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  1. Chap79

    NER on delta-star transformer

    I'm currently designing an NER for a delta star transformer. It is a 3500kVA, 11kV/6.6kV transformer (Ifault = 308A). I've calculated the required values. It however varies between 30ohm (127A) and 127ohm (30A). My question is do I go for the lower current or the higher 1? I know that a low...

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