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7. Appendix 1: Conductor bundle
Extra-high-voltage lines, above 300 kV, are almost exclusively equipped with bundles of several conductors per phase. This arrangement ensures that conductor surface fields remain within acceptable limits.
A bundle (figure 2 ) is characterized by the following quantities:
n number of elementary conductors ;
radius of elementary conductors ;
equivalent beam radius ;
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Appendix 1: Conductor bundle
Appendix 2: Line conductor resistance
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