Question: Consider the 8-kV: 78-kV, 50-MVA transformer of Problem 2.15 connected as an autotransformer. a. Determine the voltage ratings of the high- and low-voltage windings for

Consider the 8-kV: 78-kV, 50-MVA transformer of Problem 2.15 connected as an autotransformer.

a. Determine the voltage ratings of the high- and low-voltage windings for this connection and the kVA rating of the autotransformer connection.

b. Calculate the efficiency of the transformer in this connection when it is supplying its rated load at unity power factor.

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