System inspection,
maintenance and repair
52
Power Xpert
®
UX with W-VACi
circuit breaker 6063308 G01 01 14 July 2011 www.eaton.com
6 System inspection,
maintenance and repair
The maintenance described in this chapter may be
carried out by the user’s qualified personnel, with due
attention to and compliance with instructions and safety
regulations.
6.1
Logbook
The user should keep a logbook with data relating to the
installation and any maintenance and repair carried out.
The logbook should at least include dates and times of
the following:
All important incidents occurring in and with the
switchgear
All faults;
All maintenance work carried out;
All repairs carried out
Note of contact with Eaton with regard to instructions
and permissions if required for any changes and or
modifications/repairs carried out.
6.2
Inspection and maintenance,
general
Power Xpert
®
UX switchgear and the withdrawable units
used in the switchgear require little maintenance.
However, inspection and checks should be made at
regular intervals and preventive maintenance carried out
usually as part of any normal annual maintenance
procedure.
The first inspection is best carried out after six months of
operation. A suitable inspection and maintenance
schedule can be set up on the basis of this initial
inspection.
If required, Eaton can, at regular intervals or when
considered necessary, carry out an intensive inspection
of the installation and make recommendations with
regard to life extension of the equipment.
Periodic checks can be made by the user’s own qualified
personnel. Eaton can provide guidelines and, if
necessary, training for these.
REMARK
In the event of a fault always contact Eaton.
For checks and maintenance on the withdrawable units,
reference should be made to the specific unit manuals in
the information pack.
Recommended inspection and maintenance schedule for
Power Xpert
®
UX switchgear
Periodic inspection: Annually
Maintenance: Every 5 years.
WARNING
Inspections, checks and maintenance operations
should only be carried out by authorised
specialist personnel. Before inspections, checks
and maintenance operations are commenced; all
necessary steps must be taken to ensure safe
working. This means among other things that:
All parts of the system being inspected must be
dead and earthed.
Protective plates must only be removed after the
installation has been made completely safe.
6.2.1
Periodic check
1. Carry out visual inspection checking:
For dirt, dust and moisture;
Instruments and relays for faults;
For loose or discoloured wiring;
Core end terminations/terminal strips;
For loose plates/mounting material;
For exceptional wear.
2. Remove dust and dirt (if possible use a vacuum
cleaner).
3. Check the condition of the insulator surfaces.
4. If necessary clean with a dry cloth.
5. Inspect insulators
6. Check isolating contacts on the busbar and cable
sides for dirt and damage.
7. Check the adjustment of the auxiliary contacts.
8. Check operation of the switches and interlocks.
9. If necessary grease all pivot points.
10. Check the protective relays in accordance with the
manufacturer’s instructions
11. Withdrawable units that are rarely or never used
should be switched on and off 5 times. This can be
done with the switch in the ‘test’ position.
12. Switch the earthing switch ON and OFF a few times.
6.2.2
Maintenance
1. Carry out the checks described under periodic
checks
2. Measure the contact resistance in the main current
circuit. For resistance values, reference should be
made to the test report in the specific installation
documentation pack that includes this manual
3. Apply a test voltage to the primary circuit.
On completion of the maintenance operations, remove all
special safety measures. Then return the installation to
normal operation.
