ComAp InteliMains NT IM-NT-BB - Page 101

InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf, ©ComAp – April 2015
101
Rising edge on this input resets the controller to a lower stage, but only if the load is under the Ld
recon level for Ld recon delay at that moment.
Depending on Load shedding:Ld shed active setting load shedding is active never (DISABLE), during
island operation (ISLAND ONLY), during island operation with special function when transition to
island operation occurs (ISL + TRIP PARAL) or all the time (ALL THE TIME)
EXAMPLE:
When Ld shed active = ISL + TRIP PARAL, all load shed outputs are activated (closed) to trip the
unessential load when gen-set group goes to island:
d) Immediately when MGCB closes after mains fail and gen-set group is instructed to start in
AUT mode (MGCB application only).
e) After EmergStart del elapses when mains fail and gen-set group is instructed to start in AUT
mode (MCB application only).
f) Immediately when MGCB is closed in MAN mode by button (transit to island from parallel
operation).
NOTE:
If no Load Shedding outputs are configured, there is no record to history and no screen timer
indication of the activity of this function.
Ld recon delay
Ld recon delay
Ld recon delay
BO LdShed stage 1
BO LdShed stage 2
BO LdShed stage 3
Ld recon level
Mains or Bus
frequency
Time
Ld shed delay
Ld shed delay
Ld shed delay
BO LdShed stage 1
BO LdShed stage 2
BO LdShed stage 3
Ld shed level
Time
Mains or Bus
frequency
Ld recon delay
Ld recon delay
Ld recon delay
BO LdShed stage 1
BO LdShed stage 2
BO LdShed stage 3
Ld recon level
Mains or Bus
frequency
Time
BI ManualLdRecon
Figure: Examples of load shedding and load reconnection (load shed, load recon, manual load recon) based on
frequency