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400kV Thames Crossing
The 400 kV Thames Crossing is an overhead power line crossing of the River Thames, between Botany Marshes in Swanscombe, Kent, and West Thurrock, Essex, England. Its towers are the tallest electricity pylons in the UK. The present crossing was built in 1965, and comprises two 190-metre (623 feet) tall lattice towers each side of the Thames. Some suggest that the choice of this height was deliberate, being just taller than the BT Tower in London. The span is , the minimum height of the conductors over the river is 76 metres (249 feet). Each tower has three crossarms and carries two circuits of 400 kV three-phase AC. 400 kV power lines also cross the Thames at the Thames Cable Tunnel, the Dartford Cable Tunnel, and the London Power Tunnels. 132 kV Thames Crossing There was at one time an earlier 132 kV crossing nearby, with towers 148.4 metres tall. Linking Dagenham and Crossness, it was built between 1927 and 1932 and was part of the Belvedere-Crowlands 132/33/25 kV doub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Grid Plc
National Grid plc is a British multinational electricity and gas utility company headquartered in London, England. Its principal activities are in the United Kingdom, where it owns and operates electricity and natural gas transmission networks, and in the Northeastern United States, where as well as operating transmission networks, the company produces and supplies electricity and gas, providing both to customers in New York and Massachusetts. National Grid plc is one of the largest investor-owned utility companies in the world; it has a primary listing on the London Stock Exchange where it is a constituent of the FTSE 100 Index, and a secondary listing in the form of its American depositary receipts on the New York Stock Exchange. History Background (CEGB before 1990) Before 1990, both the generation and transmission activities in England and Wales were under the responsibility of the Central Electricity Generating Board (CEGB). The present electricity market in the Unite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dagenham
Dagenham () is a town in East London, England, within the London Borough of Barking and Dagenham. Dagenham is centred east of Charing Cross. It was historically a rural parish in the Becontree Hundred of Essex, stretching from Hainault Forest in the north to the River Thames in the south. Dagenham remained mostly undeveloped until 1921, when the London County Council began construction of the large Becontree housing estate. The population significantly increased as people moved to the new housing in the early 20th century, with the parish of Dagenham becoming Dagenham Urban District in 1926 and the Municipal Borough of Dagenham in 1938. In 1965 Dagenham became part of Greater London when most of the historic parish become part of the London Borough of Barking. Dagenham was chosen as a location for industrial activity and is perhaps most famous for being the location of the Ford Dagenham motor car plant where the Ford sewing machinists strike of 1968 took place. Following the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Power Infrastructure In England
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] |
Powerline River Crossings
Powerline may refer to: Technology * Overhead power line, used for electric power transmission * Power-line communication, a computer networking technology * Powerline, a status line plugin for vim and other application; see Private Use Areas Music and media * ''Powerline'' (magazine), an American music magazine and website * Power Line, a political blog * "Power Lines", a 2016 single by TIGRESS * "Power Lines", a 2012 song by Reks from '' Straight, No Chaser'' * Powerline, a fictional singer in the ''A Goofy Movie ''A Goofy Movie'' is a 1995 American animated musical comedy-adventure film produced by Disney MovieToons and Walt Disney Television Animation. Directed by Kevin Lima, the film is based on The Disney Afternoon television series '' Goof Tro ...'' musical Sport * Powerlines F.C., South African soccer club {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Towers In Kent
A tower is a tall structure, taller than it is wide, often by a significant factor. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures. Towers are specifically distinguished from buildings in that they are built not to be habitable but to serve other functions using the height of the tower. For example, the height of a clock tower improves the visibility of the clock, and the height of a tower in a fortified building such as a castle increases the visibility of the surroundings for defensive purposes. Towers may also be built for observation, leisure, or telecommunication purposes. A tower can stand alone or be supported by adjacent buildings, or it may be a feature on top of a larger structure or building. Etymology Old English ''torr'' is from Latin ''turris'' via Old French ''tor''. The Latin term together with Greek τύρσις was loaned from a pre-Indo-European Mediterranean language, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woolwich Arsenal Station
Woolwich Arsenal station is a National Rail and Docklands Light Railway (DLR) paired interchange station in the heart of Woolwich in the Royal Borough of Greenwich. It has two parts; its raised, south-western part of the station is on the semi-slow, commuter service, corollary of the North Kent Line and also in its Dartford Loop services section between London and Dartford, run by Southeastern. Regular services beyond Dartford are to the Medway Towns, which start/finish in the opposite direction at Luton via the City of London, West Hampstead and St Albans. Its other part is the terminus of its own branch of the DLR, run by Transport for London. The modernist, but older, part of the station is on a corner of General Gordon Square, a green town square. The newer part has entrances to Woolwich's subterranean end of the DLR, and faces the top of Powis Street, a long, semi-pedestrianised retail avenue. It is named after the area's Woolwich or Royal Arsenal, to distinguish the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Docklands Light Railway
The Docklands Light Railway (DLR) is an automated light metro system serving the redeveloped Docklands area of London, England and provides a direct connection between London's two major financial districts, Canary Wharf and the City of London. First opened on 31 August 1987, the DLR has been extended multiple times, giving a total route length of . Lines now reach north to Stratford, south to Lewisham, west to and in the City of London financial district, and east to Beckton, London City Airport and Woolwich Arsenal. Further extensions are being considered. Normal operations are automated, so there is minimal staffing on the 149 trains (which have no driving cabs) and at major interchange stations; the four below-ground stations are staffed, to comply with underground station health and safety regulations. The DLR is owned by Docklands Light Railway Ltd, part of the London Rail division of Transport for London (TfL). It is operated under a franchise awarded by TfL to Ke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crossings Of The River Thames
The River Thames is the second-longest river in the United Kingdom, passes through the capital city, and has many crossings. Counting every channel – such as by its islands linked to only one bank – it is crossed by over 300 bridges. If taking cuts – excavated channels – to be measurements of river, its course west of Tilbury, traversing has 27 tunnels, six public ferries, one cable car link, and one ford. From end to end a channel of the Thames can be seen, mostly its main flow, which is passed over by 138 bridges. These are listed here with 2 former bridges and a seasonal festival bridge. Over 162 other bridges link to such places as typical or man-made islands or across an array of corollary and lesser side channels (backwaters), particularly in and around Oxford and the non-village channel of Ashton Keynes — these are not listed. The river's lower estuary is shallow – but wide – and has no crossing east of Tilbury, the ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powerline River Crossings In The United Kingdom
Powerline river crossings comprise both overhead lines and cable tunnels beneath rivers and estuaries. Overhead power lines are supported on towers (called pylons in the UK) which are usually significantly taller than overland pylons and are more widely spaced to cross the river in a single span. Tall pylons ensure that the electricity cables which they support provide an adequate safety clearance for river traffic. Overhead crossings The tallest and longest overhead power line river crossings in the United Kingdom are: The tallest electricity pylons in the UK are those of the 400 kV Thames Crossing, at West Thurrock, which are 190 m (630 ft) high. These were constructed by BICC in 1965. The cables stretch 1300 m (4,500 ft) across the River Thames and have a minimum clearance of 76 m (250 ft). There are two 400 kV circuits that connect Littlebrook substation on the south bank to West Thurrock substation on the north side. The longest powerline riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Spans
The following is a list of spans, either used for overhead line crossings of rivers, sea straits or valleys, as antenna or for aerial tramways. Powerline spans in flat areas with high pylons At these spans the sag of the conductors is less than the height of the pylons Powerline spans in mountainous areas requiring shorter pylons At these spans, the pylons are situated on the tops of mountains, so the topography determines the height of the lines. Because of this it is possible that the span pylons can be lower than the height of the line at point of largest sag. Antenna spans across valleys Aerial tramways Rope Tyroleans Other See also * Architectural structure Architectural engineers apply and theoretical knowledge to the engineering design of buildings and building systems. The goal is to engineer high performance buildings that are sustainable, economically viable and ensure the safety health. Archi ... * Timeline of three longest spans Referenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
275 KV Forth Crossing
The 275 kV Forth Crossing has the tallest electricity towers (pylons )in Scotland. They stand next to the Clackmannanshire Bridge and the Kincardine Bridge, and cross the River Forth. The tower at the southern end is 153.9 metres (505 ft), that at the northern end 137.16 metres (450 ft) tall. See also * 400 kV Thames Crossing * Aust Severn Powerline Crossing * Powerline river crossings in the United Kingdom Powerline river crossings comprise both overhead lines and cable tunnels beneath rivers and estuaries. Overhead power lines are supported on towers (called pylons in the UK) which are usually significantly taller than overland pylons and are more w ... References Towers in Scotland 400 kV Forth crossing Electric power transmission in the United Kingdom Powerline river crossings {{energy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aust Severn Powerline Crossing
Aust Severn Powerline Crossing is the longest overhead power line span in the United Kingdom with a length of . History The crossing spans the River Severn between Aust and Beachley and is part of the National Grid. It was commissioned in 1959, and comprises two 275 kV electricity circuits, which form part of the 275 kV Iron Acton to Whitson line. Construction It is situated south of the Severn Bridge and was built by J. L. Eve Construction, which became Eve Group, and is now Babcock Networks. It is mounted on two pylons, each tall. The pylon on the Aust side of the River Severn stands on a caisson accessible via a small bridge. See also * List of spans * Powerline river crossings in the United Kingdom * Crossings of the River Severn * Crossings of the River Wye *Severn-Wye Cable Tunnel The Severn-Wye Cable Tunnel, also known as the Severn Cable Tunnel, carries high-voltage (400 kV) electricity transmission lines beneath the estuaries of the River Severn and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
