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Q. A 300-kVA transformer has a core loss of 1.5 kW and a full-load copper loss of 4.5 kW.
(a) Calculate its efficiency corresponding to 25, 50, 75, 100, and 125% loads at unity power factor.
(b) Repeat the efficiency calculations for the 25% load at power factors of 0.8 and 0.6.
explain about heat time curve and cool time curve
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An oil-filled transformer has a c.m.r. of 500 kVA which allows it to run continuously in an ambient of 35°C with an oil temperature rise of 50°C. The transformer has a time constan
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#question.resultant of two simple harmonic motions.
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