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        What is motor insulation?


        Motor insulation systems are the materials used for wire and coil insulation and are classified according to the highest temperature at which normal service life can be expected. There are five motor temperature classifications: A (1050 C), E (1200 C), B (1300 C), F (1550 C) and H (1800 C). The maximum temperature rating is based on the temperature rise of the coil winding plus the ambient air temperature at the motor.


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