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1 material, harm
préjudice m important -
2 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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3 come
come [kʌm]━━━━━━━━━━━━━━━━━2. modifier━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━a. venir• coming! j'arrive !► to come + preposition• to come behind sb/sth suivre qn/qch• to come between two people ( = interfere) s'interposer entre deux personnes• to come for sb/sth venir chercher qn/qch• where do you come from? tu viens d'où ?• if it comes to that,... dans ce cas-là...• when it comes to... quand il s'agit de...► to come + -ing• to come running/shouting arriver en courant/en criant► to come + adverb/adjective• to come apart ( = fall to pieces) tomber en morceauxb. ( = have one's place) se trouverc. ( = happen) arriver• how do you come to be here? comment se fait-il que vous soyez ici ?• how come it's so expensive? (inf) comment se fait-il que cela soit si cher ?d. ( = result from) nothing came of it il n'en est rien sortie. ( = be available) this dress comes in three sizes cette robe existe en trois tailles• how do you like your tea? -- as it comes comment voulez-vous votre thé ? -- ça m'est égalf. ► to come to + infinitive ( = end up) finir parg. ( = reach orgasm) (inf!) jouir2. modifier(gen = lure) attrape-nigaud m( = happen) arriver• how did it come about? comment est-ce arrivé ?► come acrossa. ( = cross) traversera. venir• come along! (allez,) venez !• why don't you come along? pourquoi ne viendrais-tu pas ?b. ( = progress) faire des progrès ; [plans] avancera. ( = leave) s'en aller• come away from there! va-t'en de là !b. ( = become detached) se détacher[person, fashion] revenira. descendre• come down from there at once! descends de là tout de suite !b. ( = fall) [rain, curtain] tomberd. ( = be demolished) être démolie. ( = drop) [prices] baisserf. ( = be transmitted) [tradition] être transmis (de père en fils)► come down with inseparable transitive verb[+ disease] attraper• after the burglary, her neighbours came forward with offers of help après le cambriolage, ses voisins ont offert de l'aidera. [person] entrer ; [tide] monter• come in! entrez !• reports are now coming in of a terrorist attack des informations nous parviennent selon lesquelles il y aurait eu un attentat terroristec. he has £20,000 coming in every year il touche 20 000 livres par an• we have no money coming in at the moment nous n'avons aucune rentrée d'argent en ce moment► come in for inseparable transitive verb[+ criticism] être l'objet dea. ( = inherit) hériter deb. ( = play a role) logic doesn't really come into it la logique n'a pas grand-chose à voir là-dedans► come offa. [button] se découdre ; [mark] partirb. ( = take place) avoir lieuc. ( = succeed) [plan] se réaliser ; [attempt, experiment] réussird. (in contest, conflict) to come off best avoir le dessusb. [+ drug] arrêtera. come on, try again! allez, encore un effort !b. ( = progress) faire des progrès• how are your plans coming on? où en sont vos projets ?d. [actor] entrer en scène( = start discussing) aborder• I'll come on to that in a moment j'aborderai cette question dans un moment► come out intransitive verba. sortir ; [sun, stars] apparaître ; [truth, news, qualities] apparaître au grand jour ; [stain] partir• to come out for/against sth prendre position pour/contre qchd. (British) ( = come out on strike) se mettre en grève• she came out as a lesbian elle a révélé son homosexualité► come out with (inf) inseparable transitive verb• you never know what she's going to come out with next on ne sait jamais ce qu'elle va sortir (inf)► come overa. venirc. ( = make impression) he came over as a decent person il a donné l'impression d'être une personne décente[feeling] envahirb. ( = drop in) passerc. ( = happen) se tenird. ( = change one's mind) changer d'avise. ( = regain consciousness) revenir à soi► come througha. ( = survive) s'en sortirc. what came through most was her enthusiasm ce que l'on remarquait surtout, c'était son enthousiasme( = survive) [+ illness, danger, war] survivre à► come to( = regain consciousness) reprendre connaissance( = amount to) se monter à• how much does it come to? ça se monte à combien ?• it comes to $20 ça fait 20 dollars en touta. ( = be subjected to) [+ sb's influence] tomber sous ; [+ attack, pressure] être l'objet deb. ( = be classified under) être classé sousc. ( = be the responsibility of) this comes under another department c'est du ressort d'un autre service► come up intransitive verba. monter• do you come up to York often? est-ce que vous montez souvent à York ?c. [plant] sortird. [sun] se levere. ( = arise) être soulevéa. ( = reach up to) arriver àb. ( = equal) répondre à• his work has not come up to our expectations son travail n'a pas répondu à notre attente► come up with inseparable transitive verb* * *[kʌm] 1.2. 3.come, come! — allons, allons!
1) ( arrive) [person, day, success, fame] venir; [bus, letter, news, rains, winter, war] arriverto come by — ( take) prendre [bus, taxi, plane]
I came on foot/by bike — je suis venu à pied/à bicyclette
to come down — descendre [stairs, street]
to come up — monter [stairs, street]
to come from — venir de [airport, hospital]
to come into — entrer dans [house, room]
to come past — [car, person] passer
to come through — [person] passer par [town centre, tunnel]; [water, object] traverser [window etc]
to come to — venir à [school, telephone]
come Christmas/summer — à Noël/en été
2) ( approach) s'approcherto come and see/help somebody — venir voir/aider quelqu'un
to come to somebody for — venir demander [quelque chose] à quelqu'un [money, advice]
I could see it coming — ( of accident) je le voyais venir
to come close ou near to doing — faillir faire
3) (call, visit) [dustman, postman] passer; [cleaner] venir4) ( attend) venirto come to — venir à [meeting, party]
5) ( reach)to come to —
to come up/down to — [water] venir jusqu'à; [dress, curtain] arriver à
6) ( happen)7) ( begin)to come to believe/hate — finir par croire/détester
8) ( originate)to come from — [person] être originaire de, venir de [city, country]; [word, legend] venir de [country, language]; [substance] provenir de [raw material]; [coins, stamps] provenir de [place]; [smell, sound] venir de [place]
to come from France — [fruit, painting] provenir de France; [person] être français/-e
9) ( be available)to come in — exister en [sizes, colours]
10) ( tackle)to come to — aborder [problem, subject]
11) ( develop)12) ( be situated) venirto come after — suivre, venir après
to come before — (in time, list, queue) précéder; ( in importance) passer avant
to come first/last — arriver premier/dernier
13) ( be due)he had it coming (to him) — (colloq) ça lui pendait au nez
they got what was coming to them — (colloq) ils ont fini par avoir ce qu'ils méritaient
14) ( be a question of)when it comes to something/to doing — lorsqu'il s'agit de quelque chose/de faire
•Phrasal Verbs:- come at- come by- come in- come off- come on- come out- come to- come up••come again? — (colloq) pardon?
come to that ou if it comes to that, you may be right — en fait, tu as peut-être raison
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4 вещество, загрязняющее воздух
вещество, загрязняющее воздух
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
air pollutant
Any pollutant agent or combination of such agents, including any physical, chemical, biological, radioactive substance or matter which is emitted into or otherwise enters the ambient air and can, in high enough concentrations, harm humans, animals, vegetation or material. (Source: LEE / TOE)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > вещество, загрязняющее воздух
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5 защита природы
защита природы
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
nature protection
Precautionary actions, procedures or installations undertaken to prevent or reduce harm to the elements of the material world that exist independently of human activity. (Source: RHW)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > защита природы
См. также в других словарях:
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the evil eye — a gaze or stare superstitiously believed to cause material harm he gave me the evil eye as I walked down the corridor * * * the evil eye : a look that is thought to be able to harm someone He gave her the evil eye. • • • Main Entry: ↑ … Useful english dictionary
the evil eye — ► the evil eye a gaze superstitiously believed to cause material harm. Main Entry: ↑evil … English terms dictionary
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