Which of the following are the classes of insulating material in electrical machines?(a) Γ, A, E, F, H, C(b) Γ, E, B, F, H, C(c) A, E, B, F, H, C(d) Γ, A, E, F, CI have been asked this question by my school principal while I was bunking the class.The question is from Motors in section Rating and Heating of Motors of Electric Drives

Which of the following are the classes of insulating material in elect

1.	Which of the following are the classes of insulating material in electrical machines?(a) Γ, A, E, F, H, C(b) Γ, E, B, F, H, C(c) A, E, B, F, H, C(d) Γ, A, E, F, CI have been asked this question by my school principal while I was bunking the class.The question is from Motors in section Rating and Heating of Motors of Electric Drives
Answer» The correct answer is (a) Γ, A, E, F, H, C To elaborate: DEPENDING upon the temperature limits, insulating materials are classified into seven classes Γ, A, E, B, F, H, C. The insulation has the lowest temperature limit.

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