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When the overhead line was raised in the Simplon Tunnel to accommodate taller rolling stock, a rail was used. A rigid overhead rail may also be used in places where tensioning the wires is impractical, for example on moveable bridges. In modern uses, it is very common for underground sections of trams, metros, and mainline railways to use a ...
Overhead lines or overhead wires are used to transmit electrical energy to trams, trolleybuses or trains. Overhead line is designed on the principle of one or more overhead wires situated over rail tracks. Feeder stations at regular intervals along the overhead line supply power from the high-voltage grid.
Generally, high-speed rail is defined as having a top speed in regular use of over 200 km/h (124 mph). Although almost every form of high-speed rail is electrically driven via overhead lines, this is not necessarily a defining aspect and other forms of propulsion, such as diesel locomotives, may be used.
Rail transport terms are a form of technical terminology applied to railways. Although many terms are uniform across different nations and companies, they are by no means universal, with differences often originating from parallel development of rail transport systems in different parts of the world, and in the national origins of the engineers and managers who built the inaugural rail ...
There used to be a historical concern for double-stack rail transport regarding clearances with overhead lines [1] but it is no longer universally true as of 2022, with both Indian Railways [4] and China Railway [5] [6] [7] regularly operating electric double-stack cargo trains under overhead lines. Railway electrification has constantly ...
In this system, the current is mainly carried between the overhead line and a feeder transmission line instead of the rail. The overhead line (3) and feeder (5) are on opposite phases so the voltage between them is 50 kV, while the voltage between the overhead line (3) and the running rails (4) remains at 25 kV. Periodic autotransformers (9 ...
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In addition, railway costing models typically handle passenger and freight traffic, making them applicable in more situations, including mixed traffic situations. some commercial variations of railway costing models have been implemented, including the OSCAR railway costing model developed by CPCS Transcom Limited. CPCS is an international ...