Determine its kva rating as an autotransformer

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Reference no: EM131266030

A 400/100 V, 10 kVA, 2-winding transformer is to be employed as an autotransformer to supply a 400 V circuit from a 500 V source. When tested as a 2-winding transformer at rated load, 0.85 pf lagging, its efficiency is 0.97%.

(a) Determine its kVA rating as an autotransformer.

(b) Find its efficiency as an autotransformer.

Reference no: EM131266030

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