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Dual Electrification
Dual electrification is a system whereby a railway line is supplied power both via overhead catenary and a third rail. This is done to enable trains that use either system of power to share the same railway line, for example in the case of mainline and suburban trains (as used at Hamburg S-Bahn between 1940 and 1955). Examples * London, UK **North London Line changeover at Acton Central. **Northern City Line changeover at Drayton Park. ** Thameslink route changeover at City Thameslink (northbound) and Farringdon (southbound). ** West London line changeover between Willesden Junction and Shepherd's Bush. * New York, NY ** Penn Station ** East River Tunnels ** North River Tunnels * Athens, GR ** Line 3 of Athens Metro uses third rail for underground part and overhead power supply on surface for access to/from Airport. Variations Both systems live The system is usually used only in exceptional cases as it can lead to problems caused by the interaction of the electric circuits; for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hugh Llewelyn 319 443 (6331362327)
Hugh may refer to: *Hugh (given name) Noblemen and clergy French * Hugh the Great (died 956), Duke of the Franks * Hugh Magnus of France (1007–1025), co-King of France under his father, Robert II * Hugh, Duke of Alsace (died 895), modern-day France * Hugh of Austrasia (7th century), Mayor of the Palace of Austrasia * Hugh I, Count of Angoulême (1183–1249) * Hugh II, Count of Angoulême (1221–1250) * Hugh III, Count of Angoulême (13th century) * Hugh IV, Count of Angoulême (1259–1303) * Hugh, Bishop of Avranches (11th century), France * Hugh I, Count of Blois (died 1248) * Hugh II, Count of Blois (died 1307) * Hugh of Brienne (1240–1296), Count of the medieval French County of Brienne * Hugh, Duke of Burgundy (d. 952) * Hugh I, Duke of Burgundy (1057–1093) * Hugh II, Duke of Burgundy (1084–1143) * Hugh III, Duke of Burgundy (1142–1192) * Hugh IV, Duke of Burgundy (1213–1272) * Hugh V, Duke of Burgundy (1294–1315) * Hugh Capet (939–996), King of France * Hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Willesden Junction Station
Willesden Junction is a railway station in Harlesden, north-west London, UK. It is served by both London Overground and London Underground services. History The station developed on three contiguous sites: the West Coast Main Line (WCML) station was opened by the London & North Western Railway on 1 September 1866 to replace the London and Birmingham Railway's Willesden station of 1841 which was to the northwest. Passenger services ended in 1962 when the platforms were removed during the electrification of the WCML to allow the curvature of the tracks to be eased. Later the bridges for the North London Line (NLL) were rebuilt. The High-Level station on the NLL was opened by the North London Railway in 1869 for two Richmond tracks and later for two Shepherds Bush tracks, both crossing the WCML roughly at right angles. In 1894 a new, combined High-Level station was built, with an island platform plus a third shorter platform for Earls Court trains (which was later removed) to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Train
In rail transport, a train (from Old French , from Latin , "to pull, to draw") is a series of connected vehicles that run along a railway track and Passenger train, transport people or Rail freight transport, freight. Trains are typically pulled or pushed by locomotives (often known simply as "engines"), though some are self-propelled, such as multiple units. Passengers and cargo are carried in railroad cars, also known as wagons. Trains are designed to a certain Track gauge, gauge, or distance between rails. Most trains operate on steel tracks with steel wheels, the low friction of which makes them more efficient than other forms of transport. Trains have their roots in wagonways, which used railway tracks and were Horsecar, powered by horses or Cable railway, pulled by cables. Following the invention of the steam locomotive in the United Kingdom in 1804, trains rapidly spread around the world, allowing freight and passengers to move over land faster and cheaper than ever pos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternating Current
Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket. A common source of DC power is a battery cell in a flashlight. The abbreviations ''AC'' and ''DC'' are often used to mean simply ''alternating'' and ''direct'', as when they modify ''current'' or ''voltage''. The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with positive direction of the current and vice versa. In certain applications, like guitar amplifiers, different waveforms are used, such as triangular waves or square waves. Audio a ... [...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] |
Athens International Airport
Athens International Airport ''Eleftherios Venizelos'' ( el, Διεθνής Αερολιμένας Αθηνών «Ελευθέριος Βενιζέλος», ''Diethnís Aeroliménas Athinón "Elefthérios Venizélos"''), commonly initialised as AIA , is the largest international airport in Greece, serving the city of Athens and region of Attica. It began operation on 28 March 2001 (in time for the 2004 Summer Olympics) and is the main base of Aegean Airlines, as well as other smaller Greek airlines. It replaced the old Ellinikon International Airport. Athens International is currently a member of Group 1 of Airports Council International (over 25 million passengers) as of 2021, it is the 15th-busiest airport in Europe and the busiest and largest in the Balkans. History Development and ownership AIA is located between the towns of Markopoulo, Koropi, Spata and Loutsa, about to the east of central Athens ( by road, due to intervening hills). The airport is named after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Athens Metro
The Athens Metro ( el, Μετρό Αθήνας, Metro Athinas, translit-std=iso) is a rapid-transit system in Greece which serves the Athens urban area and parts of East Attica. Line 1 opened as a conventional steam railway in 1869 and electrified in 1904. In 1991, Attiko Metro S.A. constructed and extended Lines 2 and 3. It has significantly changed Athens by providing a much-needed solution to the city's traffic and air pollution problem, as well as revitalising many of the areas it serves. Extensions of existing lines are under development, as well as a new Line 4, whose central section began construction in October 2021. The Athens Metro is actively connected with the other means of public transport, such as buses, trolleys, the Athens Tram and the Athens Suburban Railway. The Athens Metro is hailed for its modernity (mainly the newer lines 2, 3) and many of its stations feature works of art, exhibitions and displays of the archaeological remains found during its construc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Line 3 (Athens Metro)
Line 3 of the Athens Metro runs from to , via Syntagma, although most of the trains reverse at . The section from Dimotiko Theatro to the tunnel portal east of Doukissis Plakentias is underground, and the section from Doukissis Plakentias to Airport is shared with Athens Suburban Railway trains, implementing a form of the Karlsruhe model. It first opened, between and , on 28 January 2000, with Line 2. In 2012, construction works commenced for the latest underground extension of Line 3 to via which was completed on 10 October 2022. Rolling Stock Dual voltage ROTEM-supplied stock with greater luggage space is used for services to Athens International Airport. Line 3 rail vehicles utilize 750 V DC third rail current collection between Nikaia and Doukissis Plakentias, changing to 25 kV AC overhead catenary while operating on the Athens Suburban Railway for access to/from the airport. Extension to Piraeus On 1 March 2012 a contract was signed between Attiko Metro S.A. and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North River Tunnels
The North River Tunnels are a pair of rail tunnels that carry Amtrak and New Jersey Transit passenger lines under the Hudson River between Weehawken, New Jersey, and Pennsylvania Station in Manhattan, New York City, New York. Built between 1904 and 1908 by the Pennsylvania Railroad (PRR) to allow its trains to reach Manhattan, they opened for service in late 1910. The tunnels allow a maximum of 24 crossings per hour each way and operate near capacity during peak hours. The tunnels were damaged by flooding in 2012, causing frequent delays in train operations. In May 2014, Amtrak stated that within 20 years one or both of the tunnels would have to be shut down. In May 2021, the U.S. Department of Transportation (USDOT) approved construction of two new tunnels. The new tunnels are scheduled to open in 2035, with rehabilitation of the old tunnels completed by 2038. History Context The PRR had consolidated its control of railroads in New Jersey with the lease of United New Jersey Rai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East River Tunnels
The East River Tunnels are four single-track railroad passenger service tunnels that extend from the eastern end of Pennsylvania Station under 32nd and 33rd Streets in Manhattan and cross the East River to Long Island City in Queens. The tracks carry Long Island Rail Road (LIRR) and Amtrak trains travelling to and from Penn Station and points to the north and east. The tracks also carry New Jersey Transit trains deadheading to Sunnyside Yard. They are part of Amtrak's Northeast Corridor, used by trains traveling between New York City and New England via the Hell Gate Bridge. History Construction The tunnels were built in the first decade of the 20th century as part of the New York Tunnel Extension. The original plan for the extension which was published in June 1901, called for the construction of a bridge across Hudson River between 45th and 50th Streets in Manhattan, as well as two closely spaced terminals for the LIRR and Pennsylvania Railroad (PRR). This would all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Station (New York City)
Pennsylvania Station, also known as New York Penn Station or simply Penn Station, is the main intercity railroad station in New York City and the busiest transportation facility in the Western Hemisphere, serving more than 600,000 passengers per weekday . It is located in Midtown Manhattan, beneath Madison Square Garden in the block bounded by Seventh and Eighth Avenues and 31st and 33rd Streets, and in the James A. Farley Building, with additional exits to nearby streets. It is close to Herald Square, the Empire State Building, Koreatown, and Macy's Herald Square. Penn Station has 21 tracks fed by seven tunnels (the two North River Tunnels, the four East River Tunnels, and the single Empire Connection tunnel). It is at the center of the Northeast Corridor, a passenger rail line that connects New York City to Boston, Philadelphia, Washington, D.C., and intermediate points. Intercity trains are operated by Amtrak, which owns the station, while commuter rail services are ope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farringdon 3rd Rail AC Overhead
Farringdon may refer to: People * Nicholas de Farndone, 14th century Mayor of London Places London * Farringdon, London, an area of Clerkenwell which takes its name from ''Farringdon Station''. * Farringdon Road, a road in Clerkenwell, London * Farringdon Street, an extension of Farringdon Road into the City of London * Farringdon station, a railway station in Clerkenwell * Farringdon Within, a ward in the City of London * Farringdon Without, a ward in the City of London Other parts of the UK *Farringdon, Devon *Farringdon, Hampshire *Farringdon, Sunderland **Farringdon Community Sports College, a school in Farringdon, Sunderland Outside the UK *Farringdon, New South Wales, a locality in Australia See also * Faringdon, Oxfordshire, England * Faringdon, New Zealand, suburb of Rolleston, Canterbury, New Zealand * Farington (other) * Farrington (other) Farrington may refer to: Geography Places in the United Kingdom * Farrington, Dorset, England, a settle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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