ABB PQFS Installation, Operation And Maintenance Instructions page 113

WARNING: The PQFS is able to operate on networks where the supply
voltage is up to 10% higher (inclusive of harmonics but not transients) or
lower than the voltage range it is set up for. Since operation at the upper
limits of voltage and temperature may reduce its life expectancy, the PQFS
should not be connected to systems for which it is known that the
overvoltage will be sustained indefinitely.
· The voltage phase rotation at the active filter incoming power supply terminals
must be clockwise (L1 (R,U) -> L2 (Y,V) -> L3 (B,W) -> L1 (R,U)).
WARNING: Applying voltage to the filter to check the phase rotation may
only be done after ensuring that the network voltage level is acceptable for
the filter operation and after it has been found that the filter is not
mechanically nor electrically damaged.
When power is supplied to the active filter terminals, the unit will automatically do
a phase rotation check in the master unit. If the phase rotation is wrong the filter
will show the message 'ACK. FAULT' on the PQF-Manager 'Welcome' screen.
The filter will refuse to start and a message indicating wrong phase rotation will
be stored in the filter event log (Cf.
WARNING: For safety reasons, when using a phase rotation meter, the
phase rotation must be measured at the upstream protection level and not
in the filter panel itself.
When checking the phase rotation with a phase rotation meter, ensure that the
auxiliary fuse box is open during the measurement process.
WARNING: In a multi-unit filter arrangement, care must be taken to connect
all units to the power supply in an identical way as the master unit
(individual phases and phase rotation). Otherwise, the equipment may be
damaged upon energization and/or may function incorrectly.
Before going to the next step, it is recommended at this stage to first install the other I/O
cabling if required.
Once all the hardware has been cabled,
· Close the auxiliary circuit fuse box
· Refit the filter protective cover including PQF-Manager and its connections
· Close the filter upstream protection
When the power is applied to the active filter:
- The active filter fans will start running
- The DC capacitors will be charged
- The PQF-Manager will initialize and show the 'Welcome' screen (Cf.
or will show a screen indicating that it is in slave mode
If the voltage level or phase rotation is incorrect, the installation should be corrected
before applying power to the filter to avoid potential filter malfunctioning and/or damage.
Section 7.8.3)
Manual Power Quality Filter PQFS ç Commissioning instructions 113
Figure 60),