ABB PQFS Installation, Operation And Maintenance Instructions page 16

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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
Figure 13
The input/output connections and protection description is given in
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16 Hardware description ç Manual Power Quality Filter PQFS
Table 3: User connections for PQFS
User connections
CT connections
Power cable connection to the supply
(including neutral connection if 4-wire
operation is desired)
Programmable digital outputs (warnings...)
Remote control contact connection or/and
local on/off buttons or/and
main/auxiliary settings control
Modbus communication connection or serial
communication
Earth connections from the enclosure to
installation earth
5.
shows a typical PQFS master filter panel.
4
Figure 13: Example of a typical PQFS master filter panel
Table 4: Input/Output connections
Input/Output connections
CT connection terminals
Main power connection
Auxiliary fuse protection
PQF-Manager user interface with connection terminals for user I/O
(e.g. alarm contact) and communication interfaces
Neutral connection
3
5
2
1
Connection requirement
Mandatory
Mandatory
Not mandatory
Not mandatory
Not mandatory
Mandatory
Table 4.