Three single- phase transformers are each rated 460 V/ 13.2 kV 400 kVA, 5% short - circuit reactance. The three single - phase transformers are connected as a three - phase Y – Y transformer. A bank of three - phase Y connected resistive load of 30 Ω is connected to the low - voltage side of the transformer using a feeder with resistance of 1 + j10 Ω .

Perform the following:

i) Compute the three - phase Y – Y transformer high - voltage - side and low - voltage - side voltage and kVA ratings.

ii) Compute and draw per unit model of the three - phase transformer.

iii) Give the three phase equivalent model of entire mode with actual values

iv) Give a one line diagram of circuit with actual values

v) Compute and draw the per unit model based on transformer rating