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Miesbach–Munich Power Transmission
Miesbach–Munich Power Transmission of 1882 was the first Note the voltage of 1,400 V transmission of direct current (DC) electrical energy over a large distance (57 km). After the first International Exposition of Electricity was held in Paris in 1881, the German Empire set up a power transmission between a steam engine situated near Miesbach and the glass palace of Munich, where an electricity exhibition opened on September 16, 1882. The voltage used was 2000 V direct current, and the distance 57 kilometres. Only 2.5 kilowatts of power (about 1.25 Ampere) was transmitted, which was used to run an artificial waterfall. The system was designed by Oskar von Miller and Marcel Deprez. A simple iron telegraph wire was used, which failed a few days later. In later years, Deprez set up a 112 km long DC transmission in France between Creil and Paris, using 6 kV. On August 25, 1891, the Lauffen-Frankfurt Three Phase AC Transmission over 175 km became part of the International Elect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oskar Von Miller
Oskar von Miller (7 May 1855 – 9 April 1934) was a German engineer and founder of the Deutsches Museum, a large museum of technology and science in Munich. Biography Born in Munich into an Upper Bavarian family from Aichach, he was the son of the first supervisor of the royal ore foundry in Munich, Ferdinand von Miller (1813–1887) and his wife Anna Pösl (1815–1890). Miller married the painter Marie Seitz in 1884, with whom he had seven children, two of whom died in infancy. His brother was the ore caster and director of the Academy of Fine Arts Munich, Munich Academy of Fine Arts Ferdinand Freiherr von Miller, Baron Ferdinand von Miller. With the elevation of his father Ferdinand into the Bavarian nobility on 12 October 1875 and with the inscription of the family name on the roll of the aristocracy of the Kingdom of Bavaria on 30 December 1875, Oskar was simultaneously ennobled. Miller decided to study technology and civil engineering at the Technical University of Mun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Power Transmission Systems In Germany
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] |
High-voltage Transmission Lines
High voltage electricity refers to electrical potential large enough to cause injury or damage. In certain industries, ''high voltage'' refers to voltage above a certain threshold. Equipment and conductors that carry high voltage warrant special safety requirements and procedures. High voltage is used in electrical power distribution, in cathode ray tubes, to generate X-rays and particle beams, to produce electrical arcs, for ignition, in photomultiplier tubes, and in high-power amplifier vacuum tubes, as well as other industrial, military and scientific applications. Definition The numerical definition of depends on context. Two factors considered in classifying a voltage as high voltage are the possibility of causing a spark in air, and the danger of electric shock by contact or proximity. The International Electrotechnical Commission and its national counterparts (IET, IEEE, VDE, etc.) define ''high voltage'' as above 1000 V for alternating current, and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-voltage Direct Current
A high-voltage direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. Most HVDC links use voltages between 100 kV and 800 kV. However, a 1,100 kV link in China was completed in 2019 over a distance of with a power capacity of 12 GW. With this dimension, intercontinental connections become possible which could help to deal with the fluctuations of wind power and photovoltaics. HVDC allows power transmission between AC transmission systems that are not synchronized. Since the power flow through an HVDC link can be controlled independently of the phase angle between source and load, it can stabilize a network against disturbances due to rapid changes in power. HVDC also allows the transfer of power between grid systems running at different frequencies, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
War Of The Currents
The war of the currents was a series of events surrounding the introduction of competing electric power transmission systems in the late 1880s and early 1890s. It grew out of two lighting systems developed in the late 1870s and early 1880s; arc lamp street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting being marketed by Thomas Edison's company. In 1886, the Edison system was faced with new competition: an alternating current system initially introduced by George Westinghouse's company that used transformers to step down from a high voltage so AC could be used for indoor lighting. Using high voltage allowed an AC system to transmit power over longer distances from more efficient large central generating stations. As the use of AC spread rapidly with other companies deploying their own systems, the Edison Electric Light Company claimed in early 1888 that high voltages used in an alternating curr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Electrotechnical Exhibition
The 1891 International Electrotechnical Exhibition was held between 16 May and 19 October on the disused site of the three former ( Western Railway Stations) in Frankfurt am Main, Germany. The exhibition featured the first long-distance transmission of high-power, three-phase electric current, which was generated 175 km away at Lauffen am Neckar. As a result of this successful field trial, three-phase current became established for electrical transmission networks throughout the world. History The "Elektrotechnische Gesellschaft" (Electrotechnical Society) was founded in Frankfurt in 1881 with the aim of promoting electricity and, in particular, furthering research into its application for industry and technology. Three years later, some ten manufacturers of electrical equipment had set themselves up in the city. In around 1890, some of the enterprises were established which would later become major firms in Frankfurt: Hartmann & Braun, Staudt & Voigt (from 1891 Voigt & H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lauffen-Frankfurt Three Phase AC Transmission
The 1891 International Electrotechnical Exhibition was held between 16 May and 19 October on the disused site of the three former ( Western Railway Stations) in Frankfurt am Main, Germany. The exhibition featured the first long-distance transmission of high-power, three-phase electric current, which was generated 175 km away at Lauffen am Neckar. As a result of this successful field trial, three-phase current became established for electrical transmission networks throughout the world. History The "Elektrotechnische Gesellschaft" (Electrotechnical Society) was founded in Frankfurt in 1881 with the aim of promoting electricity and, in particular, furthering research into its application for industry and technology. Three years later, some ten manufacturers of electrical equipment had set themselves up in the city. In around 1890, some of the enterprises were established which would later become major firms in Frankfurt: Hartmann & Braun, Staudt & Voigt (from 1891 Voigt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marcel Deprez
Marcel Deprez (12 December 1843 – 13 October 1918) was a French electrical engineer. He was born in Aillant-sur-Milleron. He died in Vincennes. Biography Deprez was born in Aillant-sur-Milleron in rural France and attended the School of Mines in Paris. He was not able to complete the course; however, he must have made a good impression, as he was employed as a secretary to the Director of the school, Charles Combes.The Engine Indicator , John Walters, Chapter 8, p.8-20 At , from 1876 to 1886, Deprez conducted the first experiments to transmit over long distances. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Waterfall
An artificial waterfall is a water feature or fountain which imitates a natural waterfall. Artificial waterfalls have long been featured in traditional Japanese gardens, where they can serve to highlight a scene or to provide focus. The classic gardening manual ''Sakuteiki'', written in the mid-to-late 11th century, lists nine different types. Cascata delle Marmore, The Cascata delle Marmore is an example of a man-made waterfall created by the ancient Ancient Rome, Romans. Artificial waterfalls were popular in Europe in the late 19th and early 20th centuries, including the famous waterfall in Viktoriapark in Berlin.Susan C. Anderson (Editor), Bruce Tabb (Editor), ''Water, Leisure and Culture: European Historical Perspectives'', Berg Publishers, 2002, , page 122 An early American example is Huntington Waterfalls in Golden Gate Park, San Francisco, California. In 1896, ''Gardening Magazine'' reported that it was the only artificial waterfall in a public park in North America. The ... [...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] |
Watt
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Watt (1736–1819), an 18th-century Scottish inventor, mechanical engineer, and chemist who improved the Newcomen engine with his own steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution. Overview When an object's velocity is held constant at one metre per second against a constant opposing force of one newton, the rate at which work is done is one watt. : \mathrm In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V), meaning the watt is equivalent to the volt-ampere (the latter unit, however, is used for a different quantity from the real power of an electrical circuit). : ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
