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- W173618362 abstract "This chapter explains the factors involved in the selection of overhead line conductors. The calculation of electrical ratings is covered in some detail, with examples. The chapter focuses on the calculation of design spans, the effect of creep, calculations for sloping spans, and guidance on clearances, with further examples. It reviews the conductor fittings and provides calculations on overhead line impedance. It concludes with a comprehensive case study on busbar selection for an outdoor substation. Overhead lines are, in essence, air-insulated cables suspended from insulated supports with a power transfer capacity approximately proportional to the square of the line voltage. Overhead lines are cheaper in initial capital cost and are generally more economic than cable feeders. For the transmission of equivalent power at 11 kV, a cable feeder would cost some five times the cost of a transmission line, at 132 kV up to 8 times, and at 400 kV between 10 and 20 times. Such comparisons must, however, be treated in more depth since they must take into account rights of way, amenity, clearance problems, planning permissions associated with the unsightly nature of erecting bare conductors in rural and urban areas, and ongoing operations and maintenance requirements." @default.
- W173618362 created "2016-06-24" @default.
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- W173618362 date "2012-01-01" @default.
- W173618362 modified "2023-10-15" @default.
- W173618362 title "Overhead Line Conductor and Technical Specifications" @default.
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- W173618362 doi "https://doi.org/10.1016/b978-0-08-096912-1.00018-6" @default.
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