Inteli NT GeCon MINT, SW Version 1.4, ©ComAp – June 2007
IGS-NT-GeCon-MINT-1.4.PDF
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Contr.address only. When lower controller address gen-set is connected to the bus, Neutral
contactor connection changes.
c) Binary output Neutral CB C/O (Neutral contactor) is opened when gen-sets are running in parallel to
the mains (MCB is closed).
Following see a connection example for setting Neutral cont. = EACH
G
GCB
Vg
Ig
Neutral
contactor
IG/IS-NT
G
GCB
Vg
Ig
Neutral
contactor
IG/IS-NT
G
GCB
Vg
Ig
Neutral
contactor
IG/IS-NT
4
Controller
address 2
Controller
address 3
Controller
address 4
NN
N
MCB
G
GCB
Vg
Ig
Neutral
contactor
IG/IS-NT
Controller
address 1
N
4
4
4 4
COMMON: Only one common Neutral contactor and three pole GCB’s are supposed for whole gen-set
group. Neutral N wire is fix connected through the whole gen-set group. Binary outputs Neutral CB C/O for
Neutral contactor control from all controllers are connected in parallel. Neutral contactor feedback is
connected to all controllers as well.
a) When MCB is opened Neutral contactor closes when at least one Generator voltage from the group
(at least one phase) is higher than 75% of Nominal voltage.
b) When MCB is opened Neutral contactor opens when all phases of all Genset voltages are lower than
50% of Nominal voltage.
c) When MCB is closed Neutral contactor opens.
Hint:
Configure Binary output Neutral CB C/O and Binary input Neutral CB fdb Prior to Neutral contactor function
is used.
Neutral contactor fail is detected when no feedback comes within 400ms from the command or when MCB
and Neutral contactor are closed together for more than 400 ms.
When more logical controller groups are present on the CAN bus, the Neutral contactor is selected
independently in each group, i.e. more Neutral contactors are expected even in EACH mode of operation –
one in each group. Of course, every NCB feedback is expected to be connected only within a group that
controls the corresponding NCB.
Following see a connection example for setting Neutral cont. = COMMON
G
GCB
Vg
Ig
IG/IS-NT
G
GCB
Vg
Ig
IG/IS-NT
G
GCB
Vg
Ig
IG/IS-NT
3
Controller
address 2
Controller
address 3
Controller
address 4
MCB
G
GCB
Vg
Ig
Neutral
contactor
IG/IS-NT
Controller
address 1
N
3
3
3
3
NN
close/open
feedback
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