ETO – ETO – Section 1 : 2018/NOV/01 – 2019/JAN/03 – 2019/APR/03 – 2020/OCT/05 – 2021/MAR/04 – 2022/JUN/05
Question
Q5. a) Describe the different type of losses occurring in the Power Transformers. (4)
b) A single-phase power transformer supplied a load of 20 KVA at a P.F of 0.81 (lagging). The iron loss of the transformer is 200 W and the copper loss at this load is 180 W. Calculate
(i) The efficiency
(ii) If the load is now changed to 30 KVA at a p.f of 0.91 (lagging). Calculate the new efficiency
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