ETAL ESS22-TA-011-DC24V8A Double pole electronic circuit breaker with physical isolation at load output Datasheet

Double Pole Electronic Circuit Breaker ESS22-T
Description
The electronic circuit breaker type ESS22-T extends the E-T-A product
range of electronic circuit protection for DC 24 V applications. It is a double
pole version providing physical isolation. It meets the requirements of the
machinery directive 2006/42/EC and the affiliated standard EN 60204-1
“Safety of Machinery, Electrical Equipment of Machines”, para 9.4.3.1.
The combination of active electronic current limitation in the event of a
short circuit and overload disconnection from 1.1 times rated current provides double pole selective protection of DC 24 V load systems.
DC 24 V power supplies, which are widely used in industry today, will shut
down the output in the event of an overload with the result that one faulty
load in the system can lead to complete disconnection of all loads. As well
as an unidentified failure this also means stoppage of the whole system.
Through selective disconnection the ESS22-T responds much faster to
overload or short circuit conditions than the switch-mode power supply.
This is achieved by active current limitation. The ESS22-T limits the highest
possible current to typically 1.4 times the selected rated current. Thus it
is possible to switch on capacitive loads of up to 20,000 µF, but they are
disconnected only in the event of an overload or short circuit.
For optimal alignment with the characteristics of the application the current
rating of the ESS22-T can be selected in fixed values from 0.5 A...10 A.
Failure and status indication are by a multicolour LED and integral signal
contacts. Remote operation is possible by means of a physically isolated
control input. The manual ON/OFF button allows separate actuation of
individual load circuits.
The ESS22-T, with a width of only 22.5 mm, can be snapped onto symmetrical rails ensuring ease of installation and saving space in control
cabinets.
Upon detection of overload or short circuit in the load circuit, the MOSFET
of the load output will be blocked to interrupt the current flow. In addition
the load output will be physically isolated by a mechanical switching element. Upon failure remedy the load output of the ESS22-T is re-activated
manually by operating the ON/OFF switch on the device or optionally by
the physically isolated reset input and/or the control input.
US patent number: US 6,490,141 B2
Features
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Double pole electronic circuit breaker with physical isolation at
load output
Double protection of “load+ path” through electronic protection
and failsafe element
Double protection of “load- path” through electronic protection and
failsafe element
Selective load protection, electronic trip curve
Active current limitation for safe connection of capacitive loads up
to 20,000 µF, DC motors and on overload/short circuit
Fixed current ratings 0.5 A...10 A
Low voltage monitoring
Manual ON/OFF button
Physically isolated control input for ON/OFF optional
Physically isolated reset input RE optional
Clear status and failure indication through multicolour LED
Two signal contacts (break contact and make contact)
Width per unit 22.5 mm
Rail mounting
Approvals
Authority
Standard
Rated voltage
Current ratings
VDE
EN 60934
DC 32 V
0.5 A…10 A
UL
UL 1077
C22.2 No 235
DC 30 V
0.5 A…10 A
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ESS22-T
Technical data
Operating data
Operating voltage US
Current rating IN
Closed current I0
(Tambient = 25 °C, operating voltage US = DC 24 V)
DC 24 V (18...32 V)
fixed current ratings: 0.5 A, 1 A, 2 A, 3 A,
4 A, 6 A, 8 A, 10 A
ON condition: typically 27 mA
with signal output: typically 37 mA
l multicolour LED:
Status indication
by means of GREEN:
- unit is ON, load circuit switched on
ORANGE:
- in the event of overload or short
circuit until disconnection
RED:
- after overload/short circuit disconnection
- upon low voltage in ON condition
- after switch-on till the end of
the ON delay period OFF:
- switched off by means of switch or
control input
- no operating voltage applied
l potential-free signal contact
l ON/OFF condition of switch
Load circuit
Load output
Power-MOSFET and relay switching
output with physical isolation, plus and minus-switching
Overload disconnection typically 1.1 x IN (1.05...1.35 x IN)
Short-circuit current IK
active current limitation typically 1.4 x IN
(see table 1)
Trip times see time/current characteristics
typically 3 s at ILoad > 1.1 x IN
typically 100 ms…3 s at ILoad > 1.4 x IN
Temperature disconnection internal temperature monitoring with
electronic disconnection
Low voltage monitoring OFF at typically < 16.0 V
ON at typically > 17.5 V
automatic switch ON or OFF
Starting delay tStart typically 0.5 sec
after every switch-on, after reset and
after applying US
Disconnection of load circuit double pole, with physical isolation
- manually on the breaker via ON/OFF
switch (OFF)
- after overload/short circuit disconnection
- via external control input
- at low voltage
- no operating voltage applied
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4
Double Pole Electronic Circuit Breaker ESS22-T
Technical data
Technical data
(Tambient = 25 °C, operating voltage US = DC 24 V)
Reset after overload or short circuit disconnection
- remedy the external overload or short circuit failure
- manual RESET on the breaker via
ON/OFF switch
- no reset with voltage interruptions
(status memory)
- no reset possible via external control
input IN
- external reset optionally possible via
reset input RE
Free-wheeling circuit
external free-wheeling diode recommended with inductive load
Load outputs must not be connected in parallel
Status output SF
ESS22-TA-0x1
Electrical data
potential-free signal contact
1 break contact, terminal 11-12
(closed in OFF or failure condition)
1 make contact, terminal 13-14
(open in OFF or failure condition)
max. DC 30 V / 0.5 A, min. 10 V / 10 mA
Fault
signal output fault conditions:
- ON/OFF switch is in OFF position (manually)
- after overload/short circuit disconnection
- external control input (OFF)
- low voltage
- no operating voltage US
Control input IN+/INESS22-TA-01x / ESS22-TA-03x
Electrical data
control input (IN+/IN-) is physically isolated
from load circuit (optocoupler)
voltage max. + DC 32 V
high > DC 12 V ≤ DC 32 V (switch on)
low ≤ DC 5 V > 0 V (switch off)
current consumption typically 3…9 mA
(DC +12 V…32 V)
4
Reset function
ESS22-TA-03x
A non-conducting load output (after an
overload/short circuit disconnection) can
be reset externally via the control input. In
order to do that the control input has to be
switched off for >100 ms
Links
Reset input RE+ / REElectrical data
Reset signal RE
General data
Fail-safe element
manual ON/OFF switch on breaker is linked
to the external control input IN+ by means
of an AND function
ESS22-TA-02x
reset input (RE+ / RE-) physically isolated
from load circuit (optocoupler)
voltage: max. + DC 32 V
high > DC 12 V ≤ DC 32 V
low ≤ DC 5 V > 0 V
power consumption typically 3…9 mA
(DC +12 V…32 V)
min. pulse duration for RESET 100 ms
The electronically blocked load output
(blocked after overload/short circuit
disconnection) may be reset via an external
reset pulse (+ DC 24 V). A common reset signal can be applied to
several devices simultaneously.
RESET - pulse/edge from low (min. 100 ms)
to high (min. 100 ms)
2
(Tambient = 25 °C, operating voltage US = DC 24 V)
Terminals
Screw terminalsM3
Max. cable cross section
Rigid / flexible 0.14 – 2.5 mm2 (AWG 26-14)
Wire stripping length8 mm
Tightening torque (EN 60934) 0.5 – 0.6 Nm
Loop through option redundant LINE and LOAD terminals,
max. cont. load for line entry 10 A
Housing material
moulded
Mounting
symmetrical rail to EN 50022-35x7.5
Ambient temperature
0...+50 °C (without condensation, see EN 60204-1)
Storage temperature
-20...+70 °C
Humidity
Vibration
Degree of protection
Standards, directives
Insulation co-ordination
(IEC 60934)
Insulation voltage
Dielectric strength
Reverse polarity protection
Dimensions
Mass
96 hrs/95 % RH/40 °C to
IEC 60068-2-78, test Cab.
climate class 3K3 to EN 60721
3 g, test to IEC 60068-2-6 test Fc
housing: IP20 DIN 40050
terminals: IP20 DIN 40050
CE logo to EMC directive
emitted interference:
EN 61000-6-3
immunity to interference: EN 61000-6-2
surge voltages: EN 61000-4-5
0.5 kV/2 pollution degree 2
DC 500 V
between the physically isolated areas:
load circuit in OFF condition, signal input
and signal outputs
max. DC 32 V
integral
see following page (tolerances to DIN ISO 268 part 1 ± IT 13)
approx. 110 g
Table 1: voltage drop, current limitation, max. load current
current
rating IN
typically voltage
drop UON at IN
active current
limitation (typically)
max. load current at
100 % ON duty
Tamb = 40 °C Tamb = 50 °C
0.5 A
80 mV
1.4 x IN
0.5 A
0.5 A
1A
110 mV
1.4 x IN
1A
1A
2A
140 mV
1.4 x IN
2A
2A
3A
100 mV
1.4 x IN
3A
3A
4A
130 mV
1.4 x IN
4A
4A
6A
180 mV
1.4 x IN
6A
6A
8A
130 mV
1.4 x IN
8A
7A
10 A
170 mV
1.4 x IN
10 A
9
Attention: when mounted side-by-side without convection the ESS22-T should not carry
more than 80 % of its rated load with 100 % ON duty due to thermal effects.
failsafe element aligned to rated current
(back-up fuse)
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Double Pole Electronic Circuit Breaker ESS22-T
Ordering information
Time/Current characteristic curve (TA = 25 °C)
Type No.
ESS22 double pole electronic circuit breaker, with current limitation
Mounting and design
TA rail mounting, with ON/OFF switch
Version
0 with double pole physical isolation at load output
Signal input
0 without signal input
1 with control input IN-/IN+; without reset function
upon overload
2 with reset input RE-/RE+
3 with control input IN-/IN+; with reset function upon
overload (only for ESS22-TA-xxx)
Signal output
0 without signal output (only for version TA-00)
1 signal contacts: 1 make contact, 1 break contact
Operating voltage
DC 24 V rated voltage DC 24 V
Current rating
0.5 A
1A
2A
3A
4A
6A
8A
10 A
ESS22 - TA - 0
0
1 - DC 24 V
4A
disconnection
typically 1.1 x IN
current limitation
typically 1.4 x IN
10000
1000
trip time in seconds
100
10
3
1
0.1
0.01
0
1
2
IK
4
3
...times rated current
l
The trip time is typically 3 s in the range between 1.1 and 1.4 x IN
l
Electronic current limitation occurs at typically 1.4 x IN which
means that under all overload conditions (independent of the
power supply and the resistance of the load circuit) the max.
overload before disconnection will not exceed 1.4 x IN) times
the current rating. Trip time is between 100 ms and 3 sec
(depending on overload or at short circuit).
l
Without this current limitation a considerably higher overload
current would flow in the event of an overload or short circuit.
ordering example
Please note:
l The user should ensure that the cable cross sections of the relevant
load circuit are suitable for the current rating of the ESS22-T used.
l Automatic start-up of machinery after shut down must be prevented
(Machinery Directive 98/37/EG and EN 60204-1). In the event of a
short circuit or overload the ESS22-T ensures double pole physical
isolation of the load circuit.
Dimensions
Preferred types
ESS22-TA-...
Standard current ratings (A)
0.5
1
2
3
4
6
8
10
x
x
x
x
x
x
x
x
ESS22-TA-001-DC24V
92
3.62
Schematic diagram ESS22-TA-011
13
11
1.1
1.2 3.1
LINE+
external
control input
3.2
A1
A2
B1
IN+
LINE-
85
3.35
line entry
DC 24 V
symmetrical rail EN 50022-35x7.5
(not included in delivery)
Preferred types
4
22.5
.886
ok
3A
on
off
reset
ESS 22-T
B2
IN-
Failsafe
electronic
protection
with current
limitation
|>
|>
LED
electronic
control unit
main
contacts
Si
LOAD+
12
14
2.1
ON/OFF/RESET
switch
LOAD-
2.2 4.1
4.2
load
All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.
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Double Pole Electronic Circuit Breaker ESS22-T
Terminal wiring diagrams ESS22-TA-... (Example)
Terminal connection
ESS22-TA-031-DC 24 V-xxx A
ESS22-TA-000-DC 24 V-xxx A
Example:
B2
IN14
13
11
symmetrical rail
LOAD+ 2.1 2.2
4.1 4.2 LOAD-
B1
A2
3.1 3.2 LINE-
4.1 4.2 LOAD-
LINE+ 1.1 1.2
GERMANY
LOAD+ 2.1 2.2
Elektronischer Schutzschalter
Electronic Supplymentary Protector
ESS22-TA-031-DC24V-xxA
IN+
A1
3.1 3.2 LINE-
12
LINE+ 1.1 1.2
LINE+ / LINE1.1/1.2/3.1/3.2
IN+ / INA1/A2/B1/B2
GERMANY
Elektronischer Schutzschalter
Electronic Supplymentary Protector
ESS22-TA-000-DC24V-xxA
ESS22-TA-011-DC 24 V-xxx A
break contact / make contact
11/12/13/14
LOAD+ / LOAD2.1/2.2/4.1/4.2
GERMANY
Elektronischer Schutzschalter
Electronic Supplymentary Protector
ESS22-TA-011-DC24V-xxA
LINE+ 1.1 1.2
3.1 3.2 LINE-
11
IN+
A1
12
A2
13
B1
B2
IN-
14
LOAD+ 2.1 2.2
4.1 4.2 LOAD-
4
ESS22-TA-031-DC 24 V-xxx A
GERMANY
Elektronischer Schutzschalter
Electronic Supplymentary Protector
ESS22-TA-031-DC24V-xxA
LINE+ 1.1 1.2
3.1 3.2 LINE-
11
IN+
A1
12
A2
13
B1
B2
IN-
14
LOAD+ 2.1 2.2
4
4.1 4.2 LOAD-
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1646
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