As one of the indispensable components in the power system, insulators play an important role in the operation of the modern power grid. They are used in high-voltage transmission lines and substations to isolate electrical equipment from the ground and avoid the danger of electric shock and fire caused by their direct contact. This article will introduce the type and structure of insulator.

Insulators can be divided into three types: glass insulators, porcelain insulators and composite insulators. Among them:

1. Glass insulator: borosilicate glass as the main raw material, the use of drawing, pressing and molding process. It is characterized by light weight, high strength, good insulation, not easy to break, pollution resistance flash breakdown strength.

2. Porcelain insulator: made of mineral clay, its structure is relatively close, and has good mechanical strength and electrical heat resistance. It is characterized by heavy weight, high strength, high temperature resistance, and very little pollution.

3. Composite insulator: composed of porcelain body and insulating material. In addition to high strength, high voltage resistance, high resistance to electrical breakdown performance, but also to adapt to the complex and changing environment, improve operational reliability, so widely used in modern power grid.

The structure of the insulator consists of an insulator and a metal component. Among them, the insulator is usually made of porcelain, glass and other materials, and has various shapes, such as vase type, cap type, etc., and is connected to the line or equipment through metal parts. The metal parts are usually made of bolts, parent iron, etc., which can bear the weight and anti-toppling force of the insulator.

In short, as a vital part of the power system, insulators carry the important task of isolating electrical equipment from the ground, and play a key role in the operation of the power grid. Therefore, when using insulators, we should choose the appropriate model and material according to the needs, and strengthen the maintenance and maintenance work, improve the operation safety and reliability of the power system, and realize the safe transmission of electric energy.