Connection Of The Pqfs To The Network - ABB PQFS Installation, Operation And Maintenance Instructions

Nominal
network voltage
(Vrms)
208 £ Ue £ 415
Remark:
(a)
WARNING: Once the auxiliary fuse box is closed, the DC bus is automatically
charged when the upstream network is live. Therefore, close the auxiliary circuit
only when the upstream power circuit is not live. Failure to adhere to this guideline
may result in injury or death.
6.8

Connection of the PQFS 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. The feeding cables to the filter
must be protected by their own cable and equipment protection device (see
Section
WARNING: The PQF can operate on networks with nominal voltage in the range
208-240 V and 380-415 V. The unit must be configured for the operation range it will
be used on. Follow the guidelines in this section to ensure that the hardware is
configured properly. Failure to do so may lead to filter damage.
For applications where predominantly 3 phase loads are present and where there is
no need for neutral current filtering nor line to neutral balancing, connect the active
filter in 3-Wire mode.
For applications where predominantly single-phase loads are present and where
there is a need for neutral current filtering and/or line to neutral balancing, connect
the active filter in 4-Wire mode.
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.
NOTE: The PQF active filter is not compatible with high impedance devices
installed upstream of the filter in the neutral. The PQF may refuse to start or may
not function correctly when such a device is present. For best PQF performance,
these devices have to be removed or bypassed.
Table 20: Control circuit fuse characteristics for PQFS filters
Control circuit fuse type
French Ferrule 10 X 38 gG/gl
Fuse short circuit current capability
6.7).
Irms fuse
(Arms)
6
Manual Power Quality Filter PQFS ç Electrical design and installation 43
Rated
(a)
Isc fuse (kA) at
Voltage
rated voltage
(Vrms)
~ 120 500