-
1 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
Франко-русский словарь нормативно-технической терминологии > courant admissible, m
-
2 courant permanent 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
Франко-русский словарь нормативно-технической терминологии > courant permanent admissible, m
-
3 juste
juste [ʒyst]1. adjectivea. ( = équitable) [personne, notation] fair ; [sentence, guerre, cause] justb. ( = légitime) [revendication, vengeance, fierté] just ; [colère] justifiable• il en est fier, et à juste titre he's proud of it and rightly soc. ( = précis) right ; [appareil, montre] accurated. ( = pertinent) [idée, raisonnement] sound ; [remarque, expression] apt• très juste ! good point!e. [note, voix] true ; [instrument] in tunef. ( = insuffisant) [vêtement, chaussure] tight ; (en longueur, hauteur) on the short side• 1 kg pour six, c'est un peu juste 1 kg for six people is not really enough• trois heures pour faire cette traduction, c'est juste three hours to do that translation is not really enough2. adverba. ( = avec précision) [compter, viser] accurately ; [raisonner] soundly ; [deviner] correctly ; [chanter] in tune• juste à temps [arriver] just in timeb. ( = exactement) just• que veut-il au juste ? what exactly does he want?c. ( = seulement) justd. ( = pas assez) [compter, prévoir] not quite enough* * *ʒyst
1.
1) ( impartial) [personne] fair2) ( équitable) [règlement, partage] fair; [récompense, sanction, cause] justjuste retour des choses, il a été renvoyé — it was poetic justice that he got expelled
juste ciel! — (dated) good heavens!
3) ( légitime) [colère, certitude] righteous (épith); [revendication] legitimate; [crainte] justifiable; [raisonnement, remarque, comparaison] validà juste raison or titre — with good reason
4) ( adéquat) rightcomme de juste (colloq) il était en retard — of course, he was late
5) ( exact) [calcul, proportion, heure, analyse] correctle juste prix des choses — fig the true value of things
6) ( précis) [instrument de mesure] accurate7) Musique [piano, voix] in tune (jamais épith); [note] true8) ( trop ajusté) [vêtement, chaussure] tight9) ( à la limite)nous sommes un peu justes (colloq) en ce moment — money is a bit tight (colloq) at the moment
2.
1) ( sans erreur) [chanter] in tune; [sonner] true; [deviner] rightviser juste — lit to aim straight; fig to hit the nail on the head
2) ( précisément) just3) ( seulement) just4) ( depuis peu)5) ( à peine) hardlyj'ai réussi à éviter le bus mais ça a été juste — (colloq) I managed to avoid the bus but it was a close shave (colloq)
3.
au juste locution adverbiale exactly
4.
nom masculin righteous man* * *ʒyst1. adj1) (= équitable) (personne, partage) fairIl est sévère, mais juste. — He's strict but fair.
2) (= légitime) (réclamation) just, justifiedà juste titre — justifiably, rightfully
On peut se demander à juste titre s'ils n'ont pas été trop loin. — We may justifiably ask ourselves if they have gone too far.
Il a réclamé, à juste titre. — He complained, and rightfully so.
3) (= exact) (compte) right4) (= étroit) tightCette veste est un peu juste. — This jacket is a bit tight.
5) (= insuffisant)Ce sera un peu juste, tu aurais dû prendre plus de vin. — It's only just going to be enough, you should have got more wine.
2. adv1) (= seulement) just2) [aller, être] (vêtement, budget) tight3) [chanter] in tune4) [prévoir, calculer] right3. nm1) (= personne)2)comme de juste — of course, naturally
au juste — exactly, actually
* * *A adj1 ( impartial) [personne] fair;2 ( équitable) [règlement, partage] fair; [récompense, sanction, cause] just; ce n'est pas juste! it's not fair!; il est juste que/de faire it is fair that/to do; il est juste qu'il ait réussi it is fair that he succeeded; il ne serait pas juste de tout te donner it wouldn't be fair to give you everything; juste retour des choses, il a été dédommagé it was poetic justice that he got compensation; trouver un juste milieu to find a happy medium; juste ciel†! good heavens!;3 ( légitime) [colère, certitude] righteous ( épith); [revendication] legitimate; [raison] good; [crainte] justifiable; [raisonnement, remarque, comparaison] valid; j'ai de justes raisons de ne pas le croire I have good reason not to believe him; à juste raison or titre quite rightly, with good reason; ta remarque est très juste your remark is very valid; dire des choses justes to make some valid points;4 ( adéquat) right; trouver le mot juste to find the right word; c'est (très) juste! that's (quite) right!; comme de juste il était en retard as one might expect ou as per usual, he was late;5 ( exact) [calcul, proportion, heure, analyse] correct; j'ai tout juste I've got everything right; avoir l'heure juste to have the correct time; connaître le juste prix des choses fig to know the true value of things; apprécier qn/qch à sa juste valeur to appreciate sb fully/the true value of sth;6 ( précis) [instrument de mesure] accurate; ma montre n'est pas très juste my watch is not very accurate;7 Mus [piano, voix] in tune ( jamais épith); [note] true; ton piano n'est pas juste your piano is out of tune;9 ( à la limite) un poulet pour six c'est un peu juste one chicken for six people is stretching it a bit; une heure pour y aller c'est un peu juste one hour to get there is cutting it a bit fine; nous sommes un peu justes en ce moment○ money is a bit tight○ at the moment; j'ai réussi à éviter le bus mais ça a été juste○ I managed to avoid the bus but it was a close shave○.B adv1 ( sans erreur) [chanter] in tune; [sonner] true; [deviner] right; elle a vu juste dans ses prévisions she was right in her forecasts; viser juste lit to aim straight; fig to hit the nail on the head;2 ( précisément) just; juste quand j'arrivais just as I was arriving; c'est juste ce qu'il me faut that is just or exactly what I need; c'est juste avant/après la poste it's just before/after the post office; juste après les informations just ou straight after the news; j'ai juste assez (d'argent) I've got just enough (money); juste à temps just in time; ‘tu as eu ton train?’-‘oui mais tout juste’ ‘did you catch your train?’-‘yes, but only just’;3 ( seulement) just; j'en prends juste un I'm just taking one; ils ont juste eu le temps de manger they just had time to eat;4 ( depuis peu) (tout) juste only just; j'arrive juste I've only just arrived; il vient juste de partir he's only just left; il a tout juste vingt ans he's only just twenty;5 ( à peine) hardly; c'est tout juste s'il sait lire/tient debout he can hardly read/stand;6 ( parcimonieusement) j'ai prévu trop/un peu juste pour le repas I didn't prepare enough/quite enough food; calculer les prix au plus juste to calculate the prices down to the last penny.C au juste loc adv exactly; que s'est-il passé au juste? what happened exactly?; je ne sais pas au juste combien nous serons I don't know exactly how many of us there will be.[ʒyst] adverbe1. [avec justesse]tomber juste to guess right, to hit the nail on the headtu as vu ou deviné juste! you guessed correctly ou right!juste quand ou comme le téléphone sonnait just as ou when the phone was ringing3. [à peine, seulement] justil est juste 9 h, vous n'allez pas partir déjà it's only 9 o'clock, you're not going to leave alreadytout juste: j'ai tout juste le temps de prendre un café I've just about enough ou I've just got enough time to have a cup of coffeec'est tout juste s'il ne m'a pas frappé he very nearly ou all but hit mec'est tout juste s'il dit bonjour he hardly bothers to say hello, you're lucky if he says hello4. [en quantité insuffisante]un gâteau pour 8, ça fait (un peu) juste one cake for 8 people, that won't go very far————————[ʒyst] adjectif1. [équitable - partage, décision, personne] fairêtre juste envers ou avec quelqu'un to be fair to somebodyil ne serait que juste qu'il soit remboursé it would only be fair ou right for him to get his money back(avant le nom) [justifié - cause, récompense, punition] just ; [ - requête] legitimate ; [ - colère] just, legitimate2. (après le nom) [exact - calcul, compte, réponse] rightas-tu l'heure juste? have you got the right ou exact time?la nappe est un peu juste en longueur/largeur the tablecloth is a bit on the short/narrow sideune heure pour aller à l'aéroport, c'est trop juste an hour to get to the airport, that's not enoughses notes sont trop justes pour que vous le laissiez passer his marks are too borderline for you to pass him[de justesse]elle a réussi l'examen, mais c'était juste she passed her exam, but it was a close thing5. (après le nom) [compétent] goodavoir l'oreille/le coup d'œil juste to have a good ear/eyetrès juste! quite right!, good point!j'ai moins d'expérience que lui — c'est juste I'm less experienced than he is — that's true ou right6. (avant le nom) [approprié]apprécier quelque chose à son juste prix to appreciate the true value ou worth of somethingapprécier quelqu'un à sa juste valeur to appreciate the true worth ou value of somebody————————[ʒyst] nom masculin————————au juste locution adverbiale————————au plus juste locution adverbialecomme de juste locution adverbialecomme de juste, elle avait oublié she'd forgotten, of coursejuste ciel, juste Dieu interjection -
4 valeur de la terre
цена земли
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
land value
The monetary or material worth in commerce or trade of an area of ground considered as property. (Source: RHW)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Франко-русский словарь нормативно-технической терминологии > valeur de la terre
-
5 valeur agronomique
цена на сельхозпродукцию
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
agronomic value
The monetary or material worth at which buyers and sellers agree to do business for agricultural goods and services. (Source: AGP / RHW)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Франко-русский словарь нормативно-технической терминологии > valeur agronomique
-
6 gisement
дирекционный угол
Угол между проходящим через данную точку направлением и линией, параллельной оси абсцисс, отсчитываемый от северного направления оси абсцисс по ходу часовой стрелки.
Примечание
В зависимости от выбора системы поверхностных координат или проекции земного эллипсоида на плоскость дирекционный угол может иметь собственное название, например, геодезический дирекционный угол, гауссов дирекционный угол и т.д.
[ ГОСТ 22268-76]Тематики
Обобщающие термины
EN
DE
FR
месторождение полезных ископаемых
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
mineral deposit
A mass of naturally occurring mineral material, e.g. metal ores or nonmetallic mineral, usually of economic value, without regard to mode of origin. (Source: BJGEO)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
D. Richtungswinkel
E. Grid bearing
F. Gisement
Угол между проходящим через данную точку направлением и линией, параллельной оси абсцисс, отсчитываемый от северного направления оси абсцисс по ходу часовой стрелки.
Примечание. В зависимости от выбора системы поверхностных координат или проекции земного эллипсоида на плоскость дирекционный угол может иметь собственное название, например, геодезический дирекционный угол, гауссов дирекционный угол и т.д.
Источник: ГОСТ 22268-76: Геодезия. Термины и определения оригинал документа
Франко-русский словарь нормативно-технической терминологии > gisement
-
7 indice de tenue au cheminement
индекс устойчивости к трекингу
-
[IEV number 442-01-42]EN
proof tracking index
PTI (abbreviation)
the numerical value of the proof voltage expressed in volts which a material can withstand without tracking under specified test conditions
Source: 212-01-45
[IEV number 442-01-42]FR
indice de tenue au cheminement
ITC (abréviation)
valeur numérique de la tension d'épreuve exprimée en volts, qu'un matériau peut supporter sans cheminement dans des conditions d'essai spécifiées
Source: 212-01-45
[IEV number 442-01-42]EN
DE
FR
Франко-русский словарь нормативно-технической терминологии > indice de tenue au cheminement
-
8 ITC (abréviation)
индекс устойчивости к трекингу
-
[IEV number 442-01-42]EN
proof tracking index
PTI (abbreviation)
the numerical value of the proof voltage expressed in volts which a material can withstand without tracking under specified test conditions
Source: 212-01-45
[IEV number 442-01-42]FR
indice de tenue au cheminement
ITC (abréviation)
valeur numérique de la tension d'épreuve exprimée en volts, qu'un matériau peut supporter sans cheminement dans des conditions d'essai spécifiées
Source: 212-01-45
[IEV number 442-01-42]EN
DE
FR
Франко-русский словарь нормативно-технической терминологии > ITC (abréviation)
-
9 irradiation des aliments
облучение продуктов питания
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
food irradiation
The most recent addition to food preservation technologies is the use of ionizing radiation, which has some distinct advantages over conventional methods. With irradiation, foods can be treated after packaging, thus eliminating post-processing contamination. In addition, foods are preserved in a fresh state and can be kept longer without noticeable loss of quality. Food irradiation leaves no residues, and changes in nutritional value due to irradiation are comparable with those produced by other processes. Irradiation is the process of applying high energy to a material, such as food, to sterilize or extend its shelf-life by killing microorganisms, insects and other pests residing on it. Sources of ionizing radiation that have been used include gamma rays, electron beams and X-rays. Gamma rays are produced by radioactive isotopes such as Cobalt-60. Electron beams are produced by linear accelerators, which themselves are powered by electricity. The dose applied to a product is the most important factor of the process. At high doses, food is essentially sterilized, just as occurs in canning. Products so treated can be stored at room temperature almost indefinitely. Controversial and banned in some countries. (Source: IFSE / VCN)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Франко-русский словарь нормативно-технической терминологии > irradiation des aliments
См. также в других словарях:
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