Power fittings are metal accessories that connect and combine all kinds of devices in power system and play the role of transferring mechanical load, electrical load and some protection.

According to the function structure, power fittings can be divided into suspension clamp, tension limit, connection fittings, protection fittings, equipment wire clamp, T type wire clamp, bus fittings, wire fittings and other categories, according to the use can be divided into line fittings and substation fittings.

According to the product unit of electric power fittings, it can be divided into malleable cast iron, forging and pressing, aluminum and copper and cast iron.

According to the main performance and use of gold fittings can be roughly divided into the following categories.

1) Suspension fittings, also known as support fittings or suspension clamp. This kind of fittings is mainly used for hanging wire insulation sub-string (mostly used for straight line tower) and hanging jumpers on insulator string.

2), anchoring tools, also known as fastening tools or wire clamp.

3) Connecting fittings, also known as wire hanging parts. This kind of appliance is used for connecting insulator string and connecting appliance to appliance. It bears mechanical loads.

4) Connecting fittings. This kind of hardware is specially used for connecting all kinds of bare wire and lightning conductor. The connection bears the same electrical load as the conductor, and most connectors bear all the tension of the conductor or lightning conductor.

5) Protective fittings. This kind of metal is used to protect conductors and insulators, such as pressure equalizing ring for insulator protection, heavy hammer to prevent insulator string from being pulled out, vibration hammer and wire protector to prevent conductor from vibrating, etc

6) Contact with gold fittings. This kind of hardware is used for connecting hard bus, soft bus and outlet terminal of electrical equipment, T connection of wire and parallel wire connection without bearing force, etc. These connections are electrical contacts. Therefore, high conductivity and contact stability are required.

7) Fixed fittings, also known as power plant fittings or high current busbar fittings. This kind of fixture is used for fixing and connecting all kinds of hard bus or soft bus and prop insulator in power distribution device. Most of the fixture fixture is not used as a conductor, but only plays a role of fixing, supporting and suspending. However, as these fittings are designed for high currents, all elements should be free of hysteresis losses.