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A three-phase Y-A transformer is rated 225-kV:24-kV, 400 MVA and has a single-phase equivalent series reactance of 6.08 ? as referred to its high-voltage terminals. The transformer is supplying a load of 375 MVA at 0.89 power factor leading at a voltage of 24 kV (line to line) on its low-voltage side. It is supplied from a feeder whose impedance is 0.17 +/2.2 ? connected to its high-voltage terminals. For these conditions, calculate (a) the line-to-line voltage at the high- voltage terminals of the transformer and (b) the line-to-line voltage at the sending end of the feeder

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31s MVA (24TozIA line value phose value hS20% 214 feeder Viph Viph 24k 22 Sk primary veltage Iph Vphh+ a l primary drop V(RCo

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