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What is 7.2kV Transformer BIL Ratings Explained about?

The document discusses the differences in insulation levels, or basic insulation levels (BIL), for various types of electrical equipment used in 6.9kV systems. Equipment closer to the utility source, like transformers and circuit breakers, require higher BIL ratings of 95kV and 110kV since they have more exposure to lightning. Equipment further downstream like switchgear and motors have lower BIL requirements of 95kV and 26.2kV since they are more protected from surges. Dry type transformers also have a low

Author

Peter Dyck

Language

EN