-
1 degree
degree [dɪ'gri:]1 noun(a) (unit of measurement) degré m;∎ the temperature is 28 degrees in New York la température est de 28 degrés à New York;∎ we can expect temperatures of 15 to 20 degrees nous pouvons nous attendre à des températures de 15 à 20 degrés;∎ 10 degrees below zero 10 degrés au-dessous de zéro;∎ he had to work in 32 degrees of heat il a dû travailler par une chaleur de 32 degrés;∎ it's 3 degrees outside il fait 3 degrés dehors;∎ Geography Paris is about 2 degrees east of Greenwich Paris est environ à 2 degrés de longitude est de Greenwich;∎ Geometry a 90-degree angle un angle de 90 degrés(b) (extent, amount) degré m;∎ to feel a degree of optimism ressentir un certain optimisme;∎ there was a certain degree of mistrust between them il y avait un certain degré de méfiance entre eux;∎ there are varying degrees of opposition to the new law il y a une opposition plus ou moins forte à la nouvelle loi;∎ his allergy affected him to such a degree that he had to stop working son allergie était un tel handicap pour lui qu'il a dû s'arrêter de travailler(c) (stage, step) degré m;∎ an honour of the highest degree un honneur du plus haut degré;∎ a degree of precision never before thought possible un niveau de précision jusqu'à présent considéré comme inaccessible∎ she has a degree in economics elle a une licence en sciences économiques;∎ he's taking or doing a degree in biology il fait une licence de biologie;∎ I'd like to go on and do a further degree je voudrais continuer après la licence;∎ it took me five years to get my degree j'ai mis cinq ans pour avoir ma licence∎ a man of high degree un homme de haut rang∎ murder in the first degree ≃ homicide m volontairepar degrés, au fur et à mesure;∎ he realized, by degrees, that his wife no longer loved him petit à petit il s'est rendu compte que sa femme ne l'aimait plus(to an extent) jusqu'à un certain point;∎ the Prime Minister does accept criticism to a degree le Premier ministre accepte les critiques, mais jusqu'à un certain point►► University degree ceremony cérémonie f de remise des diplômes;Grammar degree of comparison degré m de comparaison -
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
-
3 turn
A n1 (opportunity, in rotation) tour m ; to wait one's turn attendre son tour ; it's my turn gen c'est mon tour ; ( in game) c'est à moi de jouer ; whose turn is it? gen c'est à qui le tour? ; ( in game) c'est à qui de jouer? ; ‘miss a turn’ ‘passez votre tour’ ; to be sb's turn to do être à qn or au tour de qn de faire ; it's your turn to make the coffee c'est à toi or à ton tour de faire le café ; it was his turn to feel rejected il se sentait rejeté à son tour ; to have a turn on or at or with the computer utiliser l'ordinateur à son tour ; to have a turn at driving prendre son tour de conduite ; to take turns at doing, to take it in turns to do faire qch à tour de rôle ; to do sth turn and turn about faire qch à tour de rôle ; take it in turns! chacun son tour! ; by turns tour à tour ; to feel happy and depressed by turns être tour à tour heureux et malheureux ; to speak out of turn fig commettre un impair ; I hope I haven't spoken out of turn j'espère ne pas avoir commis d'impair ;2 ( circular movement) tour m ; to give sth a turn tourner qch ; to give sth half a turn to the left faire tourner qch d'un demi-tour vers la gauche ; to do a turn [dancer] faire un tour ; to take a turn in the park faire un tour dans le parc ;3 ( in vehicle) virage m ; a 90° turn un virage à 90° ; to make ou do a left/right turn tourner à gauche/à droite ; to do a turn in the road faire un demi-tour ; ‘no left turn’ ‘défense de tourner à gauche’ ;4 (bend, side road) tournant m, virage m ; there's a left turn ahead il y a un tournant or virage à gauche plus loin ; brake before you go into the turn freinez avant de prendre le virage ; take the next right turn, take the next turn on the right prenez la prochaine (rue) à droite ;5 (change, development) tournure f ; the turn of events la tournure des événements ; this is an extraordinary turn of events les événements ont pris une tournure extraordinaire ; to take an encouraging/a worrying turn [events] prendre une tournure encourageante/inquiétante ; to take a turn for the better [person, situation] s'améliorer ; [things, events] prendre une meilleure tournure ; to take a turn for the worse [situation] se dégrader ; [health] s'aggraver ; she has taken a turn for the worse elle va de plus en plus mal ; to be on the turn [luck, milk] commencer à tourner ; [tide] commencer à changer ; ⇒ century ;6 ○ GB ( attack) crise f, attaque f ; she's had one of her turns again elle a eu une nouvelle crise or attaque ; a giddy ou dizzy turn un vertige ; to have a funny turn se sentir tout/-e chose ○ ; it gave me quite a turn, it gave me a nasty turn ça m'a fait un coup ○ ;7 ( act) numéro m ; a comic/variety turn un numéro comique/de variété ; to do a/one's turn faire un/son numéro.1 ( in rotation) [answer, speak] à tour de rôle ; she spoke to each of us in turn elle nous a parlé chacun à notre tour ;2 ( linking sequence) à son tour ; this in turn leads to higher inflation ceci à son tour fait augmenter l'inflation ; I invited Andrew who in turn invited Robert j'ai invité Andrew qui à son tour a invité Robert.C vtr1 ( rotate) [person] tourner [knob, wheel, handle] ; serrer [screw] ; [mechanism] faire tourner [cog, wheel] ; to turn sth to the right/left tourner qch vers la droite/gauche ; to turn sth to ‘on’/‘off’ tourner qch sur (la position) ‘marche’/‘arrêt’ ; to turn a switch through 90 degrees faire tourner un sélecteur de 90 degrés ; to turn sth halfway/the wrong way tourner qch d'un demi-tour/dans le mauvais sens ; to turn the key in the door ou lock ( lock up) fermer la porte à clé ; ( unlock) tourner la clé dans la serrure ; to turn the key on sb enfermer qn à clé ;2 (turn over, reverse) retourner [mattress, soil, steak, collar] ; tourner [page] ; to turn sb onto his side/back retourner qn sur le côté/dos ; to turn one's ankle se tordre la cheville ; it turns my stomach cela me soulève le cœur, cela m'écœure ;3 ( change direction of) tourner [chair, head, face, car] ; to turn a picture to the wall tourner un tableau face au mur ; to turn one's face towards tourner le visage vers ; to turn one's steps towards tourner or diriger ses pas vers ; to turn one's attention ou mind to tourner son attention vers ; to turn one's back on lit tourner le dos à [group, place] ; fig laisser tomber [friend, ally] ; abandonner [homeless, needy] ; as soon as my back is turned lit, fig dès que j'ai le dos tourné ; to turn one' s back on the past tourner la page ; to turn sb from one's door chasser qn ;4 (focus, direction of) to turn sth on sb braquer qch sur qn [gun, hose, torch] ; fig diriger qch sur qn [anger, scorn] ;5 ( transform) to turn sth white/black blanchir/noircir qch ; to turn sth milky/opaque rendre qch laiteux/opaque ; to turn sth into transformer qch en [office, car park, desert] ; to turn water into ice/wine changer de l'eau en glace/vin ; to turn a book into a film adapter un livre pour l'écran ; turn your old newspapers into cash! convertissez vos vieux journaux en argent! ; to turn sb into [magician] changer qn en [frog] ; [experience] faire de qn [extrovert, maniac] ; it turned him from a normal child into a delinquent cela a transformé l'enfant normal qu'il était en délinquant ; to stand there as if turned to stone rester là comme pétrifié ;6 ( deflect) détourner [person, conversation] ; to turn the conversation towards ou onto sth détourner or faire dévier la conversation vers qch ; to turn sb from a course of action/from her purpose détourner qn d'une ligne de conduite/de son but ;7 ○ ( pass the age of) he has turned 50 il a 50 ans passés ; she has just turned 20/30 elle vient d'avoir 20/30 ans ; as soon as I turn 18 dès que j'aurai mes 18 ans ; it's just turned five o'clock il est cinq heures passées ;10 ( in espionage) retourner [spy, agent].D vi1 ( change direction) [person, car, plane, road] tourner ; [ship] virer ; to turn (to the) left/right tourner à gauche/droite ; to turn to the east/the west tourner à l'est/l'ouest ; to turn down ou into tourner dans [street, alley] ; to turn off quitter [main road, street] ; to turn towards tourner en direction de [village, mountains] ; I turned towards home j'ai repris le chemin de la maison ; her thoughts turned to her family ses pensées se sont tournées vers sa famille ; the conversation turned to Ellie on en est venu/ils en sont venus à parler d'Ellie ; he later turned to teaching plus tard il s'est tourné vers l'enseignement ;2 ( reverse direction) [person, vehicle] faire demi-tour ; [tide] changer ; [luck] tourner ; there's no room for the bus to turn le bus n'a pas assez de place pour faire demi- tour ; ‘no turning’ ( in driveway) ‘propriété privée, défense d'entrer’ ; ⇒ turn around ;3 ( revolve) [key, wheel, planet] tourner ; [person] se tourner (to, towards vers) ; to turn on its axis tourner sur son axe ; a key turned in the lock une clé a tourné dans la serrure ; to turn in one's chair se retourner dans sa chaise ; to turn and face the camera se tourner vers la caméra ; to turn and walk out of the room faire demi-tour et sortir de la pièce ; to turn to do se retourner pour faire ; to turn to face sth se retourner vers qch ; to turn and fight se retourner pour se battre ; to turn to lie on one's side se tourner pour se mettre sur le côté ; I turned once again to my book/my work j'ai repris encore une fois ma lecture/mon travail ;4 fig ( hinge) to turn on [argument] tourner autour de [point, issue] ; [outcome] dépendre de [factor] ;6 fig (resort to, rely on) to turn to se tourner vers [person, religion] ; to turn to drink se mettre à boire ; to turn to drugs commencer à se droguer ; to turn to sb for se tourner vers qn pour demander [help, advice, money] ; I don't know who to turn to for advice je ne sais vers qui me tourner pour demander conseil ; I don't know where ou which way to turn je ne sais plus où donner la tête ○ ;7 ( change) to turn into [tadpole] se transformer en [frog] ; [sofa] se transformer en [bed] ; [situation, evening] tourner à [farce, disaster] ; [conversation] tourner à [shouting match] ; ( magically) [person] se transformer en [animal, prince etc] ; to turn to [substance] se changer en [ice, gold etc] ; [fear, surprise] faire place à [horror, relief] ; his hopes had turned to dust ses espoirs étaient réduits en poussière ;8 ( become by transformation) devenir [pale, cloudy, green] ; to turn white/black/red gen blanchir/noircir/rougir ; Chem virer au blanc/noir/rouge ; the weather is turning cold/warm le temps se rafraîchit/se réchauffe ; events turned tragic les événements ont tourné au tragique ;9 ○ ( have change of heart) devenir [Conservative, Communist] ; businesswoman turned politician ancienne femme d'affaires devenue politicienne ; to turn ○ Catholic/Muslim se convertir au catholicisme/à l'islam ; to turn traitor se mettre à trahir ;10 ( go sour) [milk] tourner ;11 [trees, leaves] jaunir.at every turn à chaque instant, à tout moment ; one good turn deserves another Prov c'est un prêté pour un rendu ; to be done to a turn être cuit à point ; to do sb a good turn rendre un service à qn ; to feel another turn of the screw sentir la pression augmenter encore.■ turn against:▶ turn against [sb/sth] se retourner contre ;▶ turn [sb] against retourner [qn] contre [person, ideology].■ turn around:1 ( to face other way) [person] se retourner, faire demi-tour (to do pour faire) ; [bus, vehicle] faire demi-tour ;2 fig you can't just turn around and say you've changed your mind tu ne peux pas tout simplement dire que tu as changé d'avis ; what if he just turns around and says no? et si jamais il disait non? ;3 (revolve, rotate) [object, windmill, dancer] tourner ;4 ( change trend) the market has turned around il y a eu un renversement de situation sur le marché ; sales have turned round il y a eu un renversement de tendance dans les ventes ;5 Transp ( unload and reload) décharger et charger ;▶ turn [sth] around, turn around [sth]1 ( to face other way) tourner [qch] dans l'autre sens [car, chair, piano, head, baby] ;2 ( reverse decline in) redresser [situation, economy, company] ; redresser la situation de [political party, factory] ;3 Transp ( unload and reload) décharger et mettre en état de repartir [plane, ship] ; the plane can be turned around in an hour l'avion peut être déchargé et prêt à reprendre l'air en une heure ;4 ( rephrase) reformuler [question, sentence].■ turn aside se détourner (from de).■ turn away:▶ turn away se détourner ; to turn away in disgust/horror se détourner avec dégoût/horreur ;▶ turn [sth] away, turn away [sth] détourner [head, torch] ;▶ turn [sb] away, turn away [sb] refuser [spectator, applicant] ; ne pas laisser entrer [salesman, caller] ; chasser [beggar] ; I was turned away from the Ritz on ne m'a pas laissé entrer au Ritz.■ turn back:1 ( turn around) ( usu on foot) rebrousser chemin ; ( usu in vehicle) faire demi-tour ; it's too late to turn back lit il est trop tard pour faire demi-tour ; fig il est trop tard pour revenir en arrière ; there's no turning back fig il n'est pas question de revenir en arrière ;2 ( in book) revenir (to à) ;▶ turn [sth] back, turn back [sth]1 ( rotate backwards) reculer [dial, clock] ; to turn one's watch back five minutes retarder sa montre de cinq minutes ;▶ turn [sb] back, turn back [sb] faire faire demi-tour à, refouler [marchers, refugees, heavy vehicles] ; to be turned back at the border être refoulé à la frontière.■ turn down:▶ turn down [graph, curve] descendre ; his mouth turns down at the corners il a une bouche aux commissures tombantes ;▶ turn [sth] down, turn down [sth]1 ( reduce) baisser [volume, radio, heating, light, gas] ;▶ turn [sb/sth] down, turn down [sb/sth] refuser [suitor, candidate, request, application] ; rejeter [offer, suggestion].■ turn in:▶ turn in1 ○ ( go to bed) aller se coucher ;2 ( point inwards) his toes turn in il a les pieds tournés en dedans ; to turn in on itself [leaf, page] se recroqueviller ; to turn in on oneself fig se replier sur soi-même ;▶ turn in [sth], turn [sth] in ○1 ( hand in) rendre [membership, badge, homework] ;2 ( produce) to turn in a profit rapporter un bénéfice ; to turn in a good performance [player] bien jouer ; [company] avoir de bons résultats ; [currency, share] augmenter ;3 (give up, stop) laisser tomber ○ [job, activity] ;▶ turn [sb] in, turn in [sb] livrer [suspect] (to à) ;▶ turn oneself in se livrer.■ turn off:▶ turn off1 ( leave road) tourner ; turn off at the next exit prends la prochaine sortie ;2 [motor, fan] s'arrêter ; where does the light turn off? où est-ce qu'on éteint la lumière? ;▶ turn off [sth], turn [sth] off éteindre [light, oven, TV, radio, computer] ; fermer [tap] ; couper [water, gas, electricity, engine] ; turn that rubbish off! ○ éteins-moi ça! ○ ;■ turn on:▶ turn on [oven, device] s'allumer ;▶ turn on [sth], turn [sth] on allumer [light, oven, TV, radio, computer, gas, electricity] ; ouvrir [tap] ; to turn the water back on rouvrir l'eau ; to turn the electricity back on rétablir le courant ; to turn sth on like a tap fig faire qch sur commande ; to turn on the pressure fig mettre la pression ; ⇒ charm, heat ;▶ turn [sb] on, turn on [sb] ○ exciter ; to be turned on être excité (by par) ; to turn sb on to sth ○ brancher ○ qn sur [drug].■ turn out:▶ turn out1 ( be eventually) to turn out well/badly bien/mal se terminer ; to turn out differently prendre une tournure différente ; to turn out all right s'arranger ; it depends how things turn out cela dépend de la façon dont les choses vont tourner ; that child will turn out badly cet enfant tournera mal ; to turn out to be ( prove to be) se révéler, s'avérer être ; to turn out to be wrong se révéler faux ; the job turned out (to be) difficult finalement le travail a été difficile, le travail s'est avéré difficile fml ; it turned out to be a good decision finalement cela a été une bonne décision, cela s'est avéré être une bonne décision fml ; it turns out that il se trouve que, il s'avère que ; it turned out (that) she knew him il s'est trouvé qu'elle le connaissait ; as it turned out en fin de compte ;2 ( come out) [crowd, people] venir (to do pour faire ; for à) ; the fans turn out every Saturday les fans sont là tous les samedis ; we had to turn out at six GB il fallait être là à six heures ;3 ( point outwards) his toes ou feet turn out il a les pieds tournés en dehors ;▶ turn [sth] out, turn out [sth]1 ( turn off) éteindre [light] ;4 to turn one's toes ou feet out marcher en canard ;▶ turn [sb] out, turn out [sb]1 ( evict) mettre [qn] à la porte ; to turn sb out into the street jeter qn à la rue ;■ turn over:1 ( roll over) [person] se retourner ; [car] se retourner, faire un tonneau ; [boat] se retourner, chavirer ; to turn over and over [person, object] faire plusieurs tours ; [car] faire plusieurs tonneaux ;2 ( turn page) tourner la page ;3 [engine] se mettre en marche ;▶ turn [sth/sb] over, turn over [sth/sb]1 ( turn) tourner [page, paper] ; retourner [card, object, mattress, soil, baby, patient] ; faire chavirer [ship] ; he turned the car over sa voiture a fait un tonneau ;2 ( hand over) remettre [object, money, find, papers] (to à) ; livrer [person, fugitive] (to à) ; remettre la succession de [company, business] (to à) ; transmettre [control, power] (to à) ; I'm turning the new recruits over to you les nouvelles recrues sont à vous ;3 ( reflect) I've been turning it over in my mind j'y ai bien réfléchi ;6 [battery, starter motor] faire tourner [engine].■ turn to† GB se mettre au travail, s'y mettre.■ turn up:▶ turn up1 (arrive, show up) arriver, se pointer ○ (to, at à ; for pour) ; to turn up late arriver en retard ; to turn up in jeans se pointer ○ en jean ; she didn't turn up elle ne s'est pas pointée ○ ; guess who turned up at the station devine qui s'est pointé ○ à la gare ;2 ( be found) don't worry-it will turn up ne t'inquiète pas-tu finiras par le retrouver ;3 ( present itself) [opportunity, job] se présenter ; something will turn up (for me/for you etc) je finirai/tu finiras etc par trouver quelque chose ;▶ turn up [sth], turn [sth] up1 (increase, intensify) augmenter [heating, lighting, volume, gas] ; mettre [qch] plus fort [TV, radio, music] ;3 ( discover) déterrer [buried object] ; [person] dénicher ○ [discovery, information] ; facts turned up by the inquiry faits révélés or mis au jour par l'enquête.
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