What are the main types of insulating materials?

A material used in electrical equipment to isolate a charged body from other parts. Commonly used solid materials are insulating sleeves. Insulating paper, laminates, erasers, plastics, paints, glass, ceramics, mica, etc.

Commonly used liquid materials are transformer oil, etc. In gaseous materials, air, nitrogen, sulfur hexafluoride and so on are used more.

Insulating material: resistivity 109 1022

The material composed of cm is called an insulating material in electrical technology, also known as a dielectric. Simply put, it is a material that isolates a charged body from other parts. The insulating material has a very large resistance to the DC current, under the action of the DC voltage, except for a very small surface leakage current, it is actually almost non-conductive, and for the AC current, there is a capacitive current passing through, but it is also considered to be non-conductive.

The greater the resistivity of the insulating material, the better the insulating properties.

Insulating materials are also known as dielectrics. In layman's terms, an insulating material is a material that is able to block the passage of electric current through it, i.e. no.

Conductive materials. Commonly used insulating materials are: gas: such as air, sulfur hexafluoride, etc.

Liquids: such as transformer oil, cables.

oil, capacitor oil, etc.;

Solid materials: including two categories, one is inorganic insulating materials, such as mica, asbestos, electric porcelain, and glass.

glass, etc., and the other category is organic substances, such as paper, cotton yarn, wood, plastic, etc.

Insulating materials are materials that are effective in blocking the flow of electric current, and they are widely used in the field of electrical and electronic engineering. Here are some common types of insulation:

Plastics: Plastics such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyimide are commonly used insulating materials. They have good mechanical properties, chemical stability, and electrical insulating properties.

Rubber: Natural rubber, styrene-butadiene rubber, silicone rubber and other rubbers are also common insulating materials. They have good flexibility and heat resistance.

Glass: Glass is an excellent insulating material that can be used in high-temperature and high-pressure environments. Different kinds of glass have different insulating properties.

Ceramic: Ceramic is a hard, high-temperature insulating material that is widely used in electronic components.

Paper: Paper is also a common insulating material, mainly used in low-voltage electrical equipment.

Air: Air can also be used as an insulating material, for example in high-voltage transmission lines, where the air around the line forms an insulating layer to prevent current leakage.

1. According to the degree of heat resistance, the insulating materials are divided into 7 levels, such as Y, A, E, B, F, H, and C: Y grade insulation temperature resistance 90

1. Class A insulation temperature resistance 105

2. Class E insulation temperature resistance 120

3. Class B insulation temperature resistance 130

4. Class F insulation temperature resistance 155

5. H-grade insulation temperature resistance 180

6. Class C insulation temperature resistance above 200.

There is a close relationship between the insulation grade and the temperature resistance of the insulation, because the higher the temperature, the worse the insulation performance of the material. Therefore, different grades of insulation have a maximum permissible operating temperature, within which they can be safely used.

It should be noted that if the working temperature of the insulating material exceeds the insulating heat-resistant temperature, then the insulating material will age rapidly, so that it cannot be used, and may also cause safety hazards. Therefore, consumers must pay more attention when using it.

2. There are many types of insulating materials, which are generally divided into three categories: gas, liquid and solid.

1. Gas insulating materials: air, nitrogen, sulfur hexafluoride.

2. Liquid insulating materials: mineral insulating oil, synthetic insulating oil.

3. Solid insulating materials, organic solid insulating materials: glue, paper, fiber products, plastics, rubber, composite products and adhesive tapes, etc. Inorganic solid insulating materials: glass, ceramics and their products.

Relatively speaking, there are more solid insulation materials in life, and they are more complex.

Custom insulating sheet, findBoding PlasticsCommonly used insulating materials are divided into three categories: Inorganic insulating materials: mica, porcelain, asbestos, marble, glass, sulfur, etc.

It is used for winding insulation of motors and electrical appliances, switch base plates and insulators, etc. Organic insulating materials: rubber, resin, shellac, cotton yarn paper, hemp, silk, rayon tube, etc.

It is used in the manufacture of insulating varnish, outer insulation of winding wires, etc. Hybrid Insulating Material: A molded insulating material that is processed from two insulating materials.

The role of insulation:

1) Insulate the conductor and other parts.

2) Separate conductors with different potentials.

3) Provide the conditions for capacitor energy storage.

4) Changing the potential gradient in the high-voltage electric field.

5) Some insulating materials also play the role of mechanical support and fixation, moisture and mildew resistance.

Classification: According to the chemical composition, it can be divided into: inorganic insulating materials and organic insulating materials.

According to the physical state, it can be divided into: gas insulating materials, liquid insulating materials and solid insulating materials.

Insulating materials are resistant to chemical attack, shiny, partially transparent or translucent, most of them are good insulators, light weight and strong, easy to process and can be produced in large quantities, cheap, widely used, effective, easy to color, part of high temperature resistance, storage goods can play a moisture-proof effect Plastics are also divided into general-purpose plastics and engineering plastics, mainly defined by the wide range of uses, such as PE, PP** cheap, can be used in a variety of different types of machines to produce. Engineering plastics are more expensive, but the stability of raw materials and physical properties are much better, generally speaking, they have both rigidity and toughness.

Insulation materials include gas insulating materials, liquid insulating materials, and solid insulating materials. Gas insulating materials: dry gases at room temperature and pressure have good insulation properties.

Gas dielectrics, which are insulating materials, also need to meet the requirements in terms of physical and chemical properties and economy. Air and sulfur hexafluoride gas are commonly used gas insulating materials. Air has good insulation properties, and its insulation properties can be automatically restored instantaneously after breakdown, and the electrical and physical properties are stable, extremely rich, and have a wide range of applications.

Liquid insulating materials: insulating oils include natural mineral oil, natural vegetable oil and synthetic oil. Natural mineral oil is widely used, it is a neutral liquid obtained from petroleum ** after different degrees of refining and refining, golden yellow, with very good chemical stability and electrical stability.

Solid insulating materials: there are many types of dismantling materials, with excellent insulation properties and wide applications in power systems. Commonly used solid insulating materials are:

Insulating paint, insulating glue, fiber products, rubber, plastic and its products, glass, ceramic products, Yunhe Changmu, asbestos and its products, etc.

1. Gas: such as air, sulfur hexafluoride, etc.

2. Liquid: such as transformer oil, cable oil, capacitor oil, etc.

3. Inorganic insulating materials: such as polyimide film, mica, mica board, asbestos, porcelain, marble, glass, etc. It is mainly used as winding insulation for motors and electrical appliances, base plates and insulators for switches.

4. Organic insulating materials: such as paper, resin, rubber, rayon, cotton yarn, wood, plastic, etc. Most of them are used to make insulating varnishes, covered insulators for winding wires, etc.

5. Hybrid insulating materials: various molding insulating materials made from the above two materials after processing, which are used as the base and shell of electrical appliances.