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Manual 37128A GCP-20 Series - Genset Control

• open GCB/MCB: 9 Opening pulse GCB/MCB enabled; 10 Inherent delay; 11 Reply GCB/MCB; 12 Time

delay (GCB: 2 s; MCB: 0.8 s); 13 Opening pulse disabled.

• Beaker logic: 'Constant'

'Constant' 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 108

GCB closeing

relay-----------

Signal logic for the GCB constant/impulse

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 109

GCB open relay

----------------

Opening the GCB (terminal 41/42) NO-contact/NC-contact

NO-contact.. If the GCB is to be opened, the relay "Command: open GCB" (termi-

nal 41/42) remains energized. Following the "Reply: GCB is open"

the relay de-energizes.

NC-contact . If the GCB is to be opened, the relay "Command: open GCB" (termi-

nal 41/42) de-energizes. Following the "Reply: GCB is open" the re-

lay energizes again.

Woodward GCP-20 Series User Manual

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