Class B vs F

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niupnos

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Hi members ,
In discussing insulation classes , what are the typical motor / generator ratings where in we use class B insulation /class F insulation?
I am doing a study on the potential for class b and class f insulation materials in India?
Could any one suggest some ways to arrive at a reasonable estimate?
Also my understanding is that any particular component in an insulation system cannot be specified by a class , but the insulation system as a whole could be specified by a class.
Is it correct?

Lets take poly fleece for an example?
It could be part of a composite polyfleece/poly film/poly fleece that could either be class B or class F?
Hence can we clasify poly fleece as of any class?
 
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