Wide span mast
Distribution of the conductor cables to individual masts at the Hirzenach-Oberkestert overhead line crossing .
2 long span masts of the preliminary discharge ; the energy road runs above the black wall in 2 lanes.
A wide span mast is a guy mast in a line section with a large span, e.g. B. Valley spans. In the case of long-span masts, the distances between the conductor cables are larger than the usual values in order to prevent the cables from collapsing in a storm (which would result in a short circuit ).
Long span masts have to have a high strength due to the high tensile forces of the long cable section of the valley crossing and are therefore sometimes designed as portal masts .
In the case of large spans and exposed positions of the wide span masts, a separate mast can be used for each conductor instead of a common mast in order to achieve a particularly large distance between the conductors.
Long credits
Examples:
- Longest span: crossing of Ameralik Fjord, 5376 m, Greenland's first power plant was built in 1993.
- Longest span in Europe: crossing the Sognefjord near Leikanger , 4597 m, Norway.
- In 2009 a field with a length of 2100 m was spanned in southwest Alaskan when crossing the Eagle River in the Tongass National Forest .
- Longest span in Germany: Eyachtalquerung Höfen, 1444 m.