Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with UL and IEC certification
306 Manual, 01/2019, L1V30435333-01
If the 3VA UL molded case circuit breaker also needs to be lockable in the ON (I) position,
the metal pin
① on the sliding bar must be removed with pliers, see diagram below. This
deliberate action is a safety precaution and prevents accidental locking of the breaker in the
ON position.
Metal pin
Installation of other accessories
The installed handle blocking device partly excludes the installation of other accessory
components, e.g. front mounted accessories such as manual and motor operators as well as
front interlocks. In addition, the handle blocking device must be removed to gain access to
the accessory compartment for the internal accessories.
The handle blocking device must be removed from the circuit breaker to change the state of
the breaker from OFF to ON or from ON to OFF.
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