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52 ThreeWire ThreePhase Systems
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=VcAVwF0TGeU
52 - Three-Wire Three-Phase Systems • In this video, we shall focus on three wire three phase systems. A three wire three phase system usually has a balanced source voltages with either balanced or unbalanced load connected is star of delta. • In such a circuit, it is usually desired to find the phase and line currents. Since the source is configured in delta, the phase voltage is equal to the line voltage. • for phase currents • IAB = VAB/ZA • IBC = VBC/ZB • ICA = VCA/ZC • for line currents • Ia = IAB-ICA • Ib = IBC-IAB • Ic = ICA-IBC • Star Configuration • VL = root(3)*Vp • IL = Ip • Delta Configuration • VL = Vp • IL = root(3)*Ip • S = root(3)*VL*IL • P = root(3)*VL*IL cos phi • Q = root(3)*VL*IL sin phi • 00:00 - Intro Phase and Line Currents • 07:43 - Star-Delta Transformation • 10:47 - Solved Example
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