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Q. A 25-kVA, 2200:220-V, 60-Hz, single-phase transformer has an equivalent series impedance of 3.5 + j4.0 referred to the primary high-voltage side.
(a) Determine the highest value of voltage regulation for full-load output at rated secondary terminal voltage.
(b) At what power factor does it occur?
(c) Sketch the corresponding phasor diagram.
Q. A 150-kVA, 2400/240-V, 60-Hz, single-phase transformer has the following parameters: R 1 = 0.2 , R 2 = 0.002 , X 1 = 0.45 , X 2 = 0.0045 , RC = 10 k, and Xm = 1.55 k,
derive transfer function of S= 2.25+j4.5
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