ABB
50
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
6) Withdrawable parts with order-related locking magnet Y0 may not be
moved in case of control power failure, or when there is no control
power. Do not forcibly move locked withdrawable parts! The locking
magnet Y0 is only present on manually operated withdrawable parts.
• Releasing the locking magnet Y0:
• Remove front plate.
• Disengage locking magnet Y0 by pulling the magnet armature.
• While doing so, turn crank (80.2) (Figure 4.7) about one half turn
(either direction of rotation is permissible).
The locking magnet is only active in the test position and service
position. In intermediate positions it has no effect.
7) Disconnection of the control-wiring plug as well as later insertion
must be locked in the withdrawable part service position.
8) Operation of the earthing switch must only be possible when
withdrawable part is in the test/disconnected position or the removed
position (subject to any additional electro-magnetic interlock in
individual cases).
Check this condition:
• With the withdrawable part in the test/disconnected position, it must
be possible to press slide (61.7) (Figure 4.23), in front of the earthing
switch operating shaft (61.2) (Figure 4.23), downwards to the
opening position. The earthing switch can then be operated.
• If the slide is pressed down slightly when the travel motor is running,
the motor must then automatically switch off immediately.
Pressing the button continues the selected travel direction.
• When the withdrawable part is moved inwards towards the service
position, pressing down of slide must be locked after only one and a
half clockwise turns on the crank.
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