Industrial Power Distribution Second Edition by Ralph E. Fehr
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Industrial Power Distribution Second Edition by Ralph E. Fehr


SINCE THE RELEASE of the first edition in October 2001, I have received many comments from readers saying how helpful the text was while preparing for and taking the Professional Engineering (PE) examination. Truth be told, I never really thought about the PE exam while preparing the first edition manuscript. My objective was simply to produce a book useful to both students and practitioners.

When the National Council of Examiners for Engineering and Surveying (NCEES) restructured the Electrical Engineering PE exam in April 2009 creating a power-specific exam, I saw the relevance of aligning this text more with the new exam format. Several new topics, including arc flash hazard and lighting systems, have been added to this edition, keeping current with the latest trends and practices in the power field. More depth and some derivations have also been added to other sections, such as an in-depth exploration of the per-unit system, additional material on motor application, a thorough analysis of AC power in both the time and phasor domains, and an intuitive development of three-phase symmetrical components.

I have never believed in deriving an equation simply for the sake of deriving it (that is a great exercise for mathematicians, but engineers should focus their efforts on application of the formula), but AC power and symmetrical components are exceptions to my tenet on derivations since these are so widely used by power engineers, and complete comprehension, in my opinion, requires going through the step-by-step development. Enhancements such as these should add to the level of understanding of critical power engineering concepts for many students.

Practitioners in the electric power industry will also find this book useful both as a reference and as a means of filling in gaps in their understanding of key concepts. Based largely on practices in the United States, this book references primarily US standards and codes. Often times, similar standards and codes have been developed and adopted abroad, and readers outside the United States are encouraged to investigate local standards and codes. Similarly, customary US units of measurements, as are commonly encountered in the United States, are used throughout the book. The material covered in this book will be a valuable reference for the practicing power engineer, but will be just as helpful to the engineering student pursuing a career in the power industry.

Few US universities have comprehensive programs in electric power that align with industry requirements. Narrowing the gap between what topics are taught at the university and what skills are needed by industry should be made a very high priority, both in academia and in industry. A close academia–industry partnership is needed to accomplish such a lofty goal. It is my hope that this book will help narrow the gap and forge the partnership. Developing new courses based on Industrial Power Distribution and incorporating the book into existing courses will facilitate the alignment of the academic curriculum with industry needs.

Over 370 students at the University of South Florida and many more through short courses conducted worldwide have studied the contents of the first edition, and as a result, many constructive comments were made. Between those comments and the expertise of the manuscript reviewers, I believe the second edition of Industrial Power Distribution will be a valuable resource for engineering students and practicing power engineers alike, and will help create an academic environment better able to address the needs of the electric power industry.

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