Accessories
4.7 Locking and interlocking
3VA molded case circuit breakers with UL and IEC certification
304 Manual, 01/2019, L1V30435333-01
Principle of two interlocked 3VA UL molded case circuit breakers:
Molded case circuit breaker blocked/locked in the safe switching state OFF (O)
Molded case circuit breaker released for operation
The 3VA UL molded case circuit breakers provide the following interlocking options:
● Front interlock
● Rear interlock
All front interlocks are installed on the front panel of the 3VA UL molded case circuit breaker.
Front interlocks make it impossible to install some other external accessories such as motor
operator, rotary operators, etc. They also partially restrict access to internal accessory
compartments.
The rear interlock does not affect the front panel of the 3VA UL molded case circuit breaker.
All components of the interlocking system are concealed behind the molded case circuit
breaker or the mounting plate.
To Next Page
Loading...
