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1 Spannungsunsymmetrie
небаланс напряжений
Отличие по модулю значения хотя бы одного из фазных или линейных напряжений многофазной системы электроснабжения от значений напряжений других фаз.
[ ГОСТ 23875-88]EN
voltage unbalance
phenomenon due to the differences between voltage deviations on the various phases, at a point of a polyphase system, resulting from differences between the phase currents or geometrical asymmetry in the line
[IEV number 604-01-29]
voltage unbalance (imbalance)
in a polyphase system, a condition in which the magnitudes of the phase voltages or the phase angles between consecutive phases are not all equal (fundamental component)
NOTE In three phase systems, the degree of inequality is usually expressed as the ratio of the negative and zero sequence components to the positive sequence component. In this technical report, voltage unbalance is considered in relation to three-phase systems and negative sequence only
[IEC 61000-3-13, ed. 1.0 (2008-02)]
voltage unbalance
condition in a polyphase system in which the r.m.s. values of the line voltages (fundamental component), and/or the phase angles between consecutive line voltages, are not all equal
NOTE 1 The degree of the inequality is usually expressed as the ratios of the negative- and zero-sequence components to the positive-sequence component.
NOTE 2 In this standard, voltage unbalance is considered in relation to 3-phase systems.
[IEC 61000-4-30, ed. 2.0 (2008-10)]FR
déséquilibre des tensions d'un réseau
phénomène résultant des différences de charge ou des dissymétries géométriques de lignes et qui provoque des différences entre les écarts de tension sur les diverses phases en un point d'un réseau polyphasé
[IEV number 604-01-29]
déséquilibre de tension
dans un réseau d’énergie électrique polyphasé, état dans lequel les valeurs efficaces des tensions entre conducteurs (composante fondamentale), et/ou les différences de phase entre conducteurs successifs, ne sont pas toutes égales
NOTE 1 Le taux de déséquilibre s’exprime habituellement par le rapport de la composante inverse ou homopolaire à la composante directe.
NOTE 2 Dans la présente norme, le déséquilibre de tension est relatif aux réseaux triphasés
[IEC 61000-4-30, ed. 2.0 (2008-10)]Параллельные тексты EN-RU
Voltage unbalance
Voltage unbalance on the most unbalanced phase, displayed as a percentage of Vavg.
[Schneider Electric]Небаланс напряжений
Самое значительное отличие по модулю значения одного из линейных напряжений, выраженное в процентах от среднего напряжения Vavg.
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Немецко-русский словарь нормативно-технической терминологии > Spannungsunsymmetrie
2 Umweltbelastung durch Fischerei
воздействие рыболовства на окружающую среду
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
environmental impact of fishing
Fishing may have various negative effects on the environment: effluent and waste from fish farms may damage wild fish, seals, and shellfish. Fish farmers use tiny quantities of highly toxic chemicals to kill lice: one overdose could be devastating. So-called by-catches, or the incidental taking of non-commercial species in drift nets, trawling operations and long line fishing is responsible for the death of large marine animals and one factor in the threatened extinction of some species. Some fishing techniques, like the drift nets, yield not only tons of fish but kill millions of birds, whales and seals and catch millions of fish not intended. Small net holes often capture juvenile fish who never have a chance to reproduce. Some forms of equipment destroy natural habitats, for example bottom trawling may destroy natural reefs. Other destructive techniques are illegal dynamite and cyanide fishing. (Source: WPR)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
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Немецко-русский словарь нормативно-технической терминологии > Umweltbelastung durch Fischerei
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