Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
377
Installation of other accessories
When the front Bowden cable interlock module is fitted, some other accessories cannot be
installed, see chapter Possible combinations of of accessories (Page 186).
The sliding bar can be used to implement an interlock between three 3VA molded case
circuit breakers of the same size. Up to three padlocks (shackle diameter of between 4.5 and
8 mm) can be attached in order to lock the bar in position.
Installing the sliding bar
Side plate
Locking slide
1. Attach two side plates â‘ to the sides of the 3VA molded case circuit breakers.
2. Attach the locking slide
â‘¡ securely to the two side plates.
The handle of the 3VA molded case circuit breaker to be locked is blocked when the locking
slide is moved into position.
Up to three commercially available padlocks (shackle diameter 4.5 to 8 mm) can be fitted to
lock the slide in position and prevent operation of the blocked handle. The blocked 3VA
molded case circuit breaker is thus always locked in the safe OFF (O) position, while the
released circuit breaker can still be operated.
If the locking slide is in the midway position and locked there by padlocks, both or all three of
the molded case circuit breakers can be blocked or held securely in the OFF (O) position.
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