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Rating of Electric Power Cables in Unfavorable Thermal Environment



Rating of Electric Power Cables in Unfavorable Thermal Environment

George J. Anders

ISBN: 978-0-471-67909-7 April 2005 Wiley-IEEE Press 326 Pages


Rating of Electric Power Cables in Unfavorable Thermal Environment is the first text to provide you with the computational tools and techniques needed to successfully design and install power cables in areas affected by such factors as outside heat sources, ground moisture, or impediments to heat dissipation. After thoroughly reviewing standard rating models, the author discusses several new techniques designed to improve cable ampacity, as well as new computational techniques for analysis of cyclic loads. To facilitate computational tasks he utilizes six representational model cables throughout the book, including transmission-class, high-voltage, distribution, and bundled types. End-of-chapter summaries, liberal numerical examples, and practical, real world applications make this text a valuable resource for making better design and operation decisions.
1. Review of power cable standard rating methods.

2. Ampacity reduction factors for cables crossing thermally unfavorable regions.

3. Cable crossings - derating considerations.

4. Application of thermal backfills for cables crossing unfavorable thermal environments.

5. Special considerations for real-time rating analysis and deeply buried cables.

6. Installations involving multiple cables in air.

7. Rating of pipe-type cables with slow circulation of dielectric fluid.

Appendix A: Computations of the mean moisture content in media surrounding underground power cables.

Appendix B: Estimation of backfill thermal resistivity.

Appendix C: Equations for dielectric fluid parameters.

"…provides electrical engineers and power professionals a better understanding of these unfavorable thermal conditions and practical methods to calculate and design cost-effective yet dependable power circuits." (E-STREAMS, May 2006)

"This reference book should be on the bookshelf of power engineers or application engineers...a practical and excellent resource…" (IEEE Electrical Insulation Magazine, November/December 2005)