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Figure below shows a simple single-phase AC power system with three loads. The voltage source is V = 240 < o°v and the impedances of these three loads are z, = 10 < 30'n Z2 = 10 < 45°N Z3 = 10 < -90°n

Figure below shows a simple single-phase AC power system with three loads. The voltage source is V = 240 < o°v and the impedances of these three loads are z, = 10 < 30'n Z2 = 10 < 45°N Z3 = 10 < -90°n

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Question#5 Figure below shows a simple single-phase AC power system with three loads. The voltage source is V = 240 < o°v and the impedances of these three loads are z, = 10 < 30°n Z2 = 10 < 45°0 Z3 = 10 < -90°n V Z, Answer the following questions about this power system. a. Assume that the switch shown in the figure is initially open, and calculate the current I, the power factor, and the real, reactive, and apparent power being supplied by the source. b. How much real, reactive, and apparent power is being consumed by each load with the switch open?
Transcribed Image Text:Question#5 Figure below shows a simple single-phase AC power system with three loads. The voltage source is V = 240 < o°v and the impedances of these three loads are z, = 10 < 30°n Z2 = 10 < 45°0 Z3 = 10 < -90°n V Z, Answer the following questions about this power system. a. Assume that the switch shown in the figure is initially open, and calculate the current I, the power factor, and the real, reactive, and apparent power being supplied by the source. b. How much real, reactive, and apparent power is being consumed by each load with the switch open?
c. Assume that the switch shown in the figure is now closed, and calculate the current I, the power factor, and the real, reactive, and apparent power being supplied by the source. d. How much real, reactive, and apparent power is being consumed by each load with the switch closed? e. What happened to the current flowing from the source when the switch closed? Why?
Transcribed Image Text:c. Assume that the switch shown in the figure is now closed, and calculate the current I, the power factor, and the real, reactive, and apparent power being supplied by the source. d. How much real, reactive, and apparent power is being consumed by each load with the switch closed? e. What happened to the current flowing from the source when the switch closed? Why?
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