A 135 kVA, 50 Hz transformer with a 440 V primary and a 6600 V secondary has a Secondary Output Voltage V 2 = 6600 V, when the secondary Load Impedance of: Z L = 267.8 + j180 Ω
For Transformer determine:
(i) The approximate equivalent circuit model with the parameters referred to the primary shown on the model; [ 12 Marks]
(ii) The secondary Load Current I L & Power Factor PF L ; [ 6 Marks]
(iii) The Voltage Regulation with the above secondary Load. [ 6 Marks]
(iv) The input Supply Current I 1 & Power Factor PF 1 ; [ 18 Marks]
(v) The efficiency of the transformer with the above secondary Load; [ 8 Marks]
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