Siemens 3VA1 100 A, Manual

Page: 285 / 532

Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02
285
4.7.3.3 Sliding bar
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
①
Side plate
②
Locking slide
1. Attach two side plates
①
to the sides of the 3VA molded case circuit breakers.
2. Attach the locking slide
②
securely to the two side plates.
Locking the handle
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.