ABB Vmax Manual page 31

5.1.3. interlock in the case where non-abb
withdrawable trucks are used
Vmax circuit-breaker is implemented with mechanical
connection for interlocks purpose.
1) to prevent movement of a closed circuit-breaker
The rotating locking device (1) (fig. 25) on the circuit-
breaker can be used for this purpose: if the Vmax circuit-
breaker is closed, the rotating locking device is down close
to the base plate (2) (fig. 25).
This prevents movement of the withdrawable truck and
therefore movement of the circuit-breaker.
fig. 25
3
fig. 25a
2) to prevent closing of an intermediate circuit-breaker
position.
The slide locking device (3) (fig. 25a) on the circuit-breaker
can be used for this purpose: if the Vmax circuit-breaker,
fitted on non-Abb truck, is in intermediate position, the
slide locking device must be pulleed down as shown (4)
(fig. 25a). This prevents movement closing circuit-breaker
in intermediate position.
note: any additional interlocks must not exert any force on
the circuit-breaker drive.
2
4
1
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