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Insulation Grade Of Transformer
- Jul 27, 2017 -

What is the insulation grade of the transformer?

The insulation grade of the transformer is not the concept of the insulation strength, but the standard of allowable temperature rise, that is, the insulation grade refers to the heat-resistant grade of the insulating material used, which is divided into a, E, B, F, H class. Insulation temperature level is divided into a class E Class B Class F class H.

So how do all parts of the insulation classification?

Each insulation grade specific allowable temperature rise standard is as follows:

Maximum allowable temperature (℃) 105 120 130 155 180

Ceiling value of winding temperature (k) 60 75 80 100 125

Performance reference temperature (℃) 80 95 100 120 145