Titlebook: Overhead Power Lines; Planning, Design, Co Friedrich Kiessling,Peter Nefzger,Ulf Kaintzyk Book 20031st edition Springer-Verlag Berlin Heide

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Insulators,umidity, dew, fog, rain, as well as . by deposits of dusts, salts, firing residuals and industrial gases. The . should be so high that every incident load is carried with enough operational security. . and . should be large enough to withstand the .. Definitions can be found in IEC 60 050-471 [9.1]

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Conductor vibrations,zardous vibrations that impair the reliability and . of a power line. Special attention should be paid to all types of . when designing a power line to keep adverse drawbacks at a minimum. Three main groups may be distinguished, so far as vibration excitation, vibration modes and frequencies are concerned [11.1].

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Earthing,The standard EN 50341-1 [5.1] lists five requirements for earthing systems:

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Requirements on loading and strength,e the mechanical strength of these components taking care of the fact that a failure of any component may lead to the loss of the complete transmission capacity. As shown in Figure 6.1, the overhead line system is divided into four . and .. There, the supports may be suspension, angle, strain or dead-end towers.

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