Woodward GCP-30 Series - Open;Close GCB; Figure 3-7: Breaker Control Logic Continuous

Manual 37278B GCP-30 Series - Genset Control
Page 76/174 © Woodward
• Beaker logic: 'Continuous'
'Command: close
GCB' (14/15)
'Command: close
GCB' (14/15)
4 9
74
Time/s
Time/s
Figure 3-7: Breaker control logic 'Continuous'
'Continuous' logic (GCB only):
1 Enable; 2 Synchronization; 3 Connect time reached:
• close GCB:
4 GCB close continuous pulse enabled; 5 Inherent delay; 6 Reply GCB;
• open GCB:
9 Continuous pulse disabled and GCB open pulse enabled; 10 Switcher time element; 11 Reply
GCB; 12 Opening pulse disabled.
Parameter 129
GCB close.relay
----------------
Signal logic for the GCB Impulse/Constant
Constant ...... The relay "Command: close GCB" can be looped directly into the
self-holding circuit of the breaker. Following the connect impulse has
been issued and the reply of the breaker has been received, the relay
"Command: close GCB" remains energized as long as the following
conditions are fulfilled:
"Reply: GCB is closed" is active.
The angle between generator voltage and busbar voltage is within +/-
14°.
If the breaker must be opened, the relay de-energizes.
Impulse ........ The relay "Command: close GCB" outputs a connect impulse. The
GCB self-holding function must be performed by an external holding
circuit. The reply of the GCB is used to detect the closed breaker.
In both cases, the relay "Command: open GCB" (terminal 41/42) is energized to
open the GCB.
Open/Close GCB
Parameter 130
GCB open relay
----------------
Opening the GCB (terminal 41/42) NO-contact/NC-contact
NC-contact... If the GCB is to be opened, the relay "Command: open GCB" (ter-
minal 41/42) remains energized. Following the "Reply: GCB is open"
the relay de-energizes.
NO-contact . If the GCB is to be opened, the relay "Command: open GCB" (ter-
minal 41/42) de-energizes. Following the "Reply: GCB is open" the
relay energizes again.