Three identical single-phase transformers, each rated 1.2 kV /120 Y, 7.2 kV A and having a… 1 answer below »

Three identical single-phase transformers, each rated 1.2 kV /120 Y, 7.2 kV A and having a leakage reactance of 0.05 per unit, are connected together to form a three-phase bank. A balanced Y -connected load of 5Ω per phase is connected across the secondary of the bank. Determine the Y-equivalent per-phase impedance (in ohms and in per unit) seen from the primary side when the transformer bank is connected  

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