Manual 37365A GCP-30 Series Packages - Genset Control
© Woodward Page 79/179
STOP TEST MANUAL AUTOMATIC
Breaker logic: CLOSED TRANSIT.: (Closed transition / make-before-brake / overlap synchronization)
The MCB and the GCB are synchronized; preventing the busbar from being de-energized while the load is transferred. Im-
mediately after the synchronization of one breaker, the other is opened. Continuous mains parallel operation is not possible.
The GCB is
opened; the MCB
is not operated.
The GCB and the MCB are not
operated.
Exception
: Pressing the "GCB
ON" push-button enables load
tests. Pressing the "GCB OFF" or
"MCB ON" push-button termi-
nates the load test.
Emergency power:
If a mains
failure occurs while in the TEST
mode, the control initiates an
emergency power operation. The
respective breaker enable discrete
inputs must be energized.
Synchronization of either the ge-
nerator or the mains can be in-
itiated by pressing the "GCB
ON" or "MCB ON" push-button.
The GCB is synchronized via an
add-on request. After the GCB
closes the MCB is opened, trans-
ferring the load to the generator.
Following the add-off request be-
ing issued, the MCB is synchro-
nized and closed. The GCB is
opened immediately after the
MCB closure, returning the load
to the mains.
Emergency power:
The emergen-
cy power operation is terminated
after mains voltage is detected
without interruption for the entire
mains settling time. The MCB is
synchronized to the generator and
the MCB is closed. The GCB is
opened immediately after the
MCB closure, returning the load
to the mains.
Breaker logic: INTERCHANGE: (Soft loading / interchange synchronization)
The MCB and the GCB are synchronized; preventing the busbar from being de-energized while the load is transferred. The
operation of a breaker under load is avoided by utilizing the ability to softly transfer the load from one source to the other.
Continuous mains parallel operation is not possible with this breaker logic. Following the add-off request, the MCB synchro-
nizes and closes, the generator soft unloads to the mains and the GCB opens. After the GCB is open the engine is stopped fol-
lowing the expiration of the configured cool down period.
The GCB is
opened; the MCB
is not operated.
The GCB and the MCB are not
operated.
Exception
: Pressing the "GCB
ON" push-button enables load
tests. Pressing the "GCB OFF" or
"MCB ON" push-button termi-
nates the load test.
Emergency power:
If a mains
failure occurs while in the TEST
mode, the control initiates an
emergency power operation. The
respective breaker enable discrete
inputs must be energized.
Synchronization of either the ge-
nerator or the mains can be in-
itiated by pressing the "GCB
ON" or "MCB ON" push-button.
The GCB is synchronized via an
add-on request. The MCB is
opened after the load has been
softly transferred from the mains
to the generator and a "zero"
power condition has been
achieved at the MCB. Following
the add-off request being issued,
the MCB is synchronized to the
generator and the MCB is closed.
The GCB is opened after the load
has been softly transferred to the
mains and a "zero" power condi-
tion has been achieved at the
GCB.
Emergency power:
The emergen-
cy power operation is terminated
after mains voltage is detected
without interruption for the entire
mains settling time. The MCB is
synchronized to the generator and
the MCB is closed. The GCB is
opened after the load has been
softly transferred to the mains
and a "zero" power condition has
been achieved at the GCB.
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