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1 длительный допустимый ток
- courant permanent admissible, m
- courant admissible, m
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-французский словарь нормативно-технической терминологии > длительный допустимый ток
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2 многожильный кабель
многожильный кабель
многожильный провод
многожильный шнур
Кабель (провод, шнур), в котором число жил более трех.
[ ГОСТ 15845-80]EN
multicore cable
cable having more than one core
Note – The French term «câble multipolaire» is more specifically used to designate the cable constituting the phases of a multiphase system (example: three-core cable).
[EV ref 461-06-04]
multiconductor cable
cable having more than one conductor, some of which may be uninsulated
[IEV ref 461-06-03]FR
câble multiconducteur
câble multipolaire
câble comprenant plus d'un conducteur isolé
Note – Le terme câble multipolaire est plus particulièrement utilisé pour désigner le câble constituant les phases d'un système polyphasé (exemple: câble tripolaire).
[EV ref 461-06-04]
câble multiconducteur
câble multipolaire
câble comprenant plus d'une âme, dont éventuellement certaines non isolées
[IEV ref 461-06-03]Core - (токопроводящая) жила;
Insulator - изоляция жилы;
Protective Sheath - оболочка кабеля.Недопустимые, нерекомендуемые
Примечание(1) Мнение автора карточкиТематики
- кабели, провода...
EN
- bundled cable
- multi-pole cable
- multiconductor cable
- multicore cable
- multiple cable
- multiple-conductor cable
- multiple-core cable
- multistrand cable
- N-conductor cable
- polycore cable
DE
- mehradriges Kabel, n
- Mehrleiterkabel, n
FR
Русско-французский словарь нормативно-технической терминологии > многожильный кабель
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3 записывающий (измерительный) прибор
записывающий (измерительный) прибор
самописец
-
[IEV number 312-02-11]EN
recording (measuring) instrument
recorder
measuring instrument which records on a recording medium information corresponding to the values of the measurand
NOTE 1 – Some recording instruments can incorporate an indicating device.
NOTE 2 – Some recording instruments can record information corresponding to more than one measurand.
Source: ≈ VIM 4.7
[IEV number 312-02-11]FR
appareil (de mesure) enregistreur
appareil de mesure qui enregistre sur un support d'enregistrement des informations correspondant aux valeurs du mesurande
NOTE 1 – Certains appareils enregistreurs peuvent comporter un dispositif indicateur.
NOTE 2 – Certains appareils enregistreurs peuvent enregistrer les informations correspondant à plusieurs mesurandes.
Source: ≈ VIM 4.7
[IEV number 312-02-11]Тематики
- измерение электр. величин в целом
Синонимы
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > записывающий (измерительный) прибор
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4 формирование почвы
формирование почвы
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
soil formation
The combination of natural processes by which soils are formed. It is also known as pedogenesis. The most important soil-forming factors are parent material, terrain, climate, aspect, vegetation cover, microorganisms in the soil and the age of the land surface. Some pedologists would add to this list the influence of human activities. All the factors exhibit varying degrees of interrelationship and some are more important than others, with climate often being singled out as the most important. (Source: WHIT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > формирование почвы
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5 гармонизация права
гармонизация права
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
harmonisation of law
The process by which two or more states, sometimes under the auspices of an interstate or international organization, change their legislation relevant to some area of common concern to conform their statutes and to facilitate compliance and enforcement across borders. (Source: GT2)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > гармонизация права
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6 гибкий подход к вопросам охраны окружающей среды
гибкий подход к вопросам охраны окружающей среды
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
flexible approach to environmental protection
Plans, referred to in various rules as emissions averaging, or flexible compliance plans, allow facilities to undercontrol some emission points that are too costly to control to mandated levels as long as these units are balanced by overcontrolling other emission units that are more cost-effective to control. (Source: ENVAR)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > гибкий подход к вопросам охраны окружающей среды
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7 графство
графство
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
county
An area comprising more than one city and whose boundaries have been designed according to some biological, political, administrative, economic, demographic criteria. (Source: LANDYa)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > графство
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8 дельта реки
дельта реки
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
delta
A delta is a vast, fan-shaped creation of land, or low-lying plain, formed from successive layers of sediment washed from uplands to the mouth of some rivers, such as the Nile, the Mississippi and the Ganges. The nutrient-rich sediment is deposited by rivers at the point where, or before which, the river flows into the sea. Deltas are formed when rivers supply and deposit sediments more quickly that they can be removed by waves of ocean currents. The importance of deltas was first discovered by prehistoric man, who was attracted to them because of their abundant animal and plant life. Connecting waterways through the deltas later provided natural routes for navigation and trade, and opened up access to the interior. Deltas are highly fertile and often highly populated areas. They would be under serious threat of flooding from any sea-level rise. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > дельта реки
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9 заселение видов растений
заселение видов растений
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
introduction of plant species
Plants which have been translocated by human agency into lands or waters where they have not lived previously, at least during historic times. Such translocation of species always involves an element of risk if not of serious danger. Newly arrived species may be highly competitive with or otherwise adversely affect native species and communities. Some may become a nuisance through sheer overabundance. They may become liable to rapid genetic changes in their new environment. Many harmful introductions have been made by persons unqualified to anticipate the often complex ecological interaction which may ensue. On the other hand many plants introduced into modified or degraded environments may be more useful than native species in controlling erosion or in performing other positive functions. (Source: WPR)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > заселение видов растений
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10 комбинированное устройство с плавким предохранителем
комбинированное устройство с плавкими предохранителями
Сочетание выключателя, разъединителя или выключателя-разъединителя и одного или нескольких предохранителей, образующих единое устройство, собранное изготовителем или в соответствии с его инструкцией
Примечание.
Это общий термин для коммутационных аппаратов с плавкими предохранителями.
(МЭС 441-14-04)
[ ГОСТ Р 50030. 3-99 ( МЭК 60947-3-99)]
комбинация с плавким предохранителем
Комбинация контактного коммутационного аппарата и одного или нескольких плавких предохранителей в составном устройстве, собранном изготовителем или по его инструкциям.
МЭК 60050(441-14-04).
[ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]EN
fuse-combination unit
a combination of a mechanical switching device and one or more fuses in a composite unit, assembled by the manufacturer or in accordance with his instructions
NOTE – Some fuse-combination units may be provided with a striker release such that the operation of any striker causes all poles of the associated mechanical switching device to open.
[IEV number 441-14-04]FR
combiné-fusibles
combinaison en un seul appareil, assemblé par le constructeur ou selon ses instructions, d'un appareil mécanique de connexion et d'un ou plusieurs fusibles
NOTE – Certains combinés-fusibles peuvent être munis d'un déclencheur par percuteur de telle manière que le fonctionnement de l'un quelconque des percuteurs provoque l'ouverture de tous les pôles de l'appareil mécanique de connexion associé.
[IEV number 441-14-04]Тематики
- аппарат, изделие, устройство...
- предохранитель
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > комбинированное устройство с плавким предохранителем
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11 общество
общество
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
society
Human group of people, more or less large and complex, associated for some common interest and characterized by distinctive hierarchical relationships. (Source: ZINZAN)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > общество
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12 песчаная дюна
песчаная дюна
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
sand dune
An accumulation of loose sand heaped up by the wind, commonly found along low-lying seashores above high-tide level, more rarely on the border of large lakes or river valleys, as well as in various desert regions, where there is abundant dry surface sand during some part of the year. (Source: BJGEO)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > песчаная дюна
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13 природный заповедник
природный заповедник
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
nature reserve
Areas allocated to preserve and protect certain animals and plants, or both. They differ from national park, which are largely a place for public recreation, because they are provided exclusively to protect species for their own sake. Endangered species are increasingly being kept in nature reserves to prevent them from extinction, particularly in India, Indonesia and some African countries. Natural reserves were used once to preserve the animals that landowners hunted, but, in the 19th century, they became places where animals were kept to prevent them from dying out. Special refuges and sanctuaries are also often designated to protect certain species or groups of wild animals or plants, especially if their numbers and distribution have been significantly reduced. They also serve as a place for more plentiful species to rest, breed or winter. Many parts of the world also have marine and aquatic reserves to protect different species of sea or freshwater plant and animal life. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > природный заповедник
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14 сельскохозяйственные машины
сельскохозяйственные машины
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
agricultural machinery
Machines utilized for tillage, planting, cultivation and harvesting of crops. Despite its benefits in increasing yields, mechanisation has clearly had some adverse environmental effects: deep ploughing exposes more soil to wind and water erosion; crop residues can be removed as opposed to ploughing back into the soil; removal of residues can lead to a serious loss of organic content in the soil, which may increase the risk of soil erosion. (Source: MGH / DOBRIS)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > сельскохозяйственные машины
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15 ущерб, нанесенный почве
ущерб, нанесенный почве
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
soil damage
Soil impaired as a consequence of human activity. A study financed by UNEP, reporting in 1992, found that about 10,5% of the world's vegetative surface had been seriously damaged by human activity since 1945. The study found that much of the damage had been masked by a general rise in global agricultural productivity resulting from expanded irrigation, better plant varieties, and greater use of production inputs, such as fertilizers and pesticides. More than 1/3 of the damaged land was in Asia, almost 1/3 in Africa, and 1/4 in Central America. Some land had been damaged beyond restoration. The greatest sources of soil degradation were overgrazing, unsuitable agricultural practices, and deforestation. (Source: GILP96)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > ущерб, нанесенный почве
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16 экотоксичность
экотоксичность
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
ecotoxicity
Quality of some substances or preparations which present or may present immediate or delayed risks for one or more sectors of the environment. (Source: GRAHAW)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > экотоксичность
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