IGS-NT Combi, SW Version 3.0, ©ComAp – May 2013
IGS-NT-Combi-3.0 Reference Guide.PDF
This setpoint takes place in following situations:
ï‚· In AUT mode after reverse synchronization if the gen-set will not
continue in parallel operation. The setpoint adjusts the maximum time the
both GCB and MCB breaker are closed together and the gen-set is
beeing unloaded. The actual time can be shorter if the gen-set reaches
the GCB open level earlier. The GCB open del does not take place.
ï‚· During the Test on load procedure, after forward synchronization.
The setpoint adjusts the minimum time the both GCB and MCB breakers
are closed together and the load is beeing transferred from the mains to
the gen-set. The actual time can be longer if the gen-set is not able to
take over the load and fully unload the mains.
Setpoint: RetFromIsland
The setpoint selects the behavior of the controller in the moment the GCB is
closed to a dead bus (i.e. transition to the island operation).
Controller remains in AUT mode and the manual return to Mains
is done via MCB button. "Manual Restore" message is displayed
in alarmlist to notify operator - it will disappear automatically after
MCB close button is pushed (i.e. reverse synchronizing is
started).
NOTE:
This option is intended for applications where the moment of
reverse transfer of the load to the restored mains is to be
controlled manually. Setting to MANUAL might be important only
for applications with break transfers (with synchronizing
disabled).
CAUTION!
If the controller is in MAN mode the MCB is not closed
automatically when the mains is restored even if e.g. the gen-set
has been stopped due to a failure.
The controller remains in AUT or TEST mode and the transfer of
the load back to the mains is initiated automatically with delay
adjusted by the setpoint Mains ret del.
Setpoint: ReturnTo mains
To Next Page
Loading...
Need help?
General
