What are power fittings

       According to the definition of GB/T5075-2001 national standard "Terms and Terms of Power Fittings": Power fittings are metal accessories that connect and combine various devices in the power system and play a role in transmitting mechanical loads, electrical loads and certain protective functions. Iron or aluminum metal accessories widely used in power transmission lines are collectively referred to as fittings.

1. According to the function and structure, it can be divided into categories such as suspension wire clamps, tension wire clamps, UT wire clamps, connection fittings, connection fittings, protection fittings, equipment wire clamps, T-type wire clamps, busbar fittings, and wire pulling fittings; according to the purpose, it can be used as line fittings and substation fittings.

2. According to the power fitting product unit, it can be divided into forgeable cast iron, forging, aluminum-copper-aluminum, and cast iron, a total of four units.

3. It can also be divided into national standards and non-national standards

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

1), Suspension fittings, also known as support fittings or suspension wire clamps. This kind of hardware is mainly used to hang the conductor insulator string (mostly used for straight pole towers) and to hang jumpers on the insulator string.

2) Anchor hardware, also known as fastening hardware or wire clamp. This kind of hardware is mainly used to fasten the terminal of the conductor to fix it on the wire insulator string. It is also used to fix the terminal of the lightning conductor and anchor the wire. The anchor hardware bears all the tension of the conductor and lightning conductor. Some anchor hardware becomes a conductor

3) Connecting hardware, also known as hanging wire parts. This kind of hardware is used to connect insulators into strings and connect hardware with hardware. It bears mechanical load.

4) Connecting hardware. This kind of hardware is specially used to connect various bare conductors and lightning conductors. The connection bears the same electrical load as the conductor, and most of the connecting hardware bears all the tension of the conductor or lightning conductor.

5) Protective hardware. This kind of hardware is used to protect wires, insulators, etc., such as equalizing rings for protecting insulators, heavy hammers for preventing insulator strings from being pulled up, anti-vibration hammers and wire protection lines for preventing wire vibration, etc.

6) Contact hardware. This kind of hardware is used to connect hard busbars, soft busbars and outlet terminals of electrical equipment, T-connections of wires and non-load-bearing parallel connections, etc. These connections are electrical contacts. Therefore, higher conductivity and contact stability of contact hardware are required.

7) Fixed hardware, also known as power plant hardware or high-current busbar hardware. This kind of hardware is used to fix and connect various hard busbars or soft busbars to support insulators in distribution equipment. Most of the fixed hardware is not used as a conductor, but only serves to fix, support and suspend. However, since these hardware are used for large currents, all components should be free of hysteresis loss.