ABB PQFA Instruction Manual page 89

The fault clearance procedure starts with the opening of the power circuit
breaker. The system is reset and the filter conducts again the start-up
sequence as shown hereafter. The fault message can be accessed through
the PQF-Manager.
If within 30 seconds after the re-start of the IGBT' s no critical fault occurs, the
initial fault is cleared and the filter comes back to normal operation.
If a critical fault occurs during those 30 seconds, either it is a different fault
than previously and a new fault clearance procedure is conducted or it is the
same fault.
If it is the same fault, a fault clearance procedure will be re-conducted until the
same fault is detected 5 consecutive times.
In this case, the power breaker is opened, the filter definitively stopped and
the alarm led on the PQF-Manager is lit. The error message can be accessed
through the PQF-Manager.
This procedure is shown in the next page.
Start fan
for 10s
Preload
DC bus
Close MC
Start IGBT
Network
characterisation
Asea Brown Boveri Jumet S.A.
PQFA Instructions Manual
89