The Siemens SIRIUS 3RV1976-0BA0 is a lever-type rotary operating mechanism with an integrated lock and door interlock, designed specifically for size 3RV1.6 and 3RV1.7 circuit breakers. This is the handle and interlock assembly that mounts to the enclosure door, letting an operator manually switch the breaker on and off while preventing the door from opening when the breaker is in the ON position. It is a current-production part within the SIRIUS family.
Panel Integration
This mechanism is the door-mounted operator for a 3RV1 motor-protective circuit breaker in a panel or enclosure. The door interlock ensures the enclosure door cannot be opened while the breaker is closed, which is a standard safety requirement for motor control centers and distribution panels. It mounts directly to the enclosure door and couples to the breaker's rotary drive shaft.