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intervals. At closely branched grids and where several electric circuits share a route (in particular when the lines operate at different voltages) on the same pylons the outside unbalance of the line, which is caused by the other electric circuits, dominates. In these cases, one finds large deviations from the transposing schemes. For example, in some such transpositions, only two of the three conductors on the pylons change their place. Also, transpositions on pylons near power substations are used to get an optimal arrangement of the feeding system without crossing of conductors.
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Modern power lines are normally not transposed on the go as the difference in the inductance of the phases are negligibly small due to asymmetrical spacing, However, intermediate switching stations, where the transposition takes place, are implemented whenever it is necessary. It cannot be neglected.
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In communication cables, the transposition is used to reduce coupling between circuits in the same cable. The principal measure is the pitch or lay length, the distance over which the pairs of a circuit are twisted. By twisting, the wires become longer than the cable. The stranding factor indicates
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between the conductors is thus substantially higher than with
Dieselhorst Martin (DHM) stranding in which the situation of the conductors to each other in the cable changes repeatedly. Because of the smaller work capacitance of the DHM stranding, it is possible to form additional electric circuits
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As the mutual influence of electric circuits can change after new lines are installed or old lines dismantled, certain transpositions may disappear or be added after new construction in electricity mains. In the case of a twisted line the individual conductors of an electric circuit swap places,
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are transposed at transposing structures. To ensure balanced capacitance of a three-phase line, each of the three conductors must hang once at each position of the overhead line. For longer powerlines without branches, wires are transposed according to a fixed transposing scheme, at regular
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of the line, which can lead to one-sided loads in three-phase systems, is also reduced. Transposing of overhead lines is usually realized at so-called transposing pylons. Transposing is an effective measure for the reduction of inductively linked normal mode interferences.
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developed a landline system for newly occupied territories to carry multiple telephone and telegraph or teleprinter channels. Overhead lines were common in larger and less densely populated countries like
Australia, New Zealand, and the western United States.
182:, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Knowledge.
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453:. Since the phantom transducers are turned on to in the middle of the master transducers, the currents of the phantom circuit on the two coming Rome circles compensate themselves.
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The mutual influence of electrical conductors is reduced by transposition. Transposition also equalizes their impedance relative to the ground, thus avoiding one-sided loads in
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Conductors are transposed in overhead power lines to reduce transmission losses. Unlike in cables, continuous transposition is impractical, so it is done at a specialized
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For cables, the swapping is gradual and continuous; that is the two or three conductors are twisted around each other. For communication cables, this is called
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either in their whole course (at cables) or at certain points (at overhead lines). The mutual influence of electrical conductors is reduced by transposing. The
584:"Paekakariki railway station. Shows on left main overhead telephone line north of Wellington, New Zealand with trunk (top) and local (bottom) circuits c1942"
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Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article.
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twisting: Four single wires maintain the same relation to each other in the quad, whereby the members of a twisted pair face each other diagonally.
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Different strandings have different transmission characteristics. Capacitance of a stranding is one of the differences. For example, in
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Overhead trunk lines were rare in Europe and the German term for transposition “Drehkreuzachse” remained a mystery at the
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the relationship of single wire length to cable length; it amounts to with communication cables about 1.02 to 1.04.
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Content in this edit is translated from the existing German
Knowledge article at ]; see its history for attribution.
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systems. Transposing is an effective measure for the reduction of inductively linked normal mode interferences.
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lines used for long-distance (trunk or toll) telephone circuits, transposition was used for reducing
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codebreaking centre until late in World War II: General
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or open pair communication lines, the conductors are exchanged at pylons, for example at
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Three basic patterns, with variants, with the fractional length shown above each segment
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twisting the two conductors of a quadruple run parallel over the entire cable length.
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Magnetic field of a twisted and untwisted cable. The image of the cable is overlaid.
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Four-stranding: Two tightly twisted pairs may be loosely twisted together, or:
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and otherwise improve transmission. In telecommunications this applies to
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In practice, the following types of stranding are used most frequently:
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Three-stranding: Three single wires are stranded to a tripartite group.
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to the source of your translation. A model attribution edit summary is
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Swapping of positions of the conductors of a transmission line
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is the periodic swapping of positions of the conductors of a
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Pylon 206 of powerline
Hoheneck-Herbertingen near RĂĽbgarten
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to this template: there are already 1,886 articles in the
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lines three conductors are periodically transposed.
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a machine-translated version of the German article.
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415:Pair stranding: Two single wires are stranded to
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556:The Worldwide History of Telecommunications
532:. London: Atlantic Books. pp. 49–51.
530:Colossus: Bletchley Park's Greatest Secret
120:Learn how and when to remove this message
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69:"Transposition" transmission lines
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