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what is the breakdown voltage value in BDV test in
transformers?
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Answer Posted / nitin arora
It depends on the voltage rating of the transformer
IF transformer rating is less than 72 KV then minimum BDV should be 30 KV.
IF transformer rating is 72 to 170 KV then minimum BDV should be 40 KV.
IF transformer rating is more than 170 KV then minimum BDV should be 50 KV.
All above results are referring the 2.5 MM gap during test.
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