ComAp IS-NTC-BB Installation Guide

IGS-NT Installation Guide
72
A) B)
L1
L2
L3
N
N L3L2L1
MAINS
N L3L2L1
BUS
L1
L2
L3
N L3L2L1
MAINS
N L3L2L1
BUS
T1
T
2
0V
L1
L2
L3
VOLTAGE TERMINALS
0V
100V
100V
MAINS/BUS
GENERATOR
L1
L3
L2
Principle of two transformers measuring
- typical wiring for high voltage application
spare of one transformer.
CURRENT MEASUREMENT WIRING
A) B)
K
L
k
l
K
L
k
l
K
L
k
l
I1k I1l I2k I2l I3k I3l
K
L
k
l
K
L
k
l
I1k I1l I2k I2l I3k I3l
CAUTION!
Check measurement connections carefully! Failure is possible if phases are connected in
wrong order (WrongPhSequence detected by the controller) but this is not detected if the
phases are just rotated (i.e. instead of phase sequence L1, L2, L3, phase sequence is e.g.
L2, L3, L1.

ComAp IS-NTC-BB Specifications

General

Brand	ComAp
Model	IS-NTC-BB
Category	Controller
Language	English