Circuit breaker structure with high breaking capacity

The utility model discloses a circuit breaker structure with high breaking capacity, and belongs to the technical field of circuit breakers. The circuit breaker comprises a moving contact assembly and a static contact assembly which are correspondingly matched, and further comprises an arc extinguish chamber which is arranged on the lower side of a contact opening formed by the moving contact assembly and the static contact assembly in an opposite mode. At least a part of metal arc extinguishing grid sheets in the arc extinguishing chamber extend into the inner side of a contact port formed by the moving contact assembly and the static contact assembly. The length of a part of the metal arc extinguishing grid sheets in the arc extinguishing chamber is 30 mm to 35 mm. Compared with a conventional circuit breaker structure, the circuit breaker structure with the high breaking capacity is long in arc striking distance, short in arc extinguishing distance and good in breaking capacity. 本实用新型公开了一种具有高分断能力的断路器结构，属于断