What is a fitting on a high voltage line, and this is something on a high voltage line

Fittings on high-voltage lines: wire sticks, card beans, ground anchors, upper and lower wedges, wire insulators, steel strands, two-eye plates, wire hoops, and heart-shaped rings.

The voltage levels of China's domestic high-voltage transmission lines are generally divided into: 35kV, 110kV, 220kV, 330kV, 500kV, 750kV, etc. Among them, 110kV and 330kV are mostly used in the northern region.

Generally, the transmission voltage below 220 kV is called high-voltage transmission, the transmission voltage between 330 and 750 kV is called ultra-high voltage transmission, and the transmission voltage above 1000 kV is called UHV transmission.

High-voltage lines belong to pillar insulators. 【Tianheng Power】Strut insulator is a special insulation control, which can play an important role in overhead transmission lines. In the early years, pillar insulators were mostly used for utility poles, and slowly developed into a lot of suspended insulators hung at one end of the high-type high-voltage wire connection tower, which was to increase the creepage distance, usually made of silica gel or ceramic, and was called insulators.

Insulators play two basic roles in overhead transmission lines, namely supporting the conductor and preventing the current from returning to the ground, these two functions must be guaranteed, the insulator should not produce flashover breakdown due to changes in environmental and electrical load conditions and failure, otherwise the insulator will lose its effect, which will damage the use and operation life of the entire line.

The one you see is an insulator.

These black or dark brown things are insulated porcelain bottles, which are mainly used to isolate all kinds of wires laid on them to prevent short circuits and arc ignition.

What is it called, forgot! It prevents the vibration of electric shallow shaking and increases the service life of the wire!

Shockproof hammer shockproof hammer effect: the high-voltage overhead line has a large pitch and a high tower, and when the wire is blown by a strong wind, a strong vibration will occur. When the conductor vibrates, the working conditions at the conductor suspension are the most unfavorable.

Long-term and periodic vibration will cause fatigue damage to the wire, so that the wire will be broken and broken. Sometimes strong vibrations can also damage fittings and insulators.

In order to prevent and reduce the vibration of the wire, a certain number of shockproof hammers are generally installed near the hanging wire clamp. When the wire vibrates, the anti-shock hammer also moves up and down. Generating a force that is out of sync or even opposite to the vibration of the wire can reduce the amplitude of the wire and even eliminate the vibration of the wire.

Anti-vibration hammer to prevent the wire from vibrating.

These small balls are called aviation warning balls, in fact, they are like traffic lights, providing a visual warning effect to prevent the occurrence of low-altitude contact with high-voltage lines. In addition to warning balls, there are also obstruction lights on the power towers, which flash in the dark night.

The diameter of these aviation warning balls = 600mm, and the color of the sphere can make a variety of colorful appearances all white, all orange, all red, orange and white, and orange and red. The ball material is engineering reinforced plastic, the clamp between the aviation warning ball and the high-voltage cable is cast aluminum, and the fasteners are made of stainless steel. The weight of the ball is not more than 15kg.

Aviation Marker Ball (Aviation Warning Ball) Diameter = 600mm • Sphere color can be made of a variety of colorful appearances All white, all orange, all red, orange and white two-color, orange-red two-color • Sphere material is engineering reinforced plastic Aviation warning ball and high-voltage wire cable clamp is cast aluminum, fasteners are made of stainless steel. Ball weight 15kg.

Web Links.

According to the developed countries of Europe and the United States, they mainly use an item called the aviation obstacle ball as a warning to identify the ultra-high voltage transmission cable, the product is a spherical aviation warning marker, suitable for overhead transmission lines, especially ultra-high voltage transmission cables, cross-river transmission cables, developed countries in Europe and the United States require domestic power cable companies to set up aviation obstacle balls at equal intervals on their lines, in order to play a warning role for pilots. For how to set up the aviation obstacle ball and sign it in developed countries in Europe and the United States, there is a relatively mature practice, which is mainly divided into the following three parts:

The aviation obstacle ball is installed on the steel cable of the lightning protection ground wire of the overhead tower, and must be set at equal intervals, and its spacing should be suitable for the diameter of the obstruction light.

Aviation obstacle balls are available in red, orange or white and should be alternately set up.

When involving multiple wires, cables, etc., the aviation obstacle ball should be located at a height not lower than the highest overhead line marked.

The ball or ring of the high-voltage wire, called the equalizing ball or equalizing ring, is used to improve the distribution of the high-voltage electric field (equalization) and prevent corona discharge or even flashover (arc discharge) on the surface of the high-voltage wire (or electrode) due to the high electric field strength.

The top two of the high-voltage overhead lines are usually lightning protection lines (located on the top of the tower, without insulator strings), which can prevent the high-voltage lines from being directly struck by lightning.

The first picture is a load switch, which is an electrical device that can be connected and disconnected with a load, and can be operated by operating a lever.

The second picture is the drop-out fuse, which is the meaning of the fuse, when the fuse inside the drop-out fuse is blown out, it can be separated immediately to form an obvious disconnection point, indicating the state of the fuse. It can also be used to turn on or off loads with low current.

The third picture is the lightning arrester, with a line on the top, with a voltage, and a ground wire on the bottom. Under normal voltage, the arrester is in a state of high blocking and circuit and is not conductive. When the line encounters direct lightning or induced lightning, when the lightning wave flows through the arrester, due to the high voltage of the lightning wave, the lightning arrester breaks down, and the lightning arrester presents a low-resistance conduction state, and the lightning wave is discharged into the earth through the grounding wire to protect the safety of electrical equipment.

The term is called interphase spacer.

I don't know what it's called, it's just to separate the wires, because there's electricity up there.

High-voltage line post type porcelain insulator High-voltage line post type porcelain insulator line post insulator is a kind of steel insulator composed of one or more insulators permanently glued on a metal base, and sometimes a cap, and can be rigidly installed on the supporting structure with stud bolts or one or several bolts mounted on the metal base. It is used for insulation and support wires in AC power lines in ordinary areas and medium and heavily polluted areas with a nominal voltage higher than 1000V, a frequency not more than 100Hz, an altitude of no more than 1000m, and an ambient temperature of the installation site between -40 +40. Line (solid) column insulator can replace the pin insulator, the pin insulator is a B-type insulator, which is easy to break down and damage during operation, and the tempered glass insulator will self-break at this time, while the porcelain insulator will not self-break.

Therefore, the electric power sector has to spend a lot of manpower and material resources to carry out electrical testing and preventive tests on porcelain insulators, which has certain deficiencies in economic and safe power supply. Therefore, with the development of manufacturing technology, the emergence of line (solid) post insulators has been promoted. This kind of insulator has a solid insulator, which is a type A insulator, so there is no need to worry about breakdown along the inside of the insulator during operation, which is one of its major advantages.

Line post porcelain insulators are divided into eight grades of 325kv according to the rated lightning impulse withstand voltage value; According to the rated bending failure load value, it is divided into four grades; According to its installation mode, it is divided into two types: vertical installation and horizontal installation; According to the connection mode with the high-voltage wire, it is divided into two types: top lashing type and top wire clamp type; According to the connection between the steel foot and the base, it can be divided into two types: separable (threaded connection) and non-separable.

The small one is called an anti-vibration hammer. Destroy the inherent mechanical vibration frequency of the wire to prevent excessive vibration of the wire.

That's a set of ground wires.

According to your description, it is a grounding clamp, and the grounding 1 dissipates static electricity during line maintenance, and 2 can prevent the upper section from being misclosed.

The columns on the high-voltage line are porcelain vases. It has the following two functions:

1. In order to increase the surface length of the insulator and increase the insulation, (the resistance is proportional to the length), the insulator is designed to be wavy;

2. For the convenience of installation and use, the insulator is designed in the form of multiple beads, and the length and insulation performance can be adjusted by selecting the number at will.

This is a porcelain bottle, and most of the high-voltage distribution lines in the 10kV urban area use wires with insulating sheaths, but even if there is an insulating sheath, one or several porcelain bottles need to be used to insulate the poles or towers.

One is used to improve the distribution of high-voltage electric fields, that is, voltage equalization;

The second is to prevent corona discharge and even arc discharge on the surface of the high-voltage wire due to the high electric field strength.

The third is the anti-vibration hammer to prevent the wire from swinging.