According to the ability of different insulating materials to withstand high temperatures, seven allowable maximum temperatures are specified for them. They are arranged according to the temperature: Y, A, E, B, F, H and C. Their allowable working temperatures are: 90, 105, 120, 130, 155, 180 and above 180°C.
Class B insulation indicates that the heat-resistant temperature of the insulation used in the generator (motor) is 130°C. When the generator is working, the user should ensure that the insulation material of the generator does not exceed this temperature to ensure the normal operation of the generator.
Extended information:
Classification of motor working systems:
< p>S1, continuous working system: the operating time under constant load is sufficient to achieve thermal stability.S2. Short-time working system: Run for a given time under constant load. This time is not enough to achieve thermal stability, and then the power is cut off and stopped for enough time to allow the motor to cool down again to the cooling medium. The temperature difference is within 2K.
S3. Intermittent cycle working system: operates according to a series of identical working cycles. Each cycle includes a period of constant load operation time and a period of power-off and shutdown time. The starting current of each cycle in this working system will not have a significant impact on the temperature rise.
S4. Intermittent cycle working system including starting: It operates according to a series of identical working cycles. Each cycle includes a starting time that has a significant impact on temperature rise, a constant load operating time and an intermittent period. Can stall time.
S5. Intermittent cycle working system including electric braking: operates according to a series of identical working cycles. Each cycle includes a starting time, a constant load running time, a rapid electric braking time and A period of power-off and stalling time. ?
S6. Continuous cycle working system: operates according to a series of identical working cycles. Each cycle includes a period of constant load operation time and a period of no-load operation time, but no interruption time.
S7. Continuous cycle working system including electric braking: operates according to a series of identical working cycles. Each cycle includes a starting time, a constant load operating time and a rapid electric braking time, but No downtime.
Baidu Encyclopedia - Motor Insulation Level
Baidu Encyclopedia - Insulation Level