Find the equivalent series impedance, Electrical Engineering

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Q. 10-kVA, 4800:240-V, 60-Hz, single-phase transformer has an equivalent series impedance of 120 + j300 referred to the primary high-
voltage side. The exciting current of the transformer may be neglected.

(a) Find the equivalent series impedance referred to the secondary low-voltage side.

(b) Calculate the voltage at the primary high voltage terminals if the secondary supplies rated secondary current at 230 V and unity power factor.

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