July 2008
Intermediate to advanced
625 pages
17h 13m
English
Content preview from Electric Power Transmission and Distribution
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7
Mechanical Design of Transmission Line
CHAPTER OBJECTIVES
After reading this chapter, you should be able to:
- Understand the overview of transmission line supports
- Understand the calculation of sag
- Discuss the effect of tower structure and environmental effects on sag calculation
7.1 INTRODUCTION
The design of a transmission line has to satisfy electrical as well as mechanical considerations. An overhead line comprises mainly of conductors, line supports, insulators, and pole fittings. These should have sufficient mechanical strength to withstand the worst probable weather conditions and other external interferences. This calls for the use of proper mechanical factors of safety in order to ensure the continuity of operation in the line. ...
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