i) ii) Three loads with impedances j5 ohms, 10 ohms and -j10 ohms are connected in Case 1 - Delta; Case 2 - Star with no neutral (isolated or ungrounded star); and Case 3 - Star with neutral wire. Assume a balanced positive sequence for the source voltages with phase voltage of 120 V connected in star. Take the source impedance and line impedance to be 0.4 +j 0.3 ohm per phase and 0.6+j0.7 ohm per phase, respectively. Determine for each case the line currents and phase currents power generated by the supply and consumed by each load. In each case, show that the power balance equation is satisfied i.e. power generated = power loss and power demand

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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i)
ii)
Three loads with impedances j5 ohms, 10 ohms and -j10 ohms are connected in Case 1 -
Delta; Case 2 - Star with no neutral (isolated or ungrounded star); and Case 3 - Star with
neutral wire. Assume a balanced positive sequence for the source voltages with phase
voltage of 120 V connected in star. Take the source impedance and line impedance to be
0.4+j 0.3 ohm per phase and 0.6 + j0.7 ohm per phase, respectively. Determine for each
case
the line currents and phase currents
power generated by the supply and consumed by each load. In each case, show that
the power balance equation is satisfied i.e. power generated = power loss and power
demand
Transcribed Image Text:i) ii) Three loads with impedances j5 ohms, 10 ohms and -j10 ohms are connected in Case 1 - Delta; Case 2 - Star with no neutral (isolated or ungrounded star); and Case 3 - Star with neutral wire. Assume a balanced positive sequence for the source voltages with phase voltage of 120 V connected in star. Take the source impedance and line impedance to be 0.4+j 0.3 ohm per phase and 0.6 + j0.7 ohm per phase, respectively. Determine for each case the line currents and phase currents power generated by the supply and consumed by each load. In each case, show that the power balance equation is satisfied i.e. power generated = power loss and power demand
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