Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with UL and IEC certification
316 Manual, 01/2019, L1V30435333-01
Installation of other accessories
The installation of the cylinder lock in the accessory compartment of the molded case circuit
breaker partly excludes the installation of other accessory components, e.g. front mounted
accessories such as manual and motor operators as well as front interlocks. Likewise the
cylinder lock blocks slots for internal accessories (for overview see chapter Mounting
locations of 3VA UL molded case circuit breakers (Page 152)).
Cable interlock module using a Bowden cable
A mutual interlock between up to three molded case circuit breakers can be implemented by
means of the front Bowden cable interlock module. This interlock functions according to the
blocking principle: If one of the circuit breakers included in the interlock is unlocked, the
Bowden cables move in such a way as to ensure that the other molded case circuit breakers
are locked in the OFF (O) position.
In order to implement a front Bowden cable interlock, sliding bar modules must be mounted
on the 3VA UL molded case circuit breakers involved. Each of these modules is equipped
with a slide which blocks or releases operation of the handle.
Slide
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