Manual 37365A GCP-30 Series Packages - Genset Control
Page 94/179 © Woodward
Emergency power With MCB Malfunction
MCB malfunction: If the MCB opens without an open command from the GCP while in the AUTOMATIC
mode and the control is configured for emergency power standby, the GCP will attempt to reclose the breaker. If
the MCB cannot be reclosed due to an MCB failure and "Emergency power" (Parameter 136 ) and "Supervision
MCB" (Parameter 131 ) are configured "ON", the engine is st
arted and the alarm message "MCB malfunction" is
displayed. Once the engine has started and the monitored generator voltage and frequency have exceeded the
dead bus start limits (Parameter 126 and Parameter 127), the GCB is closed to the dead busbar. After the condi-
t
ion that caused the MCB fault has been corrected and the "MCB malfunction" alarm has been acknowledged,
the emergency power operation is terminated and the load is transferred to the mains in the manner prescribe by
the configured circuit breaker logic detailed above.
Emergency Power Operation; Parameters
Parameter 137
Emergency power
ON
Emergency power ON/OFF
ON ................ If the control is in AUTOMATIC or TEST mode and a mains failure
occurs, the engine is started and an emergency power operation is
performed. The subsequent parameters of this function are displayed.
Emergency power operations may also be initiated by the detection
of a breaker failure when the MCB is to be closed. In order to enable
this, the Parameter 131 ("Supervision MCB") must be configured to
"ON".
OFF
.............. Emergency power operation is not enabled and the subsequent para-
meters of this function are not displayed.
Parameter 138
Emergency power
start del. 00.0s
Start delay for emergency power 0.5 to 99.9 s
In order to start the engine and to carry out an emergency power operation, the
mains must fail for at least this delay time.
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