Electrical Engineering ⇒ Topic : Bye/delta or delta/bye Conversions for Balanced Loads

Daniel
 
Y/Δ or Δ/Y Conversions for Balanced Loads Two circuits are electrically equivalent if they draw the same line current and power when connected to the same line voltage. Consider a balanced Yconnected load having an impedanceZ_{1 }in each phase as shown in Fig. (a). Let the equivalent Δconnected load have an impedance of Z_{2 }in each phase as shown in Fig. (a). Since the two circuits are equivalent, the impedance between any *two corresponding terminals of the two circuits is the same. Considering terminals 1 and 2, (a) (b) figure Using equations (i) or (ii), Y/Δ or Δ/Y conversions can be made for the balanced loads. For example, if a balanced AΔ load has an impedance of (6 +j9) ohms per phase, then impedance of each phase of the equivalent Yconnected load will be = (6 +j9)/3 = (2 +j3) ohms These conversions may be helpful in solving problems relating to 3phase balanced loads connected in parallel  
 
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