC Upper cannot be
changed to a value less than 115 V.)
4.5.1
Event Logging
The Event Log captures present readings when an Event
occurs. You can determine which Events cause logging
activity by selecting the ones you want from the <LOG
SETUP> Menu. When that Event occurs, the following
readings will be logged:
Event Date and Time,
Event Cause,
Event ID
plus present values for:
Vld,
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Ild,
31
4 Setting Up the MJ-4A & MJ-4B Control Panel
Power Factor,
Tap position,
Power (KW, KVAR, KVA),
Vsrc
To activate Events Logging, view Log Event; then select
ON. You must also define which events are to be logged.
To activate logging for a specific Event, view the appropriate Event = data item, and select ON for that Event.
The Event logs contain the 1000 most recent events.
4.5.2
Interval Logging
The Interval Log records data at specific time intervals, as
defined in the <LOG SETUP> Menu. At the end of each
interval, the following readings are logged:
4.6
MJ-4 security allows unrestricted read access to any data
item while providing password security against changes
and resets.
4.6.1
1.
A Level 1 password enables the change/reset function; if a valid Level 1 password is entered, any data
item (which is not further protected by Level 2) can
be changed or reset.
2.
A Level 2 password is associated with a specific
Menu. When a Menu is protected at Level 2, the
Level 2 password must be entered before changes/
resets can be made to data items within that Menu.
Present, max, min, and demand values for:
Ild
KVAR
Instantaneous value of Vsrc
Instantaneous value of Power Factor
Power Factor at KVAmax
Power Factor at KVAmin
Present, max, and min values for Tap Position
Total Operations
To activate Interval logging, view Log Interval; then select
ON.
Overview
MJ-4 password protection is a hierarchical system, consisting of a “System Key” that provides a level of protection for the security system itself, and two Levels of
security for MJ-4 data items:
Interval Date, Time, and Interval ID
Vld
KW
KVA
Password Security Protection—
the <PASSWORD> Menu
Entering any Level 2 password provides access to all Level
1 protected data items as well as to data items contained
in Menus that are protected by that specific Level 2 password. In other words, when a Level 2 (Menu) password
has been entered, the change/reset function is enabled for
any data item that is not protected by another Level 2
password.
Either Level can be activated independent of the other.
To define the time between logs, view Interval; then specify the time as HHhrMMmin.
Security activation and password assignment are separate
functions. In other words, even though you have assigned
a password to a Level, password checking can be active or
inactive for that Level.
To reset the minimum and maximum values at the start of
each interval, view ResLogMinMax; then select ON.
With this flexible structure you can set up a security system with:
Interval logging is synchronized to the time of day. Interval
logging occurs when “seconds” is zero. For 15 and 30
minute intervals, the MJ-4 logs data at even quarter and
half-hour increments, respectively. For a 1-hour setting,
the MJ-4 logs data on the hour. For 4 and 6-hour settings,
the MJ-4 logs data synchronized to 12:00:00 midnight.
•
A single Level 1 password.
•
A Level 1 password with additional Level 2 passwords for specific Menus.
•
No Level 1 password, but one or more level 2 (Menu)
passwords.
•
No passwords at all.
•
Passwords defined, but password checking temporarily disabled.
The Interval logs contain the 1000 most recent intervals.
4.5.3
Clearing Event/Interval Log Data
To clear the entire Event Log, view the Clr Event Log item,
toggle to Y, then press the Save key.
To clear the entire Interval Log, view the Clr IntervLog
item, toggle to Y, then press the Save key.
The default configuration for the password security system is with all password protection disabled (except for
the <DIAGNOSTIC> Menu).
Control of the security system requires the use of a “System Key,” which protects the changing of passwords and
the activation and de-activation of the two security Levels.
To ensure proper control of the MJ-4 security system, you
may wish to designate one individual as security adminis-
32
Siemens Energy, Inc.
4 Setting Up the MJ-4A & MJ-4B Control Panel
trator. This person would be responsible for establishing
the password protection scheme and for making changes
to the passwords as necessary; He/she would be the only
individual requiring knowledge of the “System Key.” The
“System Key” not only allows the user to change the
security system, it also acts as a top level password which
allows access to all change/reset functions. Once the
“System Key” is entered and until the session is ended,
the security system is effectively disabled.
Contact a Siemens representative if your passwords are
forgotten.
Table 4.7
4.6.2
The <PASSWORD> Menu
The <PASSWORD> Menu serves three purposes:
1.
To enter passwords so that you can change/reset
password-protected data items.
2.
To define passwords.
3.
To activate and de-activate security checking.
Table 4.7 below describes the data items in the <PASSWORD> Menu and their default settings.
The <PASSWORD> Menu
Data item
Description
Value
The following data items are used to enter passwords
Enter PW:
Prompts operator for a password
End Session ?
End password access to protected data items
xxxx
System Key:
Prompt for entering and changing of the System Key
N or Y
xxxx 0123
The following data items are visible only after System Key has been accepted.
Level 1
Level 1:
Level 1 PW:
OFF or ON
Enable Level 1?
Level 1 password
xxxx 1111
Level 2
Configure:
Enable password for <CONFIGURE> Menu changes
OFF or ON
Config PW:
Password for <CONFIGURE> Menu
xxxx 2222
Regulator:
Enable password for <REGULATOR> Menu changes
OFF or ON
Reg. PW:
Password for <REGULATOR> Menu
xxxx 2222
Enable password for <METER> Menu changes
OFF or ON
Password for <METER> Menu
xxxx 2222
Meter:
Meter PW:
Demand:
Demand PW:
Alert:
Alert PW:
Counters:
Counters PW:
Log Setup:
Log Set PW:
Enable password for <DEMAND> Menu changes
OFF or ON
Password for <DEMAND> Menu
xxxx 2222
Enable password for <ALERTS> Menu changes
OFF or ON
Password for <ALERTS> Menu
xxxx 2222
Enable password for <COUNTERS> Menu changes
OFF or ON
Password for <COUNTERS> Menu
xxxx 2222
Enable password for <LOG SETUP. Menu changes.
OFF or ON
Password for <LOG SETUP> Menu
xxxx 2222
Enable password for <EVENT LOG> and <INTERVAL LOG> Menus.
OFF or ON
Password for <EVENT/INTERVA>L
xxxx 2222
Harmonics:
Enable password for <HARMONICS> Menu.
OFF or ON
Harm. PW:
Password for <HARMONICS> Menu
xxxx 2222
Enable password for <COMMUNICATIONS> Menu.
OFF or ON
Password for <COMMUNICATIONS> Menu
xxxx 2222
Ev/Intv:
Ev/Intv PW:
Comm:
Comm PW:
Mntn
Mntn PW
Enable password for <MAINTENANCE> Menu
ON or Off
Password for <MAINTENANCE> Menu
xxxx 3333
Diagnostics:
Enable password for <DIAGNOSTICS> Menu.
ON or Off
Diagnos. PW:
Password for <DIAGNOSTICS> Menu
xxxx 3333
Bold denotes default values
Siemens Energy, Inc.
33
4 Setting Up the MJ-4A & MJ-4B Control Panel
4.6.3
Setting Up the MJ-4A & MJ-4B Security
System.
Entering the System Key
To make changes to the security system itself, a “System
Key” must first be entered. The System Key is a special
password that allows the security administrator to change
passwords and to enable/disable Level 1 and Level 2 protection.
To enter the System Key, view the System Key xxxx data
item from the <PASSWORD> Menu; then press Change.
The display screen responds by flashing “„” in the leftmost position of the four-character password field. This
denotes the position in which a character is to be entered.
(The remaining character positions contain “„.”) Use the
¿ and À keys to select the desired character. Then press
the ¾ key to move the cursor to the next character to the
right, and so on, until all four characters of the password
have been entered. To complete the process, press the
Save key.
When a valid System Key has been entered, “Sys Key
Accepted” appears in the display screen. Re-definition of
the security system is then possible. Access to security
system re-definition continues until the definition session
is:
In addition to defining passwords for a given level, you
must also enable that level before password checking
takes place. When password checking is enabled for a
given Level, entry of a valid password will be required
before you can change/reset any data item that is protected at that Level. Password checking is enabled for
each level separately. In other words, you can enable or
disable password protection for Level 1, for Level 2, or for
both Levels. If password checking for a given Level is disabled, any data item at that Level can be changed or reset
without use of the password.
To activate password checking for Level 1, view the Level 1
parameter; then change the OFF to ON.
To activate password checking for Level 2, you must specify each Menu for which you wish security to be enabled.
For example, to enable Level 2 security for the <CONFIGURE> Menu, view CONFIGURE: from the <PASSWORD> Menu; then change the OFF to ON.
Changing the System Key
To change the System Key, (assuming you have not yet
entered the System Key):
1.
Enter the present System Key. After all four characters have been selected, press Save. The words “Sys
Key Accepted” will appear in the display screen. After
a short period, the words “System Key” will be displayed.
•
Manually terminated by selection of End Session
Y(es) in the <PASSWORD> Menu.
•
Automatically terminated by expiration of the Screen
timeout period.
2.
Press the Change key to indicate that you wish to
make a change.
Because of the security exposure possible during a security system definition session, you should always use the
End Session facility when changes are complete to ensure
against unauthorized security system re-definition
changes.
3.
Enter the new key. After all four characters have been
selected, press Save. The words, “Re-enter xxxx”
will appear.
4.
Verify correct entry by entering the new System Key
once again. After all four characters have been
selected, press Save.
Changing Passwords
After entering the System Key (see above), scroll down to
view Password and Password Enable/Disable items.
To change a Level 1 password, view Level 1 PW: in the
<PASSWORD> Menu and use the Change, Scroll, and
Save keys to enter the new password. Passwords may
consist of any of the following characters: 0-9 and A-Z.
To change a Level 2 password, you must view the Menu
associated with that password from the <PASSWORD>
Menu. For example, to define a password for the <CONFIGURE> Menu view Config. PW;, then use the Change,
Scroll, and Save keys to enter the new password. You may
use the same Level 2 password for several Menus, or you
may use a different Level 2 password for each Menu.
Enabling/Disabling Password Checking
After entering the System Key (see above), scroll down to
view Password and Password Enable/Disable items.
34
If your first and second attempts do not match, you will
see the words, “Verify failure” and you will be returned to
step 2. When you have successfully entered the new System Key twice in succession, the display screen responds
with “Sys Key Changed.”
4.6.4
Using the MJ-4A & MJ-4B Control Panel
With Password Security Activated
MJ-4 Security does not restrict data reading. However, if
password security is active, you must first enter the
proper password before you can change or reset protected data. If you attempt to change a password-protected item without first entering the proper password,
the display screen responds “PW NOT ENTERED” and
you must use the <PASSWORD> Menu to enter the
appropriate password.
Note that a Level 2 password includes Level 1 access privileges. Therefore, data items that are only Level 1 protected can be changed or reset after you enter either the
Siemens Energy, Inc.
4 Setting Up the MJ-4A & MJ-4B Control Panel
Level 1 password or a Level 2 password. Data items contained in Menus that are password protected by Level 2
passwords can only be changed or reset after you enter
the Level 2 password for that Menu.
Entering passwords
You can go directly to the <PASSWORD> menu and enter
the password(s) you want, or when viewing a specific
menu item, press Cancel/Reset or Change. If password
protection is enabled for this menu, you are prompted to
enter the password. (If you see the password prompt, skip
step 1 below.)
1.
Use the Menu and Scroll keys to view the <PASSWORD> Menu. Press the À key. The display screen
responds: “Enter PW xxxx”.
2.
Press the Change key. The display screen responds
by flashing “„” in the leftmost position of the four
character password field. This represents the character to be entered.
3.
Use the ¿ and À keys to step through the alpha and
numeric characters until the desired character is presented in the display screen.
4.
Press the ¾ key to move the cursor to the next character to the right, and so on until all four characters of
the password have been entered.
5.
When you have completed entering the password,
press the Save key.
(If you started in the <PASSWORD> menu, go to step 6.
Otherwise, go to step 7.)
6.
7.
If you entered a valid password, the MJ-4 briefly displays “PW Accepted”
, and then displays “Enter PW”.
This allows you to enter additional passwords. (You
may wish to enter additional passwords if, for example, you have enabled both Level 1 and Level 2; or if
you have enabled Level 2 and have different passwords for each Menu.) When you have entered all
passwords, you can use the Menu and Scroll keys to
view the data item(s) you wish to change or reset.
Skip step 7.
If you enter the correct password, the MJ-4 briefly
displays, “PW Accepted” and then returns to the
screen you were viewing when you started this process. If you enter a valid password, but not the correct password for this menu, the MJ-4 displays
“Enter PW:” again. This process repeats until you
enter the correct password for this menu.
Once a password has been accepted, changes and resets
are permitted for the remainder of the session. To end the
session, view End Session in the <PASSWORD> Menu,
and use the Change, Scroll, and Save keys to change the
default N(o) to Y(es). If you leave the session enabled
(un-terminated) the MJ-4 automatically terminates it when
the screen time-out period expires (see <CONFIGURE>
Menu Screen t.o. data item).
Siemens Energy, Inc.
4.7
Communications Definition—
the <COMMUNICATIONS> Menu
The <COMMUNICATIONS> Menu provides data items
for setting up local communications and remote communications via the Communications Module. These data
items are described in the following sections.
4.7.1
Setting Up the Local Data Port
The Local Data Port must be set up for proper operation.
The <COMMUNICATIONS> Menu contains the Data Port
setup items described in Table 4.8:
Table 4.8 <COMMUNICATIONS> Menu Setup Data
Items
DATA ITEM
DESCRIPTION
INPUTS
DatPortBaud:
Local Data Port
transmission rate
300, 1200, 2400,
4800, 9600, or
19200
Data Parity:
Local Data Port Parity Setting
EVEN, NONE
DataPorAddr:
Enables/Disables
Addressing for
Data Port
OFF, ON
Reg Id:
Regulator Identification Number
(Note that this is
NOT the address
for Data Port Communications.)
NNNNN
2200 protocol
address for the
specific unit
NNN
(Range 0-255
See Table 4.8)
Comm Addr:
(Range 0-32765)
Note: Default values shown in bold type.
To change the baud rate for the data port, view DatPortBaud under the <COMMUNICATIONS> Menu and select
one of the options (300, 600, 1200, 4800, 9600, or
19,200).
To change the parity for the data port, view Data Parity
under the <COMMUNICATIONS> Menu and select one
of the options (EVEN or NONE).
To enable or disable addressing for the data port, view
DataPortAddr under the <COMMUNICATIONS> Menu
and select one of the options (OFF or ON.) Disable
addressing for local communications with MJXplorer or a
Data Reader.
To change the Regulator Identification, view Reg Id under
the <COMMUNICATIONS> Menu and set the desired
Reg Id value. For extracting data and generating reports
using the MJXplorer software, the Reg Id value appears
prominently at the top of the reports. If collecting data
from multiple controls, select a different value of Reg Id
for each MJ-4 unit.
To set the Communications unit address, view Comm
Addr under the <COMMUNICATIONS> Menu. Enter the
desired address.
35
4 Setting Up the MJ-4A & MJ-4B Control Panel
The “Comm Addr” screen shows the communications
address for the MJ-4 unit. For the Data Port, the usable
address ranges are listed in Table 4.9 below. Note that the
MJ-4 is device type “1”, and its group address is 254.
Table 4.9
Table 4.10 Communications Module Configuration Items
Data Port Addresses
DATA ITEM
DESCRIPTION
SELECTIONS
Protocol:
Communications
Module Protocol
DNP3.0, 2200,
2200NOA,
MJ3A A,
MJ3A B1,
MJ3A B2, 2179,
and Special
Address
Range
Function
0
Wild Card
Address
All controls on system respond.
1 to 200
Unique Device
Address
When an address in this range is
sent, only the control that has
that unique address responds.
Comm Baud:
Communications
Module transmission
rate
300, 1200, 2400,
4800, 9600, or
19,200*
201 to 254
Device Type,
Group Address
Any control with the corresponding group address (which is
determined by the control’s
device type) receive and execute
commands with no return
response.
Comm Parity:
Communications
Module Parity
NONE, EVEN,
ODD
Comm Addr:
Communications
Module Address
NNNNN
(range: 0 - 32765)
Resync Time:
Communications
Module resync time (in
characters). Used for
Communications Module protocols 2200 and
2179 to determine
when one message
ends and another message begins.
NNN
(range 0-250,
1)
Tx En Delay:
Communications
Module Transmit Enable
Delay (in
milliseconds).
Specifies the amount of
time between the RTS
output being
activated and the start
of transmit (output)
data.
NNN
(range 0-250)
DNP dl Confirm
DNP Data Link Confirm
Y or N
CM SW
RepeatEn
Enable software autorepeat in Comm
Module (MJ-3A
protocol only)
Y or N
Host Addr
Host Address for
Unsolicited Responses
NNN
(range 0-65535)
CM Unsolicited
Unsolicited Responses
Y or N
AutoInhEnRemRL
Auto Inhibit Enables
Remote Raise/Lower
Y or N
DNPset
select a predefined or
custom DNP point set
DNPcfg, 2.x3,
2.x4, etc.
CM Vers
Comm Module software version
N.NNNN
255
4.7.2
Broadcast
Address
How Used
All controls on the system
receive and execute commands,
with no return response.
Using the Communications Module
The Communications Module provides remote communications capability for the MJ-4 Control Panel. The Communications Module is a plug-in option offering choices of
communications protocols and physical interfaces. Since
the Communications Module Installation Manual
describes the configuration items in detail, they are listed
only for reference in Table 4.10
Note: Default values shown in bold type.
Note: If both the Data Port and the Communications
Module are simultaneously set up for remote
communications, then the Data Port restrictions on the value of the “Comm Addr” data
item must apply.
*
36
See Comm Module Instruction Manual for limitations
on 19,200 baud.
Siemens Energy, Inc.
4 Setting Up the MJ-4A & MJ-4B Control Panel
4.8
Regulator Maintenance—
the <MAINTENANCE> Menu
The information contained within the <MAINTENANCE>
menu should be used for information purposes only. All
voltage regulator maintenance should be completed as
described in the Maintenance section of the Siemens Voltage Regulator Manual.
The <MAINTENANCE> Menu allows the user to enable
an algorithm which will approximate wear and tear on the
Tap changer contacts for Siemens Regulators. The menu
allows the user to chose a Tap Changer Type, indicate
presence of Balance winding and define the Range of
Regulation. The other items in this menu include items
which show statuses of the Tap changer contacts, and the
operations on the contact(s).
The statuses update based on the accumulated losses
due to wear and tear. The status are classified into EXCELLENT, GOOD, WORN, and REPLACE. The Moving contacts have a common status screen while the Stationary
contacts have one screen each.
The contact op counters update as operations are added
on the individual contacts.
The first screen in the <MAINTENANCE> menu is the
ConsOv screen which is a status screen, it shows the status of the most worn contact(s).
Each of the individual contacts’ status or operations
maybe cleared by pressing the Cancel Reset button. If a
user wishes to clear all statuses and op counts at once
then this can be done by pressing Cancel-Reset key on
the ConsOv screen.
If the Maintenance approximation algorithm is disabled, all
statuses and contact op counts show “N/A”.. If the MaintainRcrds? data item is changed to “Y” then the algorithm
is enabled and would update the statuses and opcounts.
The Maintenance menu is password protected by default.
The default password of “3333” must be entered before
changing settings or resetting any statuses and contact op
counters.
The last screen in the maintenance menu is the OP_DUR
screen. This screen indicates the last measured op
counter pulse duration in seconds which is useful when
adjusting the TapInPulse time for TapIn=Pulse under
<Diagnostics> (i.e. the Tap Chgr is set to Custom or GE).
The Maintenance Menu also has a fast path key on the
front panel. Press this key to view the status and settings
screens of the Maintenance menu; repeat the key press
to scroll through the Maintenance menu.
Siemens Energy, Inc.
4.9
Hardware Configuration—
the <DIAGNOSTICS> Menu
The <DIAGNOSTICS> Menu includes the MJ-4 hardware
configuration items in addition to the calibration and MJ-4
internal test items.
See Section 8 for information about the test and calibration items:
U2 Cal
P2 Cal
C/C2low
C/C2med
C/C2high
The MJ-4 provides three hardware configuration items to
assure compatibility between the MJ-4 electronics (hardware) and the MJ-4 control program software. The hardware configuration items are listed in Table 4.11 below:
Table 4.11
Hardware Configuration Items
DATA ITEM
MP BD VERS:
PWR BD VERS:
MP MASK VERS:
DESCRIPTION
MJ-4 Main Processor Board Version
For MJ-X Compatibility.
MJ-4 Microprocessor Mask Version
The Hardware configuration items are initialized at the factory. Normally, these items will not need to be changed or
updated.
For all MJ-4 units, the “MP MASK VERS:” item is factory
set. “0C” is the default setting and the operator/installer
should not change this value.
The <DIAGNOSTICS> Menu also includes the Serial
Number and Product Revision code for the MJ-4 Control
Panel. These are set at the factory and cannot be changed.
Refer to the Communications Module Instruction Manual
for information about the Comm Module items:
CM Test?
CM TestStat
The configurable tap changer control settings are also contained in the <DIAGNOSTICS> Menu. Contact your Siemens representative for more information before adjusting
these settings.
37
4 Setting Up the MJ-4A & MJ-4B Control Panel
4.10
Setting up the Quick Key
The Quick Key provides access to the customizable Quick
List. The Quick List can be used to step through a series
of up to 15 user-set menu items. The Quick List allows
creation of a custom menu with the minimal amount of
effort. Any changes to the menu parameters must be
done using normal configuration and operation procedures. Certain menus cannot be added to the Quick List
including: Password Menu, Log Menu(s), Alert Menu.
Adding Items to the Quick List: Use the scroll keys to display the desired menu item to be added. Press the +/- key.
Press the Quick Key. Repeat to add more screens to the
Quick List. Items are stored in the order that you add
them.
Removing Items from the Quick List: Press the Quick Key
repeatedly to display the desired menu item to be
removed. Press the +/- key. Press the Quick Key. Press the
Cancel/Reset key.
Viewing the position of Items in the Quick List: Press the
Quick Key repeatedly to display the desired menu item.
Press the left arrow key to display the item’s position in
the menu stack.
Repositioning Items in the Quick List: Press the Quick Key
repeatedly until the desired item is displayed. Press the
Change Key. Press the Up and Down arrow keys to move
the item up and down one position at a time. When finished, no further key presses are necessary. Press the
Quick Key repeatedly to cycle through the new order.
Displaying Items in the Quick List: Press the Quick Key
repeatedly to step through the Quick List. The display will
flash from bright to dim to signify that the Quick List is
being displayed. When finished, press the Cancel/Reset
key to exit the Quick List, or if no keys are pressed for the
amount of time specified in the Quick t.o. data item, the
Quick List will be automatically exited.
The first keypress used to enter the Quick List will always
display the Tap Contr screen (showing switch position)
before the actual Quick List is displayed itself.
While in the Quick List, press the right arrow key to begin
a slideshow that automatically steps through the Quick
List. Each screen is displayed for the amount of time specified by the QuickDispTim data item. To stop the slideshow and exit the Quick List press the Cancel/Reset key.
38
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5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
The MJ-4 Control Panel microprocessor maintains a considerable amount of operational information—both
present and historical:
•
Meter data—instantaneous, minimum, and maximum
operational information.
•
Log data—historical meter data, recorded at specific
times.
•
Demand data—demand data, continuously updated.
•
“L” bushing voltage is the “Load voltage. With power
flowing in the reverse direction, the “S” bushing voltage is
the “Load” voltage and the “L” bushing voltage is the
“Source” voltage.
The table below shows which MJ-4 parameters represent
the “S” and “L” readings for each power-flow condition.
Table 5.1
Power Flow Mode
Vld
Vsrc
Power Flow Direction
Bi-Dir, Neut R. Idle R
“L”
“S”
Forward
Counter data—tap change history.
Bi-Dir, Neut R. Idle R
“S”
“L”
Reverse
•
Harmonics data—harmonic analysis data.
F Lock, Co-Gen
“L”
“S”
Forward
•
Communications data—Local Data Port status.
F Lock, Co-Gen
“L”
“S”
Reverse
R Lock
“S”
“L”
Forward
R Lock
“S”
“L”
Reverse
Data is available through the front-panel display screen,
the local port, or the communication port (if so-equipped).
This chapter lists the data items that are maintained by
the microprocessor, and tells you how to retrieve them.
5.1
Source and Load Definitions
In the following paragraphs, the term “Source” is defined
as the connection point from which real power is flowing.
The term “Load” refers to the connection point into which
real power is flowing. In addition, for purposes of the following discussion, U2 and P2 refer to the terminals with
the U2 and P2 labels at the MJ-4 Polarized Disconnect
Switch (which may or may not match the regulator leads
with the same labels).
For a Straight regulator, the “S” bushing potential is provided to U2 via the tertiary winding, while the “L” bushing
PT connects to P2. Under forward power flow conditions
the source voltage is read at U2 and the load voltage is
read at P2. Under reverse power flow conditions, the
source voltage is read at P2 and the load voltage is read at
U2. If no PT is present, P2 voltage is calculated, see 5.2.
For an Inverted regulator with no Source Side PT, the “L”
bushing potential is provided to U2 via the tertiary winding. Under forward power flow conditions, the load voltage is read at U2; no source voltage is available. However,
an estimated value is calculated, see the P2 Calculation
section below. Under reverse power flow conditions, the
source voltage is read at U2; no load voltage is available.
However, an estimated value is calculated, see the P2 Calculation section below.
For an Inverted regulator with a Source Side PT, the “L”
bushing potential is provided to U2 via the tertiary winding
and the “S” bushing potential is provided to P2 via the
Source Side PT. Under forward power flow conditions, the
load voltage is read at U2; the source voltage is read at
P2. Under reverse power flow conditions, the load voltage is read at P2, the source voltage is read at U2.
For applications which require regulation in reverse power
flow, users generally select the bi-directional power flow
mode. In bi-directional mode with power flowing forward,
the “S” bushing voltage is the “Source” voltage and the
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5.2
P2 Voltage Calculation
This feature provides a calculated value of the “P2” bushing voltage when a measured value is unavailable.
When the the P2 voltage reading is less than 50 volts and
the P2 Calc setting is enabled under the <ADV CONFIGURE> menu, the MJ-4 automatically calculates the P2
voltage. The MJ-4 displays the calculated P2 value as
“Vsrc” or Vld” according to Table 5.1. If the P2 Calc is disabled, then the P2 Value is not calculated.
The MJ-4 must know the tap position for the “P2 Calculate” feature to work. See sections 5.7 and 5.8 for information about the tap position and the tap position message.
5.3
Meter Data—the <METER> Menu
The Meter data items present operating values such as
Voltage, Current, Power, etc. on the display screen. Unless
otherwise specified, Meter data includes rms, maximum
and minimum values.
To view Meter data, use the Menu Selection keys to view
the <METER> Menu; then use the ¿ and À keys to
sequence through the data items.
To view a maximum or a minimum data item, you first
view the instantaneous data item and press the Max/Min
key. Pressing the Max/Min key once displays the maximum value. To view the minimum value press the Max/
Min key twice. To reset Maximum/Minimum data values,
first view the rms value, then press the Max/Min key, and
then the Cancel/Reset key.
5.3.1
Viewing Min/Max Time and Date Stamps
To view the time and date of occurrence for a minimum or
maximum data item, first view the desired min/max data
item. With the min/max data item displayed, press the
Save key to view the associated time and date stamp.
While the time and date stamp is in view, if you press the
À key, the first metered data item for the menu will be
5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
displayed. Pressing the ¿ key displays the last metered
data item. An example for displaying min/max time and
date stamps is shown below:
power flow conditions, load current includes regulator
excitation current which could be approximately 10%
higher or lower than actual load current.
Action
View Vcomp data item
in <METER> Menu.
Press Max/Min key once.
Press the Save key
before timeout.
Press the À key.
PF Lead, PF Lag (Power Factor)
5.3.2
Display Shows
Vcomp = 121.2 F
Vcomp = 124.3 Fmax
061798 21:26:45
Vld = 122.5F
Table 5.2 Meter Data Items
<METER> MENU DATA ITEMS
Ild1
PF1
KVA1
KW1
KVAR1
Freq1
KWhr2
KVARhr2
PF =
Viewing the <METER> Menu Data
Table 5.1 summarizes the <METER> Menu data items.
The remainder of the section defines the data items in
detail.
Vld1
Vs1
Vcomp1
This is the present line power factor, derived from the fundamental frequencies only, using the relationship
Measured rms regulator load voltage
Measured rms regulator source voltage
Regulator load voltage corrected for line
drop using LDC parameters
Measured rms load current
Power factor
Apparent regulator power load
Real power measured at the regulator
Reactive power measured at the regulator
Line frequency
Forward and Reverse Real energy
Forward and Reverse Reactive energy (lead
& lag)
Watts
Volts * Amps
Three values are recorded for Power Factor: instantaneous, maximum (most leading), and minimum (most lagging or least leading).
kVA (Apparent Power)
The kVA data item displays the present kVA load on the
regulator. The CT of a regulator is always located in the “L”
bushing lead. The MJ-4 calculates the kVA per Table 5.3.
Table 5.3
Regulator kVA Load
Regulator Type
Forward Power
Flow
Reverse Power
Flow
ANSI A Straight
kVA = Vld x Ild
kVA = Vs x I(“L”)
ANSI B (Inverted)
kVA = Vld x Ild
kVA = Vs x I(“L”)
1. Instantaneous, Max, and Min values
2. Time-cumulative value — no Max/Min
Note: For reverse power flow, Ild is current flowing
into the regulator and will differ from actual
load current by the amount of excitation current of the regulator.
Vld (Load Volts)
kW (Real Power)
The Vld data item displays the rms load voltage. The value
displayed is either the basis voltage (nominal 120 V) or the
system primary voltage. (See Meter Volts as defined in
the <CONFIGURE> Menu Meter Volts data item, Chapter
4.)
The Forward and Reverse kW data items display the real
portion of the present kVA load on the regulator.
Vs (Source Volts)
The Vs data item displays the rms source voltage. The
value displayed is either the basis voltage (nominal 120 V)
or the system primary voltage. (See Meter Volts in the
<CONFIGURE> Menu, Chapter 4.)
Vcomp (Line Drop Compensation Volts)
The Vcomp data item displays the rms voltage present at
the theoretical load center. This is the voltage the microprocessor compares with the voltage setpoint to determine when tap changes are required. The value displayed
is either the basis voltage (nominal 120 V) or the system
primary voltage. (See Meter Volts in the <CONFIGURE>
Menu, Chapter 4.)
Ild (Load Current)
The Ild data item displays the rms regulator current in
amperes. Note: the Current Transformer is typically
located in the Load Bushing lead. Therefore, under reverse
40
Real Power = kW =
1
n
n
Vn(t) x In(t)
1
The kW is displayed as a positive quantity when power
flow is into the load, or as a negative quantity when power
flow is into the source.
kVAR (kVAR)
The kVAR data item displays the reactive portion of the
present kVA load on the regulator.
Reactive Power = kVAR =
1
n
n
V(t) x I(t+90º)
1
+ = lagging, - = leading
Freq (Line Frequency)
The Freq data item displays the line frequency in Hertz
(present, max, min).
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5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
kWhr F and kWhr R (Forward and Reverse Real
Energy)
The Forward and Reverse kWhr data items display Kilowatt Hour values. They are accumulated separately for forward and reverse power flow conditions. kWhr is updated
once per second, using the formula:
kWHRnew = kWHRold + kW*1/3600(hours)
kVARhr F and kVARhr R (Forward and Reverse
Reactive Energy)
The kVARhr F and kVARhr R data items display Kilovar
Hour values. They are accumulated separately for forward
and reverse power flow conditions. The kVARhr is updated
once per second, using the formula:
kVARnew = kVARold + kVAR*1/3600(hours)
The microprocessor computes and accumulates kVARhr
values for each of the four quadrants of the voltage/current
phase-angle relationships. These parameters are presented as shown in Figure 5.1.
kVAR (reactive power)
kVA
-kW (reverse)
+kVAR (forward)
-PF (leading)
II
I
III
IV
+kW (forward)
+kVAR (forward)
+PF (lagging)
-kW (reverse)
kW (real power)
-kW (reverse)
-kVAR (reverse)
+PF (lagging)
Figure 5.1
5.4
+kW (forward)
-kVAR (reverse)
-PF (leading)
Power Quadrant Conventions
Demand Data—
the <DEMAND> Menus
Demand measurements are time integration functions of
the metered values. The MJ-4 Control Panel performs
demand calculations for the following data items: voltage,
current, power factor and power.
Demand data is maintained separately for forward and
reverse power flow conditions (see Table 5.4). During forward power flow conditions, the microprocessor does not
accumulate reverse measurements. During reverse power
flow conditions, the microprocessor does not accumulate
forward measurements.
You can select one of two methods of measuring demand:
the Sliding Window method and the Thermal Averaging
method. (See DmdType in Section 4.3.23.)
Vld1,2
Vs1
Fdmd
Fdmd
FdmdVcomp1
Fdmd Ild1
PFKVAmax
PFKVAmin
Fdmd KW1
FdmdKVAR1
FdmdKVA1
Load Voltage demand
Source Voltage demand
Compensated Load Voltage demand
Load Current demand
Power Factor @ max KVA
Power Factor @ min KVA
Real Power demand
Reactive Power demand
Apparent Power demand
1. Instantaneous, min and max data available
2. For each Forward Demand Data Item there is a corresponding Reverse Demand Data Item. For example, Rdmd Vld.
To retrieve Demand data, select the appropriate
<FW DEMAND> or <REV DEMAND> Menu; then use
the ¿ and À keys to sequence through the Demand data
items. To view the minimum and maximum values for a
given Demand data item, first view the present value;
then use the Max/Min key to display the respective maximum and minimum values recorded since the last reset.
Demand calculations are initialized at the time of system
power up, when configuration items are changed, and on
any power flow reversal. Un-initialized data items are presented as dashes (—) on the display screen. Demand values remain un-initialized until completion of the first
subperiod. Power factor is stored whenever a new kVA
maximum or minimum demand value is reached. These
Power Factor values are reset when kVA max or kVA min
values are reset.
5.5
Event Log - the <EVENT LOG>
Menu
The MJ-4 can be set up to record meter data at the time
of an “Event.” Events can include: power up, parameter
changes, tap changes, etc. Use the <LOG SETUP> Menu
to enable the Events you want logged. (See Section 4.5).
Table 5.5 describes the data that is to be logged whenever
an Event occurs.
Table 5.5
<EVENT LOG> Data Items
<EVENT LOG> Data items
Event:
Date:
Time:
Cause:
Vld
Vsrc
Ild
PF
KWld
KVAR
KVAld
Tap
1.
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Demand Data Items
Table 5.4
Event number1
Date
Time
Cause of Event
(Message, tap change, etc.)
rms regulator load voltage
rms regulator source voltage
rms regulator load current
Present Power Factor
Present Real power
Present Reactive power
Present Apparent power
Tap position
NNNNNNN
NN/NN/NN
NN:NN:NN
CAUSE
NNNN.N
NNNN.N
NNNN.N
N.NN
NNNNN
±NNNNN
NNNNN
NN Raise/lower
The Event number is a sequential number used for maintaining and referencing the <EVENT LOG>
5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
To access log data, view the <EVENT LOG> Menu with
the Menu Selection keys; then use the ¿ and À keys to
sequence through the log entries.
New Events that occur while Events are displayed are
saved, but not made available for viewing until you return
to the Menu level and subsequently scroll into the
<EVENT LOG> Menu again. Meter data for all of the
Events can be retrieved via the display screen on the front
panel. Data for the 200 most recent Events is stored and
can also be retrieved via the front-panel Data Port or the
Communication Port.
5.5.1
Viewing Event Data
To quickly go from viewing one Event to viewing the previous or next Event, use the ½ or ¾ keys. For example, if
the screen being viewed is [Event: 20], press the ½ key
once to view the [Event: 19] screen. From the [Event: 19]
screen, press the ¾ key once to view the [Event: 20]
screen again.
5.5.2
Clearing Individual Events from the Event
Log
Table 5.6 describes the data that is logged at the conclusion of each interval.
Table 5.6
Interval Log Data Items
INTERV:
Interval number1
DATE:
Interval date
TIME:
Interval time
Vld
Secondary2 Load voltage — rms, Max, Min, Dmd
Vsrc
Source voltage — rms
Ild
Load current — rms, Max, Min, Dmd
PF
Power Factor — Present, PFKVA max, PFKVA min
KWld
Real power — Present, Max, Min, Demand
KVAld
Apparent power — Present, Max, Min, Demand
Tap =
Tap position
Tapmax = Maximum tap position
Tapmin = Minimum tap position
Total ops = Total tap changes
1.
The Interval number is a sequential number used for maintaining and referencing the interval log.
2. Secondary only — even if PRI selected in Meter Volts data
item.
Since you can now view all of the <EVENT LOG> data
from the front panel, or download it via the data port, it is
unnecessary to delete individual <EVENT LOG> items.
The MJ-4 no longer supports deleting individual log
records. If the <EVENT LOG> memory is full, the oldest
record is overwritten when a new event occurs.
If the specified interval elapses while you are viewing
<INTERVAL LOG> data, the MJ-4 saves the new data,
but it is not available for viewing until you return to the
Menu level and subsequently scroll into the <INTERVAL
LOG> Menu again. Data for all of the Intervals can be
viewed from the <INTERVAL LOG> Menu. Data for the
800 most recent Intervals is stored and can also be
retrieved through the front-panel Data Port or the Communication Port.
5.6
5.6.1
Interval Log — the <INTERVAL
LOG> Menu
The MJ-4 Control Panel can be set up to record data at the
completion of a predefined interval of time. Use the <LOG
SETUP> Menu to define the time interval and to activate
Interval logging. (See Section 4.5).
Interval logging occurs when “seconds” is zero on the
internal clock. For certain interval period selections, interval logging is tied to the time-of-day. For 15 and 30 minute
interval settings, the MJ-4 logs data at even quarter and
half-hour increments, respectively. For a one-hour setting,
the MJ-4 logs data on the hour. For four and six-hour settings, the MJ-4 logs data synchronized to 12:00:00 midnight.
Viewing Interval Data
To quickly go from viewing one Interval to viewing the previous or next Interval, use the ½ or ¾ keys. For example,
if the screen being viewed is [Interval: 20], press the ½
key once to view the [Interval: 19] screen. From the [Interval: 19] screen, press the ¾ key once to view the [Interval: 20] screen again.
5.6.2
Clearing Individual Intervals from the
Interval Log
Since you can now view all of the <INTERVAL LOG> data
from the front panel, or download it via the data port, it is
unnecessary to delete individual <INTERVAL LOG>
items. The MJ-4 no longer supports deleting individual log
records. If the <INTERVAL LOG> memory is full, the oldest record is overwritten when a new interval log occurs.
5.6.3
Resetting Min/Max Values at Each
Interval
In <LOG SETUP>, set ResLogMinMax to ON to reset
min/max values at the start of each interval. With this feature enabled, MJ-4 logs the min/max values that occur
during each interval.
42
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5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
5.7
Operation Counter Data the <COUNTERS> Menu
Operation counters record the stepping operations of the
regulator tap changer (see Table 5.7).
Table 5.7
Total Ops
Reset
Reset
Elapsed Ops
24 HR Ops
30 Day Ops
MTD Ops
Last Month
YTD Ops
Last Year
Tap
Tap Control
Tapmax
Tapmin
Counter Data Items
The total number of tap changes2
Date of last Elapsed Ops counter reset
Time of last Elapsed Ops counter reset
Total number of tap changes since last reset1
Number of tap changes in the past 24 hours1
Number of tap changes in the past 30 days1
Number of tap changes this month1
Number of tap changes last month1
Number of tap changes this year1
Number of tap changes last year1
Present position of the tap changer1
Remote or Local based on the mode setting
Maximum tap position since last reset1, 3, 4
Minimum tap position since last reset1, 3, 4
1. To reset, use Cancel/Reset key.
2. To change value, use the Change/Scroll/Save keys.
3. Tap position is determined by the “dead reckoning” method
(see below)
4. To view, use Max/Min key.
To retrieve Tap Changer data, use the Menu Selection
keys to access the< COUNTERS> Menu; then use the ¿
and À keys to sequence through the data.
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Dead Reckoning for Siemens Regulators
The control program keeps track of the regulator tap position by means of a “dead reckoning” procedure, analogous to navigational dead reckoning. Dead reckoning must
start from a known position. MJ-4 dead-reckoning begins
at Neutral (U12 active, if Tap Resync is ON) or when an
operator inputs a tap position value. Subsequently, when
the microprocessor requests a tap raise/lower (J/K), and
the regulator makes the tap change (asserting Operations
Count signal U10), the control program updates the tap
position value. By this procedure, the MJ-4 maintains continuous tap position information.
If, for some reason, a tap change command is not confirmed within an appropriate period of time, a Message
condition is raised and dead reckoning is discontinued
until the tap changer once again signals Neutral. Similarly,
a Message condition is activated if an Operation count signal is received when no tap change command was issued;
or if the U12 PDS lead signals that the tap changer has
passed through neutral at a time when the assumed
dead-reckoning position is not neutral.
Note: For application on other manufacturer’s regulators and LTC apparatus, the MJ-4 implements
a similar dead reckoning procedure for tap
tracking. The details of the tap tracking
approach for these applications are included in
the Tap Tracking Application Note.
5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
5.8
Alerts—the <Alert> Menu
If the Alert name is flashing, acknowledgment is required.
Alerts represent exception conditions. A Alert condition
may be presently active, or it may have been active at
some earlier time. When a Alert occurs, the MJ-4 stores it
in the <ALERT> Menu, and illuminates the Alert LED Indicator.
5.8.1
Viewing Alerts
If the Alert indicator is flashing, it denotes that a Alert has
occurred. Use either the Alert fast path key or the Menu
and Scroll keys to view the <Alert> Menu. Use the down
arrow key to scroll through the Alerts.
Table 5.8
5.8.2
Acknowledging an Alert
To acknowledge the Alert, press the Cancel/Reset key. If
the Alert condition is still active, the Alert name will stop
flashing but the Alert indicator will remain on (steady)
until the condition clears. If multiple Alerts have occurred,
you can step through them, one at a time using the Alert
key or the ¿ and À keys. The Alert indicator will continue
to flash until all Alerts have been acknowledged.
The conditions listed in Table 5.8 activate ALERT status.
The conditions are listed in priority sequence from highest
priority at the top to lowest priority at the bottom.
Alert Data Items
Alert Name
Description
Duration
Ack. Type
Low Current
Low Current reading-- Magnitude below 1% full scale.
Continuous
Auto-clear
Auto Inhibit
Automatic mode inhibited from either terminal block or communication
link
Continuous
Auto-clear
Pseudo Manual
A remote tap raise/lower operation has been requested
(via Communications Module)
Continuous
Auto-clear
Tap Track Error6
The dead reckoning procedure has detected an inconsistency between its
assumed tap changer position and the position signaled by the PDS.
Momentary
ACK required
Neutral Signal
Error
The MJ-4 senses that the Neutral signal remains active though the tap
change input indicates that the tap has moved from Neutral.
Momentary
ACK required
Tap Position ????
The MJ-4 does not know the present tap position (based on the dead reckoning algorithm).
Continuous
Auto-clear
Low PT Threshold
The MJ-4 detects a Vld voltage below the PT Threshold setting.
Continuous
Auto-clear
Over Current
The current exceeds the threshold determined by:
I Load Max(%) x I FullLoad
Continuous
ACK required
NV RAM Reset
The non-volatile (battery-backed) Static RAM appears to have lost some or
all of its data.
Momentary
ACK required
Low Battery
The back-up battery is below the minimum threshold and should be
replaced.
Continuous
Auto-clear
High Voltage
Maximum PT voltage exceeded (145 Volts for U2 and/or P2)
Continuous
ACK required
Not in auto
Auto/Manual switch is in Manual
Continuous
Auto-clear
R Limit Reached
Raise Limit Reached. Tap position has reached or exceeded the value
specified in “R Limit” item
Continuous
Auto-clear
L Limit Reached
Lower Limit Reached. Tap position has reached or exceeded the value
specified in “L Limit” item
Continuous
Auto-clear
Self Test Fault
The MJ-4 self test found an error condition
Continuous
ACK required
Notes for Table 5.8:
1.
Alert status is in effect if any Message condition is active. If the Alert status is the result of more than one condition, the Message
Indicator will flash until all Alerts requiring acknowledgment have been acknowledged. Whenever the Alert Indicator is flashing, it is an
indication that the contents of the <ALERT> Menu should be reviewed.
2. Continuous - Condition lasts indefinitely. (May persist after Alert is acknowledged.)
3. Momentary - Condition lasts briefly.
4. ACK required - The MJ-4 keeps the Alert active until you acknowledge it.
5. Auto-clear - The MJ-4 automatically clears the Alert when the condition ceases.
6. The Tap Track Error alert can be disabled, if desired. See Table 4.2 on page 17.
44
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5 Reading and Interpreting MJ-4A & MJ-4B Control Panel Data
5.9
Harmonics Data—
the <HARMONICS> Menu
Harmonics data are calculated for load voltage, source
voltage, and load current. The <HARMONICS> Menu
contains the data items listed in Table 5.9:
Table 5.9
<HARMONICS> Menu Data Items
Vld THD = NNN.N%
Vs THD =: NNN.N%
Ild THD =: NNN.N%
Show Harm: ODD, EV/OD
Show As: %TOTAL, %FUND, RMS VAL.
Vld 1st = NNN.N%T
Vld 1st = NNN.N V
Vld 3rd = NNN.N%F
:
Vld 31st = NNN.N% F
Vs 1st = NNN.N%T
Vs 1st = NNN.N V
Vs 3rd = NNN.N%F.
Vs 31st = NNN.N%F
:
Ild 1st = NNN.N%T
Ild 1st = NNNN A
Ild 3rd = NN.N%F
:
Ild 31st:NN.N%F
5.10
The <COMMUNICATIONS> Menu contains Local Data
Port status. See Section 4.7 for configuring <COMMUNICATIONS> Menu items, such as baud rate, parity,
address, etc.
The <COMMUNICATIONS> Menu displays the status
items listed in Table 5.10:
Table 5.10
DATA ITEM
Use the Menu and Scroll keys to view the <HARMONICS> Menu. Use the ¿ and À keys to step through the
data items.
Show Harm: Odd
Ev/Odd
Show odd harmonics only
Show both even and odd harmonics.
Show As:
Show harmonics as percentage of total signal magnitude.
Show harmonics as percentage of the fundamental.
Show harmonics as signal
magnitude.
%TOTAL.
%FUND.
RMS Val.
Use the ¿ and À keys in the <HARMONICS> Menu to
view the harmonics data. The harmonics data items
appear after configuration items Show Harm and Show
As. The harmonics data items always include the rms and
% Total values for the fundamental (i.e., the 1st harmonic).
Data for even harmonics is only shown if configuration
item Show Harm is set for EV/OD. Data for harmonics
above the 1st harmonic are shown as % Total, % Fundamental, or rms depending on which is selected in the
Show As configuration item.
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<COMMUNICATIONS> Menu Status Items
Data Stat =
Bold denotes default
The first set of data items in the <HARMONICS> Menu
are the three Total Harmonics Distortion values for: load
voltage (Vld THD: NNN.N%), source voltage (Vs THD:
NNN.N%), and load current (Ild THD: NNN.N%). The second set of data items in the <HARMONICS> Menu are
Show Harm: and Show As:. These data items allow you to
select the format of the data to be viewed:
Local Data Port—
the <COMMUNICATIONS> Menu
5.11
DESCRIPTION
Communications status conditions
GoodRX
A “good” message (no errors) has
been received
Inact;
Data Port is inactive
LocCtl
MJ-4 is in local control (commlink
control is inhibited)
FE RX
Framing Error in received message
OE RX
Overrun Error in received message
NE RX
Noise Error in received message
PE RX
Parity Error in received message
CSE RX
Checksum Error in received message
PTE RQ
Point Type Error (invalid point type
requested)
CME RX
Command Error (invalid command)
received
PNE RX
Point Number Error (Invalid point
number) received
VRC Status - the <REGULATOR>
Menu
The VRC Status items indicate the present level of Voltage
Reduction Control (VRC). The VRC Status item is indicated as:
VRC Stat = XX.X%MY
where: XX.X% is the amount of voltage reduction
(0.0% to 10.0%)
M is the VRC Mode
where: L = Local
R = Remote
A = Auto (w/Remote Override)
Y is the presently active VRC step
for:
Local - not applicable
Remote - 1, 2, or 3
Auto - 1 or 2
This data item can be accessed using the VRC Select fastpath key.
6 MJ-4A & MJ-4B Control Panel Automatic Mode
6 MJ-4A & MJ-4B Control Panel Automatic Mode
This Chapter covers operating principles of the MJ-4 control program and describes the various functions performed by the microprocessor. It contains the information
you may need when deciding between the various options
described in Chapter 4 (Setting Up the MJ-4 Control Panel)
and Chapter 5 (Reading and Interpreting MJ-4 Control
Panel Data).
6.1
MJ-4A & MJ-4B Control Modes
6.1.1 Summary of the MJ-4A Control Modes
The regulator control function has four operating modes:
local manual control, local automatic control, remote control, and Off. Manual control can only be performed locally.
Select the operating mode with the Remote-Auto/Off/
Manual switch as shown in Figure 6.1.
Auto
Off
(By-Pass
Position)
Remote
/
Local
Manual
Figure 6.1
Auto/Manual Switch (Shown in Off position)
Manual mode
Place the Auto/Off/Manual Switch in the down position to
activate the Manual mode. In Manual mode, you can use
the Tap Raise/Lower switch (on the MJ-4A front panel) to
control the tap position directly. Status information is available via the remote communications link, but the remote
operator cannot change settings or otherwise operate the
MJ-4A Control Panel.
The MJ-4A Control Panel remains in the Pseudo-Manual
mode for a predefined time period after receipt of the last
remote tap raise/lower command. When the time period
has elapsed, if the MJ-4A Control Panel has Remote Auto
Inhibit disabled, it resumes its normal automatic control
operations. If Remote Auto Inhibit is enabled, it maintains
its tap position until it recieves another raise/lower command or until Remote Auto Inhibit is disabled.
Auto-Local mode
With the Auto/Manual switch in the up position, if the
Remote/Local key is pressed so that the Remote Disabled
LED is on, the control Panel will be in the Auto-Local
mode. In this mode, the MJ-4A executes its normal tap
control algorithm. Status information is available via the
remote communications link, but the remote operator cannot change settings or otherwise operate the MJ-4A Control Panel
6.1.2
Summary of the MJ-4B Control Modes
The regulator control function has four operating modes:
manual and automatic control, each with remote control
enabled or disabled. Select the operating mode with the
Remote and Auto/Manual switches as shown in the figure
below.
R e m o te
/
Local
A u to /
M anual
Figure 6.1b Remote/Local and Auto/Manual Switches
Manual mode (By-Pass Position)
No operation of the tap changer can occur: remotely,
locally, or automatically.
Push the Auto/Manual Switch so that the Auto Disabled
LED is illuminated to activate the Manual mode. In Manual
mode, you can use the Tap Raise and Lower keys (on the
MJ-4B front panel) to control the tap position directly.
Auto-Remote mode
Automatic mode
With the Auto/Manual switch in the up position, the
Remote/Local key may be pressed so that the Remote
Disabled LED is off, putting the control Panel into the
Auto-Remote mode.
Push the Auto/Manual Switch so that the Auto Disabled
LED is not illuminated to activate the Automatic mode. In
Automatic mode, the MJ-4B executes its normal tap control algorithm.
In this mode, the MJ-4A executes its automatic tap control algorithms, unless overridden remotely. Status information is available via the remote communications link. A
remote operator can request a tap raise or lower via the
communications link, change settings and remotely operate the control program. For direct control via terminal
strip connections see Figure 2.4.
Remote Control Enabled
Off (By-Pass Position)
When the remote operator initiates the tap raise/lower,
the MJ-4A enables its “Pseudo-Manual” operating mode.
The Pseudo-Manual alert condition is activated, and local
automatic operations are disabled until the remote-commanded tap raise/lower is completed.
46
Push the Remote / Local push button so that the Remote
Disabled LED is not illuminated to enable remote control
(Auto-Remote mode). In this mode, the MJ-4B executes
its automatic tap control algorithms, unless overridden
remotely. A remote operator can request a tap raise or
lower via the communications link. When the remote
operator initiates the tap raise/lower, the MJ-4B enables
its “Pseudo-Manual” operating mode. The Pseudo-Manual alert condition is activated, and local automatic operations are disabled until the remote-commanded tap raise/
lower is completed.
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6 MJ-4A & MJ-4B Control Panel Automatic Mode
The MJ-4B Control Panel remains in the Pseudo-Manual
mode for a predefined time period after receipt of the last
remote tap raise/lower command. When the time period
has elapsed, if the MJ-4B Control Panel is in Automatic
mode, it resumes its normal automatic control operations.
If the MJ-4B Control Panel is in Manual mode, it maintains
its tap position until it recieves another raise/lower command or until it is placed back into Automatic mode.
Remote Control Disabled
In this mode, status information is available via the remote
communications link. In addition, the remote operator can
change settings and remotely operate the control program.
The panel may also be allowed to work in Auto-Local
mode wherin it will perform automatic control operations.
Table 6.1
Table 6.1 summarizes the four operating modes.
Summary of Control Mode Operation MJ-4A and MJ-4B
Switch Positions
Remote Control Enabled
Remote Control Disabled
6.2
With the panel remaining in Auto, Push the Remote/Local
push button so that the Remote Disabled LED is illuminated to disable Remote control. Status information is
available via the remote communications link, but the
remote operator cannot change settings or otherwise
operate the MJ-4B Control Panel.
Manual
Automatic
1. Automatic Operation Disabled
1. Automatic Operation Enabled
2. Comm link tap control override
2. Comm link tap control override
3. Comm Link Raise/Lowers Enabled
3. Comm Link Raise/Lowers Enabled
4. Comm Link Auto/Manual control Enabled
4. Comm Link Auto/Manual control Enabled
5. Tap Raise and Lower Switches Enabled
5. Tap Raise and Lower Switches Disabled
1. Automatic Operation Disabled
1. Automatic Operation Enabled
2. No comm link tap control override
2. No comm link tap control override
3. Comm Link Raise/Lowers Disabled
3. Comm Link Raise/Lowers Disabled
4. Comm Link Auto/Manual control Disabled
4. Comm Link Auto/Manual control Disabled
5. Tap Raise and Lower Switches Enabled
5. Tap Raise and Lower Switches Disabled
Overview of Automatic Control
Algorithm
8.
Monitored load current
9.
Load power factor
The automatic control algorithm maintains the output voltage within its prescribed limits while following a control
hierarchy.
10. Power flow operating mode
Normal algorithm operation is as follows. When voltage
falls outside the allowed range (defined by voltage level
set point ± ½ bandwidth), the delay timer is started. If voltage is out of range at the end of the delay period, the tap
change motor is energized. When the voltage is back
within range, the tap change motor is deactivated. (Hysteresis is included to prevent oscillations.)
Because coinciding events might introduce conflicts, an
operational hierarchy must be established. This hierarchy
is maintained when the unit is under automatic control.
Manual mode always takes precedence over automatic
control.
In automatic mode, the control program processor controls the tap changer motor. The control algorithm takes
the following into account:
1.
Calculated or monitored regulator output voltage
2.
Voltage-level set point
3.
Bandwidth set point
4.
Resistance line drop compensation set point
5.
Reactance line drop compensation set point
6.
Voltage limit control set points
7.
Voltage reduction control setpoints
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11. Power flow direction.
Conflicts are resolved according to the following priority
scheme (from highest to lowest):
1.
Automatic tap change inhibit (implemented with terminal strip jumpers or Comm Link command).
2.
Current inhibit (determined by I % Threshold of configuration setting; as % of full scale CT rating).
3.
Current Bias
Section 6.5.3)
4.
Voltage Limit Control (defined in regulator settings).
5.
Voltage Reduction Control.
6.
“Normal” regulator control operation.
setting
and
Bias
Percent
(see
47
6 MJ-4A & MJ-4B Control Panel Automatic Mode
6.3
Voltage Sensing and Correction
Voltage Sensing
The control program monitors the regulator output voltage
signal from one of the following sources:
•
a voltage transformer, “VT” [also known as a potential
transformer or “PT”], integral to the regulator, which
is turns-ratio corrected to deliver 120 VAC at the nominal system voltage.
•
the utility winding of the regulator, which generally
requires correction to deliver 120 VAC at the nominal
system voltage.
The control program senses regulator output (i.e., “load”)
voltage depending on power flow operating mode (see
Table 6.2):
Table 6.2
Regulator Output Voltage Sensing
Regulator Design
ANSI Type
Winding Used for Voltage Sensing
Forward Power
Flow Operation
Reverse Power
Flow Operation
A (Straight)
Voltage
transformer
Utility winding
B (Inverted)
Utility winding
Voltage
transformer
Since the control program routinely senses both the voltage transformer and the utility winding, it is a straightforward process for the control program to select which
source is “active” (depending on power flow mode and
regulator design).
If a voltage transformer is not installed on the regulator,
then the control will calculate the voltage on that side of
the regulator based on the utility winding voltage and tap
position.
Software Voltage Measurement Correction
The monitored output voltage is scaled appropriately to
the nominal basis voltage in two steps. The first voltage
scaling is performed through a step-down transformer.
The second scaling takes place in the software algorithm
after the voltage is converted to a numeric representation.
Software scaling corrects the nominal input voltage level
to the numeric representation of the basis voltage. The
basis voltage value is user configurable. The choices are
115, 120 and 125 V. The default basis voltage is 120 V.
6.4
Voltage Limit Control
The voltage limit control (VLC) function monitors regulator
output voltage and compares it to maximum and minimum voltage limit set points. If the VLC function is active,
the control program inhibits tap changes that would cause
the voltage to go above the VLC upper or below the VLC
lower voltage. If VLC is activated while the voltage is outside of the VLC limit range, the tap position is incremented/decremented until the voltage is within the
defined VLC range.
48
Limiting and/or runback may occur if one of the following
happens:
1.
The source voltage changes dramatically,
2.
The load on the regulator changes significantly, or
3.
The VLC function is enabled when the limit conditions
are exceeded.
Note: The VLC function uses the Vld (i.e., the load
voltage at the regulator) to determine whether
or not to limit or runback. The VLC algorithm
senses one regulator bushing for forward
power flow, and the other regulator bushing for
reverse power flow. (See Forward/Reverse
Operation modes, below).
The maximum voltage limit set point is adjustable from
106.0 volts to 134.0 volts in 0.1 volt steps. The minimum
voltage limit set point is adjustable from 106.0 volts to
134.0 volts in 0.1 volt steps. The control program will not
allow these limits to be set so that they overlap one
another.
If regulator output voltage falls outside limits, VLC acts to
return regulator voltage within limits. Return begins immediately, (i.e., without regard to the time delay setting),
while avoiding a hunting condition, (i.e., VLC will not force
a tap change which would activate the basic control algorithm and force the regulator outside limits once again).
VLC activates when load voltage is within one volt of the
upper/lower limit to prevent the voltage from going outside prescribed limits.
6.5
Reverse Power Flow
Systems where power flow reversals occur have unique
regulation control requirements. For systems of this type,
the MJ-4 senses the reversal and adjusts its operation
accordingly. When power flow direction changes, the
MJ-4A & MJ-4B control algorithm takes the following factors into account:
1.
Power Flow direction,
2.
Forward or Reverse operating mode, and
3.
Power Flow Mode as selected from the <CONFIGURE> Menu. These factors are discussed in greater
detail below:
6.5.1
Power Flow Direction
The microprocessor determines power flow direction by
continually monitoring the real power (kW) reading and the
real component of current. The real component of current
represents the component of the current which is in
phase with the load voltage signal.
The MJ-4 Control Panel indicates forward power flow
when the real power (kW) is positive and the real component of current is greater than 1% of the full scale current.
Siemens Energy, Inc.
6 MJ-4A & MJ-4B Control Panel Automatic Mode
Reverse power flow is indicated when the real power is
negative and the real component of current is greater than
1% of the full scale current. To avoid excessive switching
between Forward and Reverse Operation (defined below),
the microprocessor delays five seconds after the occurrence of a current flow reversal before switching from forward to reverse, and vice-versa.
As an example, assume current is flowing in the forward
direction. When load current magnitude drops through
zero and increases to a magnitude that exceeds 1% rated
current in the reverse direction, the microprocessor delays
five seconds and then considers reverse power flow to be
in effect. Reverse power flow remains in effect until current direction becomes forward once again and its magnitude exceeds 1% of rated current in the positive direction
for five seconds. At that time, the microprocessor considers forward power flow conditions to have resumed.
Power flow direction is indicated on many of the metering
screens. “F” indicates forward power flow, “R” indicates
reverse power flow. “F” is shown when: kW > 0 and
|Ireal| > 1% (of full scale) for 5 seconds minimum. “R” is
shown when: kW < 0 and | Ireal | > 1% (of full scale) for 5
seconds minimum. If the real current magnitude is below
the 1% threshold, the last known power flow direction
remains in effect. If the real current magnitude is below
the 1% threshold after power up or unit reset, the MJ-4
defaults to forward power flow operation.
It is possible for Reverse Power Flow conditions to occur
in regulators with no source-side voltage input (e.g., no
“Source-Side PT” for Siemens Inverted Regulators). In
this case, the MJ-4 uses the calculated source-side voltage for performing reverse power flow regulation. See
sections 5.1 and 5.2 for details on source-side voltage calculation.
When determining power flow direction, the system takes
into account the current-to-voltage phase relationship
associated with the system as specified in the <CONFIGURE> Menu (System, Utility Polarity, and I [current] Shift
parameters).
6.5.2
Forward/Reverse Operation
The MJ-4 Control Panel accommodates power flow reversals by alternating between “Forward” and “Reverse”
modes. Because the microprocessor monitors (or derives)
the voltage on both sides of the regulator, it can reverse
modes by simply reversing its definition of “source” and
“load.”
•
In Forward Operation mode, the microprocessor
senses the “L” Bushing (or derives the “L” Bushing
voltage from the “S” Bushing voltage and the knowledge of the tap position) to determine load voltage
and controls the tap changer on the basis of the Forward setpoints (Voltage, Bandwidth, Time Delay, Line
Drop Compensation). During Forward Operations,
“forward” Meter data is displayed.
•
In Reverse Operation mode, the microprocessor
senses the “S” Bushing (or derives the “S” Bushing
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voltage from the “L” Bushing voltage and the knowledge of the tap position) to determine load voltage
and controls the tap changer on the basis of the
Reverse setpoints (Voltage, Bandwidth, Time Delay,
Line Drop Compensation).
During Reverse Operations, “reverse” Meter data is displayed. The following parameters determine whether the
tap change motor is energized to raise the tap position or
to lower it:
1.
Power flow direction,
2.
Forward/reverse operation,
3.
Out-of-band status,
4.
Power flow mode (see below for details).
Tables 6.3 and 6.4 on the next page summarize the tap
change direction for each Power Flow mode
6.5.3
Current Bias and Bias Percent
This option is only in effect when the power flow mode is
Bi-Directional. For this special operation, the Bias percent
must be greater than the I Threshold%. Typically I Threhold % should be set to 0%.
The operation of this feature is described below, categorized into direction and magnitude of current flow.
Current is greater than the Bias percent (no change in prior
functionality):
•
Forward Power Flow: tap changes will occur based on
the Load bushing voltage.
•
Reverse Power Flow: tap changes will occur based on
the Source bushing voltage.
Current is less than the Bias Percent (new functionality):
•
None: no tap changes will occur.
•
Fwd: tap changes will occur based on Load bushing
voltage.
•
Rev: tap changes will occur based on Source bushing
voltage.
•
NeutT: tap changer will run to Neutral Tap.
49
6 MJ-4A & MJ-4B Control Panel Automatic Mode
6.5.4
Power Flow Modes
Idle Reverse, and Co-generation. Your selection of one of
these determines which algorithm the control program
uses under reverse power flow conditions.
The MJ-4 supports six Power Flow Modes: Forward
Locked, Reverse Locked, Bidirectional, Neutral Reverse,
Table 6.3
Tap Changer Direction
Power Flow Mode
Line Drop
Compensation
Values
Bi-Dir
F
Power Flow Direction
Forward
Reverse
•
•
•
R
Neut R
MJ-4 Internal Operation
Forward
Reverse
•
•
Idle R
•
•
Co-Gen
•
R (See Table 6.4)
F Lock
•
F
•
F
R Lock
•
R
•
R
Return to Neutral*
Forward
•
•
F
Reverse
Forward
•
•
F
Forward
•
•
F
Tap Change Control
See Table 6.4
None (tap idles)
•
Forward
•
Forward
•
Forward
•
Forward
•
Reverse
•
Reverse
* If tap position is not known, Neut R operates same as Idle R.
Table 6.4
Tap Change Control Operation
Forward
Reverse
“Vcomp” location
“L” Bushing
“S” Bushing
Out of Band High
Lower
Raise
Out of Band Low
Raise
Lower
Voltage Setpoint
Fwd Volts
Rev Volts
Bandwidth Setpoint
Fwd BW
Rev BW
Time Delay Setpoint
Fwd Delay
Rev Delay
F*
Fwd Comp (R)
Fwd Comp(X)
R*
Rev Comp (R)
Rev Comp (X)
Line Drop Compensation
(R = Resistance, X = Reactance)
*For Co-gen mode when in Reverse Power Flow mode,
use Forward Voltage, BW, and Time Delay setpoints, but
use Reverse Line Drop Compensation values.
50
Siemens Energy, Inc.
6 MJ-4A & MJ-4B Control Panel Automatic Mode
F LOCK (Forward Locked Mode)
R LOCK (Reverse Locked Mode)
This mode of operation is intended for use on systems
where reverse power flow is not anticipated. Tap changes
are inhibited under reverse power flow conditions.
This mode of operation is intended for use on systems
where forward power flow is not anticipated. Tap changes
are inhibited under forward power flow conditions.
In this mode, the controller always operates in forward
mode. The tap changer operates unless reverse current
magnitude exceeds the I Threshold % setpoint, at which
time further tap changes are inhibited. The tap changer
resumes operation when the reverse current drops below
the I Threshold % setpoint.
In this mode, the controller always operates in reverse
mode. The tap changer operates unless forward current
magnitude exceeds the I Threshold % setpoint, at which
time further tap changes are inhibited. The tap changer
resumes operation when forward current magnitude
drops below the I Threshold % setpoint.
In this mode, if power flow does reverse, Demand values
are not computed.
In this mode, when power flow is Forward, Demand values are not calculated.
View Pwr Flow: F LOCK on the <CONFIGURE> Menu.
View Pwr Flow: R LOCK on the <CONFIGURE> Menu.
Reverse Current
Forward Current
Tap changes
inhibited
Reverse Current
Tap changer operates
Tap changer operates
Tap changes resume
Tap changes resume
Forward Current
Tap changes
inhibited
Band indicators on
RPF indicator off
RPF indicator flashing
RPF indicator on
RPF indicator
flashing
Band indicators
flashing
I Threshold %
1%
0
1%
1%
Current
Figure 6.2
Forward Locked Mode
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0
1%
I Threshold %
Current
Figure 6.3
Reverse Locked Mode
51
6 MJ-4A & MJ-4B Control Panel Automatic Mode
BI-DIR (Bi-directional mode)
IDLE R (Idle Reverse)
This mode of operation is intended for use on systems
where reverse power flow is anticipated and voltage regulation is desired under either forward or reverse power
flow conditions.
This mode of operation is intended for use on systems
where reverse power flow is an abnormal situation. Under
reverse power flow conditions, the regulator idles at the
last tap position.
In this mode, the tap changer operates when current magnitude exceeds the I Threshold % setpoint. The tap
changer operates in forward mode when forward current
magnitude exceeds the I Threshold % setpoint, and in
reverse mode when reverse current magnitude exceeds
the I Threshold % setpoint.
In this mode, the controller always operates in forward
mode. When forward current magnitude drops below the I
Threshold % setpoint, tap changes are inhibited and the
regulator idles at the last tap position. Tap changer operation resumes when forward current magnitude exceeds
the I Threshold % setpoint.
I Threshold %, must be set to a minimum of 1%(when I
Dir Bias is not in use; i.e. I Dir Bias = None). See
Section 6.5.1 for more details.
Select Pwr Flow: IDLE R on the <CONFIGURE> Menu.
When I Dir Bias is in use, I Threshold should be set to 0%.
Reverse Current
Forward Current
View Pwr Flow: Bi-dir on the <CONFIGURE> Menu.
Tap Changes Inhibited
Reverse Current
Reverse
Operation
Forward
Operation
Forward Current
Tap Changes Inhibited
Forward
Operation
RPF indicator off
RPF indicator on
Band indicators flashing
1%
RPF indicator off
RPF indicator on
0
1%
I Threshold %
Current
Band indicators flashing
Figure 6.5
I Threshold %
1%
0
1%
Idle Reverse Mode
I Threshold %
Current
Figure 6.4
52
Bi-directional Mode.
Siemens Energy, Inc.
6 MJ-4A & MJ-4B Control Panel Automatic Mode
NEUT R (Neutral Reverse)
CO-GEN (Co-generation)
This mode of operation is intended for use on systems
where reverse power flow is an abnormal situation.
This mode of operation is for use on systems where
power flows from Utility to consumer at certain times and
from consumer to Utility at other times. In this mode, the
tap changer operates whenever current magnitude (either
forward or reverse) exceeds the I Threshold % setpoint.
In this mode, the controller always operates in the forward
mode. When current magnitude drops below the forward I
Threshold % setpoint, tap changes are inhibited. When
the reverse current magnitude exceeds I Threshold % setpoint for ten seconds, the tap changer resumes operation
and returns the tap changer to the neutral position without
stopping. The tap changer then remains at the neutral
position until forward current magnitude once again
exceeds the I Threshold % setpoint.
If, while the tap changer is returning to neutral, the forward current magnitude increases above the I Threshold
% setpoint, normal forward tap changer operation
resumes.
Neutral Reverse mode is dependent upon the MJ-4 tap
tracking algorithm. If the tap position is unknown to the
microprocessor, the tap changer idles at the last held position.
View Pwr Flow: NEUT R on the <CONFIGURE> Menu.
Reverse Current
Forward Current
In this mode, the controller always operates in Forward
mode. Forward Line Drop Compensation values are used
when forward current magnitude exceeds the I Threshold
% setpoint. Reverse Line Drop Compensation values are
used when reverse current magnitude exceeds the I
Threshold % setpoint. Tap changes are inhibited when
current magnitude is between the I Threshold % setpoints.
View Pwr Flow: CO-GEN on the <CONFIGURE> Menu.
Reverse Current
Forward
Operation
with
Reverse
LDC
Forward Current
Tap Changes Inhibited
RPF indicator off
RPF indicator on
Return to
neutral
after ten
seconds
Tap Changes Inhibited
Forward
Operation
Forward
Operation
with
Forward
LDC
Band indicators flashing
I Threshold %
1%
0
1%
I Threshold %
Current
Continue return
to neutral
RPF indicator on
RPF indicator off
Band indicators flashing
I Threshold %
1%
0
1%
Band indicator
LEDs on
Figure 6.7
Co-generation Mode
I Threshold %
Current
Figure 6.6
Neutral Reverse Mode
Siemens Energy, Inc.
53
7 Software for Communicating with the MJ-4A & MJ-4B Control Panel
7 Software for Communicating with the MJ-4A & MJ-4B Control Panel
7.1
Communications Software
Siemens has developed a Windows-based communications software application called MJXplorer. All configuration and data can be downloaded to a PC via the RS-232
Data Port located on the front of the MJ-4 Control Panel or
through an optional Communication Module. Downloaded data can then be saved and imported to other commonly-used software, including spreadsheet applications.
7.2
Uploading New MJ-4A & MJ-4B
Software
Siemens offers a software application, called MJXtra, for
uploading new versions of software to the Control Panel.
Through a simple set of windows and pull-down menus,
you confirm the communications settings and transmit the
new software via the front-panel Data Port.
In addition to downloading, MJXplorer software can modify configuration information and upload the information to
the MJ-4 Control Panel. The MJXplorer software and operating instructions are available from Siemens. Contact
your Siemens Power Transmission & Distribution representative for details.
Another program called DNP Configure can be used to
define a custom set of DNP points for a control panel that
has a communications module. This program is also available from Siemens. Contact your Siemens representative
for details.
All software is available on the Siemens website listed in
section 1.8.
54
Siemens Energy, Inc.
8 MJ-4A & MJ-4B Control Panel Basic Troubleshooting
8 MJ-4A & MJ-4B Control Panel Basic Troubleshooting
8.1
Introduction
•
Power and Sensing fuses
MJ-4 Control Panel service is primarily accomplished at
the factory. However, certain basic procedures can be
accomplished in the field. This chapter outlines a set of
procedures whose major objectives are to:
•
External Source fuse (if External Source Terminals are
used to power the unit)
•
Fuse connectors not mated properly
1.
Ensure that the fault is inside the MJ-4 (and not in
external connections or connected equipment).
•
Jumpers not in their correct positions
2.
Ensure that the fault is not due to improper jumper
arrangements or some other user-correctable condition.
•
Terminal Strip connectors not mated properly
•
Terminal Strip connector jumpers missing or screws
not tightened properly
3.
Determine whether the fault can be locally repaired
(e.g., by replacing a fuse).
CAUTION
Troubleshooting approaches depend upon the problem.
Among other indicators, you should consider:
•
Visual review of the unit.
•
Alerts (see Table 8.1 below).
8.2
120 volts on terminal block, leads,
and inside control panel housing.
May result in minor or moderate injury
including equipment damage.
Disconnect all power sources before
making connections to the terminal block
or opening the control panel housing.
Visual Inspection
Check:
Table 8.1
Alert Messages
Alert Name
What to Check
Low Current
Check E1 and C2 wiring. Check calibration on the Current inputs.
Auto Inhibit
This alert does not indicate a fault condition. It indicates that Automatic Inhibit has been activated (either via the
communications link or via the Automatic Inhibit Input terminals
Tap Track Error
May indicate a temporary fault condition (failure to detect a transition on one of several input lines.) Check PDS signals J, K, U10 and U12.
Neutral Sig. Err
May indicate a temporary fault condition (failure to detect a transition on one of several input lines.) This alert could
also indicate a problem with the Neutralite™ input signal. Check the Neutral (PDS-U12) input.
Tap Pos ????
May indicate a temporary fault condition (failure to detect a transition within the allowed time period on one of several input lines.) Check the Neutral (PDS-U12) and Operations Counter (PDS-U10) inputs.
Low PT Thresh
Overcurrent
NV RAM Reset
This alert does not necessarily indicate an MJ-4 fault condition. Check to see whether this alert condition goes
away when both U2 and P2 are above the PT Threshold.
This alert does not (normally) indicate an MJ-4 fault condition. Ensure that this Alert goes away when an in-range
current (0-200 mA) is applied at C2/E1.
May indicate a temporary fault condition. If condition appears repeatedly, replace the unit.
Low Battery
Indicates that it is time to replace the Lithium Battery. If condition persists after a good battery is installed, check
that the battery was installed properly. If fault persists, consult the factory.
High Voltage
May indicate a temporary system fault condition. If condition persists when in-range voltages (90-140 VAC) are
applied to both PDS-U2 and PDS-P2 inputs, perform calibration.
Not in Auto
Indicates that Remote-Auto/Off/Manual switch is in Manual.
R Limit Reached,
L Limit Reached
These alerts indicate that the tap position has reached or exceeded the pre-set threshold. These alerts may occur
during normal operation due to system conditions. If these alerts occur when system conditions do not warrant it,
their occurrence could indicate an MJ-4 failure. Verify the MJ-4 can automatically raise and lower tap position.
Self Test Fault
This alert indicates a failure of one or more MJ-4 self tests. Consult your Siemens representative for instructions.
Siemens Energy, Inc.
55
8 MJ-4A & MJ-4B Control Panel Basic Troubleshooting
8.3
Troubleshooting Based on Alert
Messages
Alert messages can be used to help diagnose both system problems (ones which include both regulator and controller), and internal MJ-4 problems. Table 8.1 provides
suggestions for troubleshooting an MJ-4 Control Panel
using information from the <ALERTS> menu.
Note that faults identified as “temporary” may be due to
transient conditions within the system and may not be
internal MJ-4 faults.
Note that faults identified as “temporary” may be due to
transient conditions within the system and may not be
internal MJ-4 faults.
8.4
Voltage and Current Calibration
The MJ-4 Metering functions are calibrated at the factory.
Periodically check calibration, and, if needed, recalibrate
the MJ-4:
8.4.1
Checking the U2 Voltage Calibration
Note: You can check the U2 voltage calibration while
the panel is installed on a regulator.
To check U2 calibration, apply an AC voltage (in the range
of 115 to 135 VAC) from U2 to E. Monitor the Voltage Calibration/Test Terminals with a true RMS voltmeter. View
the “U2 Cal” screen on the MJ-4 (i.e., goto <DIAGNOSTICS> menu and press down arrow once to show “U2
Cal”.) Verify that the “U2 Cal” reading matches the applied
voltage (within ± 0.5 VAC) If calibration is off, recalibrate
(see below.)
8.4.2
Checking the P2 Voltage Calibration
Note: If the regulator provides the “source” voltage
signal, you can check the P2 voltage calibration
while the panel is installed on the regulator. (If
the regulator lacks a “source” voltage signal,
then there is no need to calibrate the P2 input.)
To check P2 calibration, apply an AC voltage (in the range
of 115 to 135 VAC) from P2 to E. Monitor the Voltage Calibration/Test Terminals with a true RMS voltmeter. View
the “P2 Cal” screen on the MJ-4 (i.e., goto <DIAGNOSTICS> menu and press down arrow twice to show “P2
Cal”) Verify that the “P2 Cal” reading matches the applied
voltage (within ± 0.5 VAC) If calibration is off, recalibrate
(see below.)
8.4.3
Checking the Load Current Calibration
Note: To check the current calibration, remove the
panel from the tap changer apparatus, connect
an external ammeter, and apply an external AC
current source.
To check C/C2 Low calibration, apply a nominal 5 mA AC
current at C2/E1 and verify that “C/C2low” reads within
±0.2 mA of the applied value (as displayed on external
Ammeter connected at C/C2.)
56
To check C/C2 Medium calibration, apply a nominal 80 mA
AC current at C2/E1 and verify that “C/C2med” reads
within ± 0.5 mA of the applied value (as displayed on
external Ammeter connected at C/C2.)
To check C/C2 High calibration, apply a nominal 140 mA
AC current at C2/E1 and verify that “C/C2high” reads
within ± 0.7 mA of the applied value (as displayed on
external Ammeter connected at C/C2.)
8.4.4
Calibrating the U2 Voltage
Connect an external true rms voltmeter at the front panel
“Voltage Calibration/Test Terminal.” Apply the nominal calibration voltage (per Table 8.2.) Display the “U2 Cal”
screen. To calibrate, press the Change key, then the À or
¿ key to make the value shown on the MJ-4 display agree
with the external voltmeter value. When the change is
complete, press the Save key.
Note: If password protection is in effect, you must
enter the password to enable calibration. The
default password for the <DIAGNOSTICS>
Menu is “3333”
.
8.4.5
Calibrating the P2 Voltage
Connect an external true rms voltmeter at the front panel
“Voltage Calibration/Test Terminal.” Apply the nominal calibration voltage (per Table 8.2.) Display the “P2 Cal”
screen. To calibrate, press the Change key, then the À or
¿ key to make the value shown on the MJ-4 display agree
with the external voltmeter value. When the change is
complete, press the Save key.
Note: If password protection is in effect, you must
enter the password to enable calibration. The
default password for the <DIAGNOSTICS>
Menu is “3333”
.
8.4.6
Calibrating the Load Current
Note: To calibrate the current, disconnect the panel
from the tap changer apparatus. Remove onboard jumper J1 (see Figure J.1) and Terminal
Strip jumper at P3B-11 & 12. Connect an external ammeter, and apply an external AC current
source, per Table 8.2. After calibration, replace
J1 and Terminal Strip jumper at P3B-11 & 12.
The Load Current (Ild) has three calibration set-points:
C/C2 Low, C/C2 Medium, and C/C2 High. Calibrate all
three setpoints with an external true rms ammeter connected at the rear panel (terminal strip contacts P3B-11 &
12.) Connect a (nominal) 0-200 mA AC current source at C/
C2 (terminal strip contacts P2A-5 & 7.)
Apply the C/C2 Low calibration current (per Table 8.2). Use
the Menu and Scroll keys to view the “C/C2low” screen.
To calibrate, press the Change key, then the À or ¿ key to
make the value shown at the MJ-4 display agree with the
external ammeter value. When the change is complete,
press the Save key.
Siemens Energy, Inc.
8 MJ-4A & MJ-4B Control Panel Basic Troubleshooting
Note: If password protection is in effect, you must
enter the password to enable calibration. The
default password for the <DIAGNOSTICS>
Menu is “3333”
.
Table 8.2
Repeat the above procedure for C/C2 Medium and C/C2
High. After calibration, replace J1 and Terminal Strip
jumper at P3B-11 & 12.
Voltage and Current Calibration
Signal to
Calibrate
Test Signal
Application
Point
Test Signal
Measurement
Point
Nominal
Calibration Signal
Magnitude
Tolerance
MJ-4 Data Item
<DIAGNOSTICS>
Menu
Conditions
U2
U2 to E
(P2A-8 & 6)
Voltage Calibration
Terminals
120 VAC (RMS)
±0.5 VAC
U2 Cal
U2/P2 key
= U2
P2
P2 to E
(P2A-4 & 6)
Voltage Calibration
Terminals
120 VAC (RMS)
±0.5 VAC
P2 Cal
U2/P2 key
= P2
C/C2
Low
C2 to E1
(P2A-5 & 7)
C/C2
(P3B-11 & 12)
5 mA (RMS)
±0.2 mA
C/C2low
Note 1
C/C2
Medium
C2 to E1
(P2A-5 & 7)
C/C2
(P3B-11 & 12)
80 mA (RMS)
±0.5 mA
C/C2med
Note 1
C/C2
High
C2 to E1
(P2A-5 & 7)
C/C2
(P3B-11 & 12)
140 mA (RMS)
±0.7 mA
C/C2high
Note 1
Note 1: Prior to calibration, disconnect panel from regulator, and remove on-board jumper J1 (see Figure J.1) and Terminal Strip jumper at
P3B-11 & 12. After calibration, replace J1 and Terminal Strip Jumper at P3B-11 & 12.
8.5
MJ-4A & MJ-4B Self Testing
After reset, the MJ-4 runs through an internal diagnostics
routine. The start-up diagnostics routine includes a front
panel indicator test—the LED indicators simultaneously
flash three times so that an operator can verify them. During the LED test, the MJ-4 displays “Testing...” on the
front panel screen.
The start-up diagnostics routine consists of several checks
and internal tests, including a ROM (program memory)
checksum calculation. The MJ-4 displays the results of
the checksum test (PASS or FAIL) in the “Checksum=”
item under the <DIAGNOSTICS> Menu.
A checksum failure indicates a problem with the unit. A
checksum or other self-test failure will activate the “Self
Test Fault” message. If this message occurs, contact
your Siemens Power Transmission & Distribution representative for instructions.
8.6
Communications Module
Troubleshooting
In the <DIAGNOSTICS> Menu, the MJ-4 Control Panel
provides data items for testing the Communications Module and verifying its operation. Please refer to the MJ-4
Communications Module Installation Manual for verifying
the Communications Module operations using the
<DIAGNOSTICS> Menu data items.
8.7
Tap Tracking
When viewing this alert, press the left arrow key repeatedly. On the right side of the screen two character error
codes will appear. There could be between one and four
of these codes. Note that the codes could have been gen-
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erated all at once or at any time since the alert was last
cleared. The codes are:
UX: occurs if algorithm can't tell direction tap change occurred or if
operation count increases without calling for a raise or lower
RS: occurs when neutral signal is on and tap pos is not neutral; panel
resets tap position to neutral if Tap Resync is turned on
TT: occurs if Tap Resync is on and bad neutral signal and tap position
combo persists for more than 10 seconds
OD: occurs if "tap_chg_ctr" goes down to zero before a tap change
occurs. tap_chg_ctr = R/LOnTime + TapChgT/O
Tap Changer control may be customized using the following settings from the <DIAGNOSTICS> menu.
R/LOnTime: maximum time to keep the tap changer motor running
before pausing for R/LOffTime.
R/LOffTime: pause between tap changes for this amount of time.
Fixed R/L On time:When in Auto mode, if this setting is “Y”, motor
stays on for exactly R/L On time seconds.
TapChgT/O: if the control runs the tap changer motor for R/LOnTime
and no operations count occurs, then after this many more seconds a Tap
Track Err OD alert is generated.
TapIn: defines the operations count signal input line.TapInType: defines
the operations counter type.
TapInPulse:
defines the minimum amount of time that an operations
count signal must be present in order for the operations counter to increment (applies to Pulse type operations counters only).
NeutralIn: defines the neutral signal input line.
NeutralCount: number of Neutral positions (for LTC’s only).
57
Appendix A: Specifications
A Specifications
Operational Requirements
Accuracy
Temperature
Metering accuracy*: ±0.5% over the -40°C to +85°C operating range.
Operating: -40°C to +85°C
Storage: -40°C to +85°C
Humidity
Operating: Relative humidity of 5% to 95% non-condensing
Storage: Relative humidity of 5% to 95% non-condensing
(U2 and P2 range)
80 to 145 volts RMS
Frequency
45 to 65 Hz
* Basic accuracy of the MJ-4A & MJ-4B (excludes Potential Transformer or Current Transformer errors).
Electrical transient immunity
The MJ-4A & MJ-4B Current Transformer (CT) withstands
a sudden open circuit without damage to the control circuit. However, an open CT circuit can result in dangerously
high voltage, and should be avoided.
The MJ-4A & MJ-4B Control Panel is impervious to electrical transients as defined by the following:
Surge: ANSI/IEEE C37.90.1-2002
All PDS and terminal strip connections
High Energy Surge: ANSI/IEEE C62.41-1980
U2 and P2 inputs only
Not susceptible to upset due to high radio frequency interference (RFI) defined by the following:
RFI Susceptibility: ANSI/IEEE C37.90.2-1987.
58
Siemens Energy, Inc.
Appendix B: Physical Installation on Siemens Regulators
B Physical Installation on Siemens Regulators
Physical installation consists of placing the MJ-4 Control
Panel in its weatherproof housing and connecting the
Polarized Disconnect Switch to the regulator. Customersupplied external connections to the terminal strip on the
back of the unit are made as required. Begin by disconnecting and removing the panel you are replacing.
Switch Settings for MJ-4A (See Chapter 2)
As you prepare to install the MJ-4A Control Panel, the following switch settings should be observed:
Normal/External power switch
Auto/Manual switch
Tap Raise and Lower switch
OFF
OFF
OFF
Switch Settingsfor MJ-4B (See Chapter 2)
As you prepare to install the MJ-4B Control Panel, the following switch settings should be observed:
Normal/External power switch
Auto/Manual switch
Tap Raise and Lower switches
A wing-nut-secured, ten-position, male Polarized Disconnect Switch (PDS) provides the interface to the regulator
sensing and control circuits.
The PDS is compatible with previous generation AccuStat™ controllers. The PDS connections are:
P2
C2
E
E1
U2
J
K
U10
U11
High side of neutral position indicator switch.
When closed to ground, indicates tap changer
in neutral. (Turns on Neutralite).
AC side of Potential Transformer, if present.
High side of Current Transformer.
Collective neutral return for the control panel,
the Utility winding and PT winding.
Low side of Current Transformer.
AC high side of regulator Tertiary (Utility)
winding. Provides:
-Control Panel power source.
-Voltage reference.
-Voltage Phase reference for flow direction,
-Power factor
Output from the panel to Raise
regulator tap position.
Output from the panel to Lower
regulator tap position
High side of Op Counter switch. (closes to
ground E)
High side of regulator drag hands reset
solenoid (returns to E)
Replacing Older Control Units with the MJ-4A &
MJ-4B Control Panel
If the original control has modifications such as Auxiliary
Transformer, Auxiliary CT, Reverse Power Flow Detector,
Voltage Limit Control, or other accessories mounted in the
Siemens Energy, Inc.
will
be
Note 1: Some older controllers do not provide the necessary signals to support all MJ-4 functions. (i.e., tap position indication, operations counter, Neutralite, drag hands
reset.)
Note 2: The control being replaced may incorporate a
jumper between the P2 and U2 terminals on the female
(stationary) portion of the PDS. If and only if this jumper is
present:
1.
Remove the jumper.
2.
Remove the P2 lead from the P2 screw terminal.
Reconnect the P2 lead to the U2 screw terminal, leaving the P2 terminal vacant.
OFF
AUTO DISABLED
OFF
Polarized Disconnect Switch
U12
enclosure, special engineering instructions
required before the existing control is replaced.
CAUTION
Connecting of P2 and U2 lines from the
regulator will cause a direct short circuit of
the two voltage sources.
Will result in severe internal damage.
To Prevent:
Do not connect the P2 and U2 leads to the same
terminal.
Note 3: To replace panel types UA-23, UA-24, UA-25 (also
type UJ-1 used on S/N’s 9-0110-00159, 00163, and 00201)
a special adapter mounting kit is required. To make use of
this adapter kit (Cat. No. 1670) the MJ-4 Control Panel
must be installed complete with its enclosure.
Note 4: To replace panel types UJ-4 and UJ-5 with the MJ4, replace the ten-pin male portion of the PDS Supplied
with the MJ-4 Control Panel with the seven-pin male PDS
from the older control. Tape up the three unused leads
U10 (operation counter), U11 (drag hand reset) and U12
(NeutraliteTM). Install a jumper wire from C1 to E on the
female portion of the PDS. For this installation, the MJ-4
will not track the tap position and will not update the operations counters.
Note 5: To replace controls other than those named, refer
to the factory for special engineering instructions.
Note 6: Regardless of the panel type being replaced, the
MJ-4 Control Panel must be configured to operate with
the particular regulator on which it is being installed. (See
Chapter 4).
59
Appendix B: Physical Installation on Siemens Regulators
Replacing existing MJ-4 Control Panels
Field Maintenance:
To replace an already-installed MJ-4 Control Panel, the procedure is similar to that described above.
The MJ-4 is a state-of-the-art controller utilizing complex
circuits and sophisticated components for the detection,
processing and display of regulator parameters and the
precise control and operation of the tap changer. Field
maintenance is not recommended as special equipment
and instrumentation are required for the proper calibration,
testing and checking of the controller operation. It is
strongly recommended that MJ-4 controller repair, testing,
and calibration be performed only by Siemens authorized
repair facilities.
Polarized Disconnect Switch
Plug the PDS from the new MJ-4 into the female PDS in
the control enclosure.
Terminal Strip Connector
External devices are wired to a terminal strip connector at
the back of the MJ-4 Control Panel. See Appendix K for
pin-outs and signal descriptions.
WARNING
WARNING
Hazardous voltage will be present on
various control leads when regulator is
energized.
Could result in death or serious injury
including equipment damage from
contact with live line conductors.
To prevent:
Remove fuses before by-passing the
regulator and leave the fuses out while
the regulator is bypassed.
60
Use of unauthorized parts and/or unqualified
personnel in the repair of this equipment
could result in death or serious injury including
electrical damage to equipment.
To Prevent:
Only authorized personnel should work on this equipment
including installation, operation and maintenance.
Siemens Energy, Inc.
Appendix C: Regulator Control Diagrams
C Regulator Control Diagrams
Typical Control Diagrams - For Sample Reference Only
Figure C.1
ANSI Type ‘A’ (Straight) Regulator Control Diagram
Siemens Energy, Inc.
61
Appendix C: Regulator Control Diagrams
Figure C.2
62
ANSI Type ‘B’ (Inverted) Regulator Control Diagram
Siemens Energy, Inc.
Appendix D: Menu Parameters
D Menu Parameters
D.1
<CONFIGURE> Menu:
Leading and Lagging Regulators
The following steps will help you determine which of the
two regulators in a Delta configuration is “leading” and
which is “lagging” on an open Delta installation:
1.
2.
3.
4.
D =
2.
•
Ensure that there is load current on the line. Load current must be of sufficient magnitude to cause a definite response of the line drop compensation circuit.
Normally, 25% of the regulator setting will be adequate.
5.
Set the Remote/Auto/Manual switch to AUTO on both
controllers.
6.
Allow both regulators to run and come to rest in band.
The regulator whose tap position is closest to maximum is the “lagging” regulator. The other regulator is
the “leading” regulator.
Single phase
k = 2.0x
•
Current Transformer Rating
Voltage Transformer Ratio
Wye Connected
k = 1.0x
Adjust both front panel controls to the same settings:
X=0.692 ohms/mile
Determine compensation multiplier, k, as
•
Use the Configuration Keys to temporarily set both
controllers to System type = WYE. This will be corrected in step 7.
2.0 V
120 V
0 Seconds
0V
(+) 12
24 x 24 x 48 = 30 inches
R=0.592 ohms/mile
Disable automatic control of tap changer as follows:
Set Raise/Lower tap switch to OFF. Set Remote/Auto/
Manual switch on both controllers to Manual.
Bandwidth
Voltage Level
Time Delay
Resistance Volts
Reactance Volts
3
Current Transformer Rating
Voltage Transformer Ratio
Delta Connected
k = 1.73x
Current Transformer Rating
Voltage Transformer Ratio
EXAMPLE: The regulators involved are 3 - 333 kVA at 7.2
kV configured in a wye-connected three phase bank. (The
CT primary for this regulator is 400 A.)
k = 1.0
400
= 6.67
7200 / 120
Note: The amount of tapchange excursion can be
made more or less, if desired, by appropriate
adjustment of the reactance volts setting.
Note: Multipliers for many common system voltages
and regulator ratings are included in tables D.4
and D.5 below.
7.
3.
Use the Configuration keys to set the System type to
Delta Lead for the leading regulator and to Delta Lag
for the lagging regulator, as determined in step 6.
D.2
<REGULATOR> Menu:
Line Drop Compensation
There are several methods used to determine line drop
compensation settings, The “Load Center” method is
probably the most commonly used and most clearly illustrates the procedure.
1.
Using knowledge of the distribution feeder and the
tables below, establish the conductor resistance and
reactance per mile of feeder.
Determine the Line Drop Compensation Settings
Resistive Compensation Setting = k x line length (mi) x
resistance (ohms/mi)
Reactive Compensation Setting = k x line length (mi) x
reactance (ohms/mi)
EXAMPLE: The line is 3 miles long.
Resistance Setting = 6.67 x 3 x 0.592 = 12V
Reactance Setting = 6.67 x 3 x 0.692 = 14V
EXAMPLE: Conductor 4/0 ACSR, Regular Flat Spacing at
24 inches.
Siemens Energy, Inc.
63
Appendix D: Menu Parameters
Table D.1
Line Drop Compensation Table - Distribution Line Resistance and Reactance
Ohms per Conductor per Mile at 60 Hz
Copper - Hard Drawn
Cond. Res.
Size
at
50oC
MCM
Aluminum - Steel Reinforced
Reactance (See Note 1)
Distance “D” Between Centers of Conductors
18”
24”
1000 .0685 .449
.484
30”
.511
36”
.533
42”
.552
48”
.568
54”
.593
60”
.595
Cond. Res.
Size
at
50oC
MCM
Reactance (See Note 1)
Distance “D” Between Centers of Conductors
18”
1272.0 .0851 .421
24”
30”
36”
42”
.456
.483
.505
.524
48”
.540
54”
.555
60”
.567
750 .0888 .466
.501
.529
.550
.569
.585
.600
.612
954.0 .1128
.439
.474
.501
.523
.542
.553
.573
.585
600 .1095 .481
.516
.543
.565
.584
.600
.615
.627
795.0 .1373 .450
.485
.512
.534
.553
.569
.584
.596
500 .1303 .492
.527
.554
.576
.595
.611
.626
.638
556.5 .1859 .469
.504
.531
.553
.572
.588
.603
.615
400 .1619
.507
.542
.569
.591
.610
.626
.641
.653
477.0 .216
.479
.514
.541
.563
.582
.598
.613
.625
.636
350 .1845 .515
.550
.577
.599
.618
.634
.649
.661
397.5 .259
.490
.525
.555
.574
.593
.609
.624
300 .215
.525
.560
.587
.609
.628
.644
.659
.671
336.4 .306
.500
.535
.562
.584
.603
.619
.634
.646
250 .257
.536
.571
.598
.620
.639
.655
.670
.682
266.8 .385
.514
.549
.576
.598
.617
.633
.648
.660
.776
AWG
AWG
4/0 .303
.546
.581
.603
.630
.649
.665
.630
.692
4/0 .592
.630
.665
.692
.714
.733
.749
.767
3/0 .382
.554
.589
.616
.638
.657
.673
.688
.700
3/0 .723
.670
.705
.732
.754
.773
.789
.804
.816
2/0 .481
.581
.616
.643
.665
.684
.700
.715
.727
2/0 .895
.690
.725
.752
.774
.793
.809
.824
.836
1/0 .607
.595
.630
.657
.679
.698
.714
.729
.741
1/0 1.12
.705
.740
.767
.789
.808
.824
.839
.851
1 .757
.609
.644
.671
.693
.712
.728
.743
.755
2 1.69
.714
.749
.776
.798
.817
.833
.848
.860
2 .964
.623
.658
.685
.707
.726
.742
.757
.769
4 2.57
.708
.743
.770
.792
.811
.827
.842
.854
6 3.98
.722
.757
.784
.806
.825
.841
.856
.868
4 1.518 .648
.683
.710
.732
.751
.767
.782
.794
6 2.41
.677
.712
.739
.761
.780
.796
.811
.823
8 3.80
.714
.749
.776
.798
.817
.833
.848
.860
Note: 1. 60 Hertz reactance in ohms per mile of each conductor of a single phase, or of a three phase, symmetrical triangular spacing. For other arrangements of conductors see below. The reactance for other frequencies is F/60
times the table values. Reactance values for copper wire are for concentric standard copper conductors. Reactance values for aluminum cable conductors are approximately correct.
B
A
A
B
D =
C
The Siemens Line Drop Calculator software application
simplifies the calculation of these parameters. Simply
enter the system values and the application automatically
calculates the resistive and reactive components for you.
Enter these values in the <REGULATOR> menu, and the
MJ-4 automatically compensates for the line drop when
adjusting the output voltage of the regulator.
64
3
ABC
C
Contact your Siemens representative about obtaining this
application. You may also download this application from
the Siemens web site (see Section 1.8). After arriving at
the website, select Products, and then the Voltage Regulator item. This application is available on the Download
page.
Siemens Energy, Inc.
Appendix D: Menu Parameters
Table D.2
Line Drop Compensation Table - Compensation Multipliers
Regulator Operating Data
Operating KV
(Volt. Trans. Ratio
Circuit Connection
Regulator Operating Data
Single
Delta
Single
Delta
19.9
50
.60
.52
.30
5.0
100
5.00
4.33
2.50
(166/1)
100
1.20
1.04
.60
(40/1)
150
7.50
6.49
3.75
14.4
(120/1)
Wye
Operating KV
(Volt. Trans. Ratio)
Wye
167
2.40
2.08
1.20
200
10.00
8.66
5.00
200
2.40
2.08
1.20
250
17.50
15.15
8.75
334
17.50
15.15
8.75
50
.83
.72
.42
500
35.00
30.30
17.50
100
1.67
1.44
.83
625
35.00
30.30
17.50
200
3.34
2.88
1.67
668
35.00
30.30
17.50
300
5.01
4.32
2.49
835
35.00
30.30
17.50
400
6.68
5.78
2.52
4.16
100
5.76
4.98
13.8
50
.87
.75
.44
(34.7/1)
150
8.64
7.48
(115/1)
100
1.74
1.50
.87
200
11.53
9.97
5.76
150
2.61
2.25
1.31
250
20.20
17.48
10.10
200
3.48
3.00
1.74
4.32
334
20.20
17.48
10.10
500
40.40
34.96
20.20
7.62
50
1.57
1.36
.79
625
40.40
34.96
20.20
63.5/1)
75
2.36
2.04
1.18
668
40.40
34.96
20.20
100
3.15
2.72
1.57
835
40.40
34.96
20.20
150
4.72
4.08
2.36
219
7.87
6.82
3.94
2.5
200
20.00
17.30
10.0
328
12.60
10.90
6.30
(20/1)
300
30.00
25.96
15.00
438
12.60
10.90
6.30
400
40.00
34.60
20.00
548
12.60
10.90
6.30
500
70.00
60.55
35.00
668
70.00
60.55
35.00
7.2
50
1.67
1.44
.83
1000
140.00
121.10
70.0
(60/1)
75
2.50
2.16
1.25
1250
140.00
121.10
70.0
100
3.34
2.89
1.67
1332
140.00
121.10
70.0
150
5.00
4.33
2.50
1665
140.00
121.10
70.0
219
8.34
7.22
4.17
328
13.33
11.55
6.67
438
13.33
11.55
6.67
548
13.33
11.55
6.67
D.3.1
D.3
Current
Rating
Circuit Connection
Current
Rating
<CONFIGURE> Menu:
Transformer Polarity
The relative polarity between the Utility (Tertiary or TV)
winding and the Current Transformer (CT) must be specified in the <CONFIGURE> Menu Utility Pol: parameter.
This section describes the method for determining the
correct specification (NORM or REV) from examination of
the Regulator nameplate.
Single-Phase Regulators
D.3.1.1 Single-Phase Inverted Design Regulators
(ANSI type B)
The Utility transformer polarity is always normal for SinglePhase Inverted Design Regulators. Specify Utility
Pol:NORM.
D.3.1.2 Single-Phase Straight Design Regulators
(ANSI type A) without forced air cooling
The Utility transformer polarity for Single-Phase Straight
Design regulators can be determined from the regulator
nameplate schematic diagram. The Utility winding taps
are labeled Un -- Ux, E2.
Siemens Energy, Inc.
65
Appendix D: Menu Parameters
D.3.1.3 Single-Phase Straight design regulators
(ANSI type A) with forced air cooling
If the Un - - Ux taps are to the left of E2 with no taps to
the right of E2, and the polarity mark is on one of the
U taps, specify Utility Pol: NORM. (See Figure D.1.)
Figure D.1
Left of E2
For these regulators, the Utility winding not only provides
power to the controller — it also provides power for the
forced air fan(s). The E2 tap is located between the Un - Ux terminals on the regulator’s nameplate schematic. The
U5 tap is normally used for fan voltage and can be either
to the left or to the right of E2. To determine whether the
polarity is ‘normal’ or ‘reverse’, you must examine both the
schematic diagram and the connection table on the nameplate. From the connection table, determine the tap to
which U2 should be connected.
Single-Phase Straight Design - Taps to the
If the Un - - Ux taps are to the right of the E2, and the
polarity mark is on the E2 tap, specify Utility Pol: REV. (See
Figure D.2.)
•
If the tap to which U2 is connected and the polarity
mark are to the left of E2 on the schematic, set UtilityPol:NORM.
•
If the tap to which U2 is connected is to the right of
E2 on the schematic, set UtilityPol:REV.
Examples
For both of the examples on the next page, use the
nameplate connection table shown in Table D.3:
Figure D.2
Right of E2
Single-Phase Straight Design - Taps to the
Table D.3
Nameplate for Single-Phase Straight Regulator with Cooling Fan
Single Phase Straight Regulator with Cooling Fan
Load
Volts
+/-10%
Volt Tran
Sec Conn
P2 to
Control Panel P to
P14 to
Basis
Volts
Aux Volts Motor
Conn U2 to Volts
Fan Connection
U21 to
U15 to
Volts
14400
P3 - 120
20
20
120
U3
126
U3
U7
240
13200
P4 - 120
20
20
120
U4
126
U53
U7
242
7200
P5 - 120
20
20
120
U6
126
U6
U8
240
From the table, the system load voltage is 7200 volts; therefore, U2 would be connected to U6. Now check the connection
diagram:
66
Siemens Energy, Inc.
Appendix D: Menu Parameters
EXAMPLE 1 (ref: Table D.3)
D.3.2
Three-Phase Regulators
In Figure D.3 below, U6 is to the left of E2. If your regulator nameplate looks like this, the proper specification is
Utility Pol:NORM.
Three-phase regulators may have either one or multiple
utility windings.
D.3.2.1 Single Utility Winding
A single utility winding provides power for the control, the
motor and the cooling fan. This utility winding may have
the polarity mark at the Un — Ux terminals or at the U5
terminal, as shown in the examples of Figure D.5.
Figure D.3
U6 to the Left of E2
EXAMPLE 2 (ref: Table D.3)
In Figure D.4 below, U6 is to the right of E2. If your regulator nameplate looks like this, the proper specification is
Utility Pol:REV.
Figure D.5
Winding
Three-Phase Regulator with a Single Utility
To determine whether the polarity is ‘Normal’ or ‘Reverse,’
examine the connection table and schematic diagram.
Figure D.4
U6 to the Right of E2
Siemens Energy, Inc.
•
If U2 is connected to a “U” terminal which is to the
left of E2, then UtilityPol:NORM (see Figure D.6).
•
If U2 is connected to a “U” terminal which is to the
right of E2, then UtilityPol:REV (see Figure D.7).
67
Appendix D: Menu Parameters
D.3.2.2 Multiple Utility Windings
Regulators with more than one utility winding utilize the
“A” phase utility winding for control and motor power, and
the “B” and “C” phase windings for fan(s) power. For this
case, use the Single phase procedure, defined above for
the “A” phase winding.
Figure D.6
U2 Connects to a “U” Terminal (U7 or U8) Which is to the Left of E2
Figure D.7
U2 Connects to a “U” Terminal (U7 or U8) Which is to the Right of E2
68
Siemens Energy, Inc.
Appendix E: Hazards of Bypassing a Regulator off Neutral
E Hazards of Bypassing a Regulator off Neutral
Deactivating the Control Panel Before Bypassing
DANGER
Operating regulator while bypassing will
result in explosion.
Will cause death, serious injury
or property damage.
Consult your voltage regulator instruction manual for
bypassing instructions.
To eliminate the possibility of inadvertent (and possibly
catastrophic) tap operations during bypassing operations,
it is mandatory that you completely disable the control
panel.
DANGER
Place regulator in neutral position before
bypassing and disable control panel.
Operating regulator while bypassing will
result in explosion.
Proper regulator bypassing procedure is of critical importance. Regulators that are not in the neutral position when
bypassed frequently fail. This failure is the result of
extremely high circulating current inside the regulator
caused by what is effectively a short circuit being placed
across the series winding. The result of such a failure
can be catastrophic.
Methods of Determining Neutral Tap Position
Since the tap changing mechanism is submerged in a tank
full of oil, some external means of determining tap position is mandatory. Methods most commonly used include:
•
•
The regulator tap Position Indicator provides first line
indication of the neutral position. On modern regulators, the tap changing mechanism drives the regulator
Position Indicator through gears or flexible shafts to
provide an accurate, reliable indication of the regulator tap position.
The MJ-4A & MJ-4B Control Panel is equipped with a
neutral indicating light (Neutralite). A switch mounted
on the tap changing mechanism actuates the light circuit. The circuit is activated when the regulator is in
the neutral position. A test switch on the MJ-4A &
MJ-4B Control Panel can be used to verify proper
operation of the Neutralite.
The Position Indicator and the Neutralite should all indicate
neutral before you attempt to bypass the regulator.
Methods other than the ones described above are also
used; however, the ones described above are the most
common and are recommended.
Will cause death, serious injury
or property damage.
Place regulator in neutral position before
bypassing and disable control panel.
Disable the MJ-4A control panel as follows:
1.
Disconnect the Polarized Disconnect Switch (PDS).
or
2.
Remove all MJ-4A fuses (Power, Sensing, and External Power); place MJ-4A power switch in Off position;
place Remote/Off/Manual switch in Off position; and
place the Tap Raise/Lower switch in Off position.
Disable the MJ-4B control panel as follows:
1.
Disconnect the Polarized Disconnect Switch (PDS)
or
2.
Push Auto/Manual switch until Auto Disabled LED is
ON, and leave the Raise and Lower keys in Off position.
Remove all MJ-4B fuses (Power, Sensing, and External Power); place MJ-4B power switch in Off position.
The regulator must be placed in neutral before bypassing.
If there is any doubt as to the location of neutral, the line
should be dropped before bypassing the regulator.
Siemens Energy, Inc.
69
Appendix F: Communications Module Installation
F Communications Module Installation
The MJ-4 Communications Module is mounted directly to
the Main Processor board. There are two versions of the
Communications Module:
•
Fiber Optic Communications Module, shown in Figure F.1.
•
RS-232/485 Communications Module, shown in Figure F.2.
Refer to the MJ-4Communications Module Installation
Manual (Siemens Manual # 21-115-527-024 for complete
information on installing and testing the Communications
Module.
Figure F.2
Figure F.1
70
RS-232/485 Communications Module
Fiber Optic Communications Module
Siemens Energy, Inc.
Appendix F: Communications Module Installation
This page left intentionally blank.
Siemens Energy, Inc.
71
Appendix G: Menu Structure Quick Reference
G
Menu Structure Quick Reference
Table G.1
<METER>
Max /Min
Vld
Max /Min
Vs
Max /Min
Vcomp
Max /Min
Ild
Max /Min
PF
Max /Min
KVA
Max /Min
KW
Max /Min
KVAR
Max /Min
Freq
KWHR F
KVAR HR
F lead
KVAR HR
F lag
KWHR R
KVAR HR
R lead
KVAR HR
R lag
Navigating the Menu and Fast-Path Keys
<FW DEMAND>
Max /Min
F Dmd Vld
Max /Min
F Dmd Vs
FDmdVcomp Max /Min
Max /Min
F Dmd Ild
PFKVA max
PFKVA min
F Dmd KW
F Dmd
Max /Min
KVAR
Max /Min
F Dmd KVA Max /Min
<REV DEMAND>
R Dmd Vld Max/Min
R Dmd Vs Max/Min
Max/Min
RDmd
Max/Min
Vcomp
R Dmd Ild
PFKVA max
PFKVA min
R Dmd KW
R Dmd
Max/Min
KVAR
Max/Min
R Dmd
Max/Min
KVA
<COUNTERS>
Op Count
Total Ops
Reset Date
Reset time
Elapsed Ops
24 Hr Ops
30 Day Ops
MTD Ops
Last Month Ops
YTD Ops
Last Year Ops
Tap position Max/Min
<REGULATOR>
Fwd Volts Volt Level
Bandwidth
Fwd BW
Fwd Delay Time Delay
Fwd Comp (R)
Fwd Comp (X)
Reactance
Rev Volts
Rev BW
Rev Delay
Rev Comp(R)
Rev Comp(X)
Alt Delay
VRC Stat VRC Select
VRC1 In
VRC2 In
VRC Mode
Local VRC%
VRC Stage 1
VRC Stage 2
VRC Stage 3
VRC Remote
MJ-3A VRC%
AutoVRCset1
AutoVRCset2
AutoVRC1 %I
AutoVRC2 %I
VLC Enable
VLC Upper
VLC Lower
72
Resistance
VLC Select
<CONFIGURE>
Tap Chngr
Type
Syst
DeltaPwr
Utility Pol
VprimaryMax
U2 PT
P2 PT
CT ratio
I Full Load
Pwr Flow (mode)
Basis Volts
NeutOvRun
Reset Min/Max?
Version
Memo 1
Memo 2
<ADV CONFIGURE>
Meter Volts
I Threshold %
I Shift
I Load Max
PT Threshold
Time
Date
Format (Date)
Daylight Sav
Dmd Type
Dmd Time
Dmd Subperiods
Min/Max t.o.
Screen t.o.
Quick t.o.
QuickDispTim
Auto Variamp
Soft Variamp
R Limit
L Limit
Slave-Master
TapAlert
Alrt
Tap Resync
CommAutoInh
DspScr
LowerLED
P2 Calc
U2/P2out
I Dir Bias
Bias %
Remote Btn
<ALERTS>
1st Alert Alert Select
...
Last Alert
Alerts:
Low current
Auto inhibit
Tap track error
Neutral sig. err.
Tap position???
Low PT Thresh
Overcurrent
NV RAM Reset
Low Battery
High Voltage
Not in Auto
R Limit Reached
L Limit Reached
Pseudo Manual
Siemens Energy, Inc.
Appendix G: Menu Structure Quick Reference
<LOG SETUP>
Log Event
Event = Tap
Event = Neut
Event = NN R
Event = NN L
Event = VLC
Event = VRC
Ev = PwrFlow
Ev = Pwr Cyc
Event = Cfg
Event = Alert
Clr EventLog?
Clr Interv Log?
Log Interval
ResLogMinMax
Log min/max
Interval
<EVENT LOG>
Event:NNNNN **
Date
Time
Cause
Vld
Vsrc
Ild
PF
KW
KVAR
KVA
Tap
Event:NNNNN-1:
Date
Time
Cause
Vld
Vsrc
Ild
PF
KW
KVAR
KVA
Tap
etc.
Siemens Energy, Inc.
<INTERVAL LOG>
INTERV: NNNNN**
Date
Time
Vld *
Vs
Ild *
PF
PF KVAmax
PF KVAmin
KW *
KVAR *
KVA *
Tap
Tapmax
Tapmin
Total Ops
INTERV: NNNNN-1
Date
Time
Vld *
Vs
Ild *
PF
PF KVAmax
PF KVAmin
KW*
KVAR*
KVA*
Tap
Tapmax
Tapmin
Total Ops
<HARMONICS>
Vld THD
Vs THD
Ild THD
Show Harm:
Show As:
Vld 1st
...
Vld 31st
Vs 1st
...
Vs 31st
Ild 1st
...
st
Ild 31
<COMMUNICATIONS>
Data Stat
DatPortBaud
Data Parity
DataPortAddr
Reg Id
Protocol
Comm Baud
Comm Parity
Comm Addr
Resync Time
Tx En Delay
DNP dl Confirm
CM SW RepeatEn
Host Addr
CM Unsolicited
AutoInhEnRemRL
DNPset
CM Vers
<MAINTENANCE>
ConsOv
MaintainRcrds?
TapChTy
BAL WIND
RangeofREG
CON_AB
CON_0
CON_1
CON_2
CON_3
CON_4
CON_5
CON_6
CON_7
CON_8
OPCNTA
OPCNTB
OPCNT0
OPCNT1
OPCNT2
OPCNT3
OPCNT4
OPCNT5
OPCNT6
OPCNT7
OPCNT8
OP_Dur
<DIAGNOSTICS>
U2 Cal
P2 Cal
C/C2low
C/C2med
C/C2high
MP BD VERS
PWR BD VERS
MP MASK VERS
Ser No.
Product Rev.
Checksum
CM Test?
CM TestStat
Panel Type
R/L OnTime
R/L OffTime
FixedR/LOntime
TapChgT/O
Tap In
TapInType
TapInPulse
PreTapTime
PostTapTime
Neutral In
Neutral Count
<PASSWORDS>
Enter PW
End Session?
System Key
Level 1
Level 1 PW
Configure
Config PW
Regulator
Reg.PW
Meter
Meter PW
Demand
Demand PW
Alert
Alert PW
Counters
Counters PW
Log Setup
Log Setup PW
Ev/Intv
Ev/Intv PW
Harmonics
Harmonics PW
Comm
Comm PW
Mntn
Mntn PW
Diagnostics
Diagnostics PW
73
Appendix H: MJ-4A & MJ-4B Firmware Versions
H
MJ-4A & MJ-4B Firmware Versions
This version of the MJ-4A & MJ-4B Installation and Operation Manual describes the MJ-4A & MJ-4B firmware Version 4.111.
Version 4.111: Production release of MJ-4A & MJ-4B,
Added Option for TLS and TLH in maintenance calculation.
Version 4.11: Production Release of MJ-4A & MJ-4B.
Version 4.10: Initial release fo MJ-4A & MJ-4B.
74
Siemens Energy, Inc.
+P
BAL
Siemens Energy, Inc.
U112
HS
U12
3
J21
3
P2
4
J22
4
6
C2
5
E
6
U_REM U_REM
5
E1
7
K22
7
U2
8
K21
8
J
9
U7
9
K
10
U6
10
U10
11
U6
11
U11
12
U
12
Figure I.1 Terminal Strip Connections for Siemens Regulator
2
1
P2A
2
1
IN+
3
IN
4
INHIB
OUT
OUT+
U12
P2
C2
E
E1
U2
J
K
U10
U11
PDS
2
4
NO
3
C
6
5
6
VRC1+ VRC1
5
AUXIN+ AUXIN
INHIB AUXOUT AUXOUT
NC
2
AUXOUT INHIB
1
INHIB
J30
1
8
STAT
7
MAN_
COM
8
R/M_
VRC2+ VRC2
7
STAT
9
REM_
J412
9
11
C
P2SW
12
P3A
C2
12
P3B
11
ICIRC+ ICIRC
10
C8_66A
10
I
P2B
Figure I.1 below shows the external connections for the MJ-XL terminal strip when connected to a Siemens Regulator.
Appendix I: Terminal Strip Wiring
Terminal Strip Wiring
75
Appendix J: MJ-4A & MJ-4B Jumpers and Battery Replacement
J MJ-4A & MJ-4B Jumpers and Battery Replacement
J.1
MJ-4A & MJ-4B Jumpers
The locations of the MJ-4 jumpers and battery are shown in the drawing below. The table on the next page describes the
jumpers and the default settings.
2
1
JP9
SIEMENS MJ
1 2
J2
Jumpered for DCE
(Default)
No Jumpers
(Default)
1
2
3
Jumpered for DTE
1
2
3
1
2
3
J23 J22
1
2
3
J23 J22
1
2
3
1
2
3
J23 J22
Battery (BT1)
Pins 1 & 2 No Jumper
(Default)
J1
1
2
Pins 1 & 2 Jumpered
(Default)
2
1
J1
1
J9
2
2
Figure J.1
76
1
J9
MJ-4A & MJ-4B Jumpers.
Siemens Energy, Inc.
Appendix J: MJ-4A & MJ-4B Jumpers and Battery Replacement
Table J.1
MJ-4A & MJ-4B Jumper Descriptions and Default Connections
Jumper
Default Shunt
Location
Description
J1
Out
This jumper shorts signals C&C2 (P3B-11&12). J1 is a redundant jumper, since MJ-4 ships from the
factory with a terminal strip jumper across P3B-11&12. With either jumper installed, the terminal strip,
the CT current path for the regulator is complete. Removing both the terminal strip jumper and the J1
jumper allow for an external "auxiliary apparatus" (e.g., an external current meter) to be connected in the
CT current path.
Caution: Open circuiting the C&C2 connections may damage the regulator Current Transformer
(CT). Keep C&C2 shorted unless connected to an appropriate external current-handling device.
J9
In
J9 determines the signal path for the "External Source" power.
With J9 installed, the External Source signal comes from the Yellow banana plug on the front panel.
With J9 removed, the External Source signal comes from "J412" (P3B-9).
Caution: Do not connect AC sources to both "J412" and the External Source (yellow) banana
plug while J9 is installed. Be sure that J9 jumper is un-installed before making an AC Source
connection to J412.
J22
1-2
Selects DCE/DTE for MJ-4 data port. (See also J23.)
1-2: DCE (default)
2-3: DTE
J23
1-2
Selects DCE/DTE for MJ-4 data port. (See also J22.)
1-2: DCE (default)
2-3: DTE
The following jumpers are not installed:
J2 (factory use only)
JP9 (microprocessor reset for factory use).
2.
Remove the MJ-4 from the weather-proof enclosure
(i.e., lift it off of the hinges.)
3.
Remove the side screws from the unit. (There are 4.)
Battery Replacement
4.
Curl back the cable clamp on the back of the unit and
remove the cable bundle from the reusable cable
clamp.
5.
Note: Replace the MJ-4 battery within 1 month of an
active "Low Battery" message to avoid data
loss.
Lift and move the rear cover away from the front
panel.
6.
Remove the coin-cell battery (BT1) from its socket.
See Figure J.1 on the previous page for battery location.
To replace the MJ-4 battery, you will:
7.
Put the new coin-cell battery in the battery socket,
making sure you have the proper orientation ("+" side
up.)
8.
Close the unit by reversing the steps outlined above.
9.
Turn the power on and verify that the unit comes up
and displays the <METER> menu heading. If the unit
fails to come up, retrace the above steps to make
sure that the battery has been properly oriented and
inserted.
Note:
J.2
This section provides instructions for replacing the MJ-4
battery.
1.
2.
3.
Remove the MJ-4 rear cover,
Remove and replace the coin-cell battery.
Close up the unit and reconnecting power.
Replacement Battery
Radio Shack carries replacement batteries for the MJ-4.
The battery is a 3 volt coin-cell type Lithium cell, Panasonic
BR2032 or equivalent.
Replacement Procedure
During the following procedure, use proper Electro-Static
Discharge (ESD) precautions. If possible, use an ESD wrist
strap. If no wrist strap is available, touch a grounded surface before beginning. (Two accessible ground points are
the screw jacks of the Data Port connector.)
1.
Turn off power to the MJ-4 and disconnect the PDS
jack (the 10-contact connector with the two wingnuts.)
Siemens Energy, Inc.
10. After replacing the battery, verify the Low Battery
Message is no longer active.
What is Backed Up?
There are two types of memory on the control: an EPROM
where all of the settings/configuration are stored, which
does not require power to retain information, and the battery backed static RAM where the time/date, min/max values, tap position, data logs, and DNP Configure points are
stored. The MJ-4 Panel has a Super capacitor, which
ensures data in non-volatile memory be retained when the
battery has to be replaced. Data is lost only when both the
capacitor is fully discharged and the battery is dead.
77
Appendix K: Terminal Strip Connections
K Terminal Strip Connections
Table K.1 below describes the connections for terminal strip P2A.
Table K.1
Connections for Terminal Strip P2A
Pin Number
Signal Name
1
HS
For Cooper Regulators Only. "Hold Switch" connection. Applies power to tap changer
to complete tap change after "Hold Switch" contact makes.
Description
I/O / Power
Power
2
U112
For Cooper Regulators Only. Neutral Position Indication. When closed to AC hot, indicates tap changer is in neutral position. Turns on Neutralite.
Input
3
U12*
High side of neutral position indicator. When closed to AC ground ("E"), indicates tap
changer is in neutral position. Turns on Neutralite.
Input
4
P2*
Potential Transformer output (if present).
5
C2*
High side of Current Transformer. [C2 terminal at P3B-12 is normally externally jumpered to C at P3B-11.]
Power/Sense
Input
6
E*
Neutral return for Control Panel, PT, and Utility winding. Chassis ground.
Ground
7
E1*
Low side of Current Transformer.
Ground
8
U2*
High side of Utility (Tertiary) winding. Control Panel derives "Normal" power from this
signal. Provides voltage phase reference for power flow direction.
9
J*
Terminal J - Tap Changer Motor Raise signal.
Output
10
K*
Terminal K - Tap Changer Motor Lower signal.
Output
11
U10*
High side of Operation Counter switch. Closes to E. Indicates when a tap change has
occurred.
12
U11*
High side of Regulator Drag Hands Reset solenoid. Returns to E. Used to reset the
drag hands of the Tap Position Dial mounted on the regulator.
Power/Sense
Input
Output
* indicates standard "Polarized Disconnect Switch (PDS)" signals. For Siemens regulators, these ten signals connect to the
corresponding pins of the PDS connector block.
78
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Appendix K: Terminal Strip Connections
Table K.2 below describes the connections for terminal strip P2B. See Table 2.5 for complete descriptions of these terminal
connections. See Figure 2.3 for simplified schematic drawing of remote control connections.
Table K.2
Connections for Terminal Strip P2B
Pin Number
Signal Name
1
BAL
This signal is actually E, (AC return.) The intended application of this signal is in conjunction with +P to permit the MJ-4 sense voltages to be adjusted by the value
present on an external transformer winding. The transformer winding is inserted into
the MJ-4 circuit at +P and BAL.
Ground
2
+P
This signal connects to one side (the "ground" side) of the MJ-4 sense transformers.
See description for BAL.
Input
3
J21
This signal connects to the J Relay output of the MJ-4. Normally, this signal is jumpered to J22 to complete the MJ-4 Raise motor circuit. Alternatively, a relay (or switch
contacts) can be connected across the J21/J22 contacts to provide external control
over the MJ-4 automatic Raise motor circuit.
Output
4
J22
This signal is wired to J [P2A-9]. J22 is normally jumpered to J21. Alternately, J22 can
be connected to an external motor control signal.
Input
5
U_REM (R)
This signal gets AC power from U6 when the Remote-Auto/Off/Manual switch is in the
Remote/Auto position. This signal is provided so that external relay contacts can be
connected from Rem R to J22 (the Raise motor control signal). MJ-4A ONLY
Power
6
U_REM (L)
This signal gets AC power from U6 when the Remote-Auto/Off/Manual switch is in the
Remote/Auto position. This signal is provided so that external relay contacts can be
connected from Rem L to K22 (the Lower motor control signal). MJ-4A ONLY
Power
7
K22
This signal connects internally to the K signal (Lower motor control). This signal is normally jumpered to K21, but it can be connected to an external motor control signal.
Input
8
K21
This signal connects to the K Relay output of the MJ-4. Normally, this signal is jumpered to K22 to complete the MJ-4 Lower motor circuit. Alternatively, a relay (or switch
contacts) can be connected across the K21/K22 contacts to provide external control
over the MJ-4 automatic Lower motor circuit.
Output
9
U7
This circuit provides AC power to K7, which provides power to the J and K relays. The J
and K relays implement the MJ-4's automatic tap control operations. This signal is normally jumpered to U6, but it can be connected to an external AC source. [Alternatively,
an external relay contact can be placed between the U6 and U7 contacts for external
control of the MJ-4 automatic tap operations.]
Power
10 & 11
U6
This signal provides AC power for both Remote and Manual tap control operations.
This circuit provides AC power to the common of the Tap Raise/Lower switch when
the Remote-Auto/Off/Manual switch is in the Manual position. This circuit provides the
AC power to the Rem R and Rem L terminal block contacts when the Remote-Auto/
Off/Manual switch is in the Remote position. It is normally jumpered to U at the terminal block, but it can be connected to an external AC source. [Alternatively, an external
relay contact can be placed between the U and U6 contacts for external control of the
MJ-4 manual and remote operations.]
Power
12
U
This is the signal from U2, after the power switch (assuming the switch is in the "Normal" position.) This signal is normally jumpered to U6 at the terminal block unless an
external circuit is used to feed U6.
Power
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Description
I/O / Power
79
Appendix K: Terminal Strip Connections
Table K.3 below describes the connections for terminal strip P3A
Table K.3
Connections for Terminal Strip P3A
Pin Number
Signal Name
Description
I/O / Power
1 &2
INHIB OUT+
& INHIB OUT-
Inhibit Out is activated (closed) whenever the MJ-4 automatic mode operation is
inhibited by either the Automatic Inhibit Input or by Communication link.
Relay Output
3
AUXOUT C
4
AUXOUT NO
5&6
AUXIN+
& AUXIN-
7
Common contact of Auxiliary Relay.
Output
Normally-open contact of Auxiliary Relay.
Output
Auxiliary input contact pair. For future definition.
Contact Closure
Input
MAN_STAT
When closed to R/M COM it indicates that the MJ-4A is in the Manual Operating
Mode. The RA/O/M switch is in the Manual position. MJ-4A ONLY
Switch Closure
Output
8
R/M COM
Common contact of the SPDT Remote-Automatic/Off/Manual (RA/O/M) switch.
[Use with Man_stat and Rem_stat.] MJ-4A ONLY
Switch Closure
Output
9
REM_STAT
When closed to R/M COM it indicates that the MJ-4A is in the Remote Operating
Mode. The RA/O/M switch is in the Remote-Auto position. MJ-4A ONLY
Switch Closure
Output
10 & 11
ICIRC+
& ICIRC-
12
P2SW
Reserved for Circulating Current Input signal pair. (0 - 640 mA, AC.)
Current Input
P2 signal after the Power Switch. Used for externally monitoring the P2 voltage signal.
Output
Table K.4 below describes the connections for terminal strip P3B
Table K.4
Pin Number
80
Connections for Terminal Strip P3B
Signal Name
Description
I/O / Power
1
J30
2
AUXOUT NC
Normally-closed contact of Auxiliary Output Relay. (See P3A-3.)
Spare connection for future application.
3&4
INHIB IN+
& INHIB IN-
INHIB IN directly disables the MJ-4 motor control relays. Through the microprocessor, this signal asserts Automatic Inhibit of motor Raise/Lower operations, and activates the Auto Inhibit Indicator.
Contact closure
(Input)
5&6
VRC1+
& VRC1-
These contacts are used to activate VRC (both MJ-3ATM mode and MJ-X mode).
They are also used for External Line Drop Compensation Polarity Control.
Contact closure
(Input)
7&8
VRC2+
&VRC2-
These contacts are used to activate VRC Enable 2 for MJ-X mode. They are also
used for Alternate functions: Alternate Time Delay and Low External Battery.
Contact closure
(Input)
9
J412
10
C8_66A
11 & 12
C & C2
Relay Output
Alternate signal source for “External Power” if jumper J9 is removed. See Table J.1.
Reserved for future application.
C & C2 (P3B-11&12) provide access to the regulator current path for connecting
auxiliary apparatus (e.g., an external current meter.) The current ranges from 0 to
640 mA nominal, into a low impedance load.
C&C2 have redundant jumpers. As shipped from the factory, there is a jumper
across the terminal strip pins, and there is an on-board jumper "J1".
[Both the terminal strip jumper and on-board jumper (J1) need to be removed if
external equipped is connected.]
Caution: Open circuiting the C&C2 connections may damage the regulator
Current Transformer (CT). Keep C&C2 shorted unless connected to an appropriate external current-handling device.
Current
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Appendix L: MJ-4A & MJ-4B Operating Procedures
L MJ-4A & MJ-4B Operating
Procedures
View/Set Time Delay Value
1.
Press Time Delay Fast-Path key
2.
Read time delay on display
View Instantaneous Load Voltage (Vld)
3.
Press Change key - right hand digit will flash
1.
Press Menu key twice
4.
2.
Press Down Arrow once
Press Left Arrow key to move left on display or Right
Arrow key to move right on display
3.
Read voltage (Vld) on display
5.
Press Up/Down Arrow key to increase or decrease
time delay on display - flashing digit will change
View/Reset Max/Min Values
6.
Press Save key to save the new time delay value
1.
View Meter value or tap position
View/Set Line Drop Compensation Values
2.
Press Max/Min key once
1.
Press Resistance Fast-Path key
3.
Read maximum value on display
2.
Read resistive compensation voltage (R) on display
4.
To reset maximum value on display, press Cancel
Reset key once
3.
Press Change key - right hand digit will flash
5.
Press Max/Min key again
4.
Press Left Arrow key to move left on display or Right
Arrow key to move right on display
6.
Read minimum value on display
5.
7.
To reset minimum value on display, press Cancel
Reset key once
Press Up/Down Arrow key to increase or decrease
compensation voltage on display - flashing digit will
change
6.
Press Save key to save the new resistive compensation voltage value
Use the following instructions as a quick reference for performing many of the standard MJ-4 operating procedures.
View/Set Forward Voltage Level Value
1.
Press Voltage Level Fast-Path key
7.
Press Resistive Fast-Path key again
2.
Read Voltage Level on display
8.
Read Reverse resistive compensation voltage (R) on
display
3.
Press Change key - right hand digit will flash
9.
4.
Press Left Arrow key to move left on display or Right
Arrow key to move right on display
Repeat steps 3 to 6 above to set the resistive compensation voltage
5.
Press Up/Down Arrow key to increase or decrease
desired voltage on display - flashing digit will change
6.
Press Save key to save the new Voltage Level
View/Set Bandwidth Value
1.
Press Bandwidth Fast-Path key
2.
Read Bandwidth on display
3.
Press Change key - right hand digit will flash
4.
Press Left Arrow key to move left on display or Right
Arrow key to move right on display
5.
Press Up/Down Arrow key to increase or decrease
desired bandwidth on display - flashing digit will
change
6.
Press Save key to save the new Bandwidth setting
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10. Press Reactance Fast-Path key
11. Read the Forward reactive compensation voltage (X)
on display
12. Repeat steps 3 to 6 above to set the Forward reactive
compensation voltage
13. Press Reactance Fast-Path key again
14. Read Reverse reactive compensation voltage (X) on
display
15. Repeat steps 3 to 6 above to set the Reverse reactive
compensation voltage
View Operation Counter Values
1.
Press Operation Counter Select Fast-Path key (Op
Count)
2.
Read Total Ops count on display
81
Appendix L: MJ-4A & MJ-4B Operating Procedures
3.
Press Op Count key repeatedly to step through
remaining counter values
View Messages
1.
Press Messages Fast-Path key
2.
Read and note active message on display
3.
Press Messages key repeatedly to step through
remaining active messages
4.
While viewing message, press Cancel Reset key to
acknowledge message
5.
Note: Acknowledging message does not clear the
fault that caused the message
Configure the Control Panel
10. Press Down Arrow key to display the DATE item
11. Press Change key - the left hand digit will flash
12. Press Up/Down Arrow key to increase or decrease
the value
13. Press Right Arrow to step to the next digit to be
changed
14. Press Save key to save the new date
Using a Voltmeter to Calibrate U2 or P2
Note: Do not use voltage readings at the Voltage Calibration (Test) terminals as an indication of the
regulated load voltage
1.
Connect true-rms-reading voltmeter to Voltage Calibration (Test) terminals
2.
Press U2 P2 key to display U2 (or P2) Cal item on the
display.
3.
If voltmeter reading is not the same as U2 (or P2) Cal
item, press Change
4.
At password prompt, press Up/Down Arrow key to
enter first digit of password (See Manual Chapter 4)
1.
Press Menu key twice
2.
Press Right Arrow key five times to view the <CONFIGURE> menu
3.
Press Up/Down Arrow key to display the desired
item.
4.
Press Change key
5.
Press Left Arrow or Right Arrow to step through digits
in numeric values
5.
Press Right Arrow key to step through remaining digits and enter values
6.
Press Up/Down Arrow to toggle through text choices
or to increase or decrease numeric values
6.
Press Save key to submit password
7.
Press Save key to save the new value
7.
If password is correct, press Change key - right hand
digit will flash
8.
Repeat steps 3 through 7 for all desired configuration
items
8.
Press Up/Down Arrow key to increase or decrease
value until U2 (or P2) Cal value is equal to the voltmeter value
9.
Press Save key to save the new calibration value
View/Set the Clock (Time and Date)
1.
Press Menu key twice
2.
Press Right Arrow key six times to view the <ADV
CONFIGURE> menu
3.
Press Down Arrow until the TIME item is displayed.
4.
Press Change key - the left hand digit will flash
5.
Press Up/Down Arrow key to increase or decrease
the value
1.
Display Tap= in <COUNTERS> menu
2.
Press Change key
6.
Press Right Arrow to step to next digit
3.
7.
When all of the digits are set, press Right Arrow key
until A or P is flashing
Press Up/Down Arrow key until reading matches regulator Position Indicator value
4.
Press Save key to save new value.
8.
Press Up/Down Arrow key to toggle between A and P
9.
Press Save key to save the new time
82
10. See Manual Chapter 6 for additional calibration procedures
Set Tap Position
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Symbols
+/- Polarity Select Key 7
A
Acknowledging Messages 44
ADV CONFIGURE Menu 19, 24–26
Alerts
Enable/Disable 26
Alrt M=? C=? S=? 26
ALT Delay 29
Apparent Power 40
Auto / Manual Key 8
Auto Variamp 25
Auto/Manual Switch 10
Automatic Mode 46
B
Band Indicator LEDs 9
Bandwidth Key 6
Bandwidth Setpoint 29
Basis Volts 23
Battery Replacement 76
Baud 14
Bi-directional Mode 23
Binding Posts 11
Bypassing a Regulator 69
C
Calculated voltage 39
Calibrate U2 or P2 82
Cancel/Reset Key 6
Change Key 5
Changing Alpha or Numeric Settings 17
Changing Configuration Parameters 16
Changing Data 16
Changing Passwords 34
Co-Generation Mode 23
Communications Auto Inhibit 26
Communications Definition 18
COMMUNICATIONS Menu 18, 35, 45
Communications Module 36
Communications Module Installation
Fiber Optic 70
Compensation Multipliers 65
Configuration 18
CONFIGURE Menu 18, 22–24, 63, 65
Configure the Control Panel 82
Connections 75
Connections, Terminal Strip 78
Control Modes
Automatic 46
Manual 46
Off 46
Remote 46
Supervisory Control Disabled 47
Supervisory Control Enabled 46
Cooper Regulators 2
COUNTERS Menu 43
Current Calibration 56
Current Circuit Terminal Block 12
Current Shift 24
Current Threshold 24
Current Transformer Ratio 23
D
Data Display 5
Data Port address 14
Data Port Addresses 36
Date 25
Date Format 25
Daylight Savings Time 25
DCE 14
Dead Reckoning 43
DEMAND Menus 41
Demand Methods 25
Sliding Window 25
Thermal 25
DIAGNOSTICS Menu 37
Diagrams 61
Display Screen 5
Displaying Data 15
Distribution Line Resistance and Reactance 64
Download page 64
Downloading files 2
Drag Hands Reset Switch 8
Dsp Scr (Default Display Screen) 26
DTE 14
E
EVENT LOG Menu 41
Clearing the Event Log 42
Displaying Event Data 42
Event Logging 31
External Power Source Protection Fuse 11
External Source Binding Posts 11
F
Fast-Path Keys 6, 15, 17
+/- 7
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Bandwidth 6
Messages 7
Operations Counter 7, 8, 9, 39
Quick Key 8
Reactance 7
Resistance 7
Time Delay 7
Voltage Level 6
Voltage Limit Control 7
Voltage Reduction Control 7
Field Maintenance 60
Format Date 25
Forward Locked Mode 23
Forward Reactive Energy 41
Forward Real Energy 41
Forward/Reverse Operation 49
Frequency 40
Full Load Current 23
Function display timeout 23
Fuses 11
K
G
Main Processor Board Version 37
Max/Min Key 6
Maximum Load Current 24
Memo 24
Menu Key 5
Menu Selection Key 15
Menu Selection Keys 5
Menus 15
Messages
Acknowledging 44
Messages LED 8
MESSAGES Menu 44
METER Menu 39
Data Items 40
Meter Volts 24
Microprocessor Mask Version 37
Min/Max Reset 24
Min/Max Time and Date Stamps 39
Min/Max Time-out 25
MJ-4 Front Panel 5
MJXplorer 54
MJXtra 54
GE Regulators 2
H
Hardware Configuration Items 37
HARMONICS Menu 45
Hazards 69
I
I Threshold % 24
Idle Reverse Mode 23
Indicators 8
Motor Active 9
Neutralite 10
Reverse Power Flow 8
SC Disabled 9
Voltage Limit Control (VLC) 10
Voltage Reduction Control Active 10
Installation 59
Fiber Optic Communications Module 70
INTERVAL LOG Menu
Clearing the Interval Log 42
Displaying Interval Data 42
Interval Logging 32
J
Jumpers 76
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kVAR 40
kW 40
L
L Limit 26
Leading and Lagging Regulators 63
Line Drop Calculator 64
Line Drop Compensation 29, 40, 63
Load Volts 40
Local Data Port 14
LOG SETUP Menu 18, 31
Logging Requirements 18
Low Current Threshold 24
Lower Key 7, 8
LTCs 2
M
N
Navigating the Menu 72
Neutral Overrun 24
Neutral Reverse Mode 23
Neutralite Indicator 10
Neutralite Test Switch 8
Normal/External Source Switch 10
O
Operating Procedures 81
Operation Counter Select Key 7
P
P2 Calculation 39
P2 Potential Transformer 22
Parity 14
PASSWORD Menu 18, 32–35
Password Security Activated 34
PDS 59
Polarized Disconnect Switch 59
Potential Transformer 22
Potential Transformer Threshold 24
Power Flow Direction 48
Power Flow Modes 23, 50–53
Bi-directional 23, 52
Co-generation 23, 53
Forward Locked 23, 51
Idle Reverse 23, 52
Neutral Reverse 23, 53
Reverse Locked 51
Reversed Locked 23
Tap Changer Direction 50
Power Fuse 11
Q
Quick Display Time 25
Quick Key 8
Customizing your Quick List 37, 38
Viewing the Quick List 38
Quick Reference 72
Quick reference 81
Quick Time Out 2, 25
R
R Limit 26
Raise and Lower Switches 10
Raise Key 7, 8
Reactance Key 7
Real Power 40
Reference, quick 81
Regulator Control Diagrams 61
REGULATOR Menu 18, 28, 45, 63
Regulator Setpoints 29
Bandwidth 29
Time Delay 29
Voltage Level 29
Regulator Type 22
Remote Mode
MJ-3A 30
MJ-X 30
Replacement, Battery 76
Replacing existing MJ-4 Control Panels 60
Replacing Older Control Units 59
Resistance Key 7
Retrofitting 19
Reverse Locked Mode 23
Reverse Power Flow 48
Reverse Power Flow LED 8
Reverse Reactive Energy 41
Reverse Real Energy 41
S
Save Key 6
Schematic Diagrams 61
Screen Time Out 25
Scroll Keys 5, 15
Security Definition 18
Self Test 57
Sensing Fuse 11
Set Tap Position 82
Setpoints 18
Setup 18
Siemens Website 2
Slave-Master 26
Soft Variamp 26
Software
Communications 54
Uploading 54
Source Volts 40
Specifications 58
Supervisory Control Switch 10
Support Documentation 2
Switch Settings 59
Switches 10
System Key 34
System Wiring Configuration 22
T
Tap Alert 26
Tap Changer Type 22
Tap Position Limits 26
Tap Resync 26
Terminal Blocks 12, 60
Terminal Strip 75
Terminal Strip Connections 78
Thermal Method 25
Time Delay Key 7
Time Delay Setpoint 29
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Time of Day 24
Top Terminal Block 12
Transformer Polarity 65
Single-Phase Regulators 65
Troubleshooting
Alert Messages 55
Communications Module 57
Introduction 55
Messages 55
Tap Tracking 57
U
U2 Potential Transformer 22
Utility Polarity 22
Utility Winding 67
V
View Instantaneous Load Voltage 81
View Messages 82
View Operation Counter Values 81
View/Reset Max/Min Values 81
View/Set Bandwidth Value 81
View/Set Forward Voltage Level Value 81
View/Set Line Drop Compensation Values 81
View/Set the Clock (Time and Date) 82
View/Set Time Delay Value 81
Viewing Messages 44
Voltage Calibration 56
Voltage Calibration Binding Posts 11
Voltage Level Key 6
Voltage Level Setpoint 29
Voltage Limit Control 31, 48
Voltage Limit Control Select Key 7
Voltage Reduction Control 29
Voltage Reduction Control Active Indicator LED 10
Voltage Reduction Control Select Key 7
Voltage Sensing and Correction 48
Vprimary Max 22
VRC Mode 30
AUTOMATIC (with Remote Override) 30
LOCAL 30
OFF 30
REMOTE 30
VRC Status 29, 45
VRC1 In 29
VRC2 In 29
W
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Siemens Energy Inc.
P.O. Box 6289
Jackson, MS 39288
Manual No. 21-115527-023 rev02
1M 0200TD Printed in U.S.A.
© 2009 Siemens Energy Inc..
SIEMENS is a registered trademark of Siemens AG.