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Service
3ADW000488R0101 DCS880 Service manual e a
Exchange current transformers size H8
Before the work is started, disconnect the converter completely from the power supply,
then check the voltage free condition and make sure, everything is located in an electrical
and mechanical safe condition!
If current transformers fail or need to be repaired, the following has to be considered:
− It is important, that all current transformers are orientated and mounted in the same way on the busbars.
− Check the wiring of the old current transformers according the figure in chapter Wiring
. It is important, that
all current transformers are wired in the same way. Take additional care in case the connection is not
done by coded twisted pair cables.
Current transformer type
− The current transformers are located outside the H8 module.
− AC busbars are routed through the current transformers. The current transformers are mounted on the
busbars by means of screws.
− The connection to the electronics is done via twisted pair cables with coded faston plugs on both ends.
Exchange
− Disconnect the AC wires / busbars at the
side of the drive.
− Remove the mounting screws.
− Remove the old current transformers.
− Install the new current transformers with
proper orientation.
− Fix the current transformers by means of
the mounting screws.
− Take care of proper electrical
connections.
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