engineering recuitment GATE EE 2023-24 Test Series Electrical Machines Transformer Efficiency of a Transformer
The parameters of an approximate equivalent circuit of 100 kVA 2000/200 V, 1ϕ transformer are as follows:
R1 = 0.2 Ω , R2 = 2 mΩ
X1 = 0.45 Ω , X2 = 4.5 mΩ
Rc = 10 kΩ , Xm = 1.55 kΩ
The efficiency of the transformer at full load, 0.8 pf lag (in %) is:
Enter numerical value using the virtual keypad. Round off where necessary.