Question: A balanced three-phase transformer bank with the Î -Y connection depicted in Fig. 13.137 is used to step down line voltages from 4,500 V rms

A balanced three-phase transformer bank with the Î” -Y connection depicted in Fig. 13.137 is used to step down line voltages from 4,500 V rms to 900 V rms. If the transformer feeds a 120-kVA load, find:
(a) The turns ratio for the transformer,
(b) The line currents at the primary and secondary sides.

500 V 900 V 42 kVA Three-phase load

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