Problem 6: The resistances and leakage reactances of a 75 kVA, 60 Hz, 7970V/240V distribution transformer are: R₁ 3.39 a

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Problem 6 The Resistances And Leakage Reactances Of A 75 Kva 60 Hz 7970v 240v Distribution Transformer Are R 3 39 A 1 (21.29 KiB) Viewed 43 times

Problem 6: The resistances and leakage reactances of a 75 kVA, 60 Hz, 7970V/240V distribution transformer are: R₁ 3.39 and R₂ = 0.00537 X₁ = 40.6 and X₂ = 0.03917 Each referred to its own side. The magnetizing reactance: Xm 114 kn and R₂ = 50 kn = The subscript 1 denotes the 7970-V winding and subscript 2 denotes the 240-V winding. Each quantity is referred to its own side of the transformer. A load of 0.768 2 at a power factor of 0.85 lagging is connected to the low- side terminal. If the rated voltage is applied at the primary, find the copper loss, the core loss and the efficiency of the transformer.