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Q. A single-phase, 3-kVA, 220:110-V, 60-Hz transformer has a high-voltage winding resistance of 0.3 , a low-voltage winding resistance of 0.06 , a leakage reactance of 0.8 on its high voltage side, and a leakage reactance of 0.2 on its low-voltage side. The core loss at rated voltage is 45 W, and the copper loss at rated load is 100W. Neglect the exciting current of the transformer. Find the per-unit voltage regulation when the transformer is supplying full load at 110 V and 0.9 lagging power factor.
Spread Time (t s ) During spread time anode voltage falls from 10% I a to the on state voltage drop and anode current rises from 90% I a to final value of anode
why the primary bushing of 7970/13.8 distribution transformer blown up when connected wye on a 13.8 kv source?
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Vital parameters of regulator quality: 1. The output voltage's temperature coefficient of is the change in output voltage with temperature (perhaps averaged over a certain tem
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Q. The full-wave rectified waveform, approximated by the first three terms of its Fourier series, is given by v (ωt) = V m sin (ωt/2), for 0 ≤ ωt ≤ 2π, and where V m = 100
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