Woodward GCP-30 Series Configuration

Manual 37278B GCP-30 Series - Genset Control
Page 100/174 © Woodward
Mains Frequency Monitoring
Monitoring the mains frequency is absolutely vital if a generator is operated in conjunction with the infinite grid.
In the event of mains failure (e.g. utility power outage) the generator that is operating in parallel with the utility
must be automatically disconnected from the mains. Decoupling from the mains only occurs when both power
circuit breakers (MCB and GCB) are closed.
The limit values configured below are utilized for the assessment emergency power operations if the following
parameters are enabled. The parameters below define if the mains are or aren’t present. The breaker opening
times do not affect these parameters.
Function: "Mains frequency not within the permissible range" - The mains frequency exceeds the limit values
configured for overfrequency or underfrequency. The power circuit breaker that disconnects from the mains is
immediately opened. The prerequisite of mains frequency monitoring is that the generator is operating in mains
parallel (the MCB and GCB are both closed).
Parameter 206
Mains frequency
monitoring ON
Mains frequency monitoring ON/OFF
ON ................ Monitoring of the mains frequency will be performed. The subse-
quent parameters of this function are displayed.
OFF .............. Monitoring is disabled, and the subsequent screens of this function
are not displayed.
Parameter 207
Mains overfreq.
f > 000.0%
Mains overfrequency threshold value 80.0 to 140.0 %
L This value refers to the parameter "Rated freq. in system" (Parameter 11).
If this threshold value has been exceeded for at least the delay time (Para-
m
eter 208), the following alarm class is issued. Depending on the configured mains
decoupling procedure, the GCB, MCB, or an external CB will be opened.
Issuing of class F0 alarm
Parameter 208
Mains overfreq.
delay 0.00s
Mains overfrequency delay 0.02 to 9.98 s
For the control unit to recognize a mains overfrequency fault condition, the thre-
shold value configured in Parameter 207 must be exceeded without interruption for
t
his period of time.
Parameter 209
Mains underfreq.
f < 000.0%
Mains underfrequency threshold value 80.0 to 140.0 %
L This value refers to the parameter "Rated freq. in system" (Parameter 11).
If the current value has been fallen below this threshold value for at least the delay
time (Parameter 210), the following alarm class is issued. Depending on the confi-
g
ured mains decoupling procedure, the GCB, MCB, or an external CB will be
opened.
Issuing of class F0 alarm
Parameter 210
Mains underfreq.
delay 0.00s
Mains underfrequency delay 0.02 to 9.98 s
For the control unit to recognize a mains underfrequency fault condition, the thre-
shold value configured in Parameter 209 must be exceeded without interruption for
t
his period of time.

Woodward GCP-30 Series Specifications

General

Brand	Woodward
Model	GCP-30 Series
Category	Controller
Language	English