InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf, ©ComAp – April 2015
11.2.8.6 Setpoint: BreakerOverlap
When limited time of running in parallel with mains is required,
BreakerOverlap defines max time of running in parallel with mains. During
this time soft transfer of load is activated. Used in AUT and TEST modes.
This setpoint is valid during transfer of load from gen-set to the Mains and
also in TEST mode. When entering the TestOnLoad the gen-sets remain in
parallel until imported power from Mains goes under 5% of NominMainsImp
without any timeout, if the Import/Export is not measured (i.e. I/E-Pm meas is
set to NONE), the system remains in parallel operation exactly for
BreakerOverlap. When returning from the TestOnLoad, the system remains
in parallel operation until the gen-sets are unloaded to MGCB open lev or at
maximum until BreakerOverlap elapses.
11.2.8.7 Setpoint: RetFromIsland
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). In case that the gensets fail to
supply the load, IM-NT automatically transfers load to the
Mains.
Load is automatically transferred in AUT mode after mains
is OK again.
NOTE:
Select RetFromIsland = MANUAL when it is important at what time the load
is transferred back to the mains. Setting to MANUAL might be important only
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