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FS Class E.626
The FS E.625 and E.626 are two classes of Italian electric locomotives produced for the Ferrovie dello Stato. They were introduced in the course of the 1920s and remained in service until the 1990s. The E.626 was the first locomotive fed by 3,000 V DC overhead line in Italy. History The E.626 class is the result of a requirement issued in 1926 by the Ferrovie dello Stato (FS, Italian Railways) for a new locomotive to be used under the new 3,000 V DC line being built between Foggia and Benevento.The previous electrified lines of Italy used 15 kV, 16.7 Hz AC. The 3,000 V is currently the standard system in service, apart some High Speed lines fed at 25 kV AC. The design was carried out by the team of Giuseppe Bianchi, the "founder" of modern Italian railways, at the FS Traction and Material Service in Florence. The requirement specified the locomotive should have six traction axles, to improve adhesion on steep lines. The E.626 series totalled 448 units in three series, each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Definition One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units ( m, kg, s, and A) as : \text = \frac = \frac = \frac. It can also be expressed as amperes times ohms (current times resistance, Ohm's law), webers per second (magnetic flux per time), watts per ampere (power per current), or joules per coulomb (energy per charge), which is also equivalent to electronvolts per elementary charge: : \text = \text\Omega = \fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Locomotive
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor. Locomotives with on-board fuelled prime movers, such as diesel engines or gas turbines, are classed as diesel-electric or gas turbine-electric and not as electric locomotives, because the electric generator/motor combination serves only as a power transmission system. Electric locomotives benefit from the high efficiency of electric motors, often above 90% (not including the inefficiency of generating the electricity). Additional efficiency can be gained from regenerative braking, which allows kinetic energy to be recovered during braking to put power back on the line. Newer electric locomotives use AC motor-inverter drive systems that provide for regenerative braking. Electric locomotives are quiet compared to diesel locomotives since there is no engine and exhaust noise and less mechanical noise. The lack o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FS Class E636
The FS E.636 is a class of Italian articulated electric locomotives. They were introduced in the course of the 1940s until the 1960s, and have been decommissioned since 2006. They have been one of the most numerous Italian locomotive group, and have been widely employed during their long career, hauling every type of train, ranging from freight to long range passenger services. Their introduction also saw the employment of some revolutionary (for the time) design concepts, such as the articulated carbody and the three bogies scheme. History The E.636 was designed to overcome the problems showed in the 1930s by both the E.626 multi-purpose and E.326 high-speed locomotives, in order to better handle the increasing railway traffic in Italy. The E.636 was the first Italian locomotive adopting the Bo-Bo-Bo configuration with chassis divided into two articulated parts pivoting on the central bogie, which is very well suited for the often tortuous lines of Italy and that would ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JŽ Series 361
Yugoslav Railways ( sh-Latn-Cyrl, Jugoslavenske željeznice/Jugoslovenske železnice, Југославенске жељезнице/Југословенске железнице; mk, Југословенски железници; sl, Jugoslovanske železnice), with standard acronym JŽ ( in Cyrillic), was the state railway company of Yugoslavia, operational from the 1920s to the 1990s, with its final incarnation transferring to Serbia, the successor of JZ is the joint stock company of the Serbian Railways in 2006. History The company was first founded as the National Railways of the Kingdom of the Serbs, Croats and Slovenes (SCS) by incorporating the already existing railway companies and assets in 1918. In 1929, it was renamed along with the country to Yugoslav State Railways (JDŽ). In 1941 the railway ceased to exist and two new railway companies were created: Croatian State Railways (HDŽ) and Serbian State Railways (SDŽ). The railway was reestablished after World War II. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rheostat
A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name. Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. Potentiometers operated by a mechanism can be used as position transducers, for example, in a joystick. Potentiometers are rarely used to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be comparable to the power in the controlled load. Nomenclature There are a number of terms in the electronics industry used to describe certain types of potentiometers: * slide pot or slider pot: a potentiomete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Series And Parallel Circuits
Two-terminal components and electrical networks can be connected in series or parallel. The resulting electrical network will have two terminals, and itself can participate in a series or parallel topology. Whether a two-terminal "object" is an electrical component (e.g. a resistor) or an electrical network (e.g. resistors in series) is a matter of perspective. This article will use "component" to refer to a two-terminal "object" that participate in the series/parallel networks. Components connected in series are connected along a single "electrical path", and each component has the same current through it, equal to the current through the network. The voltage across the network is equal to the sum of the voltages across each component. Components connected in parallel are connected along multiple paths, and each component has the same voltage across it, equal to the voltage across the network. The current through the network is equal to the sum of the currents through eac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manchester
Manchester () is a city in Greater Manchester, England. It had a population of 552,000 in 2021. It is bordered by the Cheshire Plain to the south, the Pennines to the north and east, and the neighbouring city of Salford to the west. The two cities and the surrounding towns form one of the United Kingdom's most populous conurbations, the Greater Manchester Built-up Area, which has a population of 2.87 million. The history of Manchester began with the civilian settlement associated with the Roman fort ('' castra'') of ''Mamucium'' or ''Mancunium'', established in about AD 79 on a sandstone bluff near the confluence of the rivers Medlock and Irwell. Historically part of Lancashire, areas of Cheshire south of the River Mersey were incorporated into Manchester in the 20th century, including Wythenshawe in 1931. Throughout the Middle Ages Manchester remained a manorial township, but began to expand "at an astonishing rate" around the turn of the 19th century. Manchest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Florence
Florence ( ; it, Firenze ) is a city in Central Italy and the capital city of the Tuscany Regions of Italy, region. It is the most populated city in Tuscany, with 383,083 inhabitants in 2016, and over 1,520,000 in its metropolitan area.Bilancio demografico anno 2013, datISTAT/ref> Florence was a centre of Middle Ages, medieval European trade and finance and one of the wealthiest cities of that era. It is considered by many academics to have been the birthplace of the Renaissance, becoming a major artistic, cultural, commercial, political, economic and financial center. During this time, Florence rose to a position of enormous influence in Italy, Europe, and beyond. Its turbulent political history includes periods of rule by the powerful House of Medici, Medici family and numerous religious and republican revolutions. From 1865 to 1871 the city served as the capital of the Kingdom of Italy (established in 1861). The Florentine dialect forms the base of Italian language, Stan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giuseppe Bianchi (engineer)
Giuseppe Bianchi (26 August 1888 – Milan, 20 July 1969) was an Italian railway engineer on the Ferrovie dello Stato between 1913 and 1946. Life Born at Imola, Bianchi graduated in electrical mechanical engineering at the University of Turin in 1912. Offered a job by Ferrovie dello Stato, the operator of the Italian rail network, he was first assigned to the select committee for the electrification of Rome. In 1920 Bianchi was transferred to the office for locomotive research within the Servizio materiale e trazione (Rolling Stock and Locomotive Service) at Florence (where it still resides, under a different name). Although Bianchi distinguished himself through projects involving steam locomotives for mainline services (like the three variations of the planned Class 695 for Ferrovie dello Stato, as well as the Class 691 obtained by rebuilding the Class 690), his work was central to the transition from steam to electric power. As the limitations of using three phase alternat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-speed Rail
High-speed rail (HSR) is a type of rail system that runs significantly faster than traditional rail, using an integrated system of specialised rolling stock and dedicated tracks. While there is no single standard that applies worldwide, lines built to handle speeds above or upgraded lines in excess of are widely considered to be high-speed. The first high-speed rail system, the Tōkaidō Shinkansen, began operations in Japan in 1964 and was widely known as the bullet train. High-speed trains mostly operate on standard gauge tracks of continuously welded rail on grade-separated rights of way with large radii. However, certain regions with wider legacy railways, including Russia and Uzbekistan, have sought to develop a high speed railway network in Russian gauge. There are no narrow gauge high-speed trains; the fastest is the Cape gauge Spirit of Queensland at . Many countries have developed, or are currently building, high-speed rail infrastructure to connect major c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
15 KV AC Railway Electrification
Railway electrification systems using at are used on transport railways in Germany, Austria, Switzerland, Sweden, and Norway. The high voltage enables high power transmission with the lower frequency reducing the losses of the traction motors that were available at the beginning of the 20th century. Railway electrification in late 20th century tends to use AC systems which has become the preferred standard for new railway electrifications but extensions of the existing networks are not completely unlikely. In particular, the Gotthard Base Tunnel (opened on 1 June 2016) still uses 15 kV, 16.7 Hz electrification. Due to high conversion costs, it is unlikely that existing systems will be converted to despite the fact that this would reduce the weight of the on-board step-down transformers to one third that of the present devices. History The first electrified railways used series-wound DC motors, first at 600 V and then 1,500 V. Areas with 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benevento
Benevento (, , ; la, Beneventum) is a city and '' comune'' of Campania, Italy, capital of the province of Benevento, northeast of Naples. It is situated on a hill above sea level at the confluence of the Calore Irpino (or Beneventano) and the Sabato. In 2020, Benevento has 58,418 inhabitants. It is also the seat of a Catholic archbishop. Benevento occupies the site of the ancient Beneventum, originally Maleventum or even earlier Maloenton. The meaning of the name of the town is evidenced by its former Latin name, translating as good or fair wind. In the imperial period it was supposed to have been founded by Diomedes after the Trojan War. Due to its artistic and cultural significance, the Santa Sofia Church in Benevento was declared a UNESCO World Heritage Site in 2011, as part of a group of seven historic buildings inscribed as Longobards in Italy, Places of Power (568–774 A.D.). A patron saint of Benevento is Saint Bartholomew, the Apostle, whose relics are kept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
