Manual 37365A GCP-30 Series Packages - Genset Control
Page 78/179 © Woodward
Overview GCP-32
STOP TEST MANUAL AUTOMATIC
Breaker logic: EXTERNAL (External breaker control)
The MCB and the GCB are primarily operated by an external control such as a PLC. The breakers may be operated through
the GCP only if the MANUAL operation mode has been enabled when this breaker logic is used. In a mains parallel opera-
tion, decoupling from the mains is carried out via the MCB or the GCB in the event of a mains failure. The GCP will not au-
tomatically close the breakers in an emergency power operation. Emergency power operations are not possible when this cir-
cuit breaker logic is utilized in accordance with European Community Specification DIN VDE 0108.
The GCB is
opened.
The GCB and the MCB are not
operated.
Exception
: The breakers are
opened to decouple from the
mains.
The MCB and the GCB may be
manually opened and closed
without synchronization. The cir-
cuit breakers are opened to de-
couple from the mains.
The GCB is opened if the genset
is stopped or if decoupling from
the mains but will not close if the
engine is started unless given a
close command from an external
controller. The MCB is opened
only if decoupling from the
mains and is never closed unless
given a close command from an
external controller.
Breaker logic: PARALLEL: (Mains parallel operation)
The MCB and GCB are synchronized to permit continuous mains parallel operation in this breaker logic mode.
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"
push-button terminates 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 and a mains paral-
lel operation is performed. When
an add-off request is issued, the
generator sheds load and opens
the GCB and the engine is shut
down following completion of
the configured cool down period.
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 and closed, return-
ing the system to a mains parallel
operation.
Breaker logic: OPEN TRANSIT.: (Open transition / change-over / brake-before-make)
The MCB and GCB are never synchronized in this breaker logic mode.
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
the "MCB ON" push-button ter-
minates 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.
Pressing the "GCB ON" push-
button will open the MCB and
close the GCB. Pressing the
"MCB ON" push-button will
open the GCB and close the
MCB. Pressing the "STOP" push-
button will open the GCB and
shut the engine down.
A generator is started and
brought online through an add-on
command. When an add-off
command is initiated, the load is
returned to the mains. If the bust
bar is de-energized and an add-on
command has not been issued,
the MCB will be closed.
Emergency power:
The emergen-
cy power operation is terminated
after mains voltage is detected
without interruption for the entire
mains settling time. The GCB is
opened and the MCB closed, re-
turning the load back to then
mains.
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