1. With the aid of delta and star connection diagrams, state the basic equations from which the delta–star and star–delta conversion equations can be derived. 2. Three resistors having resistances 50 ?, 100 ? and 150 ? are star-connected to terminals A, B and C respectively. Calculate the resistances of equivalent delta-connected resistors. 3. Transform the delta shown in figure (a) to the Y (star) shown in figure (b). a) R1=20 ?, R2=30 ? & R3=50 ? b) R1=R2=R3=36 ?
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The basic equations for delta-star and star-delta conversion can be derived from the following relationships: For delta-star conversion: Ra = (R1 * R2) / (R1 + R2 + R3) Rb = (R2 * R3) / (R1 + R2 + R3) Rc = (R3 * R1) / (R1 + R2 + R3) For star-delta conversion: R1 Show more…
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