|
China Railways SS1
The Shaoshan 1 ( Nickname: ) is a type of AC-powered electric locomotive used by China Railway. This locomotive was the first Chinese electric main line locomotive, built by the Zhuzhou Electric Locomotive Works with the assistance of the Soviet Union and following the design of the Soviet-H60 electric locomotive (SŽD VL60). The power supply was industrial-frequency single-phase AC, and the axle arrangement Co-Co. History The first prototype locomotive, 6Y1-001, which used an ignitron-controlled rectifier, was produced in 1958. A further 6 prototypes (002 to 007) were produced between 1962 and 1966. A silicon semiconductor-controlled rectifier was used from No. 004 onwards. In response to technology of the French-made 6Y2 locomotive, Zhuzhou Plant made major modification in the design of the 6Y1 locomotive, improving the reliability of the rectifier, traction motors and rheostatic braking system. The eighth locomotive, No. 008, was produced in 1968. The series was also renamed fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zhuzhou Electric Locomotive Works
CRRC Zhuzhou Locomotive Co., Ltd. is one of the electric locomotive manufacturers in China. It is one of the subsidiaries of CRRC. History Predecessor Zhuzhou Electric Locomotive Works was founded in 1936. CRRC Zhuzhou Locomotive Co., Ltd. On 31 August 2005, CSR Group Zhuzhou Electric Locomotive Co., Ltd. was spin-off from the locomotive works; the original legal entity of the locomotive works became an intermediate holding company for CSR Group only. After the formation of listed company CSR Corporation Limited, the limited company "CSR Group Zhuzhou Electric Locomotive" became part of the listed portion of the group, and the intermediate holding company remained unlisted. The limited company also renamed to CSR Zhuzhou Electric Locomotive Co., Ltd., In 2015 the company was renamed into CRRC Zhuzhou Locomotive Co., Ltd. (). Joint ventures Siemens Traction Equipment Ltd. (STEZ), is a joint venture between Siemens Mobility, Siemens (50%), Zhuzhou CRRC Times Electric (30%) and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
25 KV 50 Hz 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 Rail transport in Hungary, Hungary and in the Black Forest in Rail transport in Germany, 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 engi ... [...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] |
China Railway
China State Railway Group Company, Ltd., doing business as China Railway (CR), is the national passenger and freight railroad corporation of the People's Republic of China. China Railway operates passenger and freight transport throughout China with 18 regional subsidiaries. By September 2022, the total assets of China Railway Group are CNY 9.06 trillion (USD 1.24 trillion). History Under the Chinese Corporate Law, China Railway Corporation was reorganized into China State Railway Group Co., Ltd. on June 18, 2019, instead of Industrial Enterprises Owned by the Whole People. This meant the Ministry of Finance would act as an investor on behalf of the state and the company would be led by a board and managed by board-chosen executives. Logo The China Railway logo was designed by Chen Yuchang () (1912–1969), officially adopted on 22 January 1950. The whole logo represents the front of a locomotive. The upper part of the logo represents the Chinese character 人 (people), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ignitron
An ignitron is a type of gas-filled tube used as a controlled rectifier and dating from the 1930s. Invented by Joseph Slepian while employed by Westinghouse, Westinghouse was the original manufacturer and owned trademark rights to the name "Ignitron". Ignitrons are closely related to mercury-arc valves but differ in the way the arc is ignited. They function similarly to thyratrons; a triggering pulse to the igniter electrode turns the device "on", allowing a high current to flow between the cathode and anode electrodes. After it is turned on, the current through the anode must be reduced to zero to restore the device to its nonconducting state. They are used to switch high currents in heavy industrial applications. Construction and operation An ignitron is usually a large steel container with a pool of mercury in the bottom that acts as a cathode during operation. A large graphite or refractory metal cylinder, held above the pool by an insulated electrical connection, serves as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rectifier
A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The reverse operation (converting DC to AC) is performed by an Power inverter, inverter. The process is known as ''rectification'', since it "straightens" the direction of current. Physically, rectifiers take a number of forms, including Vacuum tube#Diodes, vacuum tube diodes, wet chemical cells, mercury-arc valves, stacks of copper and selenium rectifier, selenium oxide plates, Diode#Semiconductor diodes, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motor-generator sets have been used. Early radio receivers, called crystal radios, used a "Cat's-whisker detector, cat's whisker" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or "crystal detec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shaoshan
Shaoshan () is a county-level city in Hunan Province, China. It is under the administration of the prefecture-level city of Xiangtan. Qingxi Town is its seat. Located on the mid-eastern Hunan and the mid-north of Xiangtan, Shaoshan is bordered by Ningxiang County to the north, Xiangxiang City to the west and southwest, Xiangtan County to the east and southeast. It covers an area of , as of 2015, it has a census registered population of 118,236 and a permanent resident population of 97,800. oxiangtan.gov.cn/ref> It is the smallest administrative unit by size or by population in the counties and county-level cities in Hunan province. As the birthplace of Mao Zedong, the founder of the People's Republic of China, Shaoshan was an important base during the Chinese Communist Revolution. It is also the birthplace of Mao's Family Restaurant, a restaurant chain that has spread to many other cities. Mao remains a popular figure in the area, and red tourism to Shaoshan and other places r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mao Zedong
Mao Zedong pronounced ; also romanised traditionally as Mao Tse-tung. (26 December 1893 – 9 September 1976), also known as Chairman Mao, was a Chinese communist revolutionary who was the founder of the People's Republic of China (PRC), which he led as the chairman of the Chinese Communist Party from the establishment of the PRC in 1949 until his death in 1976. Ideologically a Marxist–Leninist, his theories, military strategies, and political policies are collectively known as Maoism. Mao was the son of a prosperous peasant in Shaoshan, Hunan. He supported Chinese nationalism and had an anti-imperialist outlook early in his life, and was particularly influenced by the events of the Xinhai Revolution of 1911 and May Fourth Movement of 1919. He later adopted Marxism–Leninism while working at Peking University as a librarian and became a founding member of the Chinese Communist Party (CCP), leading the Autumn Harvest Uprising in 1927. During the Chinese Civil War ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southwest Jiaotong University
Southwest Jiaotong University () is located in national central city Chengdu, Sichuan Province, affiliated to the Ministry of Education of the People's Republic of China. It's a national key university co-supported by the Ministry of Education of China, China Railway Corporation, Sichuan Provincial Government and Chengdu City. SWJTU was founded in 1896 and is one of China 's leading engineering universities. Known as the cradle of China's railway engineers and “the Cornell of the East”, SWJTU is the birthplace of China's modern education in transportation, mining & metallurgy, and civil engineering. Through its history, the university has adopted different names such as “Imperial Chinese Railway College”, “Tangshan Jiaotong University” and “Tangshan Institute of Railway”. SWJTU is consistently ranked as one of the top universities in China, placing 181-190 in The ''Times Higher Education'' Asia University Rankings 2016 and ranking 161 in The ''Times Higher E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
25 KV AC Locomotives
5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. It has attained significance throughout history in part because typical humans have five digits on each hand. In mathematics 5 is the third smallest prime number, and the second super-prime. It is the first safe prime, the first good prime, the first balanced prime, and the first of three known Wilson primes. Five is the second Fermat prime and the third Mersenne prime exponent, as well as the third Catalan number, and the third Sophie Germain prime. Notably, 5 is equal to the sum of the ''only'' consecutive primes, 2 + 3, and is the only number that is part of more than one pair of twin primes, ( 3, 5) and (5, 7). It is also a sexy prime with the fifth prime number and first prime repunit, 11. Five is the third factorial prime, an alternating factorial, and an Eisenstein prime with no imaginary part and real part of the for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Co-Co Locomotives
Co-Co is the wheel arrangement for diesel or electric locomotives with two six-wheeled bogies with all axles powered, with a separate traction motor per axle. The equivalent UIC classification (Europe) for this arrangement is Co′Co′, or C-C for AAR (North America). Use Co-Cos are most suited to freight work as the extra wheels give them good traction. They are also popular because the greater number of axles results in a lower axle load to the track. History The first mainline diesel-electric locomotives were of Bo-Bo arrangement. As they grew in power and weight, from 1937 the EMD E-units used an A1A-A1A layout with six axles to reduce axle load, but only four of them were powered. After WWII, the British LMS ordered two prototype locomotives with some of the first Co-Co arrangements. The first C-C design recorded was a narrow-gauge Hornsby opposed-piston Hornsby-Akroyd-engined locomotive of 1903 for the Chattenden and Upnor Railway. There was a two-speed mec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Overhead Line")
