ABB PQFS User Manual

52 Electrical design and installation  Manual Power Quality Filter PQFS
Note that this cable must be able to withstand three times the secondary current rating
of the CTs. Note that this cable must be able to withstand three times the secondary
current rating of the CTs.
L1
L2
L3
Load side
Supply side
K
L
K
L
K
L
PQF
L1
L2
L3
To X21.2
To X21.5
To X21.8
K = P1, L = P2, k = S1, l = S2
N
N
X21.1
X21.2
X21.3
X21.4
X21.5
X21.6
X21.7
X21.8
X21.9
Figure 35: Four wires CT wiring approach that may be used with a single unit
PQFS active filter
In case a filter system consists of more than one unit, all units have to be supplied with
the CT measurement information. This is done by cabling the CTs in a daisy chain fashion
between the different units. This is illustrated in Section 6.11.3.
6.11 Electrical interconnection of PQFS enclosures
This section explains how to electrically interconnect different PQFS enclosures.
Figure 36 shows schematically which interconnections have to be made between two
filter enclosures.

ABB PQFS Specifications

General

Brand	ABB
Model	PQFS
Category	Industrial Electrical
Language	English