ABB PQFS Installation, Operation And Maintenance Instructions page 63

Filter (auxiliaries) connected to
the supply, predefined error
appears
Filter (auxiliaries) connected to
the supply, predefined error
disappears
The alarm conditions that can be assigned to a digital output are given in
assignment must be made with the PQF-Manager. Any of the six digital outputs can be
used to cable an alarm. A maximum of 3 alarms can be assigned to the digital outputs.
Note however that by default the digital outputs have been set up for monitoring other
functions than alarms (cf.
navigate to the digital output setup menu.
Table 26: List of possible alarm conditions that may trigger the alarm/digital outputs
Alarm condition
Supply voltage (RMS) unacceptably
high
Supply voltage (RMS) unacceptably
low
One of the phases of the supply is
missing
Network imbalance unacceptably high
Frequency variation unacceptably
high
PQFS DC bus voltage unacceptably
high
PQFS internal preload error
PQFS overcurrent fault
PQFS ground fault
PQFS IGBT fault
PQFS IGBT overtemperature
Control board temperature too high
PQFS internal power supply fault
PQFS control board fault
PQFS unit down (i.e. not operational
due to error)
Remark: the alarm trigger levels cannot be changed by the user.
For cabling the digital output contacts as alarm contact, the same approach as shown
in Figure 44 can be adopted. Note however that the following behavior will result:
−
The voltage applied to the external monitoring device will be low when:
Closes when error present for 3 minutes.
Otherwise, contact remains open.
When closed before, opens when error disappears.
When opened before, remains open.
Table 10) Refer to Section 7.9.1.4
Criteria to be fulfilled before contact is activated
Vrms_max > 110% Vnominal
Vrms_min < 90% Vnominal
Vrms_min < 60% Vnominal
Vimbalance > 2%
Frequency variation > 20%/s
Vdc > 105% Vdc_max_allowed
DC capacitor voltage rise too low in preload phase or
the DC capacitors could not be preloaded in an
acceptable time.
Internal current higher than allowed
Internal ground current higher than allowed
IGBT hardware reports internal permanent error
IGBT hardware reports internal overtemperature
Internal control board temperature probe reports
too high temperature
Internal control voltage too low or not present
Internal control board reports an error
Any of the units in a multi-unit arrangement is not
running although the start-command has been given.
Manual Power Quality Filter PQFS  Electrical design and installation 63
Table 26.
for guidelines on how to
The