Troubleshooting - ABB Uniswitch Operation And Maintenance Manual

6

Troubleshooting

Problem
All cubicle types
Switch-disconnector cannot be closed.
Switch-disconnector cannot be opened.
Switch-disconnector cannot be moved to
the earthed position.
Switch-disconnector cannot be moved
from the open to earthed position.
Cable compartment door will not open or
close.
Motor operated switch-disconnector
Switch-disconnector will not close or
open.
Switch-fuse cubicle
Switch-fuse will not close.
ABB
Uniswitc h Operation and
Maintenanc e Manual
Action
•
Check that the switch is in the open position.
•
Check that the interlocking selector is in the
'Operation' position.
•
Turn the operating handle clockwise.
•
Check that the switch is in the closed position.
•
Check that the interlocking selector is in the
'Operation' position.
•
Turn the operating handle anti-clockwise.
•
Check that the switch is in the open position.
•
Check that the interlocking selector is in the 'Test'
position.
•
Turn the operating handle clockwise.
•
Check that the switch is in the earthed position.
•
Check that the interlocking selector is in the 'Test'
position.
•
Turn the operating handle clockwise.
•
Check that the switch is in the earthed position.
•
Check that the interlocking selector is in the 'Door
open' position.
•
Check that the switch is not in the earthed position.
•
Check that the interlocking selector is in the
'Operation' position.
•
Check that the auxiliary power supply is connected.
If the switch is in the open position due to a fuse trip or
motor operation, the notch on the operating shaft is to be
turned downwards before the switch can be operated to
the closed position.
Check to see if a fuse has blown.
52
UNI S14GB 05-02