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11.10 11.11 11.23 Homework 2? A balanced three-phase circuit has the following characteristics: * Y-Y connected; ¢ The line voltage at 110V3 /—60° V; ¢ The phase sequence is positive; © The line impedance is 3 + j2 0/¢; ¢ The load impedance is 37 + j28 0/¢; a) Draw the single phase equivalent circuit for the a-phase. b) Calculated the line current in the a-phase. c) Calculated the line voltage at the load in the a-phase. the source, Vy», is The magnitude of the line voltage at the terminals of a balanced Y-connected load is 6600 V. The load impedance is 240 — j70 0/¢. The load is fed from a line that has an impedance of 0.5 + j4 0/¢. a) What is the magnitude of the line current? b) What is the magnitude of the line voltage at the source? a) Find the rms magnitude and the phase angle of Ic, in the circuit shown in Fig. P11.23. b) What percent of the average power delivered by the three-phase source is dissipated in the three- phase load? Figure P11.23 p20 a 150 A aan ew 85.5.0 + © 1365/0° V $85.50 jil4a 2Q 7150 B 1365/=120° V 9550 © 1365/120° V jil4a jil4a j2a ¢ 150 na Ww 
