This equipment is a new type of switching equipment designed for urban electric network’s transformation and construction. In the power distribution system with AC 3-10kV and 50Hz, it is also used for breaking load current, short-circuit current and closing short-circuit current. Widely used in urban electric network’s transformation and construction projects, industrial and mining enterprises, high-rise buildings and public facilities, the product distributes, controls and protects electric power as a ring main unit and terminal equipment. It is equipped with vacuum load switches and spring operating mechanism. This mechanism has not only manual operation but also electric operation. Grounding switches and isolating switches are equipped with manual operation system. This equipment has a strong completeness, small size, no combustion danger, no explosion danger and reliable “five-anti” function.