(b) The primary and secondary winding of a \( 40 \mathrm{kva}, 6600 / 250 \mathrm{v} \), single phase transformer has resistance of 10 ohm and 0.02 olm respectively. The leakage reactance as referred to primary is 35 ohm . Find (i) full load voltage regulation at a power factor 0.8 lagging? (ii) Primary voltage required to circulate full load current when secondary is short circuited?
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8 lagging: The voltage regulation of a transformer is given by the formula: VR = (I * (R * cosθ + X * sinθ)) / V where: I = Full load current R = Equivalent resistance referred to primary X = Equivalent reactance referred to primary θ = Power factor angle V = Show more…
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The primary and secondary windings of a 30-kVA, 6000-V / 230-V transformer have resistances of 10 Ω and 0.016 Ω respectively. The total reactance of the transformer referred to the primary is 23 Ω. Calculate the percentage regulation of the transformer when supplying full load current at a power factor of 0.8 lagging.
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