Question

Problem 1 A balanced three-phase source supplies two loads, as shown in Fig. 1. The voltage rating of the 3-phase source is 6600230° V. Load 1 impedance is 2 =45.9+j572 per phase, Load 2 impedance is Zz=12+j252 per phase. The loads are connected to the source by a 3-phase line with the impedance of ZLine=2.7+j52 per phase. Zine Load 1 a Load 2 a la Z Z Z2 VL Zino Z2 b с 22 с Zine b Fig. 1 Balanced 3-phase circuit and two loads Convert the 3-phase circuit to an equivalent 1-phase circuit, taking the line to neutral Van as reference. Calculate: 1) Current in phase a i.e. the line current la 2) Total complex power supplied by the source. 3) 3-phase complex power consumed by Load 1 and Load 2 combined. 4) Power factor of the combined load 5) Current la that flows in the delta-connected Load 1.

Answer 1

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