Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with IEC certificate
378 Manual, 03/2019, A5E03603177010-03
Example of an interlock between two 3VA molded case circuit breakers:
One article number always includes:
● 2 side plates
● 1 locking slide
The following interlock combinations can be implemented with the sliding bar:
● Interlocks can be implemented between the same rated current versions of molded case
circuit breakers:
– 3VA11 with 3VA11
– 3VA12 with 3VA12
– 3VA13 / 3VA14 / 3VA23 / 3VA24 with 3VA13 / 3VA14 / 3VA23 / 3VA24
– 3VA20 / 3VA21 / 3VA22 with 3VA20 / 3VA21 / 3VA22
– Not available for 3VA25
● All 2-pole (see note below), 3-pole and 4-pole molded case circuit breakers of the same
size can be interlocked.
The 2-pole molded case circuit breaker must always be mounted on the right-
the sliding bar module.
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