ABB
30
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
4.4.1.2 Manual withdrawal from the service position to the test/disconnected position
Instructions
• Ensure that the circuit-breaker is in the OFF position.
• Reverse the procedure described above for insertion into the
service position.
! Insertion and withdrawal of circuit-breakers must be
gradual, in order to avoid any shocks which could deform
the mechanical interlock. If the operations are prevented,
do not force the interlocks and check that the operating
sequence is correct. The force normally applicable to the
insertion/withdrawing lever is 260 N. In any case, the
maximum applicable force must never exceed 400 N.
Please also refer to the technical documentation of the
circuit-breakers for installation operations.
Insertion and withdrawal must always be carried out
with the circuit-breaker open!
! Do not use force to move withdrawable parts with locking
magnet YO in the event of an auxiliary voltage drop. If this
occurs, they are locked along the whole travel range
between the service and test positions. To remove the
interlock, consult the technical documentation of the
circuit-breakers.
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