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Q#1 Transformers GATE EE 1998 MCQ +2 marks -0.66 marks

In a 50 KVA, 11 KV/400V transformers, the iron and copper losses are 500W and 600W respectively under rated conditions. Calculate the efficiency on unity power factor at full load. Find the load for maximum efficiency and the iron and copper losses corresponding to this load.

Iron Loss = 500W, Copper Loss = 500W , Load for maximum efficiency = 45.65 kVA

Iron Loss = 500W, Copper Loss = 500W , Load for maximum efficiency = 55.65 kVA

Iron Loss = 500W, Copper Loss = 1000W , Load for maximum efficiency = 55.65 kVA

Iron Loss = 1000W, Copper Loss = 500W , Load for maximum efficiency = 45.65 kVA

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