ABB PQFS Installation, Operation And Maintenance Instructions page 15

Item User connections
1 CT connections
Power cable connection to the supply (including
2
neutral connection if 4-wire operation is desired)
3 Programmable digital outputs (warnings...)
Remote control contact connection or/and local
4
on/off buttons or/and main/auxiliary settings control
PQ-link (USB-Ethernet) – Modbus RTU – Modbus TCP
5
communication connection
Earth connections from the enclosure to installation
6
earth
Mandatory connections are connections that must be present to make the filter
operational. Connections that are not mandatory can be made to enhance the filter's
basic functionality. For more information on cabling the user connections, please refer
to Chapter 6.
Figure 9 shows a typical PQFS master filter panel.
Figure 9: Example of a typical PQFS master filter panel
The input/output connections and protection description is given in
Item Input/output connections
1 CT connection terminals
2 Main power connection
3 Auxiliary fuse protection
PQF-Manager user interface with connection terminals for user I/O (e.g. alarm
4
contact) and communication interfaces.
5 Neutral connection
Table 3: User connections for PQFS
3
4 5
2
Table 4: Input/Output connections
Manual Power Quality Filter PQFS  Hardware description 15
Connection requirement
Mandatory
Mandatory
Not mandatory
Not mandatory
Not mandatory
Mandatory
1
Table 4.