Chapter 2) 7XG3124 Application Guide
©2014 Siemens Protection Devices Limited
Chapter 2 Page 40 of 42
5.5 Arc Sensor Indicators
Indicate solid when an Arc Sensor has detected an Arc, the LEDs are reset after pressing the Flag
Reset.
16 Arc Sensor Indicators
A flashing Arc Sensor LED indicates a failure of the sensor, refer to the Sensor Alarm indicator
description.
5.6 Arc Sensor Circuit Supervision
Indicates solid when an Arc Sensor has faulted either due to an open circuit, sustained short circuit
( >10 sec ) or high ambient lighting.
Sensor Alarm
The affected sensor will be indicated by its front panel sensor LED 1-16 flashing. The Sensor Alarm will self
reset upon the fault conditions being corrected.
5.7 Arc Trip
Indicates solid when the respective assigned self reset Arc Trip contacts operate. The LEDs reset when the
Arc Trip contacts self reset.
Arc Trip
Figure 50: RA24 Arc Sensor Indications
Figure 51: RA24 Arc Sensor Cicuit Supervision
Figure 52: RA24 Arc Trip Indication