Manual 37365A GCP-30 Series Packages - Genset Control
Page 70/179 © Woodward
Synchronization of the MCB [GCP-32]
MCB synchronization will be performed with frequency and voltage correction when the following conditions
have been met:
Automatic mode
• The control has been placed in the AUTOMATIC operation mode
• The circuit breaker logic (Parameter 111) is configured as "PARALLEL" (m
ains parallel operation), "IN-
TERCHANGE" (mains interchange (import/export) real power control), or "CLOSED TRANSIT." (make-
before-break/overlap synchronization)
• An F2 or F3 class alarm has not been detected
• The busbar is energized (the control measures voltage on the bus)
• The mains voltage is present and within the permissible limits
• The engine is running and the generator voltage and frequency are within the permissible limits
• The discrete input "Reply: GCB is open" is not energized (the GCB is closed)
• The discrete input "Enable MCB" is energized
• The rotating field of the generator and the mains voltages are identical and no alarms are displayed
Manual operation
• The control has been placed in the MANUAL operation mode
• The circuit breaker logic (Parameter 111) is configured as "PARALLEL" (m
ains parallel operation), "IN-
TERCHANGE" (mains interchange (import/export) real power control), or "CLOSED TRANSIT." (make-
before-break/overlap synchronization)
• An F2 or F3 class alarm has not been detected
• The busbar is energized (the control measures voltage on the bus)
• The mains voltage is present and within the permissible limits
• The engine is running and the generator voltage and frequency are within the permissible limits
• The discrete input "Reply: GCB is open" is not energized (the GCB is closed)
• The discrete input "Enable MCB" is energized
• The "MCB ON" push-button has been pressed
• Load test: The GCB is opened in accordance with the configured breaker logic (INTERCHANGE, or
CLOSED TRANSIT.) after the load test has been terminated
• The rotating field of the generator and the mains voltages are identical and no alarms are displayed