1ZSE 5492-124 en, Rev. 6 | Maintenance guide UCG 27
CAUTION
ABB recommends that only authorized personnel from
ABB carry out contact replacement.
Replace worn-out main switching contacts and transition
contacts as required. (It is not necessary to replace both main
switching contacts and transition contacts if, for instance,
only the main switching contacts are worn out).
CAUTION
Fixed contacts and its corresponding moving contacts
should always be replaced at the same time.
Also replace contacts which are assumed to wear out before
the next overhaul.
Replacement of contacts is described in the following
sections.
4. Contact replacement
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