A 10-kVA, 4800:240-V, 60-Hz, single-phase transformer has an equivalent series impedance of 120 + j300 Ω 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.