Connection Of The Pqfs In 3-Wire Mode - ABB PQFS Installation, Operation And Maintenance Instructions

6.8.1

Connection of the PQFS in 3-wire mode

Use the 3-wire connection mode for installations where there is no need for neutral
current filtering nor line to neutral balancing. In this mode, the active filter can
compensate 20 individual harmonic components.
In order to connect the PQFS in 3-wire mode, follow the below guidelines:
1.
2.
3.
4.
5.
6.
Figure 33: Connecting the three power cables and connecting them to the filter reactor terminals
Remarks:
The cable lugs of the feeding cables should comply with:
44 Electrical design and installation ç Manual Power Quality Filter PQFS
Fix the filter mechanically to the wall (Cf.
Ensure that an appropriately selected protecting device is connected upstream and
that the power supply cables are not live
Remove the protective cover present at the bottom right side of the filter (Cf.
32)
Figure 32: Removing the protective cover at the bottom side of the active filter enclosure
Make holes in the protective cover of appropriate section corresponding to the
power cable section used. Also make holes for the earth cable, the CT wire and any
other control wires that may be needed, e.g. for implementing remote control
functionality. When finished, slide the cover over the feeding cables and the earth
cable.
Connect the earth cable (Cf.
Connect the three power cables to the reactor terminals (Cf.
· The left reactor terminal corresponds to phase L1 (R, A)
· The middle reactor terminal corresponds to phase L2 (Y, B)
· The right reactor terminal corresponds to phase L3 (B, C)
· Maximum lug width: in accordance with terminal width
· Minimum lug eye diameter: M8
Section 5.4)
Section 6.5)
Figure
Figure 33)