ABB PQFS Installation, Operation And Maintenance Instructions page 156

Table 57: Fault messages reported by the DSP controller of the filter and troubleshooting tips
Fault message
Bad parameters
Bad message sequence
Bad CT connection
DC overvoltage (SW)
DC overvoltage (HW)
156 Troubleshooting guide ç Manual Power Quality Filter PQFS
Cause
The filter parameters
entered by the
commissioning engineer
are not consistent with the
filter configuration reported
by the controller.
Internal system error
The automatic CT detection
procedure has encountered a
problem during the CT
identification process.
The DC software overvoltage
protection has been triggered.
The DC hardware overvoltage
protection has been triggered.
What to do
Check the commissioning parameters and
correct where necessary. (Cf.
Contact your ABB service provider. Most
likely the controller software has to be
upgraded or the main controller card
replaced.
– Check that the CTs are installed on
the supply side of the filter.
– Check that the CTs are not
shorted.
– Check that the overall CT ratio
(including summing CTs) is smaller
than 20000/5.
– Set up the CTs manually (Cf.
Section 8.6)
– Check the connection between the
DC voltage measurement
connector (P6-5 and P6-7) and the
DC capacitors.
– Check flat cable connections
between the Control Board and the
IGBT module.
– Analyze network voltage stability
(amplitude and phase).
– Disable reactive power
compensation and balancing
options to see if the problem
persists.
– Deselect the high frequency
components to free DC bus
resources and to see if the
problem persists.
– Check the connection between the
DC voltage measurement
connectors (P6-5 and P6-7) and
the DC capacitors.
– Check flat cable connections
between the Control Board and the
IGBT module.
– Analyze network voltage stability
(amplitude and phase).
– Disable reactive power
compensation and balancing
options to see if the problem
persists.
– Deselect the high frequency
components to free DC bus
resources and to see if the
problem persists.
Chapter 8)