-
1 pack
pack [pæk]remplir ⇒ 1 (a) bourrer ⇒ 1 (a), 1 (c) emballer ⇒ 1 (b) tasser ⇒ 1 (d) charger ⇒ 1 (e) faire sa valise ⇒ 2 (a) rentrer ⇒ 2 (b) s'entasser ⇒ 2 (c) sac a dos ⇒ 3 (a) paquet ⇒ 3 (b) bande ⇒ 3 (d) meute ⇒ 3 (d)∎ to pack one's case/one's bags faire sa valise/ses bagages;∎ figurative to pack one's bags (leave) plier bagages;∎ we're not packed nous n'avons pas fait nos bagages;∎ Theatre she packs the house every night elle fait salle comble chaque soir(b) (put into box, carton etc) emballer, empaqueter; (put into suitcase, bag, trunk etc) mettre dans sa valise/son sac/sa malle/ etc;∎ I've already packed the towels j'ai déjà mis les serviettes dans la valise;∎ shall I pack the camera? est-ce que j'emporte ou je prends l'appareil photo?;∎ I've packed a lunch for you je t'ai préparé de quoi déjeuner;∎ the equipment is packed in polystyrene le matériel est emballé dans du polystyrène;∎ esp American shall I pack these for you? (in supermarket) je vous emballe vos achats?∎ he packed his pockets with sweets, he packed sweets into his pockets il a bourré ses poches de bonbons;∎ commuters pack the morning trains les banlieusards s'entassent dans les trains du matin;∎ figurative we managed to pack a lot into a week's holiday on a réussi à faire énormément de choses en une semaine de vacances(d) (compress → soil) tasser;∎ the wind had packed the snow against the wall le vent avait tassé la neige contre le mur(e) (load → horse, donkey) charger∎ to pack a jury se composer un jury favorable;∎ to pack a meeting s'assurer un nombre prépondérant de partisans à une réunion;∎ Cards to pack the cards apprêter les cartes∎ he packs a lot of influence in cabinet/ministerial circles il a beaucoup d'influence au conseil des ministres/dans les milieux ministériels;(a) (for journey) faire sa valise ou ses bagages;∎ have you finished packing? as-tu fini tes bagages?(b) (fit → into container) rentrer;∎ the keyboard will pack easily into a briefcase on peut facilement faire tenir le clavier dans un attaché-case;∎ this dress packs well cette robe ne se froisse pas (même dans une valise)(c) (crowd together → spectators, passengers) s'entasser;∎ we all packed into her car nous nous sommes tous entassés dans sa voiture(d) (in rugby) former une mêlée3 noun∎ parachute pack sac m à parachute∎ British a pack of washing powder un paquet de lessive;∎ American a pack of cigarettes un paquet de cigarettes;∎ a four-/six-pack of beer un pack de quatre/six(d) (group → of people) bande f; (→ of cub scouts) meute f; (→ of hunting hounds) meute f; (→ of wolves) meute f, bande f; (→ of runners, cyclists) peloton m;∎ wolves hunt in packs les loups chassent en meute;∎ figurative press photographers often hunt in packs les photographes de presse se déplacent souvent en bande;∎ a pack of fools une bande ou un tas d'imbéciles;∎ British that's a pack of lies! c'est un tissu de mensonges!(e) (in rugby) pack m∎ wet/cold pack enveloppement m humide/froid(g) (pack ice) pack m, banquise f(h) (in snooker) = triangle formé par les boules rouges►► pack animal bête f de somme;Military pack drill exercice m avec paquetage (à titre de punition);∎ no names, no pack drill je ne citerai pas de noms;pack ice pack m, banquise f;pack leader (in rugby) responsable m des avants;Television & Cinema pack shot pack shot m;pack train convoi m de bêtes de somme∎ he really packs it away! qu'est-ce qu'il bouffe!;∎ she can really pack away the food when she gets going ce qu'elle peut engouffrer quand elle s'y met∎ I packed the kids away to bed/school j'ai envoyé les gosses au lit/à l'école(of bed, folding table, chair) se replier;∎ this tent packs away easily cette tente se replie ou se range facilement(soil, snow) tasser(in rugby) former une mêlée➲ pack in∎ I couldn't pack anything more in je ne pouvais pas en faire rentrer plus;∎ the play is packing them in la pièce fait salle comble;∎ we were packed in like sardines nous étions serrés comme des harengs (en caque) ou comme des sardines∎ you should pack in smoking tu devrais arrêter de fumer□ ;∎ pack it in! arrête!□, ça suffit!□(a) (crowd in) s'entasser (à l'intérieur)∎ the photocopier's just packed in on me la photocopieuse vient de me lâcherfamiliar expédier□ ;∎ I packed the kids off to bed/school j'ai envoyé les gosses au lit/à l'école∎ to pack on all sail mettre toutes voiles dehorsfamiliar (fill completely → room) remplir à craquer;∎ the hall was packed out la salle était pleine à craquer ou comble ou bondée;∎ the theatre had been packed out for weeks le théâtre faisait salle comble depuis des semaines;∎ the show was completely packed out il n'y avait plus un seul billet pour ce spectacle□➲ pack up(a) (pack one's suitcase) faire sa valise ou ses bagages∎ my car's packed up ma voiture m'a lâché;∎ her heart has packed up son cœur a lâché ou cédé∎ I'm packing up for today j'arrête pour aujourd'hui□(a) (suitcase, bags) faire(b) (tidy up → clothes, belongings, tools) ranger;∎ help me pack up the tent aide-moi à plier la tente -
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
См. также в других словарях:
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