Load switch operating mechanism: 1. Operating mechanism of spring has high reliability and long mechanical life. The load switch operates 5000 times, while the grounding switch operates 3000 times. 2. Operating mechanism where load switch is integrated with grounding switch in one. There is an interlock between the operating of load switch and operating of grounding switch, to prevent the switch from misoperation. When the switch is in the grounding position, it is unable to close directly. 3. The electric operating mechanism can be selected. 4. The local operation can be realized by using an operating handle, and the remote operation can be realized by secondary interfaces.