Woodward GCP-30 Series User Manual

Manual 37365A GCP-30 Series Packages - Genset Control
© Woodward Page 93/179
Emergency Power With Breaker Logic "CLOSED TRANSIT."
Emergency power: After detecting a mains fault, the GCP will wait until the "emergency power start delay"
(Parameter 138) has expired before start
ing an engine. 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 MCB is
opened and t
he GCB is closed to the dead busbar. The generator is now supplying power to the load.
Return of the mains: Following the termination of the mains fault, the GCP will continue the emergency power
operation until the mains settling time has expired (Parameter 194) before synchronization of the MCB is in-
itiated
. After closing the MCB, a power reduction (soft unloading) is carried out provided the real power control-
ler (Parameter 74) is configured as "ON", and the GCB is opened. Aft
er opening the GCB the engine continues
to run for the amount of time configured in "Cool down time" (Parameter 270) and is then shut down. If an en-
g
ine request is present following the expiration of the mains settling time (Parameter 194), the generator will
m
aintain the isolated operation.
If the GCP has initiated the start cycle and the mains are restored, the GCP completes the start cycle but the MCB
is not opened. The engine remains in idle mode during the mains settling time (Parameter 194). The engine re-
m
ains running while the mains settling time expires so the GCB can be closed and the MCB opened immediately
in the event of another mains failure.
Emergency Power With Breaker Logic "INTERCHANGE"
Emergency power: After detecting a mains fault, the GCP will wait until the "emergency power start delay"
(Parameter 138) has expired before start
ing an engine. 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 MCB is
opened and t
he GCB is closed to the dead busbar. The generator is now supplying power to the load.
Return of the mains: Following the termination of the mains fault, the GCP will continue the emergency power
operation until the mains settling time has expired (Parameter 194) before synchronization of the MCB is in-
itiated
. After closing the MCB, a power reduction (soft unloading) is carried out provided the real power control-
ler (Parameter 74) is configured as "ON", and the GCB is opened. Aft
er opening the GCB the engine continues
to run for the amount of time configured in "Cool down time" (Parameter 270) and is then shut down. If an en-
g
ine request is present following the expiration of the mains settling time (Parameter 194), the generator will
m
aintain the isolated operation.
If the GCP has initiated the start cycle and the mains are restored, the GCP completes the start cycle but the MCB
is not opened. The engine remains in idle mode during the mains settling time (Parameter 194). The engine re-
m
ains running while the mains settling time expires so the GCB can be closed and the MCB opened immediately
in the event of another mains failure.
Emergency Power With Breaker Logic "EXTERNAL"
ATTENTION
This breaker logic will not permit emergency power in accordance with DIN VDE 0108!
Emergency power: After detecting a mains fault, the GCP will wait until the "emergency power start delay"
(Parameter 138) has expired before start
ing an engine. 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 MCB is
opened and t
he GCB is closed to the dead busbar. The generator is now supplying power to the load. Further op-
erations of the GCB and the MCB are not operated performed regardless if the mains are restored.

Woodward GCP-30 Series Specifications

General

Brand	Woodward
Model	GCP-30 Series
Category	Controller
Language	English