Replacing The Wfu-Xx Filter Capacitor (Wfu-21 And Wfu-22); Reforming The Dc Capacitors Of The Regen Supply Module - ABB ACSM1 Hardware Manual

Replacing the WFU-xx filter capacitor (WFU-21 and WFU-22)

1. Remove the cover.
2. Disconnect the three cables.
3. Unfasten the four screws.
4. Lift the capacitor out of the filter module.
5. Remove the rings.
6. Unfasten the nut at the bottom of the capacitor so you can detach the capacitor
from the plate.
7. Install a new capacitor in opposite order.
Note: When installing a new capacitor, you can connect the three cables in any
order.
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Reforming the DC capacitors of the regen supply module

The DC capacitors must be reformed if the regen supply module has been stored for
a year or more. See page
For information on reforming the capacitors, contact your local ABB representative.
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6
33 for information on finding out the manufacturing date.
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Maintenance