CURRENT-LIMITING AUTOMATIC CIRCUIT-BREAKER Russian patent published in 2008 - IPC H01H77/10 

FIELD: electricity.

SUBSTANCE: circuit-breaker is equipped with additional spring-loaded swing bridge, which is installed inside rotary drum in rotation axis of the main bridge with the possibility of reciprocal displacement along this axis. Circuit breaker is equipped with mechanism of contacts fixation after electrodynamic kick. Mechanism connecting rod is arranged in the form of unit that consists of two parallel plates with figured grooves that are fixed to each other with the help of connecting rod axis and additional axis. In additional axis S-shaped lock is installed with cam surface and stop at the end of lock. Double-cantilever slider is hingedly connected with its first cantilever to the drum. In the second cantilever of slider axis is installed with internal and external rollers. External rollers are installed inside figured grooves of connecting rod. Lock has the possibility of interaction with internal rollers. Kick springs are installed between connecting rod axis and axis with rollers. Besides, at circuit breaker terminal support and spring-loaded lever are arranged with the possibility of contact with additional bridge and mechanism of free tripping. Additional spring-loaded rod is installed in circuit breaker with the possibility of interaction with spring-loaded lever on the one side and lock stop on the other.

EFFECT: increase of current-limiting properties in process of short circuit currents disconnection.

11 dwg