q a 300-kva transformer has a core loss of 15 kw, Electrical Engineering

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q a 300-kva transformer has a core loss of 15 kw

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.

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