B1. An electrical engineer tested a 50 kVA, 1000/250 V, 50 Hz, single-phase transformer, and the test results are given

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B1 An Electrical Engineer Tested A 50 Kva 1000 250 V 50 Hz Single Phase Transformer And The Test Results Are Given 1 (108.14 KiB) Viewed 27 times

B1. An electrical engineer tested a 50 kVA, 1000/250 V, 50 Hz, single-phase transformer, and the test results are given in Table B1. Current Power Test Voltage 250 V 5A 200 W Open-circuit test (Low Voltage Side Measurement) Short-circuit test (High Voltage Side Measurement) 50 A 1800 W 90 V Table B1 By using an approximate equivalent circuit, evaluate (a) the equivalent core loss resistance and magnetizing reactance referred (6 marks) to high voltage side, (b) the equivalent winding resistance and flux leakage reactance referred (3 marks) to high voltage side, © the voltage regulation at 75% full load and 0.8 power factor lagging, (6 marks) and (5 marks) the output power at maximum efficiency.