Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
311
4.7.3
Front interlocking
Front interlocks are installed on the front panel of the 3VA UL molded case circuit breaker.
The following interlocking methods are available for the 3VA UL molded case circuit breaker:
●
Cylinder locks for implementing interlocks between an unlimited number of molded case
circuit breakers
●
Cable interlock module using a Bowden cable
●
Sliding bar
4.7.3.1
Cylinder locks for interlocking multiple 3VA UL molded case circuit breakers
With cylinder locks (type Ronis) in the accessory compartments, molded case circuit
breakers cannot only be locked (see chapter Cylinder locks for locking the 3VA molded case
circuit breaker (Page 307)), but it is also possible to mutually interlock any number of
3VA UL molded case circuit breakers. This ensures that only one 3VA UL molded case
circuit breaker at a time in the interlock application can be in position ON (I).
In order to implement an interlock application on multiple 3VA UL molded case circuit
breakers, the following two components must be ordered for each 3VA UL molded case
circuit breaker to be interlocked:
●
One cylinder lock (type Ronis)
1 lock and 2 keys are always included in the order
Note
It is important to order the same lock number for all circuit breakers to be included in the
interlock arrangement.
