(A)-A 3-phase 400KVA, 11000/416 transformer is delta-connected on the primary and star connected on the secondary. The primary resistance / phase is 4.3 2 and secondary resistance/phase is 0.002 2....

Extracted text: (A)-A 3-phase 400KVA, 11000/416 transformer is delta-connected on the primary and star connected on the secondary. The primary resistance / phase is 4.3 2 and secondary resistance/phase is 0.002 2. determine the efficiency on 75% of full-load at o.8 power factor Jagging if the iron loss is 990 watt