Capacitors; Reforming The Capacitors - ABB ACS580-04 Hardware Manual

Maintenance 109
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Capacitors

The drive intermediate circuit employs several electrolytic capacitors. Their lifespan
depends on the operating time of the drive, loading and ambient temperature. The lifespan
of the capacitor can be prolonged by lowering the ambient temperature.
It is not possible to predict a capacitor failure. The capacitor failure is usually followed by
damage to the unit and an input cable fuse failure, or a fault trip. Contact ABB if a capacitor
failure is suspected. Replacements are available from ABB. Do not use other than ABB
specified spare parts.

Reforming the capacitors


If the drive module has been stored for a year or more, reform the capacitors. See page 34
for information on finding out the manufacturing date. For the reforming instructions, see
Converter modules with electrolytic DC capacitors in the DC link, capacitor reforming
instructions (3BFE64059629 [English]).