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Iranian Railways RC4
The RAI R-C-4 is a class of 4 axle Bo'Bo' electric locomotives used by the Islamic Republic of Iran Railways; the units have a similar design to the Swedish SJ Rc4. See also * Iranian locomotives While passenger trains are operated by private operators, motive power is generally provided by the Islamic Republic of Iran Railways (RAI). Additionally, Alborz Niroo Equipment & Railway Fleet Company runs freight train using privately owned die ... References Electric locomotives of Iran {{Iran-transport-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
25 KV AC
Railway electrification systems using alternating current (AC) at are used worldwide, especially for high-speed rail. It is usually supplied at the standard utility frequency (typically 50 or 60Hz), which simplifies traction substations. The development of 25kV AC electrification is closely connected with that of successfully using utility frequency. This electrification is ideal for railways that cover long distances or carry heavy traffic. After some experimentation before World War II in Hungary and in the Black Forest in Germany, it came into widespread use in the 1950s. One of the reasons why it was not introduced earlier was the lack of suitable small and lightweight control and rectification equipment before the development of solid-state rectifiers and related technology. Another reason was the increased clearance distances required where it ran under bridges and in tunnels, which would have required major civil engineering in order to provide the increased clearanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overhead Line
An overhead line or overhead wire is an electrical cable that is used to transmit electrical energy to electric locomotives, trolleybuses or trams. It is known variously as: * Overhead catenary * Overhead contact system (OCS) * Overhead equipment (OHE) * Overhead line equipment (OLE or OHLE) * Overhead lines (OHL) * Overhead wiring (OHW) * Traction wire * Trolley wire This article follows the International Union of Railways in using the generic term ''overhead line''. An 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 feeder stations are usually fed from a high-voltage electrical grid. Overview Electric trains that collect their current from overhead lines use a device such as a pantograph, bow collector or trolley pole. It presses against the underside of the lowest overhead wire, the contact wire. Current collectors ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pantograph (rail)
A pantograph (or "pan" or "panto") is an apparatus mounted on the roof of an electric train, tram or electric bus to collect power through contact with an overhead line. By contrast, battery electric buses and trains are charged at charging stations. The pantograph is a common type of current collector; typically, a single or double wire is used, with the return current running through the rails. The term stems from the resemblance of some styles to the mechanical pantographs used for copying handwriting and drawings. Invention The pantograph, with a low-friction, replaceable graphite contact strip or "shoe" to minimise lateral stress on the contact wire, first appeared in the late 19th century. Early versions include the bow collector, invented in 1889 by Walter Reichel, chief engineer at Siemens & Halske in Germany, and a flat slide-pantograph first used in 1895 by the Baltimore and Ohio Railroad The familiar diamond-shaped roller pantograph was devised and patented b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Current
Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current. The abbreviations ''AC'' and ''DC'' are often used to mean simply ''alternating'' and ''direct'', as when they modify ''current'' or ''voltage''. Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be converted into alternating current via an inverter. Direct current has many uses, from the charging of batteries to large power sup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASEA
''Allmänna Svenska Elektriska Aktiebolaget'' (English translation: General Swedish Electrical Limited Company; Swedish abbreviation: ASEA) was a Swedish industrial company. History ASEA was founded in 1883 by Ludvig Fredholm in Västerås as a manufacturer of electrical light and generators. After merging with Wenström's & Granström's Electrical Power Company (''Wenströms & Granströms Elektriska Kraftbolag'') the name was changed to ''Allmänna Svenska Elektriska Aktiebolaget'', literally the "General Swedish Electrical Limited Company", or a ''ASEA'' for short. In 1987, it announced a merger with the Swiss company Brown, Boveri & Cie (BBC) to form ABB Group. ABB Group began operations in 1988. After this merger, ABB Group acquired several companies, including the power transmission and distribution operations of the Westinghouse Electric Corporation and the Combustion Engineering Group. *1889 - the partner Jonas Wenström creates 3-phased generators, motors and transfor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bo-Bo
B-B and Bo-Bo are the Association of American Railroads (AAR) and British classifications of wheel arrangement for railway locomotives with four axles in two individual bogies. They are equivalent to the B′B′ and Bo′Bo′ classifications in the UIC system. The arrangement of two, two-axled, bogies is a common wheel arrangement for modern electric and diesel locomotives. Bo-Bo Bo-Bo is the UIC indication of a wheel arrangement for railway vehicles with four axles in two individual bogies, all driven by their own traction motors. It is a common wheel arrangement for modern electric and diesel-electric locomotives, as well as power cars in electric multiple units. Most early electric locomotives shared commonalities with the steam engines of their time. These features included side rods and frame mounted driving axles with leading and trailing axles. The long rigid wheelbase and the leading and trailing axles reduced cornering stability and increased weight. The Bo-Bo con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SJ Rc
The Rc class is the most used electric locomotive in Sweden. Rc is a universal locomotive used both in freight and passenger trains. The largest operator is Green Cargo, although SJ, Tågab, Hector Rail and the Swedish Transport Administration operate it as well. Previous operators include Veolia Transport. History The Rc-locomotive first appeared in 1967 to replace the older D-locomotives. The locomotives are notable for using thyristors instead of the older relay based system. Usage As of 2020, Rc-locomotives are still used all over Sweden in both passenger and freight lines, although on passenger trains they are slowly being replaced by new EMU, such as ER1. Versions Altogether, there have been eight versions of the Rc-locomotive in Sweden, including the freight locomotive Rm designed to pull iron ore trains. Rc1, Rc2, Rc4, and Rc5 have a maximum allowed speed of 135 km/h. Rc3 and Rc6 have a maximum allowed speed of 160 km/h. Rc7 was a rebuild of Rc6 meant to h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Islamic Republic Of Iran Railways
, majoroperators =RAI, Tooka rail, Samand rail , ridership =21 million , passkm =13 billion , freight =31 million tonnes , tonkm =22 billion tonnes , infrastructure = , length = , doublelength = 1426 km , ellength = 146 km , freightlength = , hslength = , gauge = , hsgauge = , gauge1 = , gauge1length = , gauge2 = , gauge2length = , gauge3 = , gauge3length = , gauge4 = , gauge4length = , el = , el1 = , el1length = , el2 = , el2length = , el3 = , el3length = , start_year = 1887 , end_year = present , notunnels = 105 , tunnellength = 120 km , longesttunnel = 3000 m , nobridges = 350 , longestbridge = 750 m , nostations = 360 , highelevation = 2500 m , highelat = , lowelevation = -20 m , lowelat = , map ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SJ Rc4
The Rc class is the most used electric locomotive in Sweden. Rc is a universal locomotive used both in freight and passenger trains. The largest operator is Green Cargo, although SJ, Tågab, Hector Rail and the Swedish Transport Administration operate it as well. Previous operators include Veolia Transport. History The Rc-locomotive first appeared in 1967 to replace the older D-locomotives. The locomotives are notable for using thyristors instead of the older relay based system. Usage As of 2020, Rc-locomotives are still used all over Sweden in both passenger and freight lines, although on passenger trains they are slowly being replaced by new EMU, such as ER1. Versions Altogether, there have been eight versions of the Rc-locomotive in Sweden, including the freight locomotive Rm designed to pull iron ore trains. Rc1, Rc2, Rc4, and Rc5 have a maximum allowed speed of 135 km/h. Rc3 and Rc6 have a maximum allowed speed of 160 km/h. Rc7 was a rebuild of Rc6 meant to h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iranian Locomotives
While passenger trains are operated by private operators, motive power is generally provided by the Islamic Republic of Iran Railways (RAI). Additionally, Alborz Niroo Equipment & Railway Fleet Company runs freight train using privately owned diesel locomotives. Current Electric locomotives Diesel locomotives This is an incomplete list of diesel locomotives used in Iran. Electric multiple unit High-speed trains Diesel multiple unit Carriages Former Steam locomotives Steam locomotives have been phased out by Iran Railways. References Sources: from World's Main locomotives and railfaneurope and traction dep. of RAI.{{cite web , url=http://keshesh.rai.ir/site.aspx , title=اداره کل نيروي کشش , accessdate=2010-12-27 , url-status=dead , archiveurl=https://web.archive.org/web/20110319063516/http://keshesh.rai.ir/site.aspx , archivedate=2011-03-19 Rolling stock of Iran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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