Academics – Electro-Technology : 2017/DEC/06
Question
Q6. A 50 kVA transformer has an efficiency of 98 % at full load, 0.8 p.f. and 97 % at half load, 0.8 p.f. lag. Calculate EACH of the following:
(a) The full load copper loss; (8)
(b) Load at which maximum efficiency occurs; (4)
(c) The maximum efficiency for 0.8 p.f. load. (4)
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