Manual 37365A GCP-30 Series Packages - Genset Control
Page 84/179 © Woodward
Parameter 114
GCB close.relay
----------------
Signal logic for the GCB Impulse/Constant
Constant ...... The "Command: close GCB" relay can be utilized as part of the hold-
ing circuit of the breaker. The "Command: close GCB" relay remains
energized after the connect impulse has been issued and the circuit
breaker closed reply has been received provided the following condi-
tions are met:
• The "Reply: GCB is open" discrete input (terminal 4) is de-
energized when the GCB is closed
• The phase angle between generator voltage and busbar voltage
does not exceed +/-14°.
• The "Command: close GCB" relay de-energizes if the GCB must
be opened
Impulse ........ The "Command: close GCB" relay issues a momentary pulse. An ex-
ternal holding circuit keeps the GCB closed. The "Reply: GCB is
open" discrete input (terminal 4) is de-energized when the GCB is
closed to signal that the GCB is closed.
The "Command: open GCB" relay (terminals 41/42) is energized to open the GCB
regardless of how the breaker closing logic is configured.
Open/Close GCB
Parameter 115
GCB open relay
----------------
Opening the GCB (terminal 41/42) NO-contact/NC-contact
NC-contact... The "Command: open GCB" relay (terminals 41/42) energizes when
the GCB is to be opened. Following the "Reply: GCB is open" the re-
lay de-energizes.
NO-contact . The "Command: open GCB" relay (terminals 41/42) de-energizes
when the GCB is to be opened. Following the "Reply: GCB is open"
the relay energizes again.
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