Woodward GCP-20 Series User Manual

Manual 37128A GCP-20 Series - Genset Control
Page 46/190 © Woodward
Power Circuit Breaker Control
The closing and opening operations of the generator power circuit breaker (GCB) and the mains power circuit
breaker (MCB) are described in the following diagram. The pulses are switched over in the mask described be-
low, with the signal sequence being affected as indicated (the control of the mains circuit breaker cannot be ef-
fected by means of a continuous impulse). If the "Automatic switch release" screen is set to "ON", an open pulse
is output prior to each close pulse. The "MCB release" inhibits the switching-on of the mains circuit breaker. A
closed mains circuit breaker will not be opened.
8
Connection time
21 3
Release
MCB
5
4
6
7
Disconnection impulse
'Command:
GCB open' (41/42)
MCB open' (39/40)
'Reply:
GCB is open' (4/7)
MCB is open' (54/7)
Connection impulse
'Command: MCB
close' (16/17)
Time/s
11
10
9
12
Time/s
2 s
13
Time/s
Time/s
4
Constant pulse
'Command:
GCB close' (14/15)
9
Time/s
Figure 7-3: CB control
NOTE
Refer to Parameter 108 for more information about the function of the GCB closing relay.

Woodward GCP-20 Series Specifications

General

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