ABB
25
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
4.3 Operating the fixed type switchgears
4.3.1 Manual operation of the SFG switch-disconnector
4.3.1.1 Closing the SFG switch-disconnector
Figure 4.1
Closing the switch-
disconnector.
1) Ensure that the switch-disconnector’s position indicator is in the 0-
position (1).
2) Check that the interlocking selector is in the ‘Operation’ (2) position
and that the notch on the shaft end is pointing down (3).
3) If it is a fused switch-disconnector that is to be operated to the open
position due to a blown fuse or motor operation, the notch on the
shaft is to be rotated to point downwards before the switch-
disconnector is operated to the closed position.
4) Put the operating handle into the hole so that the guide key goes
into the notch on the shaft.
5) Turn the operating handle clockwise about 80 degrees until the
switch-disconnector closes.
6) If the device is fitted with a double spring control mechanism
(switch-fuse), the turning force must be increased towards the end
of the movement until the switch-disconnector finally closes. The
operation movement is always to be completed once started.
4.3.1.2 Opening the SFG switch-disconnector
Figure 4.2
Opening the switch-
connector.
1) Ensure that the switch-disconnector position indicator is in the I-
position (1).
2) Check that the interlocking selector is in the ‘Operation’ (2) position.
3) Check that the notch on the operating shaft is pointing to the left (3).
4) Put the operating handle into the hole so that the guide key goes
into the notch on the shaft.
5) Turn the operating handle anti-clockwise about 80 degrees until the
switch-disconnector opens.
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