Connection Of The Power Stage To The Supply; Electrical Connections To The Pqf-Manager User Interface - ABB PQFS Installation, Operation And Maintenance Instructions

Unit 1
CT terminal X21
1
CT in
phase 1
Note that the overall burden requirement for a complete filter system is 5 VA. To this
value has to be added the burden requirement of the interconnection cables to obtain the
total burden requirement of the CT's to be used.
6.11.4

Connection of the power stage to the supply

As a final step in the interconnection process, the power stage of the new unit has to be
connected to the supply.
The same connection approach as used for the other filter units must be adopted. More
information on how to connect a PQFS filter unit to the power supply can be found in
Section 6.8.
WARNING: Make sure that the phase rotation of the power cable connection is
clockwise at the filter terminals and that the L1, L2 and L3 terminal in each filter
unit is connected to the same phase for all units. Failure to do so may lead to the
filter being damaged upon startup.
WARNING: Once a new filter unit has been added to a filter system, this unit has to
be given a unique address (through DIP switch setting on its control board). In
addition, the filter unit has to be recommissioned.
If more than one unit is added, it is recommended to first finish the hardware
modifications and then set up the controller accordingly. More information on how to
change the filter controller unit settings can be found in
After making and verification of all the electrical connections:

6.12 Electrical connections to the PQF-Manager user interface

The PQF-Manager is the user interface between the outside world and the filter
controller. It is mounted on the filter cover panel. Depending on the user requirements,
54 Electrical design and installation ç Manual Power Quality Filter PQFS
Unit 2
CT terminal X21
2 1
Figure 47: Principle of the CT interconnection circuit for multi-unit filters.
· Set a unique address on each filter unit control board
· Close the auxiliary fuse box of the filter units
· Restore the top cover(s) of the filter units
Unit 3
CT terminal X21
2
1 2
Unit 4
CT terminal X21
1
Section 7.7.2.2 and Section
2
8.5.