System operation
Power Xpert
®
UX with W-VACi circuit breaker 6063308 G01 01 14 July 2011 www.eaton.com
47
4.4
Checks
WARNING
Checking and testing procedures must only be
carried out by expert and authorised personnel.
This paragraph describes the main checking and testing
procedures for Power Xpert
®
UX switchgear:
Operation of the automatic shutters;
Testing the voltage indicator according to users’
procedure;
Testing for dead cables and busbars according to
users’ procedure;
Testing for phase coincidence according to users’
procedure.
4.4.1
Shutter lifter truck
Power Xpert
®
UX with W-VAC
i
is provided with automatic
shutters, which protect the cable side and/or busbar side
isolating contacts when there is no switch in the panel.
If access to the primary contacts, either busbar or cable,
is required then a shutter lifter truck is used to gain
access to these contacts.
WARNING
When using the shutter lifter truck to gain access
to the fixed primary contacts BEWARE that the
contacts may be LIVE and suitable safety
precautions should be taken.
Proceed as follows:
Insert withdrawable shutter lifter truck unit to test
position
1. Open the door of the unit compartment and remove
the switch if present.
2. Fit the shutter lifter:
For busbar and cable side shutters: Place
push plate as indicated on the picture
Fig. 4-15
For busbar side shutters: Place push plate as
indicated in the picture Fig. 4-16
For cable side shutters: Place push plate as
indicated on the picture Fig. 4-17
3. For remaining steps, refer to inserting the unit to the
Test position of paragraph 4.2.3
Opening the shutter
1. If there is an earthing switch fitted, check that it is
switched Off.
2. Insert the shutter lifter truck from Test position to
Service position.
3. Now busbar and/or cable side shutter is open
depending on the configuration 1, 2, 3 above.
Fig. 4-15 Shutter lifter truck for busbar and cable side
shutters
Fig. 4-16 Shutter lifter truck for busbar side shutter
Fig. 4-17 Shutter lifter truck for cable side shutter
