A 440120 15 kW two winding transformer with a leakage impeda

A 440-120, 15 kW, two winding transformer with a leakage impedance of 0.04+j0.0 efficiency of 95% when it delivers half of rated current at 0.8 power factor lagging. Transformer is to be connected as an autotransformer to a 560 V source to supply a For this autotransformer determine: The kVA rating of the autotransformer. Find the transformed and conducted The efficiency at half-load and 0.8 PF lagging. The input current when the load is shorted.

Solution

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