Manual 37128A GCP-20 Series - Genset Control
© Woodward Page 101/190
Overview [GCP-21]
STOP TEST MANUAL AUTOMATIC
EXTERNAL: Breaker logic "External"
The GCB is never synchronized in this operation mode. Decoupling from the mains when in a mains parallel operation is car-
ried out via the GCB in the event of mains faults. The breaker will not automatically close in emergency power operations.
The GCB is ope-
ned.
The GCB is not operated.
Exception:
The breaker is opened
for decoupling from the mains.
The GCB can be manually
opened and closed without syn-
chronization. The breaker is
opened for decoupling from the
mains.
The GCB is opened for stopping
or for decoupling from the mains,
but is not closed in the event of
an add-on request.
Parameter 105
St. with no GCB
at ter. 5 OFF
Perform engine start without closing the GCB ON/OFF
ON................ If the terminal 5 is energized, the engine starts. No synchronization is
performed and the GCB is not closed (no switching to dead busbar).
The GCB is closed only if an emergency power operation is enabled.
After the return of the mains, the load is transferred to the mains ac-
cording to the configured breaker logic.
OFF.............. The function is disabled. An engine start without closing the GCB
cannot be performed by energizing terminal 5.
Start/Stop Ramp, Open GCB with F2 Alarm
Parameter 106
Add-on/off ramp
max.time 000s
Start/stop ramp 0 to 999 s
This time can be used to influence two functions:
Stop: The maximum amount of time generator will shed load is set here. If the gen-
erator load does not drop below 3 % of the generator rated power (
Parameter 17)
within this time, the GCB is opened.
Start with soft loading: If the mains interchange (import/export) real power value
does not reach 0 kW in breaker logic "INTERCHANGE" within the time configured
here; a class F1 alarm and an alarm message are issued. At the same time, the relay
manager relay, which is programmed with relay manager function 78 (Appendix B)
is enabled and the MCB is prevented from opening.
PARALLEL: Breaker logic "Mains parallel"
This operation mode may be used both in the case of an isolated system, an isolated parallel system, and a system that is op-
erated in mains parallel.
The GCB is
opened.
The GCB is not operated.
Exception:
Load test by actuating
the "GCB ON" push-button.
Termination of the load test with
the "GCB OFF" push-button.
Emergency power:
The GCB is
opened for decoupling from the
mains.
Mains parallel operation can be
performed via the "GCB ON"
push-button.
The GCB is synchronized via an
add-on request and mains parallel
operation is performed. When a
shed-off request is issued, the
generator sheds load, the GCB is
opened, and the engine is shut
down following the configured
cool down period.
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