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1 зараженная зона
зараженная зона
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
contaminated area
Any site or region that is damaged, harmed or made unfit for use by the introduction of unwanted substances, particularly microorganisms, chemicals, toxic and radioactive materials and wastes. (Source: TOE / HMD)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > зараженная зона
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2 few
❢ When few is used as a quantifier to indicate the smallness or insufficiency of a given number or quantity ( few houses, few shops, few people) it is translated by peu de: peu de maisons, peu de magasins, peu de gens. Equally the few is translated by le peu de: the few people who knew her le peu de gens qui la connaissaient. For examples and particular usages see A 1 in the entry.When few is used as a quantifier in certain expressions to mean several, translations vary according to the expression: see A 2 in the entry. When a few is used as a quantifier ( a few books), it can often be translated by quelques: quelques livres ; however, for expressions such as quite a few books, a good few books, see B in the entry. For translations of few used as a pronoun ( few of us succeeded, I only need a few) see B, C in the entry. For translations of the few used as a noun ( the few who voted for him) see D in the entry.A quantif1 ( not many) peu de ; few visitors/letters peu de visiteurs/lettres ; few people came to the meeting peu de gens sont venus à la réunion ; very few houses/families très peu de maisons/familles ; there are very few opportunities for graduates il y a très peu de débouchés pour les diplômés ; one of my few pleasures un de mes rares plaisirs ; on the few occasions that she has visited this country les rares fois où elle a visité ce pays ; their needs are few ils ont peu de besoins ; their demands are few ils sont peu exigeants, ils revendiquent peu de chose ; to be few in number être peu nombreux ; there are too few women in this profession il y a trop peu de femmes dans ce métier ; with few exceptions à quelques exceptions près ; a man of few words gen un homme peu loquace ; ( approvingly) un homme qui ne se perd pas en paroles inutiles ;2 (some, several) every few days tous les deux ou trois jours ; over the next few days/weeks ( in past) dans les jours/semaines qui ont suivi ; ( in future) dans les jours/semaines à venir ; these past few days ces derniers jours ; the first few weeks les premières semaines ; the few books she possessed les quelques livres qu'elle possédait.B a few quantif quelques ; a few people/houses quelques personnes/maisons ; I would like a few more j'en voudrais quelques-uns (or quelques-unes) de plus ; quite a few people/houses pas mal ○ de gens/maisons, un bon nombre de gens/maisons ; we've lived here for a good few years nous vivons ici depuis un bon nombre d'années ; a few weeks earlier quelques semaines plus tôt ; in a few minutes dans quelques minutes ; in a few more months dans quelques mois ; a few more times quelques fois de plus.C pron1 ( not many) peu ; few of us succeeded peu d'entre nous ont réussi ; few of them could swim ils n'étaient pas nombreux à savoir nager ; few of them survived peu d'entre eux ont survécu, il y a eu peu de survivants ; there are so few of them that ( objects) il y en a tellement peu que ; ( people) ils sont tellement peu nombreux que ; there are four too few il en manque quatre ; as few as four people turned up quatre personnes seulement sont venues ; few can deny that il y a peu de gens qui nieraient que ;2 ( some) a few of the soldiers/countries quelques-uns or certains des soldats/pays ; I only need a few il ne m'en faut que quelques-uns/quelques-unes ; a few of us un certain nombre d'entre nous ; there were only a few of them ( objects) il n'y en avait que quelques-uns/quelques-unes ; ( people) ils étaient peu nombreux ; quite a few of the tourists come from Germany un bon nombre des touristes viennent d'Allemagne ; a good few of the houses were damaged un bon nombre des maisons ont été endommagées ; there are only a very few left ( objects) il n'en reste que très peu ; ( people) il ne reste que quelques personnes ; a few wanted to go on strike quelques-uns voulaient faire la grève.D n the few who voted for him les rares personnes qui ont voté pour lui ; great wealth in the hands of the few une grande richesse entre les mains d'une minorité ; music that appeals only to the few une musique qui ne s'adresse qu'à l'élite.to be few and far between être rarissimes ; such people/opportunities are few and far between de telles personnes/occasions sont rarissimes ; villages in this area are few and far between il y a très peu de villages dans cette région ; to have had a few (too many) ○ avoir bu quelques verres de trop, être bien parti ○. -
3 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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