power fittings?

power fittings

are defined according to GB/T5075-2001 national standard "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 load, electrical load and certain protection.

classification

1 , according to the role and structure can be divided into suspension clamp, tension clamp, connection fittings, connection fittings, protection fittings, equipment clamps, T type clamps, bus fittings, cable fittings and other categories; According to the purpose, it can be used as line fittings and substation fittings.

2 , according to the power hardware product unit is divided into malleable cast iron, forging, aluminum copper aluminum and cast iron, a total of four units.

3 , can also be divided into national standard and non-national standard .

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

1), hanging hardware fittings, also known as supporting hardware fittings or hanging clamps. This kind of hardware is mainly used to suspend conductor insulator strings (mostly used for linear towers) and to suspend jumpers on insulator strings.

2), anchoring hardware, also known as fastening hardware or wire clip. This kind of hardware is mainly used to fasten the terminal of the wire, so that it is fixed on the wire insulator string, and also used for the fixing of the lightning wire terminal and the anchoring of the cable. Anchoring fittings bear all the tension of wires and lightning protection wires. Some anchoring fittings are changed into conductors

3) and connecting fittings, also known as wire hanging parts. This kind of hardware is used for connecting insulators into strings and connecting hardware and hardware. It bears mechanical loads.

4), continuous hardware. This kind of hardware is specially used for connecting various bare wires and lightning arresters. The connection bears the same electrical load as the conductor, and most of the connection fittings bear the full tension of the conductor or lightning wire.

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

6), contact hardware. This kind of hardware is used to connect hard bus and soft bus with outgoing terminal of electrical equipment, T of conductor and non-bearing parallel connection, etc. These connections are electrical contacts. Therefore, high conductivity and contact stability of contact fittings are required.

7), fixed fittings, also known as power plant fittings or high-current bus fittings. This kind of hardware is used for fixing and connecting various hard bus or soft bus and post insulator in power distribution equipment. Most of the fixed hardware is not used as electrical conductor, but only plays the role of fixing, supporting and suspending. However, since these fittings are used for high currents, all components should be free of hysteresis losses.