According to the function and structure, electric power fittings can be divided into hanging wire clamp, tensioning wire clamp, connecting metal fittings, connecting metal fittings, protective metal fittings, equipment wire clamp, T-shaped wire clamp, busbar metal fittings, drawing wire fittings and so on.

Connecting fittings are mainly used for overhead power lines or substations to connect conductors and lightning conductor clips with insulators or insulators and lightning conductor clips with poles and towers. According to different installation conditions, special connecting fittings refer to ball head hanging rings and bowl head hanging plates connected with insulators. The universal connection fittings are suitable for all kinds of situations, graded according to load tonnage, and the fittings with the same load have interchangeability.

Connecting fittings are mainly used for connecting and repairing overhead power line and lightning conductor. According to the different structure form and installation method, it is divided into compression type, bolt type and twisted wire type three kinds: compression type is divided into hydraulic pressure, explosive pressure and clamp pressure three kinds.

Power fittings are metal accessories that connect and combine various devices in power system and play a protective role. In the review and acceptance organized by The State Grid Corporation of China and the Ministry of Science and Technology, the experts of the acceptance committee agreed that the development of uHV fittings has filled the gap of the national high voltage power fittings, and the research results have reached the international advanced level. The sample of power fittings has reasonable design and excellent performance, which can meet the construction needs of uHV AC transmission line project.