Question: A 5 0 0 0 - kVA, 3 , 3 0 0 / 4 1 5 - V , 3 - phase transformer is star

A 5000-kVA, 3,300/415-V,3-phase transformer is star-connected on the high voltage side and delta-connected on the low-voltage side. Determine its % resistance and % reactance drops, % efficiency and % regulation on full-load 0.8 p.f. leading given the following data:
S.C. test; H.V. data: 415V,165 A and 19kW
O.C. test; L.V. data: 415V,145 A and 17kW

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