Functions; Off-Man-Aut-Test Mode - ComAp IG-NT Reference Manual

Functions

OFF-MAN-AUT-TEST mode

OFF mode
Outputs STARTER, GCB CLOSE/OPEN and FUEL SOLENOID are not energized.
Genset cannot be started. If START,STOP,GCB ON/OFF,MCB ON/OFF buttons are pressed the controller
will not respond.
MCB behavior depends on AMF settings: MCB opens on setpoint:
MAINSFAIL: When power-cut comes, MCB opens. After mains returns, MCB closes with MCB close del.
GEN RUNNING: When power-cut comes, MCB stays closed.
When the gen-set is running it is not possible to switch directly to OFF mode. First you have to stop the
engine.
MAN mode
1) START - starts the gen-set.
2) GCB ON/OFF
If generator voltage is out of the limits (adjusted in the set point group Gener protect) controller does
not respond to the GCB ON/OFF
a) controller closes GCB to dead bus.
b) controller starts GCB synchronizing when mains is OK and MCB is closed. Closes the GCB
when synchronized and stays running in parallel. Operational mode in parallel depends on
ProcessControl setting.
c) Unloads gen-set and opens the GCB if gen-set was running in parallel to the mains.
d) Opens GCB immediately if gen-set was running in island operation.
3) MCB ON/OFF
a) controller closes MCB to dead bus (even if the mains voltage is out of limits).
b) controller starts MCB synchronizing when gen-set is running and GCB is closed. Closes the
MCB when synchronized and stays running in parallel. Operational mode in parallel depends on
ProcessControl setting.
c) Unloads gen-set and opens the MCB if gen-set was running in parallel to the mains.
4) STOP
a) When gen-set is running in parallel: transfers load to the mains, opens GCB, goes into cooling
state and stops the engine.
b) When gen-set is running island (MCB is opened): opens GCB, goes into cooling state and stops
the engine.
c) When engine is running unloaded: activates cooling sequence and then stops the engine.
d) During cooling state causes immediate engine stop.
Hint:
The genset is permitted to run unloaded for unlimited time.
Controller does not automatically start the gen-set when power cut comes or REM START/STOP is closed.
Controller does not automatically change the MCB state depending on mains changes.
Load control in parallel depends on ProcessControl: Load ctrl PtM setpoint.
SEM
In SEM mode, pressing of START or STOP buttons performs a predefined sequence:
1) START – starts the engine, synchronizes and runs in parallel.
2) STOP – softly unloads the gen-set, opens GCB, provides cooldown and stops the engine.
3) In case of mains failure and Process control: MFStart enable set to YES, allows automatic start/stop
same as in AUT mode.
Inteli NT SPtM, SW Version 2.4, ©ComAp –December 2009
IGS-NT-SPtM-2.4-Reference Guide.PDF
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