Woodward GCP-20 Series User Manual

Manual 37128A GCP-20 Series - Genset Control
Page 44/190 © Woodward
MCB Synchronization
The mains power circuit breaker will be synchronized with frequency and voltage correction if the following
conditions are met simultaneously:
Automatic operation
• the "AUTOMATIC" operating mode is selected
• one of the circuit breaker logics "parallel", "interchange" or "closed transition" is acti-
vated while in configuration mode
• no alarm class 2 or 3 alarm is present
• voltage is applied to the busbar
• the mains voltage is applied and within the admissible limits
• in emergency power operation, the "mains settling time" has finished
• the genset is running, and the busbar voltage and frequency are within the range
• the "response: GCB is open" is not present (the GCB is closed)
• the input "release MCB" is set
• [GCP-21/22] If the mains watchdogs are switched off, the mains values apply as follows:
Mains monitor Voltage Frequency
ON Monitor values Monitor values
OFF 85 to 112.5 % 90 to 110 %
Table 7-3: Mains monitors
Manual operation
• "MANUAL" operating mode has been selected
• one of the circuit breaker logics "mains parallel operation", softloading" or "no-break-
transfer" is activated while in configuration mode
• no alarm class 2 or 3 alarm is present
• voltage is applied to the busbar
• mains voltage is applied
• the genset is running, and the generator voltage and frequency are within the preset lim-
its (refer to
Parameter 120 and Parameter 121)
• the "response: GCB is open" is not present (the GCB is closed)
• the input "release MCB" is set
• the button "MCB ON" has been activated
• Load test: with the termination of the load test (circuit breaker logics "softloading" or
"no-break-transfer") the GCB opens

Woodward GCP-20 Series Specifications

General

Brand	Woodward
Model	GCP-20 Series
Category	Control Unit
Language	English