ABB PQFA, Instruction Manual

Page: 37 / 98

PQFA Instructions Manual
Asea Brown Boveri Jumet S.A.
37
The connection of the CT’s to the active filter must be as represented herafter:
L1
L2
L3
Load side Supply side
K L
k l
K L
k l
K L
k l
PQF
X5.2
X5.3
X5.4
X5.5
X5.6
X5.1
L1 L2 L3
Figure 6.2. CT’s connection to the active filter.
6
6
.
.
4
4
.
.
2
2
.
.
2
2
.
.
C
C
a
a
s
s
e
e
2
2
:
:
I
I
n
n
d
d
i
i
v
v
i
i
d
d
u
u
a
a
l
l
c
c
o
o
m
m
p
p
e
e
n
n
s
s
a
a
t
t
i
i
o
o
n
n
–
–
o
o
n
n
e
e
f
f
e
e
e
e
d
d
i
i
n
n
g
g
t
t
r
r
a
a
n
n
s
s
f
f
o
o
r
r
m
m
e
e
r
r
Instead of installing one active filter in central position, it also possible to
connect the active filter and its CT’s so that it compensates one particular load
only.
In the example hereafter, the active filter PQF is connected to compensate
Load 1 only. It does not see load 2.
Figure 6.3. Individual compensation – one feeding transformer
The connection of the 3 CT’s to the active filter is described in 6.4.1.
LOAD 2
LOAD 1 PQF
K = P1, L = P2, k = S1, l = S2