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What is BIL and how does it apply to transformers?

April 26, 2017BIL transformers

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What is BIL and how does it apply to transformers?

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10 Posted

BIL is an abbreviation for Basic Impulse Level. Impulse tests are dielectric tests that consist of the application of a high frequency steep wave front voltage between windings, and between windings and ground. The BIL of a transformer is a method of expressing the voltage surge that a transformer will tolerate without breakdown.