Electrical Interconnection Of Pqfm Cubicles And Ip00 Plates - ABB PQFM Instruction Manual

Feeding
transformer
Filter CTs
PQFx Linear and
non-linear
loads
Passive filter
Figure 52: Connection diagram to be avoided
Feeding
transformer Filter CTs
PQFx
Passive
filter
+ -
Figure 53: CT connection guidelines for the case that a passive filter is installed downstream of
the active filter
Note that under all conditions when a passive filter and an active filter are installed on
the same bus as per the guidelines above, it is not recommended to select on the active
filter the harmonics at or below the tuning frequency of the passive filter. Under these
conditions, the SDP function may stop filtering the affected harmonics temporarily
resulting in a reduced overall filtering performance.

6.11 Electrical interconnection of PQFM cubicles and IP00 plates

This section explains how to electrically interconnect different PQFM cubicles and IP00
plates.
Figure 54 shows schematically which interconnections have to be made between two
filter cubicles or IP00 plates.
Manual Power Quality Filter PQFM ç Electrical design and installation 69