InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf,
©ComAp – April 2015
184
voltage disappears.
In MGCB application - if the controller is switched to
OFF mode while the gen-sets are running and there is
voltage on the bus, MGCB is opened and after AMF
settings:FwRet break MCB is closed (if there is Mains
voltage).
Binary output
MAN
It is possible to close/open breakers manually under
supervision of IM-
NT controller which doesn’t allow to
close simultaneously breakers without synchronizing
(e.g. MCB and MGCB).
If the Mains fails, controller opens MCB if
is set to MAINSFAIL. After the Mains returns, MCB
stays opened. Otherwise MCB is controlled manually by
pressing MCB ON/OFF button or closing MCBButton
binary input.
In MGCB application
– if the Mains fails and group of
gen-sets is started and there is voltage on the bus, then
MGCB can be closed anytime by pressing MGCB
ON/OFF button.
Pressing of Start/Stop buttons closes/opens binary
output
, i.e. cause start/stop of the gen-set
group.
AUT
Controller performs automatically sequences after Mains failure,
closing/opening MCB and MGCB, Peak shaving function,
closing of Sys start/stop binary output.
MCB is opened according to setpoint
after Mains failure or after the gen-sets are running.
MGCB is closed after the start of gen-set group as soon
as an appropriate load reserve is achieved (
binary output closed). If Mains fails and MCB is
opened then MGCB stays closed unless voltage on the
bus goes out of the limits.
Controller reacts on binary input
– if this
input is closed, controller activates binary output
in order to start gen-set group. In MGCB
application MGCB can be closed before the output
activation (see also setpoint
).
TEST
MCB application
Test on load - automatic start of the gen-sets (activation
of binary output Sys start/stop), load takeover and
opening of MCB is performed. If the Mains fails during
test, load is transferred to the gen-sets.
MGCB application
Engine Start Only - start of the gen/sets and their
synchronization on generator bus is performed. After
pressing MGCB button, it is synchronized and load is
