Insulation Materials Performance Is Better
Electrician commonly used insulating materials according to their different chemical properties, Insulation Materials can be divided into inorganic insulation materials, organic insulation materials and mixed insulation materials. Commonly used inorganic insulation materials are: mica, Insulation Materials asbestos, marble, porcelain, glass, sulfur, etc., mainly used for motors, electrical insulation winding, switch the bottom plate and insulators. Organic insulating materials are: shellac, resin, rubber, cotton yarn, paper, linen, rayon, etc., mostly used to manufacture insulating paint, Insulation Materials winding wire wound insulation and so on. Mixed insulation materials for the above two kinds of materials from the processing of various molding insulation materials, used as electrical appliances of the base, shell and so on.
The role of high temperature insulation material is in the electrical equipment to the potential of different charged part of the isolated. Therefore, the insulation material should first have a high insulation resistance and pressure strength, and to avoid leakage, breakdown and other accidents. Second, Insulation Materials the heat resistance is better, to avoid long-term overheating and aging deterioration; In addition, there should be good thermal conductivity, resistance to lightning and high mechanical strength and ease of processing and so on. According to the above requirements, commonly used insulating material performance indicators are insulation strength, Insulation Materials tensile strength, specific gravity, expansion coefficient.
Ordinary high temperature insulating material insulation performance and temperature are closely related. The higher the temperature, the worse the insulating properties of the insulating material. In order to ensure the insulation strength, each insulating material has an appropriate maximum allowable operating temperature, below this temperature, can be used for a long time safe, more than this temperature will quickly aging.Insulation Materials According to the degree of heat, the insulation material is divided into Y, A, E, B, F, H, C and other levels. For example, A-class insulation material of the maximum allowable working temperature of 105 ℃, Insulation Materials the general use of distribution transformers, motor insulation materials are mostly A-level.
Ordinary insulation materials generally bear high temperature capacity is limited, organic materials more than 200 ℃ above, will occur softening damage, loss of insulation effect, Insulation Materials inorganic insulation such as mica film need to use the winding method, resulting in a lot of construction inconvenience, is not conducive to large area use.