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System inspection,
maintenance and repair
Power Xpert
®
UX with W-VACi circuit breaker 6063308 G01 01 14 July 2011 www.eaton.com
53
6.3
Fault diagnosis
If a fault is found in the system, use the troubleshooting
table to look for the cause.
Contact Eaton if you cannot find the cause.
WARNING
If correction of the fault might lead to dangerous
situations, all necessary steps must be taken to
limit these dangers to a minimum. You should
contact Eaton if work on the primary part of the
installation is required.
All operations must be carried out by or under
the supervision of qualified persons.
6.3.1
What to do in the event of a fault
NOTE
Always make the installation safe if a fault occurs.
Isolate the installation if necessary.
Simple faults in the secondary part of the installation
(such as defective signal lamps) can and may be
repaired by the user’s own authorised personnel.
Faults in the primary part of the installation and serious
faults in the secondary part must always be reported to
Eaton.
Mechanical adjustments must be made by Eaton.
Every fault and all operations carried out must be
recorded in the logbook.
6.3.2
Troubleshooting table
Symptom
Possible cause
What to do:
58-pole secondary plug cannot
be removed.
Withdrawable unit is in the
‘Service/Connected’ position.
Put the unit into ‘TEST’ position.
Earthing fault.
Poor insulation.
Check insulation.
Earthing switch cannot be
switched on.
Withdrawable unit is in
‘Service/Connected’ position.
Locking coil in operation.
Put switch into ‘TEST’ or ‘INSERT/
WITHDRAWN’ position.
Check interlocks;
Check connection conditions for the relevant
earthing switch.
Door cannot be closed.
Transport truck has not been removed.
Withdrawable unit not correctly inserted
Remove the truck.
Ensure unit is correctly inserted
No auxiliary voltage.
Auxiliary voltage protection tripped.
58 pin auxiliary socket not connected
Correct problem and switch on again.
Connect the 58 pin auxiliary socket
High contact resistance in
earthing circuit.
Loose bolted joint.
Check bolted joint for correct tightening
torque.
Clean suspect connections;
Tighten bolt securely.
High temperature at cable
connections.
Loose bolted joint at cable connection.
Check bolted joint for correct tightening
torque.
Clean suspect connections.
Tighten bolt securely.
Auxiliary voltage often interrupted
by protection device.
Poor insulation.
Check insulation.
Switch cannot be operated.
Switch not in ‘TEST’ or
‘Service/Connected’ position.
Hand crank has not been removed.
Put switch into correct position.
Remove hand crank.