Manual 37128A GCP-20 Series - Genset Control
© Woodward Page 39/190
Start Procedure
Explanation by means of entered data
Freq. low before start (ON/OFF) ON
Action time for freq. low (0 to 999 s) t
VG
= 0 s
Preglow time (0 to 99 s) t
VG
= 3 s
Starter time (0 to 99 s) t
EZ
= 5 s
Start pause time (0 to 99 s) t
SPZ
= 10 s
Function
If the unit is equipped with a three-position frequency controller, the relay "Freq. low before
start" is output for the time "Action time for freq. low" prior to the starting process. Then the
relay "Preheating" will be set for the period of the preheating time. Following preheating, the
fuel solenoid is first set, and then the starter. When the adjustable firing speed is exceeded,
the starter is disengaged again, and the fuel solenoid is held via the firing speed. After reach-
ing "starting frequency f-controller" of the speed governor and following the time lag, the
speed governor is activated.
Stop Procedure
Coasting time (0 to 999 s) t
N
= 3 s -> cool down time
Function
By resetting the operation bit, the power is reduced ( provided that the active load controller
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 fuel sole-
noid 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 seconds. If the motor cannot be stopped by the
fuel solenoid, the "stop fail" alarm message appears after 30 s, a class 3 alarm is output.
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