Manual 37278B GCP-30 Series - Genset Control
© Woodward Page 83/174
Breaker Monitoring
Upon CLOSING - If "GCB monitoring" (Parameter 157) and/or "MCB monitoring" (Parameter 158) have been
configured "ON", GCB and/or MCB monitoring is performed (exception: the breaker logic is configured "EX-
TERNAL" (Parameter 126). If the breaker cannot be closed after five attempts, a class F1 alarm is issued. If a re-
lay h
as been assigned relay manager functions 74 or 75, it will be energized.
Upon OPENING - When opening a circuit breaker an open pulse is issued. If a reply is detected 2 seconds after
the open pulse was issued that the MCB or GCB has not opened, an class F1 alarm message is issued. If a relay
has been assigned relay manager functions 76 or 77, it will be energized:
Parameter 157
Supervision GCB
ON
GCB monitoring ON/OFF
ON ................ Monitoring of the GCB is performed except when the breaker logic
is configured as "EXTERNAL". If the breaker cannot be closed after
five attempts, an alarm message is issued. The relay assigned relay
manager function 75 is energized. Following the issuing of the alarm
message, further attempts are made to close the GCB. If load sharing
has been enabled (Parameter 103), the closing command to the
breaker is cancelled if an alarm
is issued so that another control may
close its breaker. If a "Reply: GCB is open" message is not detected
2 seconds after a "Command: open GCB" pulse is issued, an alarm
message is issued. The relay assigned relay manager function 77 is
energized.
Issuing of class F1 alarm
OFF .............. No GCB monitoring is performed.
Parameter 158
Supervision MCB
ON
MCB monitoring ON/OFF
ON ................ Monitoring of the MCB is performed except when the breaker logic
is configured as "EXTERNAL". If the breaker cannot be closed after
five attempts, an alarm message is issued. The relay assigned relay
manager function 74 is energized. Following the issuing of the alarm
message, further attempts are made to close the MCB. If load sharing
has been enabled (Parameter 103) the closing command to the break-
er is cancelled if an alarm
is issued so that another control may close
its breaker. If a "Reply: MCB is open" message is not detected
2 seconds after a "Command: open MCB" pulse is issued, an alarm
message is issued. The relay assigned relay manager function 76 is
energized.
Issuing of class F1 alarm
OFF .............. No MCB monitoring is performed.