SF6 ring main unit is a high-voltage ring main unit that uses SF6 load switch as the main switch. It is mainly used in medium voltage electrical systems and can achieve functions such as multi circuit access, switching, interconnection, and protection of power systems. The structure of SF6 ring main unit includes control room, busbar room, and cable room. The control room is equipped with operating mechanism and secondary line circuit control switch. The busbar room is equipped with SF6 load switch. The cable room is used to connect external cables and can install other auxiliary equipment. Working principle of SF6 ring main unit The SF6 ring main unit forms a closed power supply system through a dual input mode. When one circuit fails, the other circuit can provide power to ensure the stability of the power supply. SF6 gas has good insulation and arc extinguishing performance. Installing switches in fully enclosed SF6 gas can effectively improve the stability and lifespan of switches, making the service life of SF6 ring main units up to 20 years. Advantages of SF6 ring main unit Excellent insulation performance: SF6 gas has excellent insulation performance, which can effectively isolate arcs and improve equipment safety. High stability: SF6 gas is sealed inside the shell, forming an invisible partition fracture, which improves the stability and service life of the equipment. Low maintenance cost: SF6 ring main unit has a simple structure, easy maintenance, and long service life, reducing maintenance costs.
