5th Edition

ISBN: 9780073529547

Author: Chapman, Stephen J.

Publisher: MCGRAW-HILL HIGHER EDUCATION

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A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage…

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Textbook Question

Chapter 2, Problem 2.24P

Figure P2-4 shows a one-line diagram of a power system consisting of a three-phase, 480-V, 60-Hz generator supplying two loads through a transmission line with a pair of transformers at either end. (NOTE: One-line diagrams are described in Appendix A, the discussion of three-phase power circuits.)

Chapter 2, Problem 2.24P, Figure P2-4 shows a one-line diagram of a power system consisting of a three-phase, 480-V, 60-Hz

FIGURE P2-4

A one-line diagram of the power system of Problem 2-24. Note that some impedance values are given in the per-unit system, while others are given in ohms.

Sketch the per-phase equivalent circuit of this power system.
With the switch opened, find the real power P, reactive power Q, and apparent power S supplied by the generator. What is the power factor of the generator?
With the switch closed, find the real power P, reactive power Q, and apparent power S supplied by the generator. What is the power factor of the generator?
What are the transmission losses (transformer plus transmission line losses) in this system with the switch open? With the switch closed? What is the effect of adding Load 2 to the system?

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Chapter 2, Problem 2.23P

Chapter 3, Problem 3.1Q

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Chapter 2 Solutions

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