Connection Of The Pqfm To The Network - ABB PQFM Instruction Manual

The surge arrester circuit is connected directly on the feeding supply (in parallel with the
control circuit protection).
6.8

Connection of the PQFM to the network

WARNING: The PQF has to be installed in parallel with the loads, preferably on a free
feeder. Local regulations and requirements prevail in determining how the equipment
has to be connected to the network. In accordance with good cabling practices, ABB
strongly suggests that the feeding cables to the filter are protected by their own cable
protection device.
NOTE: When installing an active filter in installations containing power factor
correction capacitor banks, it is recommended to use detuned capacitor banks and to
connect the capacitor banks upstream of the filter measurement CTs. More
information on this subject is given in
NOTE: When installing an active filter in parallel with a passive filter, the active filter
must be installed downstream of the passive filter. The harmonics at and below the
tuning frequency of the passive filter should not be selected. More information on this
subject is given in
Three power cables (L1, L2 and L3) have to be connected to each filter busbar system
(in each cubicle). The busbar system is situated at the right hand side of the cubicle,
halfway up. Make sure that the phase rotation is clockwise and that the L1, L2 and L3
terminal in each cubicle is connected to the same phase for all cubicles. Failure to do
so may lead to the filter being damaged upon startup.
On the filter side, the power cables are normally connected to the filter connection
system:
- For CE versions the customer connections are on a busbar system which allows
for bottom cable and top cable entry.
relevant dimensions for the busbar system. From the busbar system the power is
routed to the main contactor or to the optional fuse base.
- For cULus versions the customer connections are directly on the main fuse base.
The maximum cable size that can be connected to the fuse base is 350 kcmil. The
maximum fixation torque is 375
relevant dimensions.
54 Electrical design and installation ç Manual Power Quality Filter PQFM
Section 6.10.9.
In.lb. Figure 32
Section 6.10.7 and Section
Figure 31 shows the terminal layout and the
shows the terminal layout and the
6.10.8.