Auxiliary switch is a kind of accessory used for remote automatic opening closing of circuit breaker. The electric operating mechanism includes motor operating mechanism electromagnet operating mechanism. The motor operating mechanism is circuit breaker with shell grade rated current of 400A above. Electromagnet operating mechanism is suitable for MCCB with rated current of 225A below Circuit breaker (there are contactors with rated current of 400A above), whether electromagnet motor, their pull in rotation direction are the same, only by the position of the cam inside the electric operating mechanism to achieve closing opening. When operating with the electric mechanism, the circuit breaker should be able to ensure the open circuit under any voltage between 85% 110% of the rated control voltage The device is closed reliably.

The auxiliary switch is suitable for moulded case circuit breaker. A mechanism for turning the operating handle is installed on the cover of the circuit breaker. The rotating shaft of the handle is installed in the matching hole of the mechanism. The other end of the rotating shaft passes through the door hole of the drawer cabinet. The handle of the rotary handle is installed on the shaft head exposed above the door of the complete set of device, the round square seat of the handle is fixed on the door with screws Outside the door, the handle of the handle is turned clockwise anticlockwise to ensure the closing opening of the circuit breaker. At the same time, turning the handle can ensure that the cabinet door can be opened when the circuit breaker is closed; the door of the switch board can be opened only when the handle is turned off re buckled. In case of emergency, when the circuit breaker is in "closing" the door panel needs to be opened, press the red release button on the edge of the rotary handle seat.