Woodward GCP-20 Series User Manual

Manual 37128A GCP-20 Series - Genset Control
© Woodward Page 41/190
Start Procedure
Explanation by means of entered data
Approach idle gas position (ON/OFF) ON
Firing delay (0 to 99 s) t
ZV
= 3 s
Gas delay (0 to 99 s) t
GV
= 8 s
Engagement time (0 to 99 s) t
EZ
= 5 s
Interval between two start attempts (0 to 99 s) t
SPZ
= 10 s
Function
If the unit is equipped with a three-position frequency controller, a permanent signal (time ad-
justable) is output at the relay output "frequency lower". The starter is then set. Following the
firing delay time and as soon as the genset is rotating at least at the configured "Ignition speed
Starting" the ignition is then switched on. Following the expiry of the gas delay, the gas valve
is then switched on. If the starting attempt is successful, i.e., the firing speed was exceeded,
the starter is disengaged again. The gas valve and the ignition are held via the firing speed.
After reaching the "starting frequency f-controller" and following the time lag, the speed gov-
ernor is then activated.
Starting process
The gas valve is held via the ignition speed. The ignition is held via the minimum speed (at
pickup) or is shut down at < 15 Hz (without pickup).
Stop Procedure
Coasting time (0 to 999 s) t
ZN
= 3 s -> cool down
"Engine stop" 10 s t
MST
= 10 s
"Shutdown alarm" 30 s t
ab
= 30 s
Function
By resetting the starting request the power is reduced (provided that the active power control-
ler is switched on). After opening the generator power circuit breaker, the coasting time is
started, and the motor rotates without load. After terminating the coasting time the gas valve
relay is reset. The motor is stopped. If the firing speed is not reached, motor starting is pre-
vented for a firmly pre-configured time of 10 s seconds. If the motor cannot be stopped, the
"Stop fail" alarm message appears after 30 s, a class 3 alarm is output.
Without pickup: following a negative deviation of the ignition speed the ignition relay re-
mains set for another 5 seconds for the combustion of the remaining gas.

Woodward GCP-20 Series Specifications

General

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