Problem 2 A 600-KVA, 34.5kV/6.6kV, 60-Hz, single-phase step-down transformer has a core-loss equivalent resistance of 7

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Problem 2 A 600 Kva 34 5kv 6 6kv 60 Hz Single Phase Step Down Transformer Has A Core Loss Equivalent Resistance Of 7 1 (69.32 KiB) Viewed 14 times

Problem 2 A 600-KVA, 34.5kV/6.6kV, 60-Hz, single-phase step-down transformer has a core-loss equivalent resistance of 7 k2 and a magnetization reactance of 5.5 kq. The equivalent winding total impedance as referred to the primary side is 34 + j115.7 12. Using the approximate equivalent circuit, 1) Determine the transformer efficiency and voltage regulation when it operates at 75% of rated load with a power factor of 0.8 lagging. 2) Calculate the load at maximum efficiency and the maximum efficiency of the transformer for the load power factor of 0.8 lagging.