- Anchor pylon
Anchor pylons or strainer pylons utilize horizontal
insulatorsand occur at the endpoints of conductors. Such endpoints are necessary when interfacing with other modes of power transmission (see image) and, due to the inflexibility of the conductors, when significantly altering the direction of the pylonchain. Anchor pylons are also employed at branch points as branch pylons and must occur at a maximum interval of 5 km, due to technical limitations on conductor length. Conductors are connected at such pylons by a short conductor cable "strained" between both ends. They often require anchorcables to compensate for the asymmetric attachment of the conductors. Therefore, anchor pylons tend to be more stably built than a support pylon and are often used, particularly in older construction, when the power line must cross a large gap, such as a railwayline, river, or valley.
A special kind of an anchor pylon is a termination pylon. It is used for the transition of an overhead powerline to an underground cable. A termination pylon, at which the powerline runs further as well as overhead line and as underground cable is a branch pylon for a cable branch.For voltages below 30 kV also
pylon transformers are used.
Transposition pylons are anchor or tension or terminal pylons at which the conductors are "transposed" so that they exchange sides of the pylon.
Anchor pylons may also have a
circuit breakerattached to their crossbeam. These so called switch pylons are operated from the ground by the use of long sticks. The attachment of circuit breakers to pylons is only practical when voltages are less than 50 kV.
Wikimedia Foundation. 2010.
Look at other dictionaries:
anchor pylon — noun Endpoints that utilize horizontal insulators and occur at the endpoints of high power transmission lines. Such endpoints are necessary when interfacing with other modes of power transmission and, due to the inflexibility of the conductors,… … Wiktionary
Long-distance anchor pylon — A long distance anchor pylon is an anchor pylon at the end of a line section with a span width longer than the others used in the line. At long distance anchor pylons there are larger distances between the conductor cables as at other sections in … Wikipedia
Electricity pylon — An electricity pylon or transmission tower is a tall, usually steel lattice structure used to support overhead electricity conductors for electric power transmission.High voltage AC transmission towersThree phase electric power systems are used… … Wikipedia
Portal pylon — In electricity distribution, a portal pylon is a type of pylon with which the cross beams on the conductor cables rest on at least two towers. Portal pylons can be made of wood, concrete, steel tubing or steel lattice. They are used in German… … Wikipedia
Branch pylon — In the layout of an overhead electrical transmission system, a branch pylon is a pylon that is used to start a line branch. The branch pylon is responsible for holding up both the main line and the start of the branch line, and must be structured … Wikipedia
Wood pylon — A wood pylon is an electricity pylon made of wood. For support pylons a straight trunk impregnated with tar is usually used, which carries one or more cross beams with the conductor cables on the top. For anchor pylons constructions looking like… … Wikipedia
Dead-end tower — single circuit dead end tower with steel pole construction A dead end tower (also anchor tower, anchor pylon) uses horizontal strain insulators and occur at the endpoints of conductors. Such endpoints are necessary when interfacing with other… … Wikipedia
Overhead line crossing — An overhead line crossing is the crossing of an obstacle such as a traffic route, a river, a valley or a strait by an overhead power line. The style of crossing depends on the local conditions and regulations at the time the power line is… … Wikipedia
Elbe Crossing 2 — is a group of pylons providing overhead lines for four 380 kV three phase AC current circuits across the German river Elbe. It was constructed between 1976 and 1978 to supplement Elbe Crossing 1, and consists of 4 masts:* A 76 meter tall anchor… … Wikipedia
Shukhov tower on the Oka River — (Dzerzhinsk High Voltage Mast) is the world’s only surviving hyperboloid electricity pylon. It is located in Russia, in the western suburbs of Nizhniy Novgorod, on the left bank of the Oka River near Dzerzhinsk. History The Shukhov Tower was a… … Wikipedia