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3RV1 Circuit Breaker/MSP
SIRIUS System Manual
2-22 GWA 4NEB 430 0999-02 DS 01
Alarm switch (signal-
ling switch) signals
The alarm switch has two signals:
• Tripped (Short-circuit, overload or tripping through a shunt trip)
• Short circuit signal (Short circuit only)
The following table lists the signals, the status of the alarm switch, and the
procedure required:
Drawing Status Procedure
Tripped signal
Circuit breaker/MSP is
in the tripped position
Alarm switch:
LED is Red
RESET button (blue):
remains depressed
Switch off (Off position) and
then switch on again (On posi-
tion of the circuit breaker/
MSP)
Short circuit
Circuit breaker/MSP is
in the tripped position
Alarm switch:
LED is Red
RESET button (blue):
pushed out
Push in the RESET-button
(blue) on the Alarm switch
then switch the circuit
breaker/MSP off (Off posi-
tion) and
then switch it back on again
(On position of the circuit
breaker/MSP)
Table 2-8: Alarm switch with tripped signal and short circuit signal
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