Electrical Engineering · Electrical Machines
Two single-phase transformers, rated at 400 kVA each, are tested using Sumpner's test (back-to-back test) and yield the following results: W 1 in the supply line = 8 kW W 2 in the secondary series circuit (with full-load current circulating through the secondaries) = 12 kW Determine the efficiency of each transformer at full load (assuming unity power factor).
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