ComAp IGS-NT Series - Voltage Measurement Separation; Mains Power and PF Measuring in IGS (E.g. Sptm Application); Earth Fault Protection (E.g. MINT Application)

IGS-NT Installation Guide
73
8.6.2. Voltage measurement separation
For optional separation of Mains/bus and generator voltage from the controller (e.g. on ships)
use IG-MTU.
8.6.2.1. IG MTU
Connect one or two IG-MTU units to separate generator and Mains/bus voltage from
controller.
Three wire mains
Three wire mains and three wire genset or electric
separation
T1 T3T2
L1
L3
L2
L3
GENERATOR
L1
MAINS / BUS
L2
400V
400V 400V
0V
0V
0V
0V 0V
0V
400V 400V
400V
L1 L3
MAINS / BUS
VOLTAGE
L2
L1
L2
L3
GENERATOR
VOLTAGE
N
IG-MTU
N
N
Ix-NT
T1
T3T2
T1
T3T2
L
1
L
3
L2
L3
GENERATO
R
L1
MAINS / BUS
L2
400V 400V
400V
L1 L3
MAINS / BUS
VOLTAGE
L2
Ix- NT
L1
L2
L3
GENERATO
R
VOLTAGE
N
IG-
MTU
IG
-
MTU
0 V
0 V
0 V
400V
400V 400V
0 V
0 V 0 V
400V
400V 400V
0 V
0 V 0 V
400V
400V 400V
0 V
0 V 0 V
N
8.6.3. Mains power and PF measuring in IGS (e.g. SPtM
application)
G
GENERATOR
I3k I3l
L1
L2
L3
N
K L
k l
I1k I1l
K L
k l
I2k I2l
K L
k l
MAINS
Inl Ink
L K
l k
8.6.4. Earth fault protection (e.g. MINT application)
Earth fault current protection is active only when Process control: IE measurement =
ANALOG INPUT or NONE.
Connect separate current transformer to gen-set neutral. Adjust EarthFltCurrCT in Basic
settings and EarthFaultCurr and EthFltCurr del limits in Generator protection group.