Manual 37128A GCP-20 Series - Genset Control
© Woodward Page 47/190
Power Circuit Breaker Monitoring
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Add-On Time Monitoring
If the mask "Sync. time control" is set to "ON", time monitoring of the synchronization is effected (monitoring of
the connect time for induction generators) : If the synchronization of the GCB or MCB is started, the time
counter is started following the expiry of delayed motor monitoring. If after the preset time, the power circuit
breaker has not been closed, the warning message "Synchronization time of the GCB exceeded" (for induction
generators "Connect time of the GCB exceeded") or "Synchronization time of the MCB exceeded" is output as an
F1-alarm.
Circuit Breaker Monitoring
NOTE
If during active "MCB monitoring", circuit breaker monitoring, an alarm is detected on closing the MCB,
this is carried out during activated emergency power.
while CLOSING
If the screen "Supervision GCB" or "Supervision MCB" is set to "ON", monitoring of the
generator and mains circuit breakers is carried out (exception: The power circuit breaker
logic is set to "EXTERNAL"). If the circuit breaker cannot be activated by the fifth attempt,
an alarm class F1 "GCB failure" or "MCB failure" alarm message is output. In the relay
manager (see chapter
Relay Manager from page 158) a relay is set with the parameter 74
or 75.
while OPENING
If 2 seconds following an OPEN-pulse (opening of the GCB or MCB) the response is de-
tected that the GCB or MCB is closed, this also leads to the output of an alarm with the mes-
sage "GCB failure" or "MCB failure". In the relay manager, a relay is set with the parame-
ter 76 or 77.
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