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The first overhead power line was built from Necaxa to Mexico City and El Oro de Hidalgo in 1905, when the hydroelectric plant in Necaxa opened. This 60 kV power line also was the world's longest power line in 1905. Despite the age, parts of the power line are still in service. [22] Around 1930, central Mexico already had an interconnected grid.
High- and medium-voltage power lines in Łomża, Poland Extra high-voltage overhead line 750 kV. Overhead power transmission lines are classified in the electrical power industry by the range of voltages: Low voltage (LV) – less than 1000 Volts, used for connection between a residential or small commercial customer and the utility.
The overhead line crossing the Strait of Messina — which, with a span of 3646 meters, was one of the longest overhead line crossings in the world, with 200-meter pylons among the highest in the world — was replaced by a submarine cable, because of its small maximum transmittable electrical power.
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The generic term used by the International Union of Railways for the technology is overhead line. [1] It is known variously as overhead catenary, overhead contact line (OCL), overhead contact system (OCS), overhead equipment (OHE), overhead line equipment (OLE or OHLE), overhead lines (OHL), overhead wiring (OHW), traction wire, and trolley wire.
An overhead cable is a cable for the transmission of information, laid on utility poles. Overhead telephone and cable TV lines are common in North America. These poles sometimes carry overhead power lines for the supply of electric power. Power supply companies may also use them for an in-house communication network.
Pages in category "Overhead power lines" The following 8 pages are in this category, out of 8 total. This list may not reflect recent changes. ...
Overhead power lines range from 1kV for local distribution to 1,150 kV for ultra high voltage lines. These can produce electric fields up to 10kV/m on the ground directly underneath, but 50 m to 100 m away these levels return to approximately ambient. [20] Metal equipment must be maintained at a safe distance from energized high-voltage lines. [21]