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Overhead lines

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The overhead lines of a Swiss Federal Railways track.
Two overhead conductor rails for the same track. Left: 1200 V DC for the Uetliberg railway (note that the pantograph has to be mounted asymmetrically to collect current from this rail). Right: 15,000 V AC for the Sihltal railway

Overhead lines or overhead wires are used to transmit electrical energy to trams, trolleybuses or trains at a distance from the energy supply point.

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