ABB
17
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
3.5.2.2 Normal interlocking
General Normal interlocking is determined by the position of the interlocking
selector mechanism. The selector can be locked in the required position
using a padlock.
Interlocking Locked in ‘Operation’ position:
Switch-disconnector can only be operated close-open.
Locked in ‘Padlock’ position:
Switch-disconnector is in open position, it cannot be operated.
Locked in ‘Test’ position:
Switch-disconnector can only be operated open-earthed.
Locked in ‘Door open’ position:
Switch-disconnector is in earthed position, it cannot be operated.
Cable testing When the cable compartment door is open, the SFG switch-
disconnector is locked in the earthed position. The interlocking can be
removed by moving the interlock selector to the ‘Test’ position. This will
allow the switch-disconnector to be operated to the open position to
enable insulation measurement of the cables.
After measurement, the switch-disconnector first has to be moved to the
earthed position before the interlock selector can be moved to the ‘Door
open’ position so that the door can be closed.
3.5.2.3 Additional interlocking
Interlocks
• Key lock on the SFG switch-disconnector. The interlock can be
verified with a micro switch when motor operated.
• Double key lock on the SFG switch-disconnector. The interlock can
be verified with a micro switch when motor operated.
Additional locks such as Castell and Ronis are also possible.
To Next Page
Loading...
