The busbar joint protection box is made of radiation cross-linked polyolefin material. It has excellent physical, chemical and electrical properties. It is an insulating material for the busbar connection. It is also suitable for 1KV/10KV/35KV voltage levels and is available in I type, T type and L type. Type, + type and other shapes of protective boxes. It has functions such as electrical insulation, solder joint rust and corrosion prevention, mechanical protection, and phase spacing reduction, and is widely used in electronics, communications, and machinery. Manufacturing and other fields. It has the characteristics of excellent electrical insulation, convenient construction and installation, good environmental adaptability, and long service life. It is mainly used for insulation protection and safety protection of busbar connections in switchgear factories, power plants, and substations. Eliminate short circuit accidents caused by foreign objects overlapping and crawling animals: prevent personal electric shock, pollution and condensation flashover; reduce the corrosion of conductive materials by air and harmful gases, and extend the service life of electrical equipment. The use of busbar protection boxes when installing busbar bridges can effectively insulate, especially the bridge connection parts.