Rear Interlock - Siemens 3VA1 100 A Manual

Accessories
4.7 Locking and interlocking
4.7.4

Rear interlock

Rear interlock
The rear interlock system is capable of creating an interlock between two 3VA molded case
circuit breakers and does not restrict the number of accessories which can be assembled on
the front panel of the molded case circuit breaker.
The rear interlock operates according to the following principle: When one molded case
circuit breaker is closed, the other circuit breaker is prevented from closing by a tappet which
engages in the breaker mechanism directly from the rear panel of the molded case circuit
breaker.
The rear interlock is provided by two interlocking modules which are attached at the rear of
the molded case circuit breakers and behind the mounting plate. The two interlocking
modules are interconnected by means of the interlocking rod.
Machining work to the cubicle mounting plate is required.
①
②
③
288
Molded case circuit breaker 1
Molded case circuit breaker 2
Mounting accessories
④
Interlocking modules
⑤
Cubicle mounting plate
⑥
Interlocking rod
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02