Rotating contact subassembly for circular breaker, has shaft passing through hole of contact arm, and spring whose spring force opens movable contact of contact arm and static contact of electric conductor at breaking position of switch

摘要

The subassembly (100) has a shaft passing through a hole of a contact arm (110) to connect the contact arm, a rotor and a spring. A connecting arm comprises an end which is connected with the rotor in a pivoting manner and another end which is connected with an end of the spring. A guiding mechanism guides the contact arm to switch between a closing position and a breaking position, where spring force of the spring opens movable contacts (111, 112) of the contact arm and static contacts (223, 224) of electric conductors (221, 222) at the breaking position.