Question 1: What are the materials of electrical insulation Electrical insulation materials include wood, cotton, paper, oil-based paint, asphalt paint, polyester film, glass cloth, mica, glass fiber, asbestos, composite silicone organic penalty ester paint, quartz, glass, electroporcelain materials.
Question 2: What are the commonly used electrical insulation materials? Guangzhou Donghao electrical insulation materials commonly found insulating materials are: 3240 epoxy board, epoxy rod, epoxy tube, FR-4 board, SMC board, bakelite board, diphenyl ether board, silicone board, cold stamping board, PC board, PC endurance board, PC sunshine board, acrylic board, plexiglass board, PVC board, POM board, PP board, mica board, insulating cardboard, fast bus paper, PB paper, red steel paper, cable paper, wrinkle paper, telephone paper, composite paper, green shell paper, DMD/DM insulating paper, yellow wax pipe, heat shrinkable sleeve, Acrylate tube, self-extinguishing tube, alkali-free tape, white cloth tape, white gauze tape, R-type poly-jacket flexible ester tape, non-weft tape, yellow wax ribbon, F46 tape, polyester tape, PET polyester film, polyimide film, MC nylon board, PA6 nylon rod, insulating paint, solvent, tianna water, industrial wool felt and other insulation materials and engineering plastics.
Question 3: What are the commonly used insulation materials? What are the main uses? The insulation materials commonly used by electricians can be divided into inorganic insulation materials, organic insulation materials and mixed insulation materials according to their different chemical properties. Commonly used inorganic insulation materials are: mica, asbestos, marble, porcelain, glass, sulfur, etc., mainly used as winding insulation for motors and electrical appliances, base plate and insulator for switches, etc. Organic insulation materials include: shellac, resin, rubber, cotton yarn, paper, linen, rayon, etc., most of which are used to manufacture insulating paint, winding wire coated insulation, etc. Hybrid insulation materials are various molded insulation materials made by processing the above two materials, and are used as the base, shell, etc. of electrical appliances.
Application of insulation materials
The function of insulating materials is to isolate the live parts with different potentials in electrical equipment. Therefore, the insulation material should first have high insulation resistance and withstand voltage strength, and avoid accidents such as leakage and breakdown. Secondly, the heat resistance should be good to avoid aging and deterioration due to long-term overheating; In addition, it should also have the characteristics of good thermal conductivity, moisture resistance and lightning resistance, high mechanical strength and convenient processing. According to the requirements of the description, the performance indicators of commonly used insulation materials include dielectric strength, tensile strength, specific gravity, expansion coefficient, etc.
Insulation withstand voltage strength: the higher the voltage applied at both ends of the insulator, the greater the electric field force of the charge in the material, and the more likely it is to ionize collision, resulting in insulator breakdown. The minimum voltage that breaks down an insulator is called the breakdown voltage of this insulator. When the 1 mm thick insulation material breaks down, the voltage kilovolts that needs to be added is called the insulation withstand voltage strength of the insulation material, referred to as the insulation strength. Because insulating materials have a certain dielectric strength, all kinds of electrical equipment, all kinds of safety equipment (electrician pliers, electric pen, insulating gloves, insulating rods, etc.), various electrical materials, manufacturing plants have stipulated a certain allowable voltage, called rated voltage. The voltage it is subjected to during use shall not exceed its rated voltage value to avoid accidents.
Tensile strength: The tensile force that the insulation material can withstand per unit cross-sectional area, for example, glass can withstand a tensile force of 1400 Newtons per square centimeter of cross-sectional area.
The insulation properties of insulating materials are closely related to temperature. The higher the temperature, the worse the insulation properties of the insulating material. In order to ensure the dielectric strength, each insulation material has an appropriate maximum allowable operating temperature, below which it can be used safely for a long time, beyond which it will age rapidly. According to the degree of heat resistance, the insulation materials are divided into Y, A, E, B, F, H, C and other grades. For example, the maximum allowable working temperature of Class A insulation materials is 105 °C, and most of the insulation materials in distribution transformers and motors generally used belong to Class A.
Question 4: What is insulation? Materials that do not conduct electricity are called insulating materials
Question 5: What material is the electrical insulation board made of According to the different uses of the insulation board, different materials are used. For example: polyvinyl chloride board, epoxy resin board, paper offset plate, cloth rubber plate, bakelite board, various resin boards... Wait.
Question 6: What are the categories of commonly used insulation materials The insulation materials are electrical insulation materials. According to the national standard GB2900.5, the definition of insulation material is: "a material used to make the device electrically insulated". That is, materials that can block the passage of electric current.
Classification method of insulation material products
China's machinery industry standard JB/T2197-1996 has classified and named insulation material products, and specified the model compilation method. The standard divides insulation materials into eight categories, each category is represented by a single *** number, and the class code is specifically classified in the first digit of the product model as shown in Table 1
First, electrical insulation products are divided into four categories: large categories, small categories, varieties and specifications.
Second, electrical insulation material products are divided into large categories according to application or process characteristics, and are represented by numbers:
1 - lacquer, resin and glue 5 - mica products
2--Impregnated fiber products 6--Film, adhesive tape and composite products
3 - laminate products 7 - fiber products
4 - Plastics 8 - Insulating liquids
Third, the second digit represents the subclass of the large category:
1 Paints, resins and glues:
0. Solvent-impregnated paint 1. Solvent-free impregnated paint 2. Covering paint
3. Enamel 4. Adhesive paint, resin 5. Deposition powder
6. Silicon steel sheet paint 7. Enameled wire 8. Glue
2 Impregnated fiber products:
0. Cotton fiber lacquer cloth 2. Lacquer silk 3. Synthetic fiber lacquer cloth
4. Glass fiber paint cloth 5. Mixed fiber paint cloth 6. Anti-corona paint cloth
7. Paint pipe class 8. Lashing belt class
3 Laminated products:
0. Organic substrate laminate 2. Inorganic substrate laminate 3. Anti-corona and magnetic conductive laminate
4. Copper-clad laminate 5. Organic substrate laminated pipe 6. Inorganic substrate laminated pipe
7. Organic substrate laminated rods 8. Organic substrate laminated rods
4 Plastics:
0. Wood powder filler plastic 1. Other organic matter filler plastic 2. Asbestos filler plastic
3. Glass fiber filler plastic 4. Mica filler plastic 5. Other mineral filler plastics
6. Filler-free plastics
5 Mica products:
0. Mica tape class 1. Soft mica board class 2. Plastic mica board class
4. Mica tape class 5. Commutator mica plate class 7. Liner mica plate class
8. Mica foil 9. Mica tube
6 Films, adhesive tapes and composite products:
0. Film 2. Film adhesive tape 3. Rubber and fabric adhesive tape
5. Film insulation paper and film glass paint cloth composite foil 6. Film synthetic fiber composite foil 7. A variety of material composite foil
Fourth, the large and small category numbers of electrical insulation materials are taken from 0 to 9 with 10 numbers, of which the vacant number is used for future product types and the emergence of new materials.
Fifth, the basic unit of electrical insulation materials is a variety, and the main components and basic processes of the same variety of products are the same.
Sixth, electrical insulation material products can be according to the size (thickness. Diameter. Length. width, etc.), the specifications are divided within the variety.
Question 7: What is the best insulation material'? Materials with good electrical or thermal insulation. Thermal insulation materials are also known as thermal insulation materials. Insulating materials mostly refer to electrical insulating materials, and their conductivity is about 10-10 west/meter below. According to the needs of different electrical products, it also plays the role of energy storage, heat dissipation, cooling, arc extinguishing, moisture-proof, mildew-proof, anti-corrosion, anti-irradiation, mechanical support and fixation, and protection of conductors.
The earliest insulation materials used were cotton, silk, mica, rubber and other natural products. After the 30s of the 20th century, synthetic insulation materials developed rapidly, and various synthetic resins, plastics, etc. were successively used in the field of electrical engineering to manufacture motors and high and low voltage electrical appliances, so that the capacity of electrical products continued to expand and the volume gradually decreased, thereby promoting the development of electrical and electronic technology.
Insulating materials, divided into gas, liquid and solid 3 categories.
Gas insulating materials have high ionization field strength and breakdown field strength, can quickly restore insulation performance after breakdown, good chemical stability, non-combustible, non-explosive, non-aging, non-corrosive, not easy to be decomposed by discharge, and large specific heat capacity, good thermal conductivity and fluidity. Air is the most widely used gas insulation material. For example, the overhead conductors of AC and DC transmission lines, and the overhead conductors are insulated by air. High-voltage standard capacitors also use gas-insulated media, and in the early days, high-pressure nitrogen or carbon dioxide were used, and sulfur hexafluoride (SF6) is now used. SF6 is also used in the manufacture of high-voltage circuit breakers, metal-enclosed electrical combinations, gas-insulated transmission pipeline cables and gas-insulated transformers.
Liquid insulating materials are also known as insulating oil. Fill the voids inside or between the poles of solid materials to improve their dielectric properties and improve the heat dissipation capacity of the device. The liquid insulation material has high breakdown strength, small dielectric loss tangent (tgσ), high insulation resistivity, and small relative permittivity. In addition, it also has excellent physical and chemical properties, such as high gasification temperature, high flash point, low freezing point, large thermal conductivity, good thermal stability, and small inspiration under the action of electric field. According to its polarity, it is divided into four categories: weak polarity, non-polarity, polarity and strong polarity. According to the source of materials, it is divided into three categories: mineral insulating oil, synthetic insulating oil and vegetable oil. Mineral insulating oil, referred to as mineral oil, is refined from petroleum and belongs to a weakly polar medium. Its relative permittivity is about 2.2, and the breakdown voltage in the standard electrode is 35~50 kilovolts (kV). The flash point is 125~135 °C, which is used to manufacture transformers, cables, capacitors, etc. Synthetic insulating oil is a synthetic liquid insulating material. Because mineral oil is a mixture of a variety of hydrocarbons, it is difficult to remove the components that reduce the insulation performance, and the preparation process is complex, easy to burn, low heat resistance, and the dielectric constant is not high, so the synthetic insulating oil with excellent performance has been researched and developed. Now the use of aromatic synthetic oil, silicone oil, ester oil, ether and sulfone synthetic oil, polybutene, etc. Vegetable oils are used in castor oil, soybean oil, rapeseed oil, etc. Among them, castor oil is an excellent impregnating agent for pulse capacitors
Question 8: What are the electrical materials? Instrumentation belongs to electrical materials!
Question 9: What are the insulation materials? Class 1 paint resin
Class 2 lacquered cloth, lacquer 3 Laminate/molded board, rod, tube
Class 4 General engineering plastics
Class 5 mica tape, plate, foil, tube, paper
Class 6 films, all composite products
Class 7 electrician non-woven fabrics
