Littelfuse ProtectionRelays AF0500 Manual

Arc-Flash Relay
AF0500
AF0500
ARC-FLASH RELAY
14
15
16
17
18
19
TRIP COIL 1
20
21
22
23
24
TRIPPED
13
COM
TRIPPED
12
TRIP
ERROR
11
C/B ON
SUPPLY 1
10
INHIBIT
100 - 240VAC/VDC
9
TRIPPED
8
COM
7
TRIP
6
C/B ON
5
4
INHIBIT
3
C/B FAIL
2
L1/+
COM
1
N/L2/–
RESET
REVISION 0-D-040816
25
26
27
TRIP COIL 2
ARC-FLASH RELAY
AF0500
USB
SUPPLY 2
24 - 48VDC
28
+
29
–
30
SENSOR 1
ETHERNET
PORT 1
SENSOR 2
SENSOR 3
SENSOR 4
PORT 2
5V
31
TX
32
RX
33
0V
34
5V
35
TX
36
RX
37
0V
38
5V
39
TX
40
RX
41
0V
42
5V
43
TX
44
RX
45
0V
46
Document Number: PM-1420-EN
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
TABLE OF CONTENTS
1
KEY FEATURES ..................................................................................................................... 7
1.1
1.2
1.3
1.4
1.5
Easy Installation ...................................................................................................................... 7
Fail-Safe Installation ................................................................................................................ 8
Fast Error and Fault Location .................................................................................................. 8
Ethernet Communication ......................................................................................................... 8
USB Interface .......................................................................................................................... 8
2
ARC-FLASH PROTECTION SYSTEM DESIGN ..................................................................... 9
3
SENSOR PLACEMENT......................................................................................................... 12
3.1
3.2
3.3
General Guidelines ................................................................................................................ 12
Switchgear Protection ............................................................................................................ 12
Transformer Protection .......................................................................................................... 12
4
OPTICAL SENSORS ............................................................................................................. 13
4.1 PGA-LS10 Photoelectric Point Sensor with Sensor Check ................................................... 14
4.1.1 PGA-LS10 Connection ........................................................................................................ 15
4.1.2 PGA-LS10 Installation ......................................................................................................... 16
4.2 PGA-LS20 and PGA-LS30 Fiber-Optic Sensors with Sensor Check .................................... 17
4.2.1 Fiber Connection ................................................................................................................. 17
4.2.2 Receiver Wiring Connections .............................................................................................. 17
4.2.3 Transmitter Wiring Connections .......................................................................................... 17
4.2.4 PGA-LS20 and PGA-LS30 Connection ............................................................................... 18
4.2.5 Fiber-Optic Sensor Adjustment ........................................................................................... 19
4.2.6 Sensor Adjustment For a Fiber Length Other Than 60 cm (24 in)....................................... 19
5
APPLICATION EXAMPLES .................................................................................................. 20
5.1 Basic Scenario: One Sensor – One Circuit Breaker .............................................................. 20
5.2 Two Independent Trip Zones ................................................................................................. 21
5.3 Two Zones Combined To One By Cabling ............................................................................ 22
5.4 Several Zones Combined To One By Cabling ....................................................................... 23
5.5 Upstream Circuit Breaker Trip on Local Circuit Breaker Fail ................................................. 24
5.6 Main-Tie-Main using PGA-1100 Logic Diode Unit ................................................................. 24
5.7 Main-Tie-Main from a Dedicated AF0500 Zone..................................................................... 26
5.8 Total Clearing Time ............................................................................................................... 26
5.8.1 Arc-Detection Delay ............................................................................................................. 26
5.8.2 Circuit Breaker Operating Time ........................................................................................... 26
5.8.3 Total Clearing Time Examples ............................................................................................ 27
5.8.4 Total Clearing Time for Upstream Circuit Breakers In Case of a Circuit Breaker Failure .... 27
6
INSTALLATION AND TERMINALS ....................................................................................... 29
6.1 Power Supply ........................................................................................................................ 30
6.1.1 Line AC Supply .................................................................................................................... 30
6.1.2 Station Battery DC Supply ................................................................................................... 30
6.1.3 Auxiliary DC Supply ............................................................................................................. 31
6.1.4 Supply Surveillance ............................................................................................................. 31
6.2 Common I/O Block ................................................................................................................ 31
6.2.1 ERROR Signal Relay .......................................................................................................... 31
6.2.2 TRIPPED Signal Relay ........................................................................................................ 32
6.2.3 C/B Fail Output .................................................................................................................... 32
6.2.4 RESET Input ........................................................................................................................ 32
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
6.3 Trip Zone I/O ......................................................................................................................... 32
6.3.1 INHIBIT Input ....................................................................................................................... 33
6.3.2 TRIP Input ........................................................................................................................... 33
6.3.3 C/B ON Input ....................................................................................................................... 33
6.3.4 TRIPPED Output ................................................................................................................. 33
6.4 TRIP COIL Output ................................................................................................................. 34
6.5 Sensors ................................................................................................................................. 34
6.5.1 Zone Association ................................................................................................................. 34
6.5.2 Light Immunity Adjustment .................................................................................................. 34
6.5.3 Extending or Shortening Cable Length ................................................................................ 35
6.6 Ethernet ................................................................................................................................. 35
7
USER INTERFACE ............................................................................................................... 36
7.1 Reset Button .......................................................................................................................... 36
7.2 LED Indications ..................................................................................................................... 36
7.3 USB Configuration Software .................................................................................................. 39
7.3.1 USB Configuration Software – Screen Examples ............................................................... 40
7.4 USB Event Log ...................................................................................................................... 46
7.5 Firmware Upgrade ................................................................................................................. 47
8
COMMISSIONING ................................................................................................................. 48
8.1
8.2
8.3
8.4
Configuration of Installed Sensors ......................................................................................... 48
Testing the Sensors ............................................................................................................... 48
Testing the Trip Coil Outputs and Associated Circuit Breakers ............................................. 49
Full Operation Test ................................................................................................................ 49
9
SUPPORT RESOURCES ..................................................................................................... 51
9.1
Sending Information for Support ............................................................................................ 51
10
SPECIFICATIONS ................................................................................................................. 52
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
AF0500 .................................................................................................................................. 52
EMC Tests ............................................................................................................................. 54
Environmental Tests .............................................................................................................. 55
Safety .................................................................................................................................... 55
Certification ............................................................................................................................ 56
Sensors ................................................................................................................................. 57
Ordering Information .............................................................................................................. 58
Related Products ................................................................................................................... 58
Warranty ................................................................................................................................ 58
APPENDIX A: MODBUS TCP REGISTER MAP ............................................................................ 59
APPENDIX B: INSTALLATION LOG SHEET ................................................................................. 64
APPENDIX C: REDUNDANT TRIP CIRCUIT DESCRIPTION ....................................................... 67
APPENDIX D: AF0500 REVISION HISTORY ................................................................................ 68
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
LIST OF FIGURES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
AF0500 Default Trip Zones ..................................................................................................... 8
AF0500 Typical Wiring Diagram ............................................................................................ 10
AF0500 24-Vdc Source Typical Wiring Diagram ................................................................... 11
PGA-LS10 Detection Range for a 3 kA Fault ........................................................................ 14
PGA-LS10 Connection Diagram ............................................................................................ 15
PGA-LS10 Mounting Detail.................................................................................................... 16
PGA-LS20 and PGA-LS30 Connection Diagram................................................................... 18
Basic AF0500 Configuration .................................................................................................. 20
AF0500 with Two Independent Trip Zones ............................................................................ 21
AF0500 with Two Trip Zones Combined ............................................................................... 22
AF0500 with Several Trip Zones Combined .......................................................................... 23
AF0500 Upstream Circuit Breaker Trip On Local
Circuit Breaker Fail ................................................................................................................ 24
PGA-1100 Configuration ....................................................................................................... 25
Main-Tie-Main Using PGA-1100 ............................................................................................ 25
AF0500 TRIP/TRIPPED Connected to Two AF0500 Units (Three Zone Units) .................... 26
AF0500 Outline And Mounting Details .................................................................................. 29
Fail Safe Error Indication using Multiple AF0500’s ................................................................ 31
LIST OF TABLES
1
2
Circuit Breaker Operating Time ............................................................................................. 27
Sample Table for Testing a System....................................................................................... 50
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
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AF0500 Arc-Flash Relay
1
Rev. 0-D-040816
KEY FEATURES
The AF0500 Arc-Flash Relay is a high-speed, arc-detection device for electrical power-distribution
systems. The AF0500 has outputs for two trip coils in two zones, and has inputs for up to four optical
sensors for optimal arc detection. The inputs support both point sensors and fiber-optic line sensors,
which cover a larger area.
Using optical sensors rather than relying strictly on current measurement allows a much faster
detection time than overcurrent relays or a circuit breaker alone can typically provide, as the light
from the arc is unique for the fault, whereas current pulses above the nominal level are part of normal
operation for many systems.
On the occurrence of an arc fault, the AF0500 detects the fault and pulses the trip contact in less
than one millisecond, which trips the circuit breaker(s) supplying the fault. The total arcing time is
effectively reduced to the mechanical opening time of the circuit breaker, typically between 30 and
75 milliseconds. This reduces the energy of the arc fault significantly, increasing worker safety,
reducing fault damage, and improving uptime. Switchgear can often be simply cleaned, inspected,
and put back in service after an arc fault instead of having to be replaced.
The trip contacts are solid-state switches (IGBT’s), and provide fast reaction and sufficient drive
capability for connection directly to circuit-breaker trip coils.
The AF0500 can be used on ac or dc electrical systems and can be powered from either an ac or
dc supply, or both.
1.1 Easy Installation
The AF0500 design philosophy is to configure one or more zone units to provide arc-flash protection.
Each zone unit provides two sensors, one trip coil output, and digital inputs and outputs which make
it possible to combine the zone units into larger zones, or to trip an upstream circuit breaker if a local
circuit breaker has failed to trip. Each AF0500 provides two zone units, which can be combined
freely, with no differences if the zone units are on the same AF0500 or on different physical units.
See Fig. 1. The complete configuration and “programming” of the system can be done by simply
wiring the inputs and outputs marked with green arrows – no external software is needed.
To facilitate this, the zone units are equipped with digital inputs and outputs, which allow a system
with multiple zones and upstream circuit breakers to be wired with no programming required. This
means that in many applications, the switchboard wiring diagram can completely describe how the
arc-flash system works.
The relay will automatically learn which sensors, power supplies and trip coils are connected, and
will indicate an alarm if a previously connected wire breaks or is unplugged. If a configuration change
is needed, the redetection process can be triggered by pressing the Reset button for three seconds.
All changes to the configuration are logged in a non-volatile text log, and if needed, the installation
memory can be locked and password-protected using the USB configuration software.
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14
15
16
18
17
19
TRIP COIL 1
20
21
22
23
24
TRIPPED
13
COM
12
TRIP
TRIPPED
11
C/B ON
ERROR
10
Rev. 0-D-040816
INHIBIT
SUPPLY 1
9
TRIPPED
8
COM
7
TRIP
6
C/B ON
5
4
INHIBIT
3
C/B FAIL
2
L1/+
100 - 240VAC/VDC
COM
1
N/L2/–
RESET
AF0500 Arc-Flash Relay
25
26
27
TRIP COIL 2
ARC-FLASH RELAY
AF0500
ZONE 1
USB
28
+
29
SENSOR 1
ETHERNET
SUPPLY 2
24 - 48VDC
PORT 1
ZONE 2
SENSOR 2
SENSOR 3
SENSOR 4
PORT 2
–
30
5V
31
TX
32
RX
33
0V
34
5V
35
TX
36
RX
37
0V
38
5V
39
TX
40
RX
41
0V
42
5V
43
TX
44
RX
45
0V
46
FIGURE 1. AF0500 Default Trip Zones.
1.2 Fail-Safe Operation
The AF0500 continuously monitors its internal circuitry as well as the connected optical sensors.
Any system faults, including a sensor-cable fault, are indicated by an Error relay and the Error LED
on the front panel. System faults are also logged locally and are available using MODBUS TCP.
A redundant trip circuit ensures that the AF0500 will trip the circuit breaker on an arc flash even if a
primary trip-circuit component fails. The design of the redundant trip circuit also provides a
significantly faster response to an arc on power-up (for example, after maintenance during a
shutdown) than is possible with microprocessor-only relays, which is an advantage in smaller selfpowered systems.
1.3 Fast Error and Fault Location
The optical sensors used with the AF0500 have built-in LED’s for indication of health and for easy
location of arc faults. The AF0500 also has one LED per optical sensor on the front panel to indicate
which sensor(s) have caused a trip and for indicating problems in the installation.
1.4 Ethernet Communication
The AF0500 can be supervised via MODBUS TCP. This provides status information for sensors,
analog inputs, digital inputs, digital outputs, and numerous event and error flags for an external
SCADA system.
1.5 USB Interface
A USB interface on the front panel of the AF0500 provides easy PC access to configuration settings
and access to an event log which provides detailed diagnostic information about measurements
before and after a trip. No PC driver or software installation is required.
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AF0500 Arc-Flash Relay
2
Rev. 0-D-040816
ARC-FLASH PROTECTION SYSTEM DESIGN
In order to find the necessary components and configuration for protecting a system, a single line
diagram and knowledge of the physical configuration of the system is needed.
1. Start by identifying the number and type of sensors that are needed to have coverage of the
complete system. In order to have complete coverage, all bus bar sections, circuit breaker
connection points, and bolted connections must have a sensor nearby. Typically, a single point
sensor per enclosed switchgear compartment is sufficient, but if a large internal component is
blocking the line-of-sight, an additional sensor may be necessary. A fiber sensor can be
threaded along a bus bar to protect many compartments, but only if they are interrupted by the
same circuit breaker. The fiber sensor can also be used to improve coverage of compartments
with many bulky components.
2. Identify which circuit breakers to open in order to completely interrupt all current to each
sensor. If more sensors are isolated by the same set of circuit breakers, these are said to be
in the same zone – an arc-flash event on any of these sensors will open the same set of circuit
breakers.
3. Identify if the system needs coordinated tripping – if upstream circuit breakers, which trips the
incoming feeder for several downstream circuit breakers, are present in the system, a decision
must be made to either merge all the smaller zones and trip all circuit breakers at once (fast
and cheap, but may trip more outgoing feeders than necessary), or to only trip the upstream
circuit breaker if the downstream circuit breaker fails to interrupt the current (slower and
costlier, but trips only what is necessary).
4. Based on the number of sensors and zones, the necessary number of outputs and sensors
can be found. Each AF0500 provides two zones (two circuit breaker outputs) and two sensor
inputs per zone, which can be bundled into larger zones by a single wire, and which can
combine fiber and point sensors completely as needed. See Fig. 1.
5. Now, place one AF0500 trip output for each circuit breaker in the system. If there are more
than two sensors per zone, connect the AF0500 zones together by connecting the “TRIP” and
“TRIPPED” terminals on all zones. Zones can also be made larger by using a sensor covering
a larger area, i.e. by changing point sensors to fiber sensors. Place the sensors in the cabinets,
and connect them to the zone inputs. The sensor cables, which use copper wire, can be
shortened or extended as needed.
NOTE: If upstream circuit breakers must be controlled, all downstream circuit breakers must be
equipped with feedback switches in order to detect if they tripped. This feedback contact must be
connected to the “C/B ON” input for the corresponding output. By default, the AF0500 expects a NO
contact to COM such that a tripped circuit breaker connects the input to COM, but this can be
configured. A failure to open a circuit breaker within the normally expected opening time will activate
the “C/B FAIL” output, which must then be connected to a “TRIP” input on the upstream zone.
Remember that if the system contains more circuit breakers which may fail, all C/B FAIL outputs
must be connected to the upstream zone TRIP input.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
A B C
TRIP
R
PROTECTION
ACTIVE
G
RESET
14
15
16
17
18
19
TRIP COIL 1
20
21
22
23
24
TRIPPED
13
COM
12
TRIP
TRIPPED
11
C/B ON
ERROR
10
INHIBIT
SUPPLY 1
9
TRIPPED
8
COM
7
TRIP
6
C/B ON
5
4
INHIBIT
3
C/B FAIL
2
L1/+
100 - 240VAC/VDC
RESET
1
N/L2/–
COM
TRIP
COIL
25
26
27
TRIP COIL 2
ARC-FLASH RELAY
AF0500
NOTE 3
USB
ETHERNET
SENSOR 1
SENSOR 2
SENSOR 3
SENSOR 4
PORT 2
0V
38
NOTE 2
PGA-LS10
POINT SENSOR
5V
39
TX
40
RX
41
0V
42
5V
43
TX
44
RX
45
0V
46
WHITE
RX
37
SHIELD / BLACK
TX
36
RED
5V
35
YELLOW
0V
34
SHIELD / BLACK
RX
33
RED
TX
32
WHITE
5V
31
SHIELD / BLACK
PORT 1
YELLOW
–
30
RED
28
+
29
WHITE
SUPPLY 2
24 - 48VDC
PGA-LS20 / PGA-LS30
FIBER OPTIC SENSOR
NOTES:
1. RELAY OUTPUTS SHOWN DE-ENERGIZED.
2. A TOTAL OF FOUR POINT OR FIBER-OPTIC SENSORS CAN BE CONNECTED.
3. USB ‘B’ CONNECTOR. FOR CONFIGURATION, SEE SECTION 7.3.
4. ALL 0V TERMINALS ARE INTERNALLY CONNECTED TO EACH OTHER, BUT ARE NOT
CONNECTED TO CHASSIS GROUND (TERMINALS 3 OR 28). FOR APPLICATIONS THAT REQUIRE
A GROUNDED SENSOR CABLE SHIELD, CONNECT TERMINAL 30 TO GROUND.
FIGURE 2. AF0500 Typical Wiring Diagram.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
A B C
+24 VDC
TRIP
0V
R
PROTECTION
ACTIVE
G
RESET
12
13
14
15
16
17
18
19
TRIP COIL 1
20
21
22
23
24
TRIPPED
11
COM
10
TRIP
9
C/B ON
8
INHIBIT
7
TRIPPED
TRIPPED
6
COM
ERROR
TRIP
5
4
C/B ON
3
INHIBIT
SUPPLY 1
C/B FAIL
2
L1/+
100 - 240VAC/VDC
RESET
1
N/L2/–
COM
TRIP
COIL
25
26
27
TRIP COIL 2
ARC-FLASH RELAY
AF0500
NOTE 3
USB
SENSOR 1
ETHERNET
RX
37
SENSOR 3
0V
38
NOTE 2
PGA-LS10
POINT SENSOR
5V
39
TX
40
RX
41
SENSOR 4
0V
42
5V
43
TX
44
RX
45
0V
46
WHITE
TX
36
SHIELD / BLACK
5V
35
RED
0V
34
YELLOW
RX
33
SHIELD / BLACK
0V
TX
32
RED
5V
31
WHITE
+24 VDC
SENSOR 2
PORT 2
SHIELD / BLACK
PORT 1
YELLOW
–
30
RED
28
+
29
WHITE
SUPPLY 2
24 - 48VDC
PGA-LS20 / PGA-LS30
FIBER OPTIC SENSOR
NOTES:
1. RELAY OUTPUTS SHOWN DE-ENERGIZED.
2. A TOTAL OF FOUR POINT OR FIBER-OPTIC SENSORS CAN BE CONNECTED.
3. USB ‘B’ CONNECTOR. FOR CONFIGURATION, SEE SECTION 7.3.
4. ALL 0V TERMINALS ARE INTERNALLY CONNECTED TO EACH OTHER, BUT ARE NOT
CONNECTED TO CHASSIS GROUND (TERMINALS 3 OR 28). FOR APPLICATIONS THAT REQUIRE
A GROUNDED SENSOR CABLE SHIELD, CONNECT TERMINAL 30 TO GROUND. AN ISOLATED
D.C. SUPPLY IS STRONGLY RECOMMENDED.
FIGURE 3. AF0500 24-Vdc Source Typical Wiring Diagram.
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AF0500 Arc-Flash Relay
3
Rev. 0-D-040816
SENSOR PLACEMENT
3.1 General Guidelines
Optical sensors should have line-of-sight to points being monitored. Ensure that the point sensors
and fiber are not blocked by fixed or moveable objects. Areas that will be accessed for maintenance
or with moveable parts (such as draw-out circuit breakers) should be considered a high priority for
installation. Do not place sensors or cables on bare components that will be energized and avoid
sharp bends in the cable, particularly when using the PGA-LS20 and PGA-LS30 fiber-optic sensors.
The electrical cables and sensors should be considered to be at ground potential when determining
electrical clearances.
Sensors should be mounted in a location that will minimize the chance of debris or dust build-up and
with easy access for maintenance if needed. A point sensor mounted at the top of an enclosure and
facing down is optimal for reducing dust build-up. It should be noted that most enclosures are metallic
and the reflectivity combined with the high intensity of an arc mean that even a moderately dusty
sensor will collect adequate light.
In dusty environments, sensor cleaning should be part of a regular maintenance schedule and can
be performed using compressed air or a dry cloth.
3.2 Switchgear Protection
12
13
14
15
16
17
18
19
TRIP COIL 1
20
21
22
23
24
COM
11
TRIP
10
C/B ON
9
TRIPPED
8
INHIBIT
7
TRIPPED
COM
6
TRIP
ERROR
C/B ON
5
4
TRIPPED
3
INHIBIT
SUPPLY 1
C/B FAIL
2
L1/+
100 - 240VAC/VDC
COM
1
N/L2/–
RESET
The sensors used for arc-flash detection are optical sensors. Line-of-sight between the points where
an arc could occur and the sensor is optimal, but the reflectivity of metallic compartments will help
in distributing the light from an arc fault in the entire cabinet.
25
26
27
TRIP COIL 2
ARC-FLASH RELAY
5V
31
TX
32
RX
33
0V
34
5V
35
TX
36
RX
37
SENSOR 3
0V
38
5V
39
TX
40
RX
41
SENSOR 4
0V
42
5V
43
TX
44
RX
45
0V
46
IN
CO
M
IN
G
PGA-LS10
SENSOR 2
PORT 2
POINT SENSOR
SENSOR 1
ETHERNET
PORT 1
–
30
DE
VI
N CE
SH OT S
OW
N
PGA-LS10
+
29
POINT SENSOR
SUPPLY 2
24 - 48VDC
PGA-LS10
USB
28
DE
VI
N CE
SH OT S
OW
N
MA
EA IN
KE
R
BR
POINT SENSOR
IP
TR
AF0500
DE
VI
N CE
SH OT S
OW
N
FIB
ER
S
PG
A- ENS
LS
OR
20
SENSOR 4
SENSOR 3
SENSOR 2
SENSOR 1
Often one point sensor is sufficient to monitor a complete switchgear compartment. However, if there
are large components such as circuit breakers that cast shadows over wider areas, more than one
point sensor is required.
3.3 Transformer Protection
The AF0500 can also be used for the protection of transformers. Two or more point sensors should
be used per transformer to monitor the primary and secondary connection terminals. For the
placement of the sensors, the same considerations apply as for switchgear protection.
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AF0500 Arc-Flash Relay
4
Rev. 0-D-040816
OPTICAL SENSORS
The AF0500 has four inputs for optical arc-fault sensors.
Two sensor types are supported:

PGA-LS10 Photoelectric Point Sensors with sensor check

PGA-LS20 and PGA-LS30 Fiber-Optic Sensors with sensor check
The sensors can be used together, in any combination.
Both sensor types have LED indication of sensor health and fault location. A sensor-check circuit
tests the sensor to verify that the sensor assembly is functioning correctly. A healthy sensor will
flash its internal red LED every few seconds. A sensor that has detected an arc will indicate solid
red until the trip is reset.
The sensors connect to the AF0500 with shielded three-wire 20 AWG (0.5 mm2) electrical cable.
Each sensor includes 10 m (33 ft) of cable which can be shortened or extended up to 50 m
(164 ft). These cables should be considered to be at ground potential when determining electrical
clearances in the cabinet.
Any connected optical sensor with circuit check will be automatically detected and cause the
AF0500 to report an error if it is subsequently disconnected.
NOTE: Inserting and removing a sensor cable can cause a trip, depending on which terminals make
contact first. To guard against nuisance tripping, remove the trip coil terminal blocks before
connecting and disconnecting sensors, or perform the maintenance while the system is
de-energized.
PGA-LS10
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PGA-LS20 / PGA-LS30
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
4.1 PGA-LS10 Photoelectric Point Sensor with Sensor Check
This sensor has a detection area of a 2-m (7-ft) half-sphere for arcs of 3 kA or more.
A built-in LED enables the AF0500 to verify the function of the light sensor, wiring, and electronics.
If the sensor does not detect the sensor-check LED, a sensor-fail alarm will occur – the ERROR
relay will change state and the sensor indication LED will begin to flash. See Section 7.
The sensor includes 10 m (33 ft) of shielded three-wire electrical cable which can easily be shortened
or extended to a maximum of 50 m (164 ft). Use Belden 85240 or equivalent cable (wire colors may
vary).
2.5 m (8.2 ft)
3 kA
2 m (6.6 ft)
2 m (6.6 ft)
PGA-LS10
2 m (6.6 ft)
2 m (6.6 ft)
FIGURE 4. PGA-LS10 Detection Range for a 3 kA Fault.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
4.1.1 PGA-LS10 Connection
9.6
(0.38)
8.3
(0.33)
14.2
(0.56)
2.4
(0.09)
23.8
SHIELD / BLACK
YELLOW
RED
Ø4.25(0.167)
MOUNTING HOLES
WHITE
SHIELD / BLACK
YELLOW
RED
10 m
(32.8 ft)
WHITE
(0.94)
NOTE 2
52.0
(2.05)
44.0
(1.73)
Ø8.3(0.33)
SENSOR LENS
4.0
(0.16)
RED LED FOR
CIRCUIT CHECK AND
VISUAL DIAGNOSTICS
24.0
(0.94)
32.0
(1.26)
NOTES
1. DIMENSIONS IN MILLIMETERS (INCHES) UNLESS OTHERWISE STATED.
2. UP TO 4 PGA-LS10 PHOTOELECTRIC POINT SENSORS WITH BUILT-IN
CIRCUIT CHECK CAN BE CONNECTED.
3. THE PGA-LS10 SENSOR SHIPS ASSEMBLED WITH A PLUG-IN CONNECTOR.
IT MAY BE NECESSARY TO DISCONNECT THE PLUG-IN CONNECTOR
DURING INSTALLATION.
TERMINAL
FUNCTION
COLOR
5V
SUPPLY
RED
TX
CIRCUIT CHECK TRANSMIT
WHITE
RX
RECEIVE
YELLOW
0V
SHIELD
BLACK/COPPER
FIGURE 5. PGA-LS10 Connection Diagram.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
4.1.2 PGA-LS10 Installation
The PGA-LS10 point sensor includes an adhesive-backed drill template for easy surface or panelmount installation.
PANEL
SURFACE
NOTE 3
PANEL
Ø9(0.354)
PGA-LS10
DRILL TEMPLATE
SURFACE
PANEL
SURFACE
Ø9(0.354)
DRILL TEMPLATE
SURFACE-MOUNTED
PGA-LS10
PANEL-MOUNTED
PGA-LS10
NOTES AND INSTALLATION:
1. ALL DIMENSIONS IN MILLIMETERS (INCHES).
2. AFFIX THE DRILL TEMPLATE WHERE THE SENSOR IS TO BE
MOUNTED.
3. MOUNTING SCREWS ARE M4 OR 8-32.
4. THE PGA-LS10 CAN BE SURFACE OR PANEL MOUNTED. SELECT
THE APPROPRIATE HOLES AND DRILL THROUGH THE TEMPLATE.
FIGURE 6. PGA-LS10 Mounting Detail.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
4.2 PGA-LS20 and PGA-LS30 Fiber-Optic Sensors with Sensor Check
The PGA-LS20 and PGA-LS30 sensors have a 360° detection zone along the fiber’s length. A builtin LED enables the AF0500 to verify the function of the light sensor, wiring, and electronics. If the
sensor does not detect the sensor-check LED, a sensor-fail alarm will occur. The ERROR output will
change state, and both the LED on the front panel and the indicator LED in the sensor itself will
begin to flash red. See Section 7.
The PGA-LS20 and PGA-LS30 sensors have three components:
1. A fiber-optic cable, with one end covered with a black sleeve.
 PGA-LS20 has 8 m (26 ft) of active fiber and 2 m (7 ft) of covered fiber.
 PGA-LS30 has 18 m (59 ft) of active fiber and 2 m (7 ft) of covered fiber.
2. A transmitter with a white enclosure and a white thumb nut.
3. A receiver with a white enclosure, a black thumb nut, and an adjustment screw behind an
access hole.
Both the receiver and the transmitter connect to one AF0500 input using shielded three-wire
electrical cable. All three components are monitored to ensure correct operation.
4.2.1 Fiber Connection
The fiber is the light-collecting element of the PGA-LS20 and PGA-LS30. It must be installed so it
has line-of-sight to all current-carrying parts. In some cases this may be accomplished by following
the bus bars along the back wall of the cabinets.
Drill holes using the included drill template and fasten the transmitter and receiver to the cabinet
walls using rivets or screws. Connect the attached cables to the AF0500. The wires of the
transmitter and receiver must be connected as shown in Fig. 7.
Connect the black-sleeve-covered end to the receiver using the black thumb nut, and the white
uncovered end to the transmitter using the white thumb nut. Ensure the fiber is inserted completely
into the transmitter and receiver and the nuts are tightened. Pull gently on the cable to verify a
secure connection. The maximum pull strength of the fiber is 30 N (6.7 lbf).
The fiber should not be sharply bent or pinched. The minimum bending radius is 5 cm (2 in). Ensure
that any drilled holes are free of any sharp edges or burrs. Use grommets for further protection.
NOTE: Removing the fiber from the transmitter can cause a trip if the fiber end is pointed towards a
light source, since the fiber conducts light. This can also happen if the receiver is pointing directly
towards a light source without a fiber connected. To guard against nuisance tripping, remove the trip
coil terminal blocks before connecting and disconnecting sensors and fibers, or perform the
maintenance while the system is de-energized.
4.2.2 Receiver Wiring Connections
Connect the red wire to 5V.
Connect the yellow wire to RX.
Connect the white wire and the shield to 0V.
4.2.3 Transmitter Wiring Connections
Connect the red wire to 5V.
Connect the white wire to TX.
Connect the shield to 0V.
The yellow wire is not used.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
4.2.4 PGA-LS20 and PGA-LS30 Connection
The sensor is shipped with the wires mounted in a terminal block. See Fig 7.
The transmitter and receiver include 10 m (33 ft) of shielded three-wire electrical cable which can be
shortened or extended up to 50 m (164 ft). Transmitter and receiver cables can be different lengths
and must be independently shielded. Use Belden 85240 or equivalent cable (wire colors may vary).
Failure to independently shield transmitter and receiver cables can lead to an incorrect circuit check
– a faulty sensor could be falsely detected as continuous. However, if there is no sensor fault, arcflash detection will function normally in this condition.
SHIELD / BLACK
WHITE
RED
YELLOW
SHIELD / BLACK
RED
WHITE
46.0
(1.81)
2.0
(0.08)
18.8
(0.74)
24.0
(0.94)
4.0
(0.16)
Ø4.25(0.167)
MOUNTING HOLES
BLACK SLEEVE
(PGA-LS20: 2 m, 6.5 ft)
(PGA-LS30: 2 m, 6.5 ft)
RECEIVER
SENSITIVITY
ADJUSTMENT
SCREW
42.0
(1.65)
FIBER
(PGA-LS20: 8 m, 26.2 ft)
(PGA-LS30: 18 m, 59 ft)
46.0
(1.81)
4.0
(0.16)
DECREASE
SENSITIVITY
NOTES
1. DIMENSIONS IN MILLIMETERS (INCHES) UNLESS OTHERWISE
STATED.
THUMB NUT
32.0
(1.26)
2. UP TO 4 PGA-LS20 / PGA-LS30 FIBER-OPTIC SENSORS
WITH BUILT-IN CIRCUIT CHECK CAN BE CONNECTED.
3. THE PGA-LS20 AND PGA-LS30 SENSORS SHIP
ASSEMBLED WITH A PLUG-IN CONNECTOR. IT MAY BE NECESSARY
TO DISCONNECT THE PLUG-IN CONNECTOR DURING INSTALLATION.
TERMINAL
FUNCTION
COLOR
5V
SUPPLY (TRANSMITTER AND
RECEIVER)
RED
TX
SENSOR CHECK (TRANSMITTER)
WHITE
RX
SIGNAL (RECEIVER)
YELLOW
0V
SENSOR CHECK (RECEIVER) AND
BOTH SHIELDS
BLACK/COPPER
FIGURE 7. PGA-LS20 and PGA-LS30 Connection Diagram.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
4.2.5 Fiber-Optic Sensor Adjustment
The sensor is calibrated at the factory for 60 cm (24 in) of fiber in each monitored compartment.
When using a fiber-optic sensor in compartments with less than 60 cm (24 in) of fiber, the sensitivity
may have to be adjusted. The sensor is unable to differentiate between 10,000 lux on 60 cm (24 in)
of fiber and 30,000 lux on 20 cm (8 in) of fiber – the same amount of light is transmitted through the
fiber to the receiver. To achieve the desired sensitivity, the receiver (with the black thumb nut) must
be adjusted.
4.2.6 Sensor Adjustment For a Fiber Length Other Than 60 cm (24 in)
To adjust the fiber length, a powerful light source of at least 100 lumen (e.g. 500 W halogen lamp)
and a spare point sensor is required. Use the following procedure to calibrate the sensor:
1. Remove the trip coil connector to avoid tripping the circuit breaker while testing.
2. Use a point sensor to find the distance to the lamp at which the sensor just trips. Note the
distance between the lamp and the point sensor (typically 15-40 cm (5.9-15.7 in), depending
on the lamp).
3. Adjust the receiver (black thumb nut) sensitivity level to the minimum by turning the small
metal screw clockwise until it begins to click. This may be too low to detect the sensor-check
signal and may cause the related LED on the relay to flash red to signal the error. This has
no implication for the rest of the procedure, since the trip signal is transmitted anyway.
4. Place the lamp facing the fiber in the compartment closest to the transmitter end (white thumb
nut) of the fiber. This allows for loss along the full length of the fiber. The distance between
the lamp and the fiber should be the same as the distance observed in step 2.
5. Slowly turn the metal screw on the receiver counter-clockwise until the AF0500 sensorindicator LED for that sensor changes to red, indicating a trip.
6. Press reset on the relay, and check that the sensor indicator LED turns green, indicating that
the sensor-check signal is detected, and that the fiber is thus protected by circuit check.
If the system compartment is very small, it may not be possible to adjust the fiber to provide sufficient
sensitivity. Contact Littelfuse for support.
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19/70
AF0500 Arc-Flash Relay
5
Rev. 0-D-040816
APPLICATION EXAMPLES
5.1 Basic scenario: One Sensor – One Circuit Breaker
No configuration necessary.
+24
Incoming
Circuit
Breaker
Sensor
Trip
Coil 2
Sensor
3 or 4
AF0500
FIGURE 8. Basic AF0500 Configuration.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
5.2 Two Independent Trip Zones
No configuration necessary.
+24
+24
Incoming
Incoming
Circuit
Breaker
Circuit
Breaker
Sensor
Sensor
Trip
Trip
Coil 1
Coil 2
Sensor
Sensor
1 or 2 AF0500 3 or 4
FIGURE 9. AF0500 with Two Independent Trip Zones.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
5.3 Two Zones Combined To One By Cabling
No configuration necessary.
+24
Incoming
Circuit
Breaker
Sensor
Sensor
Note 1
Sensor
Trip
15
21
Coil 2
TRIPPED TRIP
AF0500
Sensor Sensor
Sensor
1
3
2
FIGURE 10. AF0500 with Two Trip Zones Combined.
The wire marked “Note 1” in Fig. 10 connects the TRIPPED output from one zone unit to the TRIP
input on another. This means that the first zone will trip the other, so that either sensor 1, 2 or 3 will
trip the TRIP COIL 2 output.
This could also be achieved through configuration, by assigning all sensors in the Zone 2 Settings
to trip TRIP COIL 2.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
5.4 Several Zones Combined To One By Cabling
+24
Incoming
Circuit
Breaker
Note 1
Sensor
1 2
Sensor
AF0500
Sensor
Trip
Coil 2
21
15
TRIPPED TRIP
15
23
TRIPPED TRIPPED
Sensor
Sensor
3 4
Sensor
1 2
Sensor
Sensor
AF0500
Sensor
Sensor
Sensor
3 4
Sensor
FIGURE 11. AF0500 with Several Trip Zones Combined.
The wire marked “Note 1” in Fig.11 connects all TRIPPED outputs to the TRIP input on the rightmost zone. This means that any of the 8 sensors connected will trip the right-most TRIP COIL 2
output.
NOTE: Several TRIP COIL outputs can be tripped from this common zone by connecting the
common wire to their TRIP inputs (terminal 13 or 21).
NOTE: If several AC-powered units are connected together, ensure that a COM terminal from each
unit are also connected together.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
5.5 Upstream Circuit Breaker Trip on Local Circuit Breaker Fail
No configuration necessary
+24
Incoming
Circuit
Breaker
Upstream
Circuit
Breaker
+24
C/B
Feedback
Circuit
Breaker
Local
Circuit
Breaker
Sensor
10
C/B
Fail
18
13 Trip
TRIP
Coil 1
AF0500
22 26
C/B Trip
ON Coil 2
Sensor
3 or 4
FIGURE 12. AF0500 Upstream Circuit Breaker Trip on Local Circuit Breaker Fail.
NOTE: This could also be achieved through configuration, by assigning ZONE 1 to trip on CB
FAILURE.
An available auxiliary contact in a circuit breaker must be used to provide feedback of the main
contact positions in order to detect that the local circuit breaker did not interrupt the current.
NOTE: The default configuration for C/B ON is a normally-closed signal, but this can be changed
in the Configuration Software via USB.
5.6 Main-Tie-Main using PGA-1100 Diode Logic Unit
When several AF0500 protected zones are used and a common upstream circuit breaker should be
tripped if any of the downstream zones experience a local clearing failure, the upstream circuit
breaker may run out of inputs. The PGA-1100 Diode Logic Unit makes it possible to combine several
trip outputs to the common circuit breaker, both for ground-return and powered circuit breakers.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
The PGA-1100 contains six power diodes connected as shown in Fig. 13. Terminals 4 and 8 are
common, and are always connected to the coil on the circuit breaker. If the positive supply is
connected to the coil, and the contacts on AF0500 are ground returned, terminals 5, 6 and 7 are
used for connecting up to three different trip sources to the breaker. If the coil has a fixed ground
return, and the contacts on AF0500 are switching the positive supply, use terminals 1, 2 and 3
instead.
1
2
3
4
8
5
6
7
FIGURE 13. PGA-1100 Configuration.
+24
Incoming
Incoming
Circuit
Breaker
+24
Circuit
Breaker
PGA-1100
PGA-1100
Manual Trip
Manual Trip
Tie Circuit
Breaker
Busbar to Other Zones
Circuit
Breaker
+24
Trip
4
PGA-1100
5
Trip
Coil 2
Trip
7
Trip
Coil 2
6
AF0500
AF0500
Sensor 3
Sensor 3
Manual Trip
Sensor
Sensor
FIGURE 14. Main-Tie-Main Using PGA-1100.
Fig. 14 shows two incoming feeders and a tie circuit breaker. Each incoming circuit breaker trip coil
is connected to an independent AF0500 through a PGA-1100 Diode Logic Unit. The tie circuit
breaker trip coil is also connected to the trip coil of each AF0500 through a separate PGA-1100.
If a trip occurs at either AF0500, both the tie circuit breaker and the corresponding circuit breaker
will trip.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
5.7 Main-Tie-Main from a Dedicated AF0500 Zone
If the zones on each side are small, it is possible to implement the tie circuit breaker trip directly by
wiring.
+24
+24
Incoming
Incoming
Circuit
Breaker
Circuit
Breaker
Sensor
Sensor
Sensor
Sensor
Sensor
Busbar to Other Zones
Circuit
Breaker
+24
Tie Circuit
Breaker
Note 2
Note 1
Trip
13
15
TRIP TRIPPED Coil 1
Sensor
1 2
Trip
21
23
TRIP TRIPPED Coil 2
AF0500
Sensor
3
Trip
Coil 1
13
15
TRIP TRIPPED
AF0500
Sensor
1 2
FIGURE 15. AF0500 TRIP/TRIPPED Connected to Two AF0500 Units (Three Zone Units).
The wire marked “Note 1” in Fig. 15 allows each side of the switch gear to trip the tie circuit breaker.
The (optional) wire marked “Note 2” disconnects both incoming feeders in case of an arc flash in the
tie circuit breaker itself. It is necessary to have two separate wires for these functions
NOTE: If the zones on each side are larger and made from several discrete zone units, connect only
the wire marked “Note 1”, since the two sides can otherwise trip each other through the shared wire,
or use the scheme with diode logic units detailed in Section 5.6.
5.8 Total Clearing Time
The AF0500 is capable of tripping a circuit breaker in less than 1 ms from when light hits the sensor.
This is not the same as the clearing time for the fault. The arc fault will continue until the current to
the fault has stopped flowing, which happens when the circuit breaker connected to the unit has
reacted.
5.8.1 Arc-Detection Delay
The AF0500’s default arc-flash detection intentional delay time is 1 ms, but can be configured
between 0.5 and 10 ms via the USB configuration software.
5.8.2 Circuit Breaker Operating Time
Circuit breakers have a predetermined operating time, dependent on the type of circuit breaker.
Older circuit breakers have clearing times up to eight cycles, while modern circuit breakers are able
to open in one to five cycles. Refer to the specifications of the installed circuit breaker.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
TABLE 1. CIRCUIT BREAKER OPERATING TIME.
CIRCUIT BREAKER OPERATING TIME
50 HZ
60 HZ
8 cycles
5 cycles
3 cycles
2 cycles
1½ cycles
1 cycle
160 ms
100 ms
60 ms
40 ms
30 ms
20 ms
133 ms
83 ms
50 ms
33 ms
25 ms
17 ms
The total clearing time is:
Total Clearing Time = Arc-Detection Delay + Local Circuit Breaker Operating Time
With the AF0500, the dominating time by far is the circuit breaker operating time.
5.8.3 Total Clearing Time Examples
Example: Total Clearing Time with a 3-cycle circuit breaker
A 3-cycle circuit breaker at 50 Hz tripping due to light on an AF0500 sensor will have a total clearing
time of:
1 + 60 = 61 ms
It is possible to reduce the total clearing time by installing special devices, which shunt the current
away from the arc fault. These can be found with clearing times down to 1-2 ms, reducing the total
clearing time down to less than 3 ms.
5.8.4 Total Clearing Time for Upstream Circuit Breakers In Case of a Circuit Breaker
Failure
The AF0500 detects the operation of the circuit breaker by detecting that an auxiliary contact,
mechanically connected to the main contact set, switches state. If this does not happen, the circuit
breaker is assumed to have failed. This takes the same time as the opening of the contact set.
Before the AF0500 can detect that the local circuit breaker failed to clear the fault, it needs to have
time to (fail to) operate. Thus, the total clearing time when the arc fault must be cleared from an
upstream circuit breaker is:
Total Clearing Time = Arc-Detection Delay + Local Circuit Circuit Breaker Nominal Operating Time
+ Output Delay + Upstream Circuit Breaker Operating Time
Here, two new terms must be included, the delay in communicating to the upstream zone, and the
operating time for the upstream circuit breaker. Again, the circuit breaker operating time dominates,
especially since we now need to add both circuit breaker operating times.
The reason for still including the local circuit breaker is that this time must be programmed into the
AF0500, so that it knows when to sample the CB ON input to see if the trip succeeded in clearing
the fault. Only after the local circuit breaker had time to react can the signal be sent to the upstream
circuit breaker.
Each interconnection wire between the AF0500 zones causes a small intentional delay of 0.5 ms. In
the following, this is rounded to 1 ms. If desired, this small delay can be avoided by programming
the zone to react to a CB FAIL signal in the USB configuration software. This, however, will only
work for a zone in the same unit, whereas the CB FAIL signal can be wired to other units in the
system. Generally, the delays in the AF0500 are inconsequential in relation to the circuit breaker
operating times.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
Finally, the upstream circuit breaker must obviously operate, which is added to the total clearing
time.
Example: Total Clearing Time with 3-cycle breakers and a local circuit breaker fault
Two 3-cycle circuit breakers at 50 Hz, with the upstream circuit breaker tripped by connecting the
CB FAIL output on one AF0500 to the TRIP input on another AF0500 zone:
1 + 60 + 1 + 60 ms = 122 ms
Example: Total Clearing Time with two-cycle circuit breakers and a local circuit breaker fault
Two 2-cycle circuit breakers, with the upstream circuit breaker tripped by a zone on the same
AF0500 unit, configured via the USB configuration software:
1 + 40 + 0 + 40 = 81 ms
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AF0500 Arc-Flash Relay
6
Rev. 0-D-040816
INSTALLATION AND TERMINALS
The AF0500 can be surface mounted using four 5-mm (10-32) screws, or it can be DIN-rail mounted
using the optional mounting brackets (PGA-0031).
Ensure there is enough clearance around the module to allow the plug-in terminals to be removed
and inserted.
Do not install modules which have been damaged in transport.
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MINIMUM CLEARANCE REQUIRED FOR CONNECTOR
INSERTION AND REMOVAL.
11
12
13
14
15
16
17
18
19
TRIP COIL 1
20
21
TRIP
10
22
23
24
C/B ON
9
TRIPPED
8
COM
7
TRIPPED
20.0
(0.79)
INHIBIT
6
TRIP
ERROR
C/B ON
5
4
INHIBIT
3
C/B FAIL
SUPPLY 1
COM
2
L1/+
100 - 240VAC/VDC
RESET
1
N/L2/–
TRIPPED
200.0
(7.88)
160.0
(6.30)
20.0
(0.79)
COM
54.3
(2.14)
38.8
(1.53)
25
26
4.0
(0.16)
TOP
27
TRIP COIL 2
122.2
(4.81)
130.2
(5.13)
ARC-FLASH RELAY
AF0500
USB
SIDE
20.0
20.0
(0.79)
SENSOR 2
SENSOR 3
SENSOR 4
PORT 2
5V
31
TX
32
RX
33
0V
34
5V
35
TX
36
FRONT
RX
37
0V
38
5V
39
TX
40
RX
41
0V
42
5V
43
TX
44
RX
45
0V
46
NOTE 2
6.0
(0.24)
10.0
(0.39)
130.0
(5.13)
5.0
(0.20)
(0.79)
SENSOR 1
ETHERNET
PORT 1
–
30
4 OPEN SLOTS
5.6 X 6.8 (0.22 x 0.27)
10.0
(0.39)
200.0
(7.88)
160.0
(6.30)
+
29
4.0
(0.16)
SUPPLY 2
24 - 48VDC
28
NOTE 2
MOUNTING DETAIL
BOTTOM
FIGURE 16. AF0500 Outline and Mounting Details.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
6.1 Power Supply
The AF0500 Arc-Flash Relay can be supplied by either a high voltage ac or dc supply, an auxiliary
low voltage supply, or both.
6.1.1 Line AC Supply
Connect an ac supply to terminals 1 and 2. The supply voltage must be 100 to 240 Vac.
6.1.2 Station Battery DC Supply
Connect a dc supply to terminals 1 and 2. The supply voltage must be 110 to 240 Vdc.
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
6.1.3 Auxiliary DC Supply
Connect a dc supply to terminals 29 and 30, ensuring correct polarity. The
supply voltage must be 24 to 48 Vdc.
6.1.4 Supply Surveillance
The AF0500 will automatically learn which supplies to expect, and will indicate
an alarm if one of the supplies is missing or out of nominal range. This is useful
to make sure that a failure in a redundant supply is detected.
The alarm will auto-reset when the supply is re-established or can be disabled
by holding the RESET button for three seconds, which will refresh which
supplies are connected to the AF0500. See Section 7.1 for more information
on the RESET button.
6.2 Common I/O Block
An LED provides visual indication of each output
status. The output contacts are shown on the front
panel in the de-energized state.
6.2.1 ERROR Signal Relay
The ERROR output signals the health of the arc-flash
relay and its connected sensors and trip coils.
The ERROR output consists of an insulated
electromechanical change-over contact (Form C /
SPDT) on terminals 4, 5, and 6. Terminals 4 and 5 are
connected when the relay is not powered or when an
error exists, signalling that the protection is not active.
When the relay is active and healthy, the relay is
energized and terminals 5 and 6 are connected.
If an error is currently active and an additional error occurs, the ERROR output will briefly energize,
then de-energize again. This is to communicate to connected equipment the error state has
changed, but there are outstanding errors.
If possible, an LED on the front panel will indicate where the error is by flashing. Otherwise, the
configuration software will show an overview of the current errors.
The ERROR relays of several units can be combined into one fail-safe signal by daisy-chaining
terminals 5 and 6. In that way, if just one of the linked units experiences an error, the connection
between the ends will be broken. Likewise, if the wire breaks, an alarm will be raised.
+24
Protection
Active
4 5 6
AF0500
4 5 6
AF0500
FIGURE 17. Fail Safe Error Indication using Multiple AF0500’s.
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6.2.2 TRIPPED Signal Relay
The TRIPPED output is used for signalling a trip condition to a remote monitoring system. It is not
rated for tripping circuit breakers.
The TRIPPED output consists of a normally-open insulated electromechanical relay contact (Form
A / SPST-NO) on terminals 7 and 8.
The TRIPPED output will energize if the AF0500 detects an arc fault, and will stay active until the
arc-fault event is reset by pressing the Reset button. In case of a new event occurring before the
first was reset, the output will deactivate and reactivate in order to generate a new alarm on
connected equipment.
The TRIPPED output of several units can be combined to one by connecting terminals 7 and 8 on
all units in parallel. This connection is not fault tolerant, and cannot detect a broken cable. It can be
protected using parallel resistors, if the receiving equipment supports it.
6.2.3 C/B FAIL Output
The C/B FAIL output is used to signal to an upstream circuit breaker that the local circuit breaker
failed to clear the fault. This is detected by requiring that the C/B ON signal is inactive within a certain
timeout after the trip signal is sent to the local circuit breaker via the TRIP output. If the C/B ON
signal is still active, the C/B FAIL output is pulsed.
Typically, the C/B FAIL output will be connected to the TRIP input of a zone unit at an upstream
circuit breaker, tripping this to interrupt the current feeding the arc fault.
6.2.4 RESET Input
The RESET input is used as a remote reset after an arc fault has been detected.
Activating this input will reset an alarm, clear the TRIPPED and TRIP COIL outputs, and clear the
indicators. The RESET input will not change the configuration of the relay, and errors cannot be
cleared using this input. For this functionality, see Section 7.1.
If the reset input is permanently connected to COM, the AF0500 will auto reset immediately after a
trip has occurred.
A new trip event will pulse the trip coil output regardless of its trip state.
6.3 Trip Zone I/O
Each trip zone has a block of I/O attached.
The AF0500 has three digital-input functions;
inhibit, trip and C/B feedback.
By default, the inputs are considered active
when connected to COM, except for the C/B
ON input, which is considered active (circuit
breaker conducting power) when the terminal
is open circuit.
The LED’s are solid ON when the
corresponding terminal is active, or if it has
been active in relation to a trip event, and OFF
otherwise.
The terminals with green arrows are meant for
fast communication between zone units. The
maximum delay of such a connection is less than 1 ms, which can be safely ignored in relation to
the total clearing time.
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AF0500 Arc-Flash Relay
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The connections marked with a green arrow are not equipped with circuit check. Littelfuse
recommends that the connections are kept within the same cabinet.
6.3.1 INHIBIT Input
The INHIBIT function suppresses the light sensors and TRIP input so that the circuit breaker is not
tripped. The purpose could be to connect an external current sensor module for inhibiting nuisance
trips.
If the INHIBIT input is activated, the AF0500 will indicate on the sensor LED that light above the
threshold is being detected, but will not pulse the TRIP COIL output, nor activate the TRIPPED
output. In the event log available via USB (see section 7.4), logged data will indicate a possible arc
fault was detected, but not tripped due to the inhibit function.
Inhibit blocks all sources of trip from activating the trip coil output, including the TRIP input and all
remote channels.
6.3.2 TRIP Input
The TRIP input is used to remotely trip the AF0500. Once activated, the AF0500 will pulse the TRIP
COIL output in less than 1 ms.
6.3.3 C/B ON Input
Feedback from a circuit breaker auxiliary contact is used with the C/B ON input to detect the circuit
breaker closure status. If a circuit breaker failure is detected, the C/B FAIL signal can be used to trip
an upstream circuit breaker.
The polarity of the input is programmable in the USB configuration software, but in order to be failsafe, the default configuration expects the circuit breaker to conduct power to the system when the
input is open circuit. This means that a broken wire will have the AF0500 assume that the circuit
breaker did not open, thus opening the upstream circuit breaker.
6.3.4 TRIPPED Output
The TRIPPED output is used to remotely trip another AF0500. It is pulsed briefly active when a trip
event occurs, and the zone TRIP output is energized. If this output is connected to the TRIP input
on another zone as shown in Fig. 7, zone 1 will trip zone 2 as well. If the reverse connection is made,
the two zones are merged into one – any trip event in one zone will also trip the other zone. This
makes it possible to e.g. extend the number of sensors tripping a single TRIP output.
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AF0500 Arc-Flash Relay
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6.4 TRIP COIL Output
0A
Use the TRIP COIL outputs to trip a shunt or
undervoltage circuit breaker. The operating mode is
programmable using the AF0500 configuration
software. See Section 7.3.
0B
The TRIP COIL output can be used for trip coils with
a 24 to 300 Vac/Vdc supply voltage. The output is
monitored to verify that there is voltage available to
the tripping circuit. If voltage is not detected, the
ERROR output will change state, and the TRIP COIL
LED will flash red to indicate an error.
0C
TRIP VOLTAGE
24-300 VAC / VDC
The TRIP COIL output is a pulsed output when in
shunt trip mode. When an arc flash is detected, the
TRIP COIL output is activated in less than one
millisecond. The TRIP COIL output is deactivated
after the adjustable pulse period delay. The output is
an IGBT which can be directly connected to trip coils
up to 200 VA. For detailed ratings, see Section 10.
The TRIP COIL output is galvanically isolated up to 1,000 Vac.
NOTE: The TRIP COIL output consists of a rectifier bridge and an IGBT. In combination, this creates
a very fast relay-like switch which is able to trip even large circuit breakers without the added delay
of a mechanical relay. There is a voltage drop of 2-4 V across the TRIP COIL output when energized.
NOTE: The TRIP COIL output functions as a momentary switch and is protected against thermal
overload. It will gradually lower the time the trip coil is active if the AF0500 is tripped repeatedly.
6.5 Sensors
Each zone in the AF0500 is by default associated with two light sensors
as shown in Fig. 1. In the USB configuration software, this assignment
can be changed if desired. It is also possible to connect the zones
together by wiring the TRIPPED output from one zone to the TRIP input
in the other zone. In this case, the first zone will only trip the second zone.
6.5.1 Zone Association
The zone association can be changed in the USB configuration software,
which allows any sensor to be associated with any output.
It is possible to associate e.g. sensor 4 with trip 1, and sensors 1-3 with
trip 2, but it can easily cause confusion. We recommend keeping the
standard configuration if it is at all possible in the application.
Zones can also be combined by wiring their TRIPPED outputs and TRIP
inputs together. This creates a larger zone with more sensors and
outputs, which will trip together. See application examples in Section 5.
For information on using the USB configuration software, see Section 7.3.
6.5.2 Light Immunity Adjustment
By default, the sensors will signal an arc-fault event if the light intensity is above approximately
10 klux. The light intensity from an arc fault is very high, typically in the area of 1 Mlux, and the choice
of 10 klux is mostly a compromise between being sufficiently above normal light levels (about 1 klux
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in a very well lit office environment) and the need to be able to test the system with a manageable
light source such as a flashlight.
The immunity level can be changed up to 30 klux via the USB configuration software. For
information on using the USB configuration software, see Section 7.3.
This may be required for applications with powerful work lights or regulation requirements for the
trip level.
The light sensors are not usable outdoors or in direct sunlight, as the intensity in direct sunlight will
saturate the sensors.
6.5.3 Extending or Shortening Cable Length
Both point and fiber sensors are delivered with 10 m (33 ft) of three-wire shielded cable. If the
installation requires it, these cables can be shortened or extended up to 50 m (164 ft). See
Sections 4.1 and 4.2.4.
Do not combine several sensor cables within the same shield. Do not combine the cables to
transmitter and receiver for the fiber sensors within the same shield.
6.6 Ethernet
The AF0500 is equipped with two 10/100 BaseTX Ethernet
ports. An internal Ethernet switch connects both ports
logically to each other and to the processor of the unit.
The Ethernet ports provide SCADA access to the unit status
and measurements via MODBUS/TCP on port 502.
See appendix A for memory map.
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USER INTERFACE
7.1 Reset Button
The RESET button on the front panel of the AF0500 has two functions: A
momentary press will reset any trip events, and holding the button for three
seconds will reset and refresh the configuration of the AF0500 with regard to
the sensors, trip coils, and power supplies currently present. Sensors, trip
coils and power supplies can be added at any time, but once a connection is
detected, its removal will cause an alarm.
Pressing the reset button will reset trip indications and error indications for
any existing error. The error indication will remain if the error is still present and cannot be reset, e.g.
if a sensor is missing or a supply voltage is outside the specification.
Holding the reset button for three seconds will reset the current list of connections to the unit. The
AF0500 will then redetect which sensors, trip coils, and power supplies are connected, which will
clear the alarms. Do not do this until the reason for the alarm is known, and has been rectified.
If password protection is enabled in the USB configuration, resetting the list of connections is not
allowed. In this case, use the USB configuration software to reset the alarm.
Holding the reset button for 10 seconds will reset the internal drives to factory defaults. This does
not affect the configuration or the log, but does imply a reset of the connected sensors as detailed
above.
7.2 LED Indications
Input LED’s follow the input state, and provide no information on the history. Since all digital outputs
are pulsed, the LED’s indicate if the output has been activated since the last reset. Blinking LED’s
on the front panel indicate errors e.g. an expected sensor is missing, etc. To reset the expected
state, use the RESET button.
SUPPLY 1 and 2 (Terminals 1 to 3 and 28 to 30, respectively)
On, green
Supply voltage is connected.
Flashing green
Supply voltage on this terminal has previously been detected, but is now
missing, or the connected supply is outside the specifications.
Off
Supply voltage is not connected.
ERROR Relay (Terminals 4 to 6)
On, red
An error has been detected, and the ERROR relay has been de-energized. If
another LED is flashing, use this to localize the error and correct the problem.
The event log or the USB configuration software can also be used to show the
cause for the alarm, see section 7.3.
Off
No errors detected.
The LED will not always follow the internal contacts. The ERROR relay will be in the state shown on
the front panel when power is not connected, and will energize if no errors are detected. The relay
will de-energize on errors, and if power is removed. The ERROR relay will furthermore give a one
second pulse if an additional error is detected while errors are already present. Use the event log,
available via USB, to get more information on the errors present. See Section 7.4.
TRIPPED Relay (Terminals 7 to 8)
On, red
A TRIP output is or has been active due to an arc-flash event. Press RESET
to clear the trip.
Off
No unacknowledged trips.
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AF0500 Arc-Flash Relay
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The LED will not always follow the status of the internal contacts. The TRIPPED relay is shown on
the front panel in its de-energized state, and will energize on a trip event, and de-energize on reset.
The TRIPPED relay will also pulse for one second if an additional trip happens before the previous
event was reset. Use the event log, available via USB, to get more information about the history of
the trip. See Section 7.4.
RESET Input (Terminal 9)
On, red
RESET input or another reset source (RESET button or MODBUS) is active.
Off
RESET input is inactive.
The reset button is blocked during trips. If the RESET input or the MODBUS reset register is
permanently activated, errors and trips will be reset as soon as they are cleared or completed.
C/B FAIL Output (Terminal 10)
On, red
A circuit breaker did not trip as expected. The C/B FAIL output is or has been
active. Press RESET to clear the trip.
Off
No C/B failure is detected.
INHIBIT input (Terminals 12 and 20)
On, red
INHIBIT input is active. The zone will not trip, even if a sensor or a trip input is
activated. The sensor LED’s will turn red on such a trip, and can be reset by
pressing the RESET button.
Off
INHIBIT input is inactive
TRIP Input (Terminals 13 and 21)
On, red
TRIP input is active.
Off
TRIP input is inactive
C/B ON Input (Terminals 14 and 22)
On, green
The connected circuit breaker is conducting power.
Off
The connected circuit breaker is not conducting power.
TRIPPED Output (Terminals 15 and 23)
On, red
The TRIPPED output is or has been active. Press RESET to clear the trip.
Off
The TRIPPED output is inactive.
TRIP COIL 1 and 2 (Terminals 18 to 19 and 26 to 27, respectively)
On, green
The TRIP output is ready and detects a valid trip voltage in Shunt mode, or is
configured as Undervoltage trip coil.
Flashing red
An error has been detected. The connection to the trip coil may be broken. If
this trip coil is not meant to be used, press and hold the RESET button for a
few seconds.
On, red
The TRIP output is or has been active. Press RESET to clear the trip.
Off
The TRIP output is not configured to trip, and no trip coil has been detected.
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AF0500 Arc-Flash Relay
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Sensors
On, green
The sensor input is active and has a functional sensor connected.
On, red
The sensor caused a trip event. If no TRIP COIL outputs are red, the trip may
have been inhibited; see the event log. The LED in the sensor will also be solid
red. Press the RESET button to clear the trip.
Flashing red
The circuit check of the sensor failed; check the wiring and that fiber sensors
are fully seated in the thumb screws. If possible, the LED in the sensor will
also be flashing red. If a sensor has been removed temporarily or on purpose,
press and hold the RESET button for a few seconds to redetect the state. If
adjustments have been made to the fiber sensitivity, see Section 7.1.
Off
The input has not detected a connected sensor. The input will by default still
be active.
PGA-LS10, PGA-LS20 and PGA-LS30
Flashing Red
The sensor is operating normally.
On, red
The sensor caused a trip event.
Off
The sensor is unplugged or faulty, or the AF0500 is without power (check the
wiring and that fiber sensors are fully seated in the thumb screws).
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AF0500 Arc-Flash Relay
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7.3 USB Configuration Software
To access the configuration software, plug in a USB connector and connect to a Windows1 computer.
After a few seconds, two new drives appear:
Open the Configuration drive, and double click on the file named ’config.hta’
The configuration software will now open.
Tabs show each logical section of the relay.
Hovering above each setting will display the valid limits for the setting.
Press the Save button and remove the USB connector to let the AF0500 read the new configuration.
NOTE:
1
All Microsoft Windows versions from and including Windows XP are supported. Some corporate
networks may disallow HTA applications, in which case you should contact your system
administrator to allow local HTAs to run.
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AF0500 Arc-Flash Relay
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It is not possible to view live data from the unit via USB. The values shown for e.g. IP address and
sensor state are the values at the moment the USB connector was plugged in. Setting the password
in the USB configuration software will prevent the list of connected devices from being reset via the
reset button on the front panel.
7.3.1 USB Configuration Software – Screen Examples
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The USB configuration software also shows the cause of any standing alarms in clear text.
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7.4 USB Event Log
To access the event log, plug in a USB connector and connect to a computer. After a few seconds,
two new drives appear:
The log is saved on the AF0500_LOG drive, and is a text file called AF0500.LOG.
A tool called log_view.hta allows simple filtering of the log, e.g. to show log lines with relation to
events only.
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AF0500 Arc-Flash Relay
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7.5 Firmware Upgrade
NOTE: The AF0500 will restart during the firmware upgrade process. Ensure the equipment is in a
safe state prior to starting the upgrade process. Do not interrupt the firmware upgrade process.
Product information, including hardware and firmware details, can be reviewed in the About tab as
shown in Section 7.3.1.
Follow the procedure below to perform a firmware upgrade:
1. Contact Littelfuse at [email protected] to obtain the newest firmware file.
2. Connect the AF0500 to a computer using a USB cable. See Section 7.3.
3. Copy the AF0500.bin and AF0500.md5 files to the AF0500 Configuration drive.
4. Disconnect the USB cable. The firmware upgrade will begin. Progress will be shown on the front
panel as progressively-lit green sensor LED’s, starting from Sensor 1 to Sensor 4. The firmware
upgrade can take up to 150 seconds.
5. The AF0500 will restart when the firmware upgrade has been completed.
6. Close the Configuration Software screen (HTA file).
7. Reconnect the AF0500 to the computer as in Step 2.
8. Confirm that the firmware revision shown in the About tab is correct.
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AF0500 Arc-Flash Relay
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COMMISSIONING
With no manual configuration, a freshly unpacked and wired AF0500 will work using the factory
default settings. It will trip the TRIP 1 output if any sensors connected to input 1 or 2 exceed the
default setting of 10 klux, even if a circuit check is reporting a cable to be broken. Likewise, the TRIP
2 output will trip if any sensor connected to input 3 or 4 gives an alarm.
The digital I/O will operate, and if wired to perform upstream circuit breaker tripping or zone merging,
it will work as programmed in the wiring. It is possible to configure these connections in software as
well, if so desired. If both wired and software connections are set up, both will be active, and the
system will perform a logical “OR” between them: if any input, hardware or software, tells a zone to
trip, it will do so.
The INHIBIT input is always active, and will always inhibit a trip from propagating to the TRIPPED
as well as to the TRIP COIL outputs if the input is active.
Littelfuse recommends always doing a full systems test on all sensors and outputs to ensure that
any errors in the cabling or configuration will be detected and can be corrected before the system is
put into normal operation.
CAUTION: Make sure that the area is safe before this test. Ensure that loads and power are
disconnected at the transformers, etc.
8.1 Configuration of Installed Sensors
The AF0500 will auto-detect sensors as they are connected. To reset any errors (shown as blinking
red LED in a position where no sensor is attached), e.g. after moving a sensor to another position
on the unit, press and hold the RESET button for three seconds. This will redetect which sensors,
power supplies, etc. are connected.
8.2 Testing the Sensors
To test the tripping of point sensors, the intensity of light at the sensors needs to rise above 10 klux
(or the defined light immunity setting, if changed). The LED flash on most phones are not sufficient,
nor are most LED flashlights. Most incandescent flashlights (e.g. Mini Maglite with Xenon bulb or
larger) can be used, if the beam can be focused to a very small circle and the flashlight is brought
right next to the sensor. A normal AC light bulb can also be used.
For fiber sensors, the light intensity needs to be above 10 klux on a much larger area, which is not
possible with a flashlight or standard light bulbs. To test fiber sensors, a 300-500 W halogen lamp
or a powerful photo flash with a guide number of at least 15 m (50 ft) is needed. See Section 10.7.
1. Unplug the TRIP outputs to avoid tripping the circuit breakers. If the AF0500 TRIPPED
outputs are connected to other units, unplug these connectors as well.
2. Confirm that there is a solid green LED for each connected optical sensor. This confirms that
sensors are connected and healthy.
3. Confirm that a short red flashing light occurs periodically in each sensor. This indicates that
the sensor circuit is being checked.
4. Point the light source at a sensor and check that the LED on the sensor and the front panel
of the AF0500 turns red continuously. The TRIPPED LED will also turn on. If this does not
happen, the light source may not be powerful enough, especially for fiber sensors.
5. Repeat for the remaining sensors.
6. Check that the indicator LED’s on the front panel of the unit have turned red for all connected
sensors.
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AF0500 Arc-Flash Relay
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7. Press the RESET button to clear the trip indication.
8. Replace any connectors removed to re-establish protection.
8.3 Testing the Trip Coil Outputs and Associated Circuit Breakers
To ensure the system is ready to test, the system should only have supply power. The TRIP COIL
output will be tripped during this procedure. Also be aware that other units connected to the
TRIPPED output will also trip, unless the connection is broken for the test.
1. Confirm that there is a solid green light in the TRIP COIL output LED. This means that the
trip coil is detected and ready to trip.
2. Connect the TRIP input for the zone to COM using a piece of wire, terminals 13 to 16 for
zone 1, terminals 21 to 24 for zone 2.
3. Observe that the connected trip coil operates. The output will reset itself after the configured
pulse time, one second by default.
4. Press the RESET button to reset the trip indication. Reset the tripping device if necessary.
5. Replace any connectors removed to re-establish protection.
6. Repeat for each TRIP COIL output.
8.4 Full Operation Test
To ensure the system is ready to test, the system should only have supply power. The TRIP outputs
on all connected units will be tripped during this procedure.
1. Use the system diagram to find out which circuit breakers should trip for each sensor.
Generally, the system should be set up so that a light on a sensor removes power from any
conductor that the sensor can see.
2. Make a table with a line for each sensor, and mark which circuit breakers should trip in order
to remove power completely from the area. See Table 2.
3. Confirm that there is a solid green LED for each connected optical sensor. This confirms that
sensors are connected and healthy.
4. Confirm that a short red flashing light occurs periodically in each sensor. This indicates that
the sensor circuit is being checked.
5. Move a light source towards the sensor. Confirm that the TRIP output trips and that the LED’s
of the TRIP output and sensor change to red. Confirm that all circuit breakers which supply
the area which the sensor can see have tripped. Note the result in the table.
6. Press RESET on all affected units, and reset the tripping device if necessary.
7. Repeat steps 3 to 6 for the remaining sensors.
8. If the system has upstream circuit breakers or tie circuit breakers, repeat steps 1 to 6, but
with the local circuit breakers disabled by removing the TRIP COIL outputs to these circuit
breakers. This means that the upstream circuit breakers should be the ones to trip for every
sensor.
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AF0500 Arc-Flash Relay
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TABLE 2. SAMPLE TABLE FOR TESTING A SYSTEM.
SENSOR:
SHOULD TRIP THESE CIRCUIT
BREAKERS:
Unit 1, sensor 1
Placed on Left Busbar
Left Incoming and Tie Circuit Breaker
Unit 1, sensor 4
Placed in Tie Circuit Breaker
Cabinet
Left and Right Incoming
Unit 2, sensor 3
Placed at Output 1
Local: Feeder 1
OBSERVED TRIPS:
Upstream if Feeder 1 Fails to Trip: Left
Incoming and Tie Circuit Breaker
Etc.
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AF0500 Arc-Flash Relay
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SUPPORT RESOURCES
The most up-to-date manuals, data sheets, instruction videos, etc. can be found on the AF0500 site
at www.littelfuse.com/AF0500.
The AF0500 is supported through the Littelfuse network of technical sales and distributors. For
installation help and support, please contact your sales representative. Include detailed information
about the installation and application. See Section 2.
9.1 Sending Information For Support
A picture or video of the installation makes it much easier to provide assistance. Also, the
configuration and log files can be very helpful, as is the serial number of the unit.
Attaching the files to the support email can be done like this:
Plug in a USB connector and connect to a computer.
After a few seconds, two new drives appear:
From the LOG drive, select and attach the AF0500.LOG file.
From the CFG drive, select and attach the CONFIG.CFG file.
Provide a single line diagram of the installation with indication of the zone boundaries if possible.
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SPECIFICATIONS
10.1 AF0500
Supply:
Universal:
20 VA, 100 to 240 Vac (+10%, -15%) 50/60 Hz,
8 W, 110 to 250 Vdc (+10%, -20%)
Low Voltage:
4 W, 24 to 48 Vdc (+10%, -20%)
Optical Settings:
External Sensors:
4 Light sensors
Sensor Types:
PGA-LS10, PGA-LS20, and PGA-LS30,
all with sensor check
Immunity Adjustment:
Trip above 10 to 30 klux
Intentional Trip Delay Settings:
0.5 to 200 ms
0.5 ms intentional delay results in a
maximum 0.8 ms total delay
TRIP COIL Outputs:
Type:
IGBT Switch
Configuration:
Normally Open (Form A) isolated contact
UL Rating:
120/240 Vac, 1800 VA, 0.75 A maximum continuous,
125/250 Vdc, 138 VA, 0.75 A maximum continuous
Supplemental Rating:
Make/Carry 0.2 s:
30 A
Voltage Rating:
24 to 300 Vac, 24 to 300 Vdc
Current Rating:
20 A for 2 s, 10 A for 5 s
Control Voltage Alarm:
<15 V
Control Voltage Test type:
Measurement of current through a 100 k parallel resistor
Operating Mode:
Shunt trip or undervoltage trip coil, configurable
Protection:
320 Vac MOV, thermally protected
Isolation:
1,000 Vac
Pulse Duration:
1 to 5 s, configurable
On-State Voltage Drop:
2.5 V at 5 A, 25˚C (77˚F)
4.0 V at 10 A, 25˚C (77˚F)
Output Relays:
ERROR Relay:
Contact Configuration:
Change-over (Form C) isolated contact
Normally energized
UL Rating:
5 A resistive, 150 Vac
5 A resistive, 30 Vdc
0.3 A resistive, 50 Vdc
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Supplemental Contact Rating:
Make/Carry 0.2 s:
30 A
Rating Code:
B300, R300
Break:
dc:
28 W Resistive
ac:
1500 VA (PF=1.0)
360 VA (PF=0.4)
Subject to maximums of 5 A and 150 V (ac or dc)
Tripped Status Relay:
Contact Configuration:
Normally Open (Form A) isolated contact
UL Rating:
100 mA, 50 Vac/Vdc
Supplemental Rating:
Contact Rating:
Terminals:
Torque:
Local Interface:
3 A Resistive, 50 Vac
3 A Resistive, 30 Vdc
Wire Clamping, 22-12 AWG (0.14 to 2.5 mm2) copper
conductors
4 to 5.5 lbf·in (0.45 to 0.62 N·m)
USB 2.0 Full speed Mass storage device
Communications Interface:
Ethernet ports
2 ports, with an internal Ethernet switch
Configuration:
10/100 Mbps, Base TX, Isolated
Protocol:
Modbus® TCP
Internal Real-Time Clock:
Battery:
CR16321
Life:
Minimum 10 years
Dimensions:
Height:
130 mm (5.1 in)
Width:
200 mm (7.9 in)
Depth:
54 mm (2.1 in)
Shipping Weight:
0.9 kg (2 lb)
Mounting:
35 mm DIN rail or surface mount
Environment:
Operating Temperature:
-40 to 70°C (-40°F to 158°F)
Storage Temperature:
-40 to 70˚C (-40°F to 158°F)
Humidity:
93% Non-condensing
www.littelfuse.com
© 2016 Littelfuse
53/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
Altitude:
Below 2,000 m (6,500 ft):
Normal Operation
Above 2,000 m (6,500 ft):
24 Vdc supply only, shunt trip only
Above 4,000 m (13,000 ft):
Contact Littelfuse for further information.
10.2 EMC Tests
Verification tested in accordance with EN60255-26:2013.
1 MHz Burst:
IEC 60255-22-1
± 1 kV differential mode (line-to-line)
± 2.5 kV common mode
Electrostatic Discharge:
IEC 60255-22-2
± 6 kV Contact Discharge (direct and indirect)
± 8 kV Air Discharge
Radiated RF Immunity:
IEC 60255-22-3
10 V/m, 80-1,000 MHz, 80% AM (1 kHz)
10 V/m, 1.4 to 2.7 GHz, 80% AM (1 kHz)
Fast Transient:
IEC 60255-22-4:
Class A: ± 4 kV (on AC mains)
ANSI/IEEE C37.90.1-2002 (Oscillatory and fast transients
on input terminals)
Surge Immunity:
IEC 60255-22-5:
± 4 kV differential mode (on AC lines)
± 2 kV common mode (on AC lines)
± 2 kV differential mode (on DC lines)
± 1 kV common mode (on DC lines)
± 2 kV common mode (on I/O ports)
± 1 kV differential mode (on I/O ports)
Conducted RF Immunity:
IEC 60255-22-6
10 Vrms, 0.15-80 MHz, 80% AM (1 kHz)
Power Frequency:
IEC 60255-22-7
Magnetic Field Immunity:
IEC 61000-4-8
30 A/m and 300 A/m, 50 Hz and 60 Hz
Current Harmonics and Voltage
Fluctuations:
IEC 61000-3-2 and IEC 61000-3-3
Class A
Radiated and Conducted
Emissions:
CISPR 22:2008-09 / EN55022:2010
Class A
Voltage Interruptions:
IEC 60255-11 and IEC 60255-29
100% Interrupts 3 x for
5 ms, 10 ms, 20 ms, 50 ms, 100 ms, 200 ms
www.littelfuse.com
© 2016 Littelfuse
54/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
10.3 Environmental Tests
Cold:
IEC 60068-2-1:2007
Temperature:
-40°C
Duration:
16 hours
Dry Heat:
IEC 60068-2-2:2007
Temperature:
70°C
Duration:
16 hours
Humidity:
50% RH
Damp Heat Cyclic:
Lower Temperature:
Humidity Range:
Upper Temperature:
Humidity Range:
Number of Cycles:
Vibration – Resonance Search:
Frequency Range:
IEC 60068-2-30:2005
25°C
95 – 100 % RH
55°C
90 – 96 % RH
2
IEC 60068-2-6:2007
2 - 100 Hz
Frequency / Amplitude:
2 - 13.2 Hz:
± 1 mm
13.2 – 100 Hz:
± 0.7 g
Sweep Rate:
Max. 1 octave/min.
Number of Axes:
3 mutually perpendicular
Vibration – Endurance Sinusoidal:
Frequency Range:
IEC 60068-2-6:2007
2 - 100 Hz
Frequency / Amplitude:
2 - 13.2 Hz:
± 1 mm
13.2 - 100 Hz:
± 0.7 g
Procedure:
Dwell on found resonances
Dwell conditions:
Q ≥ 2 : 90 minutes at each resonance frequency
Q < 2:
90 minutes 30 Hz
Number of Axes:
3 mutually perpendicular
Vibration – Shock, Seismic:
IEC 60255-21-1
10.4 Safety
Safety:
IEC 61010-1: 2010 3rd Edition
Safety Requirements for Electrical Equipment for
Measurement, Control, and Laboratory Use – Part I
UL508 Industrial Control Equipment
www.littelfuse.com
© 2016 Littelfuse
55/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
10.5 Certification
Certification:
CSA
LR 62897
UL Listed
LISTED
IND.CONT.EQ
4YY5
NRGU.E348169
UL508 Industrial Control Equipment2
Australia
CE, European Union
EMC directive 2004/108/EC: Certified after
IEC/EN 60255-26:2014
Low voltage directive 2006/95/EC: Certified after
IEC/EN 61010-1:2010
FCC
Surge Withstand:
www.littelfuse.com
ANSI/IEEE C37.90.1-2002 (Oscillatory and Fast
Transient)
© 2016 Littelfuse
56/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
10.6 Sensors
PGA-LS10
PGA-LS20 and PGA-LS30
Type:
Point sensor
Fiber-optic sensor
Detection Zone:
180 x 360° (half sphere)
360° along fiber
Output:
0-35 mA
0-35 mA
Electrical Cable:
Shielded 3-wire 20 AWG (0.5
mm2) electrical cable
Shielded 3-wire 20 AWG (0.5 mm2)
electrical cable
Factory Cable Length:
10 m (33 ft) electrical cable
PGA-LS20:
8 m (26 ft) active;10 m (33 ft) total
(2 m (7 ft) shielded),
2 x 10 m electrical cable
PGA-LS30:
18 m (59 ft) active; 20 m (66 ft)
total
(2 m (7 ft) shielded),
2 x 10 m (33 ft) electrical cable
Max. Elec. Cable
Length:
50 m (164 ft)
50 m (164 ft)
Sensor Check:
Built-in LED for visual feedback
Built-in LED for visual feedback
Dimensions:
32 x 52 x 24 mm
(1.3 x 2.0 x 0.9 in)
Transmitter and Receiver:
32 x 56 x 19 mm
(1.3 x 2.2 x 0.7 in)
Enclosure:
IP 30
IP 30
www.littelfuse.com
© 2016 Littelfuse
57/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
10.7 Ordering Information
AF0500-00Options:
Blank - No Conformal Coating
CC - Conformal Coating
Accessories:
PGA-LS10 Point Sensor
PGA-LS20 Fiber-Optic Sensor, 8 m (26 ft) active length
PGA-LS30 Fiber-Optic Sensor, 18 m (59 ft) active length
PGA-0031 DIN-rail mounting brackets
PGA-1100 Diode Logic Unit
PGA-FLSH-00 Photo Flash for commissioning testing
PGA-FLSH-01 Photo Flash, CE and RoHS
10.8 Related Products
PGR-8800 Stand-alone Arc-Flash Relay with 6 sensor inputs, 1 trip coil output, with CT inputs for
current inhibit
10.9 Warranty
The AF0500 Arc-Flash Relay is warranted to be free from defects in material and workmanship for
a period of five years from the date of purchase.
Littelfuse will (at Littelfuse’s option) repair, replace, or refund the original purchase price of a AF0500
that is determined by Littelfuse to be defective if it is returned to the factory, freight prepaid, within
the warranty period. This warranty does not apply to repairs required as a result of misuse,
negligence, an accident, improper installation, tampering, or insufficient care. Littelfuse does not
warrant products repaired or modified by non-Littelfuse personnel.
NOTES:
1
Battery is mounted in an internal socket and should be changed by qualified service personnel
only. Contact your distributor for more information.
2
The AF0500 Arc Flash Relay is currently listed as a protective relay (UL category NRGU) and
complies with the UL508 Industrial Control Equipment standard. UL did not evaluate the functionality
of the arc fault protection afforded by this product. A file review will occur when the requirements for
investigation of arc detection and mitigation systems are developed and additional tests will be
performed if required.
3
AF0500 uses the open source component FreeMODBUS internally. For license, version, and
source-code information please contact [email protected].
www.littelfuse.com
© 2016 Littelfuse
58/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
APPENDIX A MODBUS TCP REGISTER MAP
ADDRESS (BASE 1,
PLC MODE)
DEC
HEX
PARAMETER
ACCESS[R/W]
TYPE
DESCRIPTION
TERMINAL
VALUES
Analog Inputs, Engineering Units (200 - 204)
200
C8h
200
C8h
Word
R
Number of light sensors on system.
na
201
C9h
Word
R
Light on “Sensor 1”
31-34
202
CAh
Word
R
Light on “Sensor 2”
35-38
203
CBh
Word
R
Light on “Sensor 3”
39-42
204
CCh
Word
R
Light on “Sensor 4”
43-46
4
Value on analog input raw engineering units (04056, about 9 lux/unit).
Value on analog input raw engineering units (04056, about 9 lux/unit).
Value on analog input raw engineering units (04056, about 9 lux/unit).
Value on analog input raw engineering units (04056, about 9 lux/unit).
Analog Inputs, Engineering Units (Max Value Since Last MODBUS Read) (300 - 304)
300
12Ch
300
12Ch
Word
R
Number of light sensors on system.
na
301
12Dh
Word
R
Light on “Sensor 1 Max”
31-34
302
12Eh
Word
R
Light on “Sensor 2 Max”
35-38
303
12Fh
Word
R
Light on “Sensor 3 Max”
39-42
304
130h
Word
R
Light on “Sensor 4 Max”
43-46
4
Max value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
Max value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
Max value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
Max value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
Analog Inputs, Engineering Units (Min Value Since Last MODBUS Read) (400 - 404)
400
190h
400
190h
Word
R
Number of light sensors on system.
401
191h
Word
R
Light on “Sensor 1 Min”
31-34
402
192h
Word
R
Light on “Sensor 2 Min”
35-38
403
193h
Word
R
Light on “Sensor 3 Min”
39-42
404
194h
Word
R
Light on “Sensor 4 Min”
43-46
www.littelfuse.com
© 2016 Littelfuse
na
4
Min value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
Min value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
Min value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
Min value seen on analog
input since last MODBUS
read - raw engineering
units (0-4056, about 9
lux/unit).
59/70
AF0500 Arc-Flash Relay
ADDRESS (BASE 1,
PLC MODE)
DEC
HEX
PARAMETER
ACCESS[R/W]
TYPE
DESCRIPTION
Rev. 0-D-040816
TERMINAL
VALUES
na
4
Bit 0=Not Detected, Bit
1=Detected, Bit2=Tripped,
Bit3= Error (Lost - Has
been detected, but is no
longer there.)
Bit0=Not Detected,
Bit1=Detected,
Bit2=Tripped, Bit 3= Error
(Lost - Has been detected,
but is no longer there.)
Bit 0=Not Detected,
Bit1=Detected,
Bit2=Tripped, Bit3= Error
(Lost - Has been detected,
but is no longer there.)
Bit0=Not Detected,
Bit1=Detected,
Bit2=Tripped, Bit3= Error
(Lost - Has been detected,
but is no longer there.)
Sensor Input Status (500 - 504)
500
1F4h
500
1F4h
Word
R
Number of light sensors on system.
501
1F5h
Word
R
Status of “Sensor 1”
31-34
502
1F6h
Word
R
Status of “Sensor 2”
35-38
503
1F7h
Word
R
Status of “Sensor 3”
39-42
504
1F8h
Word
R
Status of “Sensor 4”
43-46
System Status (1100 - 1104)
1100
44Ch
1100
44Ch
Word
R
Number of user-reading status.
na
1101
44Dh
Word
R
Supply 1 Present
1-3
1102
44Eh
Word
R
Supply 2 Present
28-30
1103
44Fh
Word
R
DC Supply Voltage
28-30
1104
450h
Word
R
Error
na
4
Reading: 0=Inactive;
1=Active;
Reading: 0=Inactive;
1=Active;
DC Supply Voltage (In
Integer Volts)
Reading: 0=No errors;
1=Error - Refer To Error
Flags Bitmap
Digital Inputs (1200 - 1207)
Inputs with (optional) cable
monitoring
1200
4B0h
1200
4B0h
word
R
Number of Inputs
1201
4B1h
word
R
Status of Input “RESET”
9-11
1202
4B2h
word
R
Status of Input “INHIBIT 1”
12-16
1203
4B3h
word
R
Status of Input “TRIP 1”
13-16
1204
4B4h
word
R
Status of Input “C/B ON 1”
14-16
1205
4B5h
word
R
Status of Input “INHIBIT 2”
20-24
1206
4B6h
word
R
Status of Input “TRIP 2”
21-24
1207
4B7h
word
R
Status of Input “C/B ON 2”
22-24
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© 2016 Littelfuse
na
7
Reading: 0=Inactive;
1=Active;
Reading: 0=Inactive;
1=Active;
Reading: 0=Inactive;
1=Active;
Reading: 0=Inactive;
1=Active;
Reading: 0=Inactive;
1=Active;
Reading: 0=Inactive;
1=Active;
Reading: 0=Inactive;
1=Active;
60/70
AF0500 Arc-Flash Relay
ADDRESS (BASE 1,
PLC MODE)
DEC
HEX
PARAMETER
ACCESS[R/W]
TYPE
DESCRIPTION
Rev. 0-D-040816
TERMINAL
VALUES
Digital and Relay Outputs (1300 - 1307)
1300
514h
1300
514h
Word
R
Number of Outputs
Status of Physical Outputs
1301
515h
Word
R
Status on Relay “ERROR”
1302
516h
Word
R
Status on Relay “TRIPPED”
7-8
1303
517h
Word
R
Status of Output “C/B FAIL”
10-11
1304
518h
Word
R
Status of Output “TRIPPED 1”
15-16
1305
519h
Word
R
Status of “IGBT TRIP 1”
18-19
1306
51Ah
Word
R
Status of Output “TRIPPED 2”
23-24
1307
51Bh
Word
R
Status of “IGBT TRIP 2”
26-27
NA
4-5-6
7
Reading: 0=Open;
1=Closed;
Reading: 0=Open;
1=Closed;
Reading: 0=Open;
1=Closed;
Reading: 0=Open;
1=Closed;
Reading: 0=Open;
1=Closed;
Reading: 0=Open;
1=Closed;
Reading: 0=Open;
1=Closed;
LED Status (1400 - 1426)
1400
578h
1400
578h
Word
R
Number of LED`s
NA
1401
579h
Word
R
Supply 1
1-2
1402
57Ah
Word
R
Error
1403
57Bh
Word
R
Tripped
1404
57Ch
Word
R
Reset
9
1405
57Dh
Word
R
C/B Fault
10
1406
57Eh
Word
R
Inhibit 1
12
1407
57Fh
Word
R
Trip 1
13
1408
580h
Word
R
C/B On 1
14
1409
581h
Word
R
Tripped 1
15
1410
582h
Word
R
Trip 1 Red
18-19
1411
583h
Word
R
Trip 1 Green
18-19
1412
584h
Word
R
Inhibit 2
20
1413
585h
Word
R
Trip 2
21
1414
586h
Word
R
C/B On 2
22
1415
587h
Word
R
Tripped 2
23
1416
588h
Word
R
Trip 2 Red
26-27
1417
589h
Word
R
Trip 2 Green
26-27
1418
58Ah
Word
R
Supply 2
29-30
1419
58Bh
Word
R
Sensor 1 Red
31-34
1420
58Ch
Word
R
Sensor 1 Green
31-34
1421
58Dh
Word
R
Sensor 2 Red
35-38
www.littelfuse.com
Status of LED
© 2016 Littelfuse
4-5-6
7-8
26
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
61/70
AF0500 Arc-Flash Relay
ADDRESS (BASE 1,
PLC MODE)
DEC
HEX
PARAMETER
ACCESS[R/W]
TYPE
DESCRIPTION
Rev. 0-D-040816
TERMINAL
1422
58Eh
Word
R
Sensor 2 Green
35-38
1423
58Fh
Word
R
Sensor 3 Red
39-42
1424
590h
Word
R
Sensor 3 Green
39-42
1425
591h
Word
R
Sensor 4 Red
43-46
1426
592h
Word
R
Sensor 4 Green
43-46
VALUES
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Bit 0=Off, Bit 1=On, Bit
2=Flashing
Alarms (1500 - 1526)
Internal flags from the last
event - describes where a
trip came from.
1500
5DCh
1500
5DCh
Word
R
Number of status flags available.
1501
5DDh
Word
R
Sensor 1 Fault
31-34
1502
5DEh
Word
R
Sensor 2 Fault
35-38
1503
5DFh
Word
R
Sensor 3 Fault
39-42
1504
5E0h
Word
R
Sensor 4 Fault
43-46
1505
5E1h
Word
R
Supply 1 Off
1-3
1506
5E2h
Word
R
Supply 2 Off
28-30
1507
5E3h
Word
R
Supply 1 Out Of Spec
1-3
1508
5E4h
Word
R
Supply 2 Out Of Spec
28-30
1509
5E5h
Word
R
Internal I/O supply Error
NA
1510
5E6h
Word
R
Internal Sensor Supply Error
NA
1511
5E7h
Word
R
CB 1 Feedback Error
14
1512
5E8h
Word
R
CB 2 Feedback Error
22
1513
5E9h
Word
R
Trip Coil 1 Fault
18-19
1514
5Eah
Word
R
Trip Coil 2 Fault
26-27
1515
5EBh
Word
R
Trip Coil 1 Unpowered
18-19
1516
5ECh
Word
R
Trip Coil 2 Unpowered
26-27
1517
5EDh
Word
R
FW Unspecified Fault
NA
1518
5EEh
Word
R
FW Drive Not Ready
NA
1519
5EFh
Word
R
FW File Not Found
NA
1520
5F0h
Word
R
FW Image Wrong Product Name
NA
1521
5F1h
Word
R
FW Image No signature Found
NA
1522
5F2h
Word
R
FW Image Wrong Size
NA
1523
5F3h
Word
R
FW MD5 File Not Found
NA
www.littelfuse.com
© 2016 Littelfuse
NA
26
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
62/70
AF0500 Arc-Flash Relay
ADDRESS (BASE 1,
PLC MODE)
DEC
HEX
PARAMETER
ACCESS[R/W]
TYPE
DESCRIPTION
Rev. 0-D-040816
TERMINAL
1524
5F4h
Word
R
FW Error MD5 Fault
NA
1525
5F5h
Word
R
Ethernet Peer To Peer Alarm
NA
1526
5F6h
Word
R
Trip Condition While Inhibited
NA
www.littelfuse.com
© 2016 Littelfuse
VALUES
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
Reading: 0=Inactive,
1=Active
63/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
APPENDIX B INSTALLATION LOG SHEET
GENERAL INSTALLATION
SETTINGS
MIN
DEFAULT
MAX
UNIT
COMMENTS
Date Installed
Operator
Comment 1
Comment 2
GENERAL
System Name
Description Of This Unit
AF0500 Arc-Flash Relay
Date And Time
Synchronize To PC Clock
Disabled
 Enabled
 Disabled
LIGHT SENSORS
Common Settings
Light Immunity Lower Limit
Arc Detection Time Before Tripping
10
10
25
klux
_________ klux
0
(Effective
0.8)
1
20,000
ms
_________ ms
Light Sensor 1
Sensor Status
Sensor Description
Change Configuration
Sensor 1
No Change
 Sensor Present
 No Sensor Detected
 Sensor Missing
 Sensor Tripped
___________________
 No Change
 No Sensor Expected
 Sensor Expected
Light Sensor 2
Sensor Status
Sensor Description
Change Configuration
Sensor 2
No Change
 Sensor Present
 No Sensor Detected
 Sensor Missing
 Sensor Tripped
___________________
 No Change
 No Sensor Expected
 Sensor Expected
Light Sensor 3
Sensor Status
Sensor Description
Change Configuration
Sensor 3
No Change
 Sensor Present
 No Sensor Detected
 Sensor Missing
 Sensor Tripped
___________________
 No Change
 No Sensor Expected
 Sensor Expected
Light Sensor 4
Sensor Status
Sensor Description
Change Configuration
www.littelfuse.com
Sensor 4
No Change
© 2016 Littelfuse
 Sensor Present
 No Sensor Detected
 Sensor Missing
 Sensor Tripped
___________________
 No Change
 No Sensor Expected
 Sensor Expected
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AF0500 Arc-Flash Relay
GENERAL INSTALLATION
SETTINGS
MIN
DEFAULT
Rev. 0-D-040816
MAX
UNIT
COMMENTS
COMMON CONTROL BLOCK
Nothing To Configure
ZONE 1
 Light Sensor 1
 Light Sensor 2
 Light Sensor 3
 Light Sensor 4
 CB Feedback Failure
Zone 1 / TRIP 1 Trips On
 Light Sensor 1
 Light Sensor 2
 Light Sensor 3
 Light Sensor 4
 CB Feedback Failure
Trip Input
Enabled
Enabled
 Enabled
 Disabled
Enabled
Enabled
Function
CB is conducting power when
input is floating.
 Enabled
 Disabled
 CB is conducting power when
input is pulled low.
 CB is conducting power when
input is floating.
CB ON Input
Trip Output
Circuit Breaker Type
Circuit Breaker Pulse Time
Report An Error If Trip Coil Is Not
Detected
ZONE 2
 Shunt Coil (Trips When
Powered)
 Undervoltage Coil (Closed
While Powered)
Shunt Coil (Trips When
Powered)
1
1
5
seconds
Enabled
 Enabled
 Light Sensor 1
 Light Sensor 2
 Light Sensor 3
 Light Sensor 4
 CB Feedback Failure
Zone 2 / TRIP 2 Trips On
 Disabled
 Light Sensor 1
 Light Sensor 2
 Light Sensor 3
 Light Sensor 4
 CB Feedback Failure
Trip Input
Enabled
Enabled
 Enabled
 Disabled
Enabled
Enabled
Function
CB is conducting power when
input is floating.
 Enabled
 Disabled
 CB is conducting power when
input is pulled low.
 CB is conducting power when
input is floating.
CB ON Input
Trip Output
Circuit Breaker Pulse Time
Report An Error If Trip Coil Is Not
Detected
COMMUNICATION
TCP IP Address
Manual IP Address
TCP/IP Subnet Mask
TCP/IP Default Gateway
www.littelfuse.com
 Shunt Coil (Trips When
Powered)
 Undervoltage Coil (Closed
While Powered)
Shunt Coil (Trips When
Powered)
Circuit Breaker Type
1
1
 Enabled
 Manual Fixed IP
192.168.0.99
5
seconds
 Enabled
 Manual Fixed IP
 Automatic (DHCP)
 Automatic (AUTO IP)
___.___.___.___
255.0.0.0
___.___.___.___
192.168.0.1
___.___.___.___
© 2016 Littelfuse
 Disabled
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AF0500 Arc-Flash Relay
GENERAL INSTALLATION
SETTINGS
MIN
DEFAULT
Rev. 0-D-040816
MAX
UNIT
COMMENTS
ADVANCED
Possibility To Reset Configuration
And Drives – No Setup Parameters
ALARMS
Shows Currently Standing Alarms
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© 2016 Littelfuse
66/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
APPENDIX C REDUNDANT TRIP CIRCUIT DESCRIPTION
This section details what inputs and outputs are active when the redundant path is activated due to
the CPU not running. An independent hardware watchdog stops blocking a hardware path from the
trip detection circuits and directly to the outputs.
In this scenario the software is by definition not running, therefore the following functionality is
inactive:

Any programmed delays – everything is directly connected with no intentional delay

Sensor presence check and health indication

Any services on the network interface

USB configuration and log access

Inhibit functions

C/B ON and C/B FAIL functions (therefore upstream circuit breaker function won’t work)

LED’s will stay in the configuration they had when the software stopped running. Flashing
will not work, so LED’s which were flashing may be either fully on or off.
Tripping from light and inputs signals will work due to the redundant hardware, but with a simpler
setup according to the table below. The ERROR relay will be in the correct state, indicating a unit
error. Greyed out inputs and outputs are not read or driven.
Output
Input
INHIBIT 1
TRIP 1
C/B FB 1
INHIBIT 2
TRIP 2
C/B FB 2
RESET
RESET Button
SENSOR 1
SENSOR 2
SENSOR 3
SENSOR 4
TRIP COIL 1
(NOTE 1)
TRIPPED
Output 1
X
X
X
X
X
X
X
X
X
X
TRIP COIL 2
(NOTE 1)
TRIPPED
Output 2
X
X
X
X
X
X
X
X
X
X
TRIPPED
Relay
C/B FAIL
Output
ERROR
Relay
X
X
X
X
X
X
X
X
X
X
X
X
NOTE 1: When SW runs these outputs are pulsed – When controlled via redundant HW, they are
held statically as long as the sensor reports light over the threshold, only protected by a thermal
protection circuit (IGBT will disable when too hot).
NOTE 2: All light sensor inputs trip both TRIP COILS – normal zone setup is not respected.
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© 2016 Littelfuse
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
APPENDIX D
AF0500 REVISION HISTORY
MANUAL RELEASE
DATE
MANUAL REVISION
April 8, 2016
September 16, 2015
June 1, 2015
March 2, 2015
0-D-040816
0-C-091615
0-B-060115
0-A-030215
HARDWARE REVISION
(REVISION NUMBER ON
PRODUCT LABEL)
FIRMWARE REVISION
1
1.00.01
0
1.00.00
MANUAL REVISION HISTORY
Revision 0-D-040816
Section 4
Fig. 7 updated.
Section 7
Section 7.5 added.
Revision 0-C-091615
Section 4
Sensor installation and removal notes added.
Revision 0-B-060115
Section 4
Fig. 4 updated.
Section 5
Figs. 10, 11, 12, and 14 updated.
COM terminal note added to Section 5.4.
Coil note added to Section 5.6.
Section 6
Supply voltage updated in Section 6.1.2.
Section 7
Screen examples added.
Section 10
CSA certification added.
CE EMC standards updated.
Output relay specifications updated.
Appendix C
Table updated.
Revision 0-A-030215
Initial release.
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© 2016 Littelfuse
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AF0500 Arc-Flash Relay
Rev. 0-D-040816
HARDWARE REVISION HISTORY
Hardware Revision 1
Minor production changes.
Hardware Revision 0
Initial release.
FIRMWARE REVISION HISTORY
Firmware Revision 1.00.01
PCB ID updated.
Firmware Revision 1.00.00
Initial release.
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69/70
AF0500 Arc-Flash Relay
Rev. 0-D-040816
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