A transmission tower (also electricity pylon, hydro tower, or pylon) is a tall structure, usually a lattice tower made of steel that is used to support an overhead power line. In electrical grids, transmission towers carry high-voltage transmission lines that transport bulk electric power from generating stations to electrical substations, from which electricity is delivered to end consumers; moreover, utility poles are used to support lower-voltage sub-transmission and distribution lines that transport electricity from substations to electricity customers.
There are four categories of transmission towers: (i) the suspension tower, (ii) the dead-end terminal tower, (iii) the tension tower, and (iv) the transposition tower.[1]
The heights of transmission towers typically range from 15 to 55 m (49 to 180 ft),[1] although when longer spans are needed, such as for crossing water, taller towers are sometimes used. More transmission towers are needed to mitigate climate change, so in the 2020s transmission towers became politically important.[2][3]
^ ab"Environmental, Health, and Safety Guidelines for Electric Power Transmission and Distribution" (PDF). International Finance Corporation. 2007-04-30. p. 21. Retrieved 2013-09-15.
^"The Case for an Environmentalism that Builds". The Economist. ISSN 0013-0613. Retrieved 2023-10-03.
^"The looming battle over pylons for green energy". BBC News. 31 July 2023.
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