The document describes a two-part arc fault protection system consisting of an arc sensor and arc fault module. The arc sensor detects arc flashes and sends a signal to the arc fault module. The arc fault module then triggers an overcurrent relay to trip the circuit breaker within 2 milliseconds of detecting an arc flash. The system provides fast arc fault detection and protection for switchgear.

1. Arc Fault Protection
relay monitoring systems pty ltd
r www.rmspl.com.au

2. The Arc Fault Protection System
Two Part System
ARC Fault
ARC Sensor Module

3. 1S30
Arc Sensor
1S30A
 Single through hole sensor
 3m detection range
 5 – 6 m spacing
1S30B
 Dual sensor
 5 – 6 m spacing

4. 1S30
Arc Sensor
♦ Mounted in each segregated
switchgear chamber
♦ Provides detection in the forward
direction through 180º
♦ Also detects reflected arc light -
so mounting position not critical
♦ Insensitive to day light or general
artificial lighting

5. 1S30
Arc Sensor Installation
SENSOR LOCATIONS

6. 1S30
Arc Sensor Installation
SENSOR LOCATIONS

7. 1S23
Arc Fault Module
Makes an
Overcurrent Relay
ARC Fault protection
ready
Fast ARC Fault
detection
Total detection and
operate time < 2 ms
Single Sensor
or
2 Sensor Version

8. 1S23
Arc Fault Module
ARC Detection Output
ARC Sensor
Supervision and
Module Fail Output
Mounts on a 35mm
DIN rail
Terminations via M4
screw terminals
And 0.75 sqmm flying
leads

9. 1S23
Arc Fault Module Connections
Module Outputs
Blue - ARC Fault
White - Supervision
(-) Supply
(+) Supply
Sensor
Connections

10. 1S23 Application
1S23 is Designed to Interface with an Overcurrent Relay
1S23 Outputs are fed into the Binary inputs of the
Overcurrent Relay
The Overcurrent Relay is needed to perform the Circuit
Breaker Tripping and 1S23 Supervision Alarming
An ARC trip may be Current Checked using a fast
Overcurrent element in the Overcurrent Relay
The ARC trip may also be implemented without any form
of interlocking using the Overcurrent Relay

11. 1S23
Schematic Application
POS
Connection of the
2 (+) 3 4
A rc S ensor
Input
1S23 1S23 to the DC
Supply
A RC
S UP E RV IS ION
FA ULT
1 (-) B W
NEG

12. 1S23
Schematic Application
POS
2 (+) 3 4
A rc S ensor
Input
1S23
A RC
S UP E RV IS ION
FA ULT
1 (-) B W
Overcurrent Relay
and connection of
an Overcurrent
A RC
FA ULT
S UP V
output to the CB
Trip coil
INP UT INP UT
(-) (+) ( -) (+)
I>
OVERCURRENT RELAY
(not all connections shown ) Standard
Overcurrent
Protection
52a
CIRCUIT BREAKER
TRIP COIL
CIRCUIT BREAKER SHOWN IN THE
OPEN POSITION
NEG

13. 1S23
Schematic Application
POS
2 (+) 3 4
A rc S ensor
Input
1S23
Connection of ARC
A RC
S UP E RV IS ION
FA ULT
FAULT TRIP output
1 (-) B W
to the CB Trip
circuit
A RC
S UP V
FA ULT
INP UT INP UT
(-) (+) ( -) (+)
ARC
I> FAULT
OVERCURRENT RELAY TRIP
(not all connections shown )
52a
SCHEMATIC SHOWING TRIPPING OF
CIRCUIT BREAKER VIA ALLOCATED
ARC FAULT TRIP OUTPUT OF
OVERCURRENT RELAY CIRCUIT BREAKER
TRIP COIL
CIRCUIT BREAKER SHOWN IN THE
OPEN POSITION
NEG

14. 1S23
Schematic Application
POS
SENSOR
INPUTS
Connection of ARC
Sensor Inputs to
the 1S23
}
2 (+) 3 4
A rc S ensor
Input
1S23
A RC
S UP E RV IS ION
FA ULT
1 (-) B W
A RC
S UP V
FA ULT
INP UT INP UT
(-) (+) ( -) (+)
ARC
I> FAULT
OVERCURRENT RELAY TRIP
(not all connections shown )
52a
SCHEMATIC SHOWING TRIPPING OF
CIRCUIT BREAKER VIA ALLOCATED
ARC FAULT TRIP OUTPUT OF
OVERCURRENT RELAY CIRCUIT BREAKER
TRIP COIL
CIRCUIT BREAKER SHOWN IN THE
OPEN POSITION
NEG

15. 1S23
Schematic Application
POS
SENSOR
INPUTS
Connection of ARC
FAULT and
SUPERVISION
flying leads to
Overcurrent Relay
}
2 (+) 3 4
A rc S ensor
Input
1S23
A RC
FA ULT
S UP E RV IS ION
Switched negatives
1 (-) B W employed on 1S23
B LUE WHITE
Must connect to
A RC
FA ULT
INP UT
S UP V
INP UT
segregated relay
(-) (+) ( -) (+)
inputs
ARC
I> FAULT
OVERCURRENT RELAY TRIP
(not all connections shown )
52a
SCHEMATIC SHOWING TRIPPING OF
CIRCUIT BREAKER VIA ALLOCATED
ARC FAULT TRIP OUTPUT OF
OVERCURRENT RELAY CIRCUIT BREAKER
TRIP COIL
CIRCUIT BREAKER SHOWN IN THE
OPEN POSITION
NEG

16. 1S23
Schematic Application
POS
SENSOR
INPUTS
Positive supply
}
2 (+) 3 4
A rc S ensor
Input
1S23 connection to
complete the ARC
A RC
FA ULT
S UP E RV IS ION FAULT and
1 (-) B W
SUPERVISION
B LUE WHITE
circuits
A RC
S UP V
FA ULT
INP UT INP UT
(-) (+) ( -) (+)
ARC
I> FAULT
OVERCURRENT RELAY TRIP
(not all connections shown )
52a
SCHEMATIC SHOWING TRIPPING OF
CIRCUIT BREAKER VIA ALLOCATED
ARC FAULT TRIP OUTPUT OF
OVERCURRENT RELAY CIRCUIT BREAKER
TRIP COIL
CIRCUIT BREAKER SHOWN IN THE
OPEN POSITION
NEG

17. 1S23
Schematic Application
POS
SENSOR
INPUTS
}
2 (+) 3 4 ARC FAULT TRIP LOGIC :
A rc S ensor
Input
1S23
ARC FAULT INPUT
A RC
FA ULT
S UP E RV IS ION
ARC FAULT TRIP
1 (-) B W
B LUE WHITE
O/C PICKUP
A RC
S UP V
FA ULT
INP UT INP UT
Overcurrent Check
(-) (+) ( -) (+)
ARC
I> FAULT Logic for the ARC
OVERCURRENT RELAY TRIP
(not all connections shown ) FAULT TRIP
52a
SCHEMATIC SHOWING TRIPPING OF
CIRCUIT BREAKER VIA ALLOCATED
ARC FAULT TRIP OUTPUT OF
OVERCURRENT RELAY CIRCUIT BREAKER
TRIP COIL
CIRCUIT BREAKER SHOWN IN THE
OPEN POSITION
NEG

18. 1S23
Module Dimensions
An array of 1S23 modules
to cater of multiple sensor
applications

19. Module Indications

20. Module Indications
Single Sensor Version :
Both LEDs flash 3 times
POWER UP TEST
Two Sensor Version :
Both LEDs flash 4 times

21. Module Indications
SYSTEM HEALTHY Green Solid

22. Module Indications
POWER FAILURE or
Green LED Extinguished
1S23 SYSTEM FAIL

23. Module Indications
SENSOR SUPERVISION
Green Flashing
FAIL

24. Module Indications
ARC FAULT PICKUP Red Solid (for 2 sec)

25. 1S23 Application with external
current check
Trip CB
ARC Fault Coverage of a
Feeder Exit
Sensors installed in the CT 1S23 and Overcurrent
chamber Relay combination provide
CB Tripping
Arc Sensor 1S30
Overcurrent
1S23
Sensors installed in the Relay
Cable Termination
chamber
Arc Sensor 1S30

26. 1S23 Application with external
current check
ARC Fault Coverage of a
Bus chamber and Feeder
CB chambers Overcurrent
Relay
Multiple 1S23 modules and
Overcurrent Relay
Sensors installed in the combination provide CB
Bus chamber Tripping
Trip CB
1S30 Arc Sensor Arc Sensor 1S30
1S23 1S23
Sensors installed in the CB
1S30 Arc Sensor Arc Sensor 1S30
chamber
Trip CB Trip CB
Overcurrent Overcurrent
Relay Relay

27. 1S23 Application with external
current check
ARC Fault Coverage of the
Bus chambers and Feeder
CB chambers Overcurrent
Relay A modular approach allows
the ARC Fault Coverage to
ARC Fault Coverage for the be extended
Feeder Exits
Trip CB
1S30 Arc Sensor Arc Sensor 1S30
1S23 1S23
1S30 Arc Sensor Arc Sensor 1S30
Trip CB Trip CB
Arc Sensor 1S30 Arc Sensor 1S30
Overcurrent Overcurrent
1S23 Relay 1S23 Relay
Arc Sensor 1S30 Arc Sensor 1S30

28. 1S23 Ordering Code

29. 1S30 Ordering Code

30. Budget pricing
 1S23 ARC Fault Module
1 sensor inputs $175
2 sensor inputs $200
1S30 ARC Fault Sensors
Single point sensor $70
Dual point sensor $95
Made to order : lead time 6 weeks

31. THANK YOU