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    Insulation level in single-phase AC motor

     

    The insulation level in a single-phase AC motor refers to the heat-resistant grade of the insulating material thereof, points A, E, B, F, H-level. Allow temperature rise means that the temperature of the motor is raised as compared to the ambient temperature. Single-phase AC motor Temperature rose means that the single-phase AC motor is in the rated operating state, the temperature of the stator winding is higher (the ambient temperature is specified at 35 ° C or 40 ° C, if the specific value is not marked on the nameplate, it is 40 ° C) Insulation Temperature Grade A Class E Class B F Class H Class Allow temperature (° C) 105 120 130 155 180 Winding temperature rise limit value (k) 60 75 80 100 125 Performance reference temperature (° C) 80 95 100 120 145 In an electrical apparatus such as a single-phase AC motor, the insulating material is a weak link. Insulation materials are particularly susceptible to high temperature and accelerated aging and damage. Different insulating materials are different from the ability of electrical equipment with different insulating materials to withstand high temperatures. Therefore, the general electrical equipment specifies the high temperature of its work. According to the ability to withstand high temperatures according to different insulating materials, seven allowed high temperatures, which are: Y, A, E, B, F, H, and C. The allowable operating temperature of: Y, A, E, B, F, H, and C are respectively: 90, 105, 120, 130, 155, 180 and 180 ° C or higher. Therefore, the B-stage insulation is shown that the insulating heat resistant temperature adopted by the generator is 130 ° C. The user should ensure that the generator insulating material does not exceed this temperature in the generator to ensure the normal work of the generator. Insulation materials in the single-phase AC motor, the insulating material of the B stage is mainly made of mica, asbestos, glass wires, glued or impregnated with organic glue. Read more

     

     

     

     

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