FUSION WELDING ISOLATION MECHANISM FOR OPERATING MECHANISM OF CIRCUIT BREAKER

摘要

A fusion welding isolation mechanism for operating mechanism (107) of a circuit breaker. The operating mechanism of circuit breaker comprises a tripping component (100), a left side plate component (101), a right side plate component (104), a latch component (102), a half shaft component (103), a lever component (105) and a main shaft component (106). The tripping component, the latch component and the lever component are mounted between the left side plate component and the right side plate component. The half shaft component and the main shaft component penetrate through the left side plate component and the right side plate component and extend out of the left side plate component and the right side plate component. The tripping component, the latch component, the half shaft component, the lever component and the main shaft component move in linkage. The lever component and the main shaft component are provided with isolation devices for preventing an operation handle (230) from an opening operation when a moving contact (110) is subject to fusion welding. The fusion welding isolation mechanism for operation mechanism of circuit breaker can limit a rotation stroke of the operation mechanism towards an opening direction, so as to prevent the operation mechanism from being damaged by forced operation. After an external force disappears, the operation mechanism can reset to a closing position automatically.