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Dk4
The DK4 are a class of electrical multiple units built by Changchun Railway Vehicles, operated on the Pyongyang Metro, and later the Korean State Railway. The sets developed in parallel with the DK3, and these sets were delivered new to the Pyongyang Metro when it opened in September 1973, although they have since almost entirely disappeared from the metro network, with many sets being converted to be used under overhead catenary as electric multiple units, or as a locomotive. Design The DK4, in its original livery was fitted with three piece, wraparound front windows and painted in light green over darker green cut by either a yellow or red trim. It was the last resistor control metro car built by Changchun Railway Vehicles, as the DK6 and onwards used transistors for starting and braking. The overall design is related to the earlier , and metro sets, which the DK4 built off with incremental improvements. Originally, the DK4 was not designed with non-driving motor cars; i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean State Railway
The Korean State Railway (), commonly called the State Rail () is the operating arm of the Ministry of Railways of North Korea and has its headquarters at P'yŏngyang. The current Minister of Railways is Chang Jun Song. History 1945–1953: Liberation, Partition, and the Korean War The railway lines of North Korea were originally built during the Japanese occupation of Korea by the Chosen Government Railway (''Sentetsu''), the South Manchuria Railway (''Mantetsu'') and various privately owned railway companies such as the Chosen Railway (''Chōtetsu''). At the end of the Pacific War, in the territory of today's North Korea Sentetsu owned of railway, of which was standard gauge, and was narrow gauge; in the same territory, privately owned railway companies owned of rail lines, of which was standard gauge and was narrow gauge. At the same time, in September 1945 in the future territory of the DPRK there were 678 locomotives (124 steam tank, 446 tender, 99 narrow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kim Jong-tae Locomotive Works
The Kim Chong-t'ae Electric Locomotive Works () in P'yŏngyang is North Korea's largest manufacturer of railway equipment. Established in November 1945 in Sŏsŏng-guyŏk, P'yŏngyang near the P'yŏngyang Railway University and the Korean State Railway's West P'yŏngyang Station, the factory manufactures and overhauls electric and diesel locomotives, passenger cars, streetcars and subway trainsets. It is subordinate to the North Korean Ministry of Railways. History Initially established as a repair facility for rolling stock during the Japanese occupation of Korea, becoming the state-owned West P'yŏngyang Railway Factory on 10 November 1945. In 1960, the facility repaired 210 steam locomotives, 1,800 freight cars and 120 passenger cars. It was expanded with Polish assistance in the late 1950s to manufacture electric locomotives as well, with work on the manufacturing facility completed on 29 August 1959. In 1961 it was renamed P'yŏngyang Electric Locomotive Works, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Multiple Units Of China
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of positiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3000 V DC Multiple Units
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societies. Evolution of the Arabic digit The use of three lines to denote the number 3 occurred in many writing systems, including some (like Roman and Chinese numerals) that are still in use. That was also the original representation of 3 in the Brahmic (Indian) numerical notation, its earliest forms aligned vertically. However, during the Gupta Empire the sign was modified by the addition of a curve on each line. The Nāgarī script rotated the lines clockwise, so they appeared horizontally, and ended each line with a short downward stroke on the right. In cursive script, the three strokes were eventually connected to form a glyph resembling a with an additional stroke at the bottom: ३. The Indian digits spread to the Caliphate in the 9th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manpo
Manpo () is a city of northwestern Chagang Province, North Korea. As of 2008, it had an estimated population of 116,760. It looks across the border to the city of Ji'an, Jilin province, China. History Manp'o was incorporated as a city in October 1967. Earlier, in October 1949, it had been combined into a single county consisting Manpo-myon, Kosan-myon, Oegwi-myon, Iso-myon and Sijung-myon, which were split from Kanggye-gun. Manpo had first been mentioned in 1424, in the Veritable Records of the Joseon Dynasty. During the Joseon Dynasty, fortresses and camps were built in this area, for which the city is now named after. Geography Along the shores of the Yalu River, which various tributaries flow into, and the Kŏnp'o River are the small Kosan Plain and the Kŏnha Plain. The majority of Manpo is located at a lower height than the rest of Jagang Province, though the northeast and east do have areas of higher elevation, which gradually slopes down to the much lower areas along the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chagang Province
Chagang Province (Chagangdo; ) is a province in North Korea; it is bordered by China's Jilin and Liaoning provinces to the north, Ryanggang and South Hamgyong to the east, South Pyongan to the south, and North Pyongan to the west. Chagang was formed in 1949, after being demarcated from North Pyongan. The provincial capital is Kanggye. Before 2019, Chagang was the only province of North Korea completely inaccessible to tourists, possibly due to weapons factories and nuclear weapon facilities located there. In 2019 the city of Manpo became accessible to tourists. In May 2018, the province became a "Special Songun (military first) Revolutionary Zone" in relations to concealing the nuclear weapon and weapon's factories within the province. Geography Chagang Province is located in the northwestern part of Korea. It is a mountainous province; with the mountainous area amounting to 98 per cent of its total area. The mean height above sea level is 750 meters and the slope of most r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resistor
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Practical resistors as discrete components can be composed of various compounds and forms. Resisto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transformer
A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Transformers are used to change AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signal-processing circuits. Since the invention of the first constant-potential transfo ... [...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] |
BVG Class G
The Class G is an electric multiple unit train type used on the Berlin U-Bahn. They were originally developed for the of East-Berlin. Specifications Formation Each set consists of two cars, only one of which has a driving cab. Thus, the smallest operable formation is a four-car train. Up to four two-car sets can be operated together. File:Fahrerstand von Gisela.jpg, Driver's cab of a GI/1E train, April 2016 File:GI, Wagenende ohne Führerstand.jpg, Rear without driver's cab, March 1980 Electric systems The trains are powered by one self-ventilated motor per bogie. Both axles are powered through two hollow-shaft gears. Interior The interior features longitudinal seats. File:GI, Fahrgastraum.jpg, Interior, March 1980 File:U-Bahn Berlin Baureihe GI 1984.jpg, Interior, 1984 File:Innenraum U-Bahn-Baureihe GI-1E auf der Innotrans 2016.jpg, Refurbished interior, September 2016 History Twelve sets were lent to the Athens Metro between 1983 and 1985. Class GI trains replaced all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beijing 2042 For Drill
} Beijing ( ; ; ), alternatively romanized as Peking ( ), is the capital of the People's Republic of China. It is the center of power and development of the country. Beijing is the world's most populous national capital city, with over 21 million residents. It has an administrative area of , the third in the country after Guangzhou and Shanghai. It is located in Northern China, and is governed as a municipality under the direct administration of the State Council with 16 urban, suburban, and rural districts.Figures based on 2006 statistics published in 2007 National Statistical Yearbook of China and available online at archive. Retrieved 21 April 2009. Beijing is mostly surrounded by Hebei Province with the exception of neighboring Tianjin to the southeast; together, the three divisions form the Jingjinji megalopolis and the national capital region of China. Beijing is a global city and one of the world's leading centres for culture, diplomacy, politics, finance, busine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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