Electrical auxiliary device of circuit breaker

The invention discloses an electrical auxiliary device of a circuit breaker. The electrical auxiliary device is characterized by comprising a bimetallic sheet (1), a flame-retardant shell (2), a trip device (3) and an electromagnetic system (8), wherein the bimetallic sheet (1) is arranged in the flame-retardant shell (2) and is connected with a connection metal rod (6) by a connection line, the connection metal rod (6) is connected in series to a circuit breaker (7), the electromagnetic system (8) is arranged in the circuit breaker (7) and is connected with the trip device (3) by the connection line, an electromagnetic coil (4) is arranged in the electromagnetic system (8) and drives an electromagnetic iron core (5) by a magnetic force, and the electromagnetic coil (4) is adaptive to the electromagnetic iron core (5). 本发明公开了种断路器电气辅助装置,其特征在于：包括双金属片（1）、阻燃外壳（2）、脱扣装置（3）和电磁系统（8）；所述阻燃外壳（2）内设有双金属片（1），双金属片（1）通过连接线与连接金属杆（6）相连接，连接金属杆（6）串联入断路器（7）内；所述断路器（7）内设有电磁系统（8），电磁系统（8）通过连接线与脱扣装置（3）相连接，电磁系统（8）内设有电磁线圈（4），电磁线圈（4）通过磁力