Insulation class OR insulation level - Solutions - Huaqiang Electronic Network

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The insulation grade of the motor refers to the heat resistance grade of the insulating material used, and is classified into A, E, B, F, and H grades. Allowable temperature rise is the limit at which the temperature of the motor rises compared to the ambient temperature.
Insulation temperature class A grade E grade B grade F grade H grade maximum allowable temperature (°C) 105 120 130 155 180
Winding temperature rise limit (K) 60 75 80 100 125
Performance reference temperature (°C) 80 95 100 120 145
In electrical equipment such as generators, insulation is the weakest link. Insulating materials are particularly susceptible to high temperatures that accelerate aging and damage. Different insulating materials have different heat resistance, and electrical equipment with different insulating materials has different ability to withstand high temperatures. Therefore, general electrical equipment specifies the maximum temperature at which it operates.
According to the ability of different insulating materials to withstand high temperature, the maximum allowable temperature of 7 is specified. According to the temperature, they are arranged as follows:
Temperature class Y grade A grade E grade B grade F grade H grade C grade allowable operating temperature (°C) 90 105 120 130 155 180 180 ° C or more Therefore, Class B insulation indicates that the generator uses an insulation heat resistance temperature of 130 °C. When the generator is working, the user should ensure that the generator insulation material does not exceed the temperature to ensure the normal operation of the generator.
Insulation grade B grade insulation material, mainly made of mica, asbestos, glass filaments glued or impregnated with organic glue.

****What is insulation material ****
Insulation materials commonly used by electricians are classified into inorganic insulating materials, organic insulating materials and mixed insulating materials according to their chemical properties. Commonly used inorganic insulating materials are: mica, asbestos, marble, porcelain, glass, sulfur, etc., mainly used as winding insulation for motors and electrical appliances, bottom plates and insulators for switches. Organic insulating materials are: shellac, resin, rubber, cotton yarn, paper, hemp, rayon, etc., mostly used to make insulating varnish, coated insulation of winding wires, etc. The hybrid insulating material is a variety of molded insulating materials which are processed by the above two materials, and are used as a base, an outer casing, and the like of an electric appliance. )

Insulation level insulation level is the level at which electrical equipment can withstand various overvoltages and long-term maximum working voltages in operation. It is necessary to correctly handle various voltages (including operating voltage and various overvoltages) acting on the insulation, and various limits. The relationship between pressure measures and insulation strength.