AutoTransformer Question - Electrical - Engineer Boards
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AutoTransformer Question

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Ideal 25kVA 480/120V 1PH transformer is to be used as an autotransformer supplying load from a 480V source


If it is in Buck mode, and the coils are carrying rated current, the max KVA load the transformer can accomodate is?


75kVA answer

I came up with 100kVA


Is somehow "coils carrying rated current" the key?  Or is the answer a mistake?

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