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A 1.5 KVA, 220/120 V, 60Hz real step-down transformer has the following parameters that are all...

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Electrical Engineering

A 1.5 KVA, 220/120 V, 60Hz real step-down transformer has thefollowing parameters that are all referred to the primary-side: thetotal copper loss R = 2.4 Ω, the core loss Rc = 2.4 KΩ, themagnetization reactance Xm = 2 KΩ, and all the leakages arenegligible. Suppose that the output port in the secondary-side isoperated at full-load and rated voltage with the unity power factorp.f. = 1.

(a) Find the power factor p.f.1 at the primary-side inputport;

(b) What is the voltage regulation (V R)?

(c) Determine the power efficiency η .

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