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Item
Description
1
Cooling fans
2
Fan assembly fixation holes
3
Fan electrical connections
10.5 DC capacitor change
The active filter DC link contains electrolytic DC capacitors. Their lifespan is up to 8 years
when the filter option 'line to neutral balancing' is not used and up to 5.5 years when the
full capacity of the filter is used for line to neutral balancing. This data assumes that the
filter is used within the ABB approved technical specifications (Cf.
It is not possible to predict a capacitor failure. Contact your ABB service provider if
capacitor failure is suspected. Replacement kits are available from ABB. Do not use other
than ABB-specified spare parts.
Please refer to "9AKK107992A0402- Replacement of DC Capacitors in PQFS - After June
2010" specific detailed procedure for the change of the DC capacitors
Important note: for PQFS older than June 2010, please refer to below specific procedure:
Please refer to "9AKK107992A0401-Replacement of DC Capacitors in PQFS - Before June
2010" specific detailed procedure for the change of the DC capacitors for PQFS older
than June 2010.
10.6 DC capacitor reforming
If the filter has been non-operational for more than one year, the DC capacitors must be
reformed (re-aged) before use. Without reforming, the DC capacitors may be damaged
at start-up.
Stocked or non-operational filters should be reformed once a year. The method
described here assumes that the filter is stocked in a clean and dry environment.
To reform the capacitors,
−
Switch on the power supply to the filter without starting the filter for about 2
hours. Verify with the PQF-Manager the DC capacitor voltage and ensure that it
is charges to a couple of hundred volts.
−
Then, with all harmonics and reactive power and balancing functionality
deselected, start the active filter and leave it running for one hour.
−
The filter is now ready for normal operation
If the filter has been left more than 2 years without operation, please contact your ABB
service provider.
180 Maintenance instructions Manual Power Quality Filter PQFS
Table 56: IGBT cooling fan related items description
Chapter
12).
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Troubleshooting
