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Q3 There are 2 transformers in series in a 3-phase supply system with the following ratings:...

Q3 There are 2 transformers in series in a 3-phase supply system with the following ratings: 66/33 kV, 15 MVA (T1) and 33/6 kV, 5 MVA (T2). The leakage impedances given in the name plates are: 7% for T1 and 6% for T2. Find their combined per unit impedance (assuming a suitable base MVA) and the fault MVA and the fault current at the 6 kV terminals of T2

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