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6
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2
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3
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C
C
a
a
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s
e
e
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3
:
:
g
g
The active filter is required to filter the loads of side A and side B but the
transformer busbar not being accessible, the CT' s cannot be installed in
central position.
LOADS
(Side A)
Figure 6.4. Transformer busbar with no access: single -line diagram
For this configuration, three CT' s (one per phase) have to be installed on side
A et on side B (in total, 6 CT' s). Those CT' s will then feed 3 summation CT' s
(one per phase) that are connected to the active filter. This CT topology is
represented in figure 6.5.
l
l
o
o
b
b
a
a
l
l
c
c
o
o
m
m
p
p
e
e
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n
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s
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t
t
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i
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o
n
n
LOADS
(Side B)
Asea Brown Boveri Jumet S.A.
PQFA Instructions Manual
–
–
t
t
r
r
a
a
n
n
s
s
f
f
o
o
r
r
m
m
e
e
r
r
b
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u
u
s
s
b
b
PQF
a
a
r
r
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n
o
o
t
t
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38
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Table of Contents
Troubleshooting
