Operation Manual 37107F
MFR 3 - Multi Function Relay
© Woodward
Page 37/165
Operating Sequence for the GCB
Figure 4-3 represents the switch behavior for the following settings:
Shutdown: ON
Relay "Command: open GCB", logic: A (operating current; NO)
GCB continuous pulse: OFF
Additional information can be obtained from the descriptions of the configuration screens.
1
3
2
4
6
7
'Command: close
GCB' (14/15)
Time/s
Time/s
Time/s
Time/s
Release
GCB (3/7)
'Command: open
GCB' (41/42)
'Reply: GCB is
open' (4/7)
Connection time GCB
5
Figure 4-3: Activation of the circuit breakers - GCB
ON/OFF switching
p
ulse:
1
Synchronization
2
close GCB:
2
closing pulse for the GCB energized
3
breaker inherent delay
4
closing pulse de-energized
6
open GCB:
5
start of power reduction
6
end of power reduction
6
opening pulse for the GCB energized
7
opening pulse de-energized
Between
5
and
6
the power is reduced. When the power is close to zero, the GCB is opened.