Manual 37365A GCP-30 Series Packages - Genset Control
© Woodward Page 73/179
Open Breaker
Open GCB
The GCB will be opened though one of two methods that is dependent upon how the breaker closure signal is
configured. If the breaker closure signal is configured as a "continuous pulse" (Parameter 115), the "Command:
GCB clo
se" relay output will be de-energized. If the breaker closure signal is configured as a "momentary pulse"
(Parameter 115), the GCB will open when the "Command: GCB open" relay is energized. The GCB will be
opened under t
he following circumstances:
• If a mains failure is detected and the mains decoupling is configured to occur at the GCB (Parameter 132 or
Parameter 133 depending on control unit)
•
In the STOP operation mode
• If a F2 or F3 class alarm is detected
• Upon pressing the "GCB OFF" or [GCP-32] "MCB ON" push-button (dependent upon the configured break-
er logic) in the MANUAL operation mode
• Upon pressing the "STOP" push-button in the MANUAL operation mode
• Upon pressing the "GCB OFF" or [GCP-32] "MCB ON" push-button (dependent upon the configured break-
er logic) in the LOAD TEST operation mode
• In the event of an automatic shutdown in the AUTOMATIC operation mode
• [GCP-32] After the MCB has closed when the breaker logic is configured as "CLOSED TRANSIT." (make-
before-break/overlap synchronization)
• [GCP-32] Prior to closing the MCB to the dead busbar when the breaker logic is configured as "OPEN
TRANSIT." (break-before-make/changeover)
• In a critical mode/sprinkler operation, provided that an emergency power operation is not enabled
• [GCP-32] Following the load transfer from the generator(s) to the mains so that a zero power transfer occurs
at the GCB when the breaker logic is configured for "INTERCHANGE" (mains interchange (import/export)
real power control)
Open MCB [GCP-32]
The MCB will be opened when the "Command: GCB open" relay is energized (configuration of "continuous
pulse" is not possible for the MCB). The MCB will be opened under the following circumstances:
• If a mains fault is detected and the mains decoupling is configured to EXT (Parameter 133)
•
If emergency power (AMF) is enabled (mains failure)
• After the GCB has closed when the breaker logic is configured as "CLOSED TRANSIT." (make-before-
break/overlap synchronization)
• Before the GCB is closed to the dead busbar when the breaker logic is configured as "OPEN TRANSIT."
(break-before-make/changeover)
• Upon pressing the "MCB OFF" or "GCB ON" push-button (dependent upon the configured breaker logic) in
the MANUAL operation mode
• Upon pressing the "MCB OFF" or "GCB ON" push-button (dependent upon the configured breaker logic) in
the LOAD TEST operation mode
• Following the load transfer from the mains to the generator(s) so that a zero power transfer occurs at the
MCB when the breaker logic is configured for "INTERCHANGE" (mains interchange (import/export) real
power control)
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