What are the performance indicators of insulating materials?

What are the performance indicators of insulating materials?

 

Good Quality Low Thermal Conductivity Glass Wool Insulation.jpgMaterials with a resistivity greater than 10 and a power of 9 Ω.cm are electrically known as insulating materials. The function of the insulating material is to isolate the dotted portions of different potentials in the electrical equipment. Therefore, the insulating material should have good dielectric properties, that is, have high insulation resistance and compressive strength, and can avoid accidents such as electric leakage, creepage or breakdown. Secondly, the heat resistance is better, especially in the performance change which is not caused by long-term heating; in addition, it has good thermal conductivity, moisture resistance, high mechanical strength and convenient processing.


Performance indicators of electrical insulation materials commonly used by electricians such as insulation strength, tensile strength, specific gravity, and expansion coefficient. In the electric field, the insulating material breaks down when the electric field strength increases to a certain limit. The electric field strength of this dielectric breakdown is called the dielectric withstand strength. Class F insulation materials are mica products reinforced with organic fiber materials, glass and asbestos, glass wool, laminates based on glass cloth and asbestos fibers. Inorganic materials are used as reinforcing and stone-reinforced mica powder products. A polyester or alkyd material with good stability and a composite silicone organic polyester paint.


H-class insulation material is not reinforced or inorganic material-reinforced mica products, thickened F-grade materials, composite mica, silicone mica products, silicone organic lacquer silicone organic rubber polyimide composite glass cloth, composite film, poly Imide paint, etc.