1.
Line H (Buenos Aires Underground)
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Line H of the Buenos Aires Underground, is the first entirely new line built in Buenos Aires since the opening of Line E on 20 June 1944. The first phase, between Plaza Once and Caseros, opened 18 October 2007, currently it stretches over 8 km between stations Hospitales and Las Heras. According to projections, the line will stretch a total of about 11.85 km and it connects the southern part of the city with the north, improving the flow to the centre of the city. It is also designed to serve as a line and provide cross-connections across all radial lines, mainly under the axis of Jujuy. The cars feature 42 seats and 4 doors per side, the first 6 of the 120 new Alstom cars arrived In August 2015, with the remainder arriving gradually, in time for the inauguration of the section of the line which connects it to Line D. An initial extension to Corrientes station was inaugurated on Monday 6 December 2010, the Córdoba and Las Heras stations opened in December 2015 with Santa Fe set to open in April 2016. This will also mean that the extension will be inaugurated along with the lines new Alstom Metropolis rolling stock, the final stretch to Retiro is not set to open until some time after since its trajectory must also be revised following the relocation of the Plaza Francia station. Subterráneos de Buenos Aires Metrovías S. A. Subte Operator Subterráneos de Buenos Aires, H Line System map
2.
Alstom
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A merger with parts of the General Electric Company plc formed GEC-Alstom in 1989, the company became Alstom in 1998. In 2014, Alstom and General Electric announced that a US$17 billion bid for the power and grid divisions had been made. The GE acquisition deal for the power and grid division was accepted by EU and US anticompetition authorities in mid 2015, in 1932, Alsthom expanded into transportation by acquiring Constructions Electriques de France, Tarbes, a manufacturer of electric locomotives as well as electrical and hydraulic equipment. In 1969, Compagnie Générale dElectricité became the majority shareholder of Alsthom, in 1976, Alsthom merged with Chantiers de lAtlantique, becoming Alsthom Atlantique. Thus, the business expanded into marine, the next year, it constructed the first 1300 MW generator set for the Paluel power station, setting a world record with an output of 1500 MW. In 1978, Alsthom delivered its first TGV to SNCF, the TGV went on to break world rail speed records in 1981 and in 1990. It also set the endurance record for high-speed train lines in 2001. In 1986, Alsthom Belfort received an order from EDF for the largest gas turbine in the world, in 1988–89, holding company CGEE Alstom acquired ACEC Energie and ACEC Automatisme from the dissolution of Belgian electrical engineering company ACEC SA. Alstom acquired 100% of ACECs transport division, renaming it ACEC Transport, in 1991, Alstoms parent company CGE was renamed Alcatel Alsthom Compagnie Générale dElectricité, or Alcatel Alsthom for short. In 1994, GEC Alsthom acquired the vehicle manufacturer Linke-Hofmann-Busch from Salzgitter AG. In 1995, the acquired the remaining shares in the steam turbine manufacturer MAN Energie. In early 1998, GEC Alsthom acquired the electrical contractor Cegelec, in 1998, GEC-Alsthom bought Italian firm SASIB SpAs rail signalling subsidiary Sasib Railways, which included the former General Railway Signal. In June 1998, GEC Alsthom was listed on the Paris Stock Exchange, GEC, at the same time, the company name was changed to Alstom. In 1999, Alstoms energy division merged with ABB in a 50–50 joint company known as ABB Alstom Power, Alstom also bought Canadas Télécité, a passenger information and security solutions company, and sold its heavy-duty gas turbine business to General Electric. The next year, it bought out ABBs share in ABB Alstom Power, in 2000, Alstom sold its diesel engine businesses to MAN Group. It also acquired a 51% stake in Fiat Ferroviaria, the Italian rail manufacturer, in April 2003, Alstom sold its industrial turbine business to Siemens for €1.1 billion. By 2003, Alstom was facing a crisis due to poor sales and over $5 billion of debt liabilities. Alstoms share price had dropped 90% over two years, in 2004, the French state took a 21% stake in Alstom and received an EU-approved French government bailout worth €2.5 billion
3.
Alstom Metropolis
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Alstom Metropolis is a metro trainset by Alstom. Amsterdam ordered 23 Metropolis trains, the first one came into operation June 2013, Xiamen also ordered some Metropolis trainsets for the Xiamen Metro. Trains can be run in configurations of 2 to 10 cars using manned or unmanned operations, some New York City Subway cars use technology from the Metropolis family, such as the Alstom ONIX traction motors in the R142 and R160A/B, but are not classified as Metropolis trainsets. Glass used for the windows on the cars are produced by Sekurit Saint-Gobain and is called Climavit and it is claimed to reduce noise level in the cars by 5 decibels. It is also double-glazed to provide comfort for passengers in the cars, glass used on the doors of the cars are produced by Starglass
4.
Line D (Buenos Aires Underground)
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Line D of the Buenos Aires Underground runs from Catedral to Congreso de Tucumán. The D Line opened on 3 June 1937 and has expanded to the north several times. The line is currently 11 km long and has 16 stations, Line D was the second line to be built by the Hispanic-Argentine Company for Public Works and Finances, following the construction of Line C in 1934. Construction began in 1935 and the first part of the line was inaugurated in 1937, three years later, the section which brought the line to Plaza Italia in Palermo was completed, bringing the length of the line to 6.5 km. The line was not properly extended until 1993 when it was extended to Ministro Caranza, over the decades it has been discussed numerous times whether to extend the line out to the limits of the city proper. The last of these proposals came forward in 2002 which would have seen an additional two added to the line. However, this was abandoned since the line was already at full capacity after the opening of Congreso de Tucumán station. Line D is the line in the network which will not be extended as part of the most recent expansion plan. Until the privatisation of the underground in the 1990s, Line D was identified by the red colour, Line D carries out cultural activities on stations Juramento, Congreso de Tucumán and Olleros. The lending of the facilities is free for the museum. Line D was originally served by Siemens-Schuckert Orenstein & Koppel rolling stock, in 1999, cars from the Nagoya Municipal Subway were purchased second hand from Japan and incorporated into the line. More 100 Series cars continued to be purchased in that decade up until 2009, the remaining Nagoya cars were moved to Line C in 2007 and replaced with the 100 Series cars and with Fiat-Materfer cars. In September 2015, at a conference in Brazil, the head of SBASE gave a presentation in which the number of new cars to be purchased for the line was 84 instead of 30. By 2016, the figure had been fixed at 60 new cars. Subterráneos de Buenos Aires Metrovías S. A. Subte Operator Subterráneos de Buenos Aires, D Line System map
5.
Buenos Aires Underground
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The Buenos Aires Underground, locally known as Subte, is a mass transit metro system that serves the area of the city of Buenos Aires, Argentina. Currently, the underground networks six lines—A, B, C, D, E, the network is complemented by the 7.4 km long Premetro line, and the 26 km long Urquiza suburban line, with 17 more stations in total. As of 2015, the underground also has 4 closed stations, over a million passengers use the network, which also provides connections with the citys extensive commuter rail and bus rapid transport networks. The network expanded rapidly during the decades of the 20th century, by 1944 its main routes were completed. The pace of expansion fell sharply after the Second World War, in the late 1990s expansion resumed at a quicker pace, and four new lines were planned for the network. Despite this, the expansion has been largely exceeded by the transportation needs of the city and is said to be overcrowded. The entire network was nationalised in 1939, remaining in state hands, the Subte opened in 1913, becoming the 13th underground system in the world, as well as the first in Latin America, the Southern Hemisphere and the Hispanophone, followed by the Madrid Metro in 1919. The network was built and operated by three separate private companies and later nationalised in 1939. In 1952 it was absorbed by a state administration, in 1963 it became the property of a newly founded company. All the Underground lines, along with the Urquiza Line and Premetro were offered as 20-year concessions to interested private parties, by 1995, Metrovías took over the Subte under a $395 million plan. In this context, the first proposals for the building of a system were made, along with requests for government grants, first, in 1886. However, the Ministry of Interior denied the city administration the power to license building in the subsoil and for this reason. The first Underground line was opened on 1 December 1913 and was built by the Anglo-Argentine Tramways Company and that line was made up of one of the existing sections of Line A, linking the stations of Plaza de Mayo and Plaza Miserere. 170,000 passengers took part in the lines first trip, on 1 April 1914 the line was to expand to Río de Janeiro station and on 1 July was extended to Primera Junta Station. In 1912 the Lacroze Hermanos company won a concession to build another Underground line, the company was a competitor to the Anglo-Argentine company, operating tramways in Buenos Aires as well as the Buenos Aires Central Railway, which later became part of the Urquiza Line. Construction began in 1927 and this line became Line B when it was inaugurated on 17 October 1930, during 17–18 December 380,000 passengers travelled on the lines then 32 cars. By this point, the AATC had only built 48 metres of what is today Line C, in 1933 a third company, the Hispano-Argentina Company of Public Works and Finances began construction of the other Underground lines. Line Cs first section, Constitución railway station-Diagonal Norte, was inaugurated on 9 November 1934 by Agustín P. Justo, then President of Argentina
6.
Head-end power
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In rail transport, head-end power or electric train supply is the electrical power distribution system on a passenger train. The power source, usually a locomotive at the front or head of a train, provides the electricity used for lighting, electrical, the maritime equivalent is hotel electric power. Oil lamps were introduced in 1842 to light trains, economics drove the Lancashire and Yorkshire Railway to replace oil with coal gas lighting in 1870, but a gas cylinder explosion on the train led them to abandon the experiment. Oil-gas lighting was introduced in late 1870, high steam consumption led to abandonment of the system. Three trains were started in 1883 by London, Brighton and South Coast Railway with electricity generated on board using a dynamo driven from one of the axles and this charged a lead-acid battery in the guards van, who operated and maintained the equipment. The system successfully provided electric lighting in the train and this accident prompted railways to adopt electricity for lighting the trains. Starting in the 1930s, air conditioning became available on railcars, with the energy to run them being provided by mechanical power take offs from the axle, small dedicated engines or propane. The resulting separate systems of lighting power, steam heat, and engine-driven air conditioning increased the maintenance workload, head-End Power would allow for a single power source to handle all these functions and more for an entire train. Originally, trains hauled by a locomotive would be provided with a supply of steam from the locomotive for heating the carriages. When diesel locomotives and electric locomotives replaced steam, the heating was then supplied by a steam-heat boiler. This was oil-fired or heated by an electric element, later carriage designs abolished the steam-heat apparatus, and made use of the ETH supply for heating, lighting, ventilation, air conditioning, fans, sockets and kitchen equipment in the train. In recognition of this ETH was eventually renamed Electric Train Supply, each coach has an index relating to the maximum consumption of electricity that it could use. The sum of all the indices must not exceed the index of the locomotive, one ETH index unit equals 5 kW, a locomotive with an ETH index of 95 can supply 475 kW of electrical power to the train. In response, the railroad installed higher capacity generators on the assigned to these trains. The cars used steam from the locomotive for heating, when diesel locomotives were introduced to passenger service, they were equipped with steam generators to provide steam for car heating. However, the use of generators and batteries persisted for many years. This was an evolution, as their commuter trains were already receiving low-voltage. While many commuter fleets were quickly converted to HEP, long-distance trains continued to operate with steam heat, five Amtrak E8s were rebuilt with HEP generators for this purpose
7.
Volt
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The volt is the derived unit for electric potential, electric potential difference, and electromotive force. One volt is defined as the difference in potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. It is also equal to the difference between two parallel, infinite planes spaced 1 meter apart that create an electric field of 1 newton per coulomb. Additionally, it is the difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can also be expressed as amperes times ohms, watts per ampere, or joules per coulomb, for the Josephson constant, KJ = 2e/h, the conventional value KJ-90 is used, K J-90 =0.4835979 GHz μ V. This standard is typically realized using an array of several thousand or tens of thousands of junctions. Empirically, several experiments have shown that the method is independent of device design, material, measurement setup, etc. in the water-flow analogy sometimes used to explain electric circuits by comparing them with water-filled pipes, voltage is likened to difference in water pressure. Current is proportional to the diameter of the pipe or the amount of water flowing at that pressure. A resistor would be a reduced diameter somewhere in the piping, the relationship between voltage and current is defined by Ohms Law. Ohms Law is analogous to the Hagen–Poiseuille equation, as both are linear models relating flux and potential in their respective systems, the voltage produced by each electrochemical cell in a battery is determined by the chemistry of that cell. Cells can be combined in series for multiples of that voltage, mechanical generators can usually be constructed to any voltage in a range of feasibility. High-voltage electric power lines,110 kV and up Lightning, Varies greatly. Volta had determined that the most effective pair of metals to produce electricity was zinc. In 1861, Latimer Clark and Sir Charles Bright coined the name volt for the unit of resistance, by 1873, the British Association for the Advancement of Science had defined the volt, ohm, and farad. In 1881, the International Electrical Congress, now the International Electrotechnical Commission and they made the volt equal to 108 cgs units of voltage, the cgs system at the time being the customary system of units in science. At that time, the volt was defined as the difference across a conductor when a current of one ampere dissipates one watt of power. The international volt was defined in 1893 as 1/1.434 of the emf of a Clark cell and this definition was abandoned in 1908 in favor of a definition based on the international ohm and international ampere until the entire set of reproducible units was abandoned in 1948. Prior to the development of the Josephson junction voltage standard, the volt was maintained in laboratories using specially constructed batteries called standard cells
8.
Direct current
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Direct current is a flow of electrical charge carriers that always takes place in the same direction. The current need not always have the magnitude, but if it is to be defined as dc. This contrasts with alternating current which varies the direction of flow, sources of direct current include power supplies, electrochemical cells and batteries, and photovoltaic cells and panels. The intensity, or amplitude, of a direct current might fluctuate with time, in some such cases the dc has an ac component superimposed on it. An example of this is the output of a cell that receives a modulated light communications signal. A source of dc is sometimes called a dc generator, batteries and various other sources of dc produce a constant voltage. This is called pure dc and can be represented by a straight, the peak and effective values are the same. The peak to peak value is zero because the instantaneous amplitude never changes, in some instances the value of a dc voltage pulsates or oscillates rapidly with time, in a manner similar to the changes in an ac wave. The unfiltered output of a wave or a full wave rectifier. In 1820, Hans Christian Orsted discovered that electrical current creates a magnetic field and this discovery made scientists relate magnetism to the electric phenomena. In 1879, Thomas Edison invented the light bulb. He improved a 50-year-old idea using lower current electricity, a vacuum inside the globe and a small carbonized filament. At that time, the idea of lightning was not new. Edison not only invented an incandescent electric light, but an electric lighting system contained all the necessary elements to make the incandescent light safe, economical. Prior to 1879, direct current electricity had been used in lighting for the outdoors and it was in the 1880s when the modern electric utility industry began. It was an evolution from street lighting systems and from gas and it was located in Lower Manhattan, on Pearl Street. This station provided light and electricity to customers in a one square mile range, the station was called Thomas Edisons Pearl Street Electricity Generating Station. This station introduced four elements of an electric utility system, Efficient distribution, competitive price, reliable central generation
9.
Overhead line
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An overhead line or overhead wire is 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, the feeder stations are usually fed from a high-voltage electrical grid. Electric trains that collect their current from overhead lines use a device such as a pantograph and it presses against the underside of the lowest overhead wire, the contact wire. Current collectors are electrically conductive and allow current to flow through to the train or tram, non-electric locomotives may pass along these tracks without affecting the overhead line, although there may be difficulties with overhead clearance. Alternative electrical power transmission schemes for trains include third rail, ground-level power supply, batteries and this article does not cover regenerative braking, where the traction motors act as generators to retard movement and return power to the overhead. To achieve good high-speed current collection, it is necessary to keep the wire geometry within defined limits. This is usually achieved by supporting the wire from a second wire known as the messenger wire or catenary. This wire approximates the path of a wire strung between two points, a catenary curve, thus the use of catenary to describe this wire or sometimes the whole system. This wire is attached to the wire at regular intervals by vertical wires known as droppers or drop wires. It is supported regularly at structures, by a pulley, link, the whole system is then subjected to a mechanical tension. As the contact wire makes contact with the pantograph, the insert on top of the pantograph is worn down. The straight wire between supports will cause the wire to cross over the whole surface of the pantograph as the train travels around the curve, causing uniform wear. On straight track, the wire is zigzagged slightly to the left. The movement of the wire across the head of the pantograph is called the sweep. The zigzagging of the line is not required for trolley poles. Depot areas tend to have only a wire and are known as simple equipment or trolley wire. When overhead line systems were first conceived, good current collection was only at low speeds. Compound equipment - uses a second wire, known as the auxiliary
10.
Track gauge
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In rail transport, track gauge is the spacing of the rails on a railway track and is measured between the inner faces of the load-bearing rails. All vehicles on a network must have running gear that is compatible with the track gauge, as the dominant parameter determining interoperability, it is still frequently used as a descriptor of a route or network. There is a distinction between the gauge and actual gauge at some locality, due to divergence of track components from the nominal. Railway engineers use a device, like a caliper, to measure the actual gauge, the nominal track gauge is the distance between the inner faces of the rails. In current practice, it is specified at a distance below the rail head as the inner faces of the rail head are not necessarily vertical. In some cases in the earliest days of railways, the company saw itself as an infrastructure provider only. Colloquially the wagons might be referred to as four-foot gauge wagons, say and this nominal value does not equate to the flange spacing, as some freedom is allowed for. An infrastructure manager might specify new or replacement track components at a variation from the nominal gauge for pragmatic reasons. Track is defined in old Imperial units or in universally accepted metric units or SI units, Imperial units were established in United Kingdom by The Weights and Measures Act of 1824. In addition, there are constraints, such as the load-carrying capacity of axles. Narrow gauge railways usually cost less to build because they are lighter in construction, using smaller cars and locomotives, as well as smaller bridges, smaller tunnels. Narrow gauge is often used in mountainous terrain, where the savings in civil engineering work can be substantial. Broader gauge railways are generally expensive to build and require wider curves. There is no single perfect gauge, because different environments and economic considerations come into play, a narrow gauge is superior if ones main considerations are economy and tight curvature. For direct, unimpeded routes with high traffic, a broad gauge may be preferable, the Standard, Russian, and 46 gauges are designed to strike a reasonable balance between these factors. In addition to the general trade-off, another important factor is standardization, once a standard has been chosen, and equipment, infrastructure, and training calibrated to that standard, conversion becomes difficult and expensive. This also makes it easier to adopt an existing standard than to invent a new one and this is true of many technologies, including railroad gauges. The reduced cost, greater efficiency, and greater economic opportunity offered by the use of a common standard explains why a number of gauges predominate worldwide
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