ABB PQFS User Manual

200 Troubleshooting guide  Manual Power Quality Filter PQFS
Fault message Cause What to do
Overcurrent
RMS
The system has detected RMS
overcurrent in the filter.
− Verify that the filter CTs are
properly installed and are
not shorted.
− Verify that the unit current
ratings and order
programmed at the
commissioning stage
corresponds to the rating
and order physically present.
− Verify the filter cooling
system and check the IGBT
temperature using the PQF-
Manager.
− Deactivate harmonic and
reactive power requirements
and see if the problem
persists.
Overcurrent
peak (SW)
The software peak current
protection has been triggered.
− Verify that the filter CTs are
properly installed and are
not shorted.
− Verify that the unit current
ratings and order
programmed at the
commissioning stage
corresponds to the rating
and order physically present.
− Verify the filter cooling
system and check the IGBT
temperature using the PQF-
Manager.
− Deactivate harmonic and
reactive power requirements
and see if the problem
persists.
Overvoltage
RMS
The RMS value of the supply
voltage measured with the AC
voltage measurement board is
higher than the acceptable
maximum value.
− Measure the three line
voltages and check if they
are within limits.
− Measure the line voltages
(e.g. voltmeter) and
compare them with the line
voltages given by the filter
(PQF-Manager or PQ-Link).
− Ensure that the AC voltage is
properly measured.
Preload
problem
The DC capacitors could not
be preloaded at startup. The
voltage increase on the DC
capacitors during the preload
phase is not high enough.
− Measure the three line
voltages and check if they
are within limits.
− Verify the fuses (PF1 and
PF2) and the resistors (R1

ABB PQFS Specifications

General

Brand	ABB
Model	PQFS
Category	Industrial Electrical
Language	English