Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
319
With the front sliding bar, up to three 3VA UL molded case circuit breakers of the same size
can be mutually interlocked with a bar device. The sliding bar can be locked with up to three
padlocks (shackle diameter 1/4" to 5/16" / 6 mm to 8 mm).
Installing the sliding bar
Side plate
Locking slide
1. Attach two side plates ① to the side of the 3VA UL molded case circuit breaker.
2. Attach the locking slide
② securely to the two side plates.
The handle of the 3VA UL molded case circuit breaker to be interlocked is blocked by sliding
the locking slide.
Up to three commercially available padlocks (shackle diameter 1/4" to 5/16" / 6 mm to 8 mm)
can be fitted to lock the slide in position and prevent operation of the blocked handle. The
blocked 3VA UL molded case circuit breaker is thus always locked in the safe and locked
OFF (O) position, while the released 3VA UL molded case circuit breaker can be actuated.
If the locking slide is in the midway position and locked there with padlocks, two or all three
of the molded case circuit breakers can also be blocked or secured in the OFF (O) position.
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