Three single-phase two winding transformer, each rated at 10 MVA, 66, 4/12.5 KV,

Question

Three single-phase two winding transformer, each rated at 10 MVA, 66, 4/12.5 KV, 60 Hz, with an equivalent series reactance of 0.12 are connected to form a three-phase bank. The High-voltage side windings are connected in Y. A three-phase load operating under balanced condition on the high-voltage side receives 450 MVA at 0.6 lagging, with V_AN = 66/0 degree KV. Determine the voltage V_an at the low-voltage side if the low-voltage winding are connected In Y In Delta The bas equantities of the transformer are: S_base = 600 MVA, V_based = 175 KV.

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