UNIT – I

A 25-kVA transformer has 500 turns on the primary & 100 turns on the secondary winding. The primary is connected to 2000V. Determine the F.L primary & secondary currents & also N.L secondary voltage. A 5-kVA transformer has iron loss & copper loss of 100 & 200W respectively. Determine the efficiency at half F.L & 0.8 power factor lagging. ................
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