ComAp InteliMains NT IM-NT-BB - Page 223

InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf, ©ComAp – April 2015
223
EXAMPLE SITUATION
SETPOINT SETTING
RESULTING BEHAVIOUR
Island operation, no
Mains voltage
Not important
MGCB stays closed even if
bus voltage goes out of the
limits
Island operation,
Mains voltage
present, e.g. during
MainsRetDel
Not important
Bus voltage limits are active,
i.e. MGCB opens if bus
voltage goes out of the limits
Reverse
synchronizing, load
jump occurs
DISABLED
Gen-sets go to
over/underfrequency state
and are disconnected from
the bus, InteliMains keeps
synchronizing and at the end
of synchro timeout it opens
MGCB and closes MCB
issuing alarm “Wrn Rsync
timeout“
Reverse
synchronizing, load
jump occurs
ENABLED
After activation of bus
protections InteliMains starts
to count down MainsRetDel
11.2.7.8 Setpoint: Bus V unbal
Group
Bus protect
Range [units]
0 .. 200 [%]
Related FW
standard v3.1.0
Description
This setpoint adjusts threshold for bus voltage unbalance alarm. The voltage
unbalance is calculated as a maximum difference between phase voltages.
This protection is history record type and its delay is set by setpoint Bus
Vunb del.
11.2.7.9 Setpoint: Bus Vunb del
Group
Bus protect
Range [units]
0.0 .. 600.0 [s]
Related FW
standard v3.1.0
Description
This setpoint determines the delay which is used in evaluation of Bus V unbal
protection (threshold for this protection is set by setpoint Bus V unbal).