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Rolling stock was dual-voltage with automatic switching between 25 kV and 6.25 kV. The 6.25 kV sections were converted to 25 kV AC as a result of research work that demonstrated that the distance between live and earthed equipment could be reduced from that originally thought to be necessary.
Parts of the original electrified network still operate at 25 Hz, with voltage boosted to 12 kV, while others were converted to 12.5 or 25 kV 60 Hz. In the UK, the London, Brighton and South Coast Railway pioneered overhead electrification of its suburban lines in London, London Bridge to Victoria being opened to traffic on 1 December 1909.
Rolling stock is owned by rolling stock companies (ROSCO) and leased to the train operators; competitive tenders are invited from manufacturers for new trains. To ensure flexibility with leasing arrangements electric multiple units are specified to be able to be modified to run on both the 25 kV AC and 750 V DC systems. [120]
SP1900 EMU. (Still owned by the KCR Corporation). The SP1900 EMU / SP1950 EMU or IKK Train (formerly KCR EMU SP1900 / SP1950 EMU; 港鐵近畿川崎列車, also known as the Millennium Train during the public promotion) is a model of train that runs on Hong Kong's Tuen Ma line. It was the second model of electric multiple unit rolling stock of ...
North Jersey Coast Line, New Jersey Transit. Converted in 1978 from Pennsylvania Railroad 11 kV 25 Hz system to the 12.5 kV 25 Hz on the Rahway-Matawan ROW and 12.5 kV 60 Hz electrification extended to Long Branch in 1988. The Matawan-Long Branch voltage converted from 12.5 kV 60 Hz system to the 25 kV 60 Hz in 2002.
Railway electrification in Great Britain. Acton Central station is a changeover point from 750 V DC third rail, to 25 kV AC overhead electrification, on the North London Line. Railway electrification in Great Britain began in the late 19th century. A range of voltages has been used, employing both overhead lines and conductor rails.
British Rail Class 799. The British Rail Class 799 HydroFLEX is a prototype class of bi-mode [ 3 ] multiple unit adapted from Class 319 electric multiple units (319001/382). The existing 25 kV AC and 750 V DC equipment has been retained with a hydrogen fuel cell added, currently taking up one of the carriages.
Railway electrification as a means of traction emerged at the end of the nineteenth century, although experiments in electric rail have been traced back to the mid-nineteenth century. [1] Thomas Davenport, in Brandon, Vermont, erected a circular model railroad on which ran battery-powered locomotives (or locomotives running on battery-powered ...