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.Īn overhead line consists of one or more wires (or rails, particularly in tunnels) situated over rail tracks, raised to a high electrical potential by connection to feeder stations at regular intervals. The generic term used by the International Union of Railways for the technology is overhead line. Overhead linesĪn overhead line or overhead wire is an electrical cable that is used to transmit electrical energy to electric locomotives, trolleybuses or trams. For lines carrying information, see Overhead cable. For powerlines mounted on pylons, see Overhead power line. For transmission of bulk electrical power to general consumers, see Electric power transmission. This article is about the transmission of electrical power to road and rail vehicles.
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