The efficiency of a 1000 kVA, 110/220 V, 50 Hz, single-phase transformer is 98.5 % at half load at 0.8 leading and 98.8% at full load upf.
1
The iron losses of the transformer are 4.07 kW
2
The copper losses of the transformer are 8.08 kW
3
The total losses of the transformer at maximum efficiency are 8.14 kW
4
The total losses at one-fourth of full load are 4.57 kW