-
1 maximum
1 noun∎ a maximum of forty people un maximum de quarante personnes, quarante personnes au maximum;∎ at the maximum au (grand) maximum;∎ to the maximum au maximum(b) (in snooker, darts) maximum mmaximum, maximal;∎ maximum temperatures températures fpl maximales3 adverbau maximum;∎ it happens twice a year maximum ça se produit deux fois par an au maximum;∎ you can stay for two hours maximum vous ne pouvez pas rester plus de deux heures►► maximum efficiency rendement m maximum;maximum load charge f maximale ou limite;maximum security prison prison f de haute sécurité;maximum speed (highest possible) vitesse f maximale ou maximum; (highest permitted) vitesse f limite -
2 maximum
-
3 maximum
1. noun, pl. maxima Maximum, das2. adjectivemaximal; Maximal-maximum temperatures today around 20° — Höchsttemperaturen am Tage um 20°
* * *1. ['mæksiməm] adjective(greatest: This requires maximum effort / the maximum amount of effort.) höchst2. [-mə] noun(the greatest number or quantity or the highest point or degree: Two hundred an hour is the maximum we can produce.) das Maximum* * *maxi·mum[ˈmæksɪməm]I. adj attr, inv maximal, Höchst-, Maximal-\maximum amount Höchstbetrag m, Maximalbetrag m\maximum depth/height maximale Tiefe/Höhe\maximum limit Obergrenze f, Höchstgrenze f\maximum temperature Höchsttemperatur fthis car has a \maximum speed of 160 kph dieses Auto hat eine Höchstgeschwindigkeit von 160 km/hII. n[-ɪmə]Maximum ntthat's the \maximum das ist das Maximumshe intends to exploit this opportunity to the \maximum sie hat vor, diese Chance bestmöglich zu nutzenIII. adv maximalit'll take us 2 days \maximum dafür werden wir maximal 2 Tage brauchen* * *['mksɪməm]1. adj attrHöchst-; size, height, costs, length maximalmaximum penalty/sentence — Höchststrafe f
maximum credible accident — größter anzunehmender Unfall, GAU m
for maximum effect —
he scored maximum points — er hat die höchste Punktzahl erreicht
a maximum speed of... — eine Höchstgeschwindigkeit von...
we are producing at maximum speed — wir produzieren mit maximaler Geschwindigkeit
maximum security wing/prison — Hochsicherheitstrakt m/-gefängnis nt
2. n pl - s or maxima['mksɪmə] Maximum ntup to a maximum of £8 — bis zu maximal or höchstens £ 8
temperatures reached a maximum of 34° — die Höchsttemperatur betrug 34°
£20 at the maximum — maximal 20 Pfund
my salary is now at its maximum — ich bin jetzt in der höchsten or obersten Gehaltsstufe
3. adv(= at the most) maximal* * *maximum [ˈmæksıməm]A pl -ma [-mə], -mums s1. Maximum n, Höchstgrenze f, -maß n, -stand m, -wert m, -zahl f:at the absolute maximum allerhöchstens;smoke a maximum of five cigarettes a day maximal fünf Zigaretten am Tag rauchen;the lamp gives the maximum of light die Lampe gibt optimales Licht;the maximum of cooperation die bestmögliche Zusammenarbeit2. MATH Höchstwert m (einer Funktion), Scheitel m (einer Kurve)3. WIRTSCH Höchstpreis m, -angebot n, -betrag mB adj1. höchst(er, e, es), maximal, Höchst…, Maximal…:maximum credible accident größter anzunehmender Unfall, GAU m;maximum-minimum thermometer Maximum-Minimum-Thermometer n;maximum performance Höchst-, Spitzenleistung f;maximum (permissible) speed (zulässige) Höchstgeschwindigkeit;maximum-security prison Hochsicherheitsgefängnis n;2. höchstzulässig:maximum punishment Höchststrafe f* * *1. noun, pl. maxima Maximum, das2. adjectivemaximal; Maximal-maximum security prison — Hochsicherheitsgefängnis, das
maximum temperatures today around 20° — Höchsttemperaturen am Tage um 20°
* * *adj.höchster adj.lokales / globales (Mathematik) adj.maximal adj. n.Maximum -e n. -
4 high
high [haɪ]haut ⇒ 1 (a), 1 (b), 1 (d), 1 (f), 1 (g), 1 (m), 1 (o), 1 (p), 2 (a), 2 (b), 3 (a), 3 (b) élevé ⇒ 1 (b)-(e), 1 (k) grand ⇒ 1 (c), 1 (d) noble ⇒ 1 (e) aigu ⇒ 1 (g) excité ⇒ 1 (s) en haut ⇒ 2 (a)∎ how high is that building? quelle est la hauteur de ce bâtiment?;∎ the walls are three metres high les murs ont ou font trois mètres de haut, les murs sont hauts de trois mètres;∎ the building is eight storeys high c'est un immeuble de ou à huit étages;∎ the highest mountain in the country la plus haute montagne du pays;∎ when I was only so high quand je n'étais pas plus grand que ça∎ built on high ground construit sur un terrain élevé;∎ the sun was high in the sky le soleil était haut(c) (above average → number) grand, élevé; (→ speed, value) grand; (→ cost, price, rate) élevé; (→ salary) élevé, gros (grosse); (→ pressure) élevé, haut; (→ polish) brillant;∎ to the highest degree au plus haut degré, à l'extrême;∎ of the highest importance de première importance;∎ to pay a high price payer le prix fort;∎ to fetch a high price se vendre cher;∎ to make a higher bid faire une offre supérieure, surenchérir;∎ highest bidder surenchérisseur(euse) m,f;∎ she suffers from high blood pressure elle a de la tension;∎ also figurative to play for high stakes jouer gros (jeu);∎ built to withstand high temperatures conçu pour résister à des températures élevées;∎ he has a high temperature il a beaucoup de température ou fièvre;∎ areas of high unemployment des régions à fort taux de chômage;∎ ore with a high mineral content minerai m à haute teneur;∎ milk is high in calcium le lait contient beaucoup de calcium;∎ high winds des vents mpl violents, de grands vents mpl;∎ Mathematics the highest common factor le plus grand commun diviseur(d) (better than average → quality) grand, haut; (→ standard) haut, élevé; (→ mark, score) élevé, bon; (→ reputation) bon;∎ our chances of success remain high nos chances de succès restent très bonnes;∎ to have a high opinion of sb avoir une bonne ou haute opinion de qn;∎ he has a high opinion of himself il a une haute idée de lui-même;∎ to have a high profile être très en vue;∎ she speaks of you in the highest terms elle dit le plus grand bien de vous;∎ one of the highest honours in the arts l'un des plus grands honneurs dans le monde des arts;∎ a man of high principles un homme qui a des principes (élevés);∎ he took a very high moral tone il prit un ton très moralisateur;∎ she has very high moral standards elle a des principes (de moralité) très élevés(f) (of great importance or rank) haut, important;∎ a high official un haut fonctionnaire;∎ we have it on the highest authority nous le tenons de la source la plus sûre;∎ to have friends in high places avoir des relations haut placées, avoir le bras long;∎ of high rank de haut rang∎ high summer plein été m;∎ it was high summer c'était au cœur de l'été;∎ it's high time we were leaving il est grand temps qu'on parte∎ resentment was high il y avait énormément de ressentiment;∎ moments of high drama des moments mpl extrêmement dramatiques;∎ high adventure grande aventure f;∎ to be high farce tourner à la farce∎ to have a high colour avoir le visage congestionné(k) (elaborate, formal → language, style) élevé, soutenu(l) (prominent → cheekbones) saillant∎ the highest card la carte maîtresse∎ a high Tory un tory ultra-conservateur;∎ a high Anglican un(e) anglican(e) de tendance conservatrice∎ to be in high spirits être plein d'entrain;∎ our spirits were high nous avions le moral;∎ high on cocaine défoncé à la cocaïne;∎ figurative they were high on success ils ne se sentaient plus après ce succès;∎ figurative he gets high on sailing il prend son pied en faisant de la voile;∎ they were (as) high as kites (drunk) ils étaient bien partis; (drugged) ils planaient; (happy) ils avaient la pêche2 adverb∎ up high en haut;∎ higher up plus haut;∎ higher and higher de plus en plus haut;∎ he raised both hands high il a levé les deux mains en l'air;∎ the kite flew high up in the sky le cerf-volant est monté très haut dans le ciel;∎ she threw the ball high into the air elle a lancé le ballon très haut;∎ the geese flew high over the fields les oies volaient très haut au-dessus des champs;∎ the shelf was high above her head l'étagère était bien au-dessus de sa tête;∎ he rose high in the company il a accédé aux plus hauts échelons de la société;∎ figurative we looked high and low for him nous l'avons cherché partout;∎ figurative to set one's sights high, to aim high viser haut;∎ figurative they're flying high ils visent haut, ils voient grand;∎ also figurative to hold one's head high porter la tête haute;∎ figurative to leave sb high and dry laisser qn en plan(b) (in intensity) haut;∎ they set the price/standards too high ils ont fixé un prix/niveau trop élevé;∎ I turned the heating up high j'ai mis le chauffage à fond;∎ he rose higher in my esteem il est monté encore plus dans mon estime;∎ salaries can go as high as £50,000 les salaires peuvent monter jusqu'à ou atteindre 50 000 livres;∎ I had to go as high as £50 il a fallu que j'aille ou que je monte jusqu'à 50 livres;∎ the card players played high les joueurs de cartes ont joué gros (jeu);∎ feelings were running high les esprits se sont échauffés∎ I can't sing that high je ne peux pas chanter aussi haut∎ to live high off or on the hog vivre comme un roi ou nabab3 noun∎ humorous the decision came from on high la décision fut prononcée en haut lieu(b) (great degree or level) haut m;∎ to reach a new high atteindre un nouveau record;∎ prices are at an all-time high les prix ont atteint leur maximum;∎ the Stock Market reached a new high la Bourse a atteint un nouveau record ou maximum;∎ the highs and lows (of share prices, career, life) les hauts mpl et les bas mpl(c) (setting → on iron, stove)∎ I put the oven on high j'ai mis le four sur très chaud∎ she's been on a permanent high since he came back elle voit tout en rose depuis son retour∎ Religion the Most High le Très-Haut►► Religion high altar maître-autel m;History High Antiquity Haute Antiquité f;Swimming high board plongeoir m le plus haut;high camp (affectation) affectation f, cabotinage m; (effeminate behaviour) manières fpl efféminées; (style) kitsch m;high chair chaise f haute (pour enfants);1 noun= fraction de l'Église d'Angleterre accordant une grande importance à l'autorité du prêtre, au rituel etc(a) = de tendance conservatrice dans l'Église anglicane;British Religion High Churchman = membre du mouvement conservateur à l'intérieur de l'Église anglicane;high comedy Theatre comédie f au dialogue brillant;∎ figurative the debate ended in scenes of high comedy le débat se termina par des scènes du plus haut comique;Military high command haut commandement m;Administration high commission haut-commissariat m;Administration high commissioner haut-commissaire m;Law the High Court (of Justice) ≃ le tribunal de grande instance (principal tribunal civil en Angleterre et au pays de Galles);Law High Court judge ≃ juge m du tribunal de grande instance;Law the High Court of Judiciary = la plus haute instance de justice en Écosse;Military high explosive explosif m puissant;high fashion haute couture f;high fidelity haute-fidélité f;high finance haute finance f;familiar high five = tape amicale donnée dans la paume de quelqu'un, bras levé, pour le saluer, le féliciter ou en signe de victoire;∎ they always give each other a high five when they meet ils se tapent dans la main à chaque fois qu'ils se voient;Electronics high frequency haute fréquence f;∎ figurative they moved into high gear ils se sont dépêchés;High German haut allemand m;high heels hauts talons mpl;high jump Sport saut m en hauteur;∎ British familiar figurative you're for the high jump when he finds out! qu'est-ce que tu vas prendre quand il l'apprendra!;Sport high jumper sauteur(euse) m,f (qui fait du saut en hauteur);the high life la grande vie;∎ she has a taste for the high life elle a des goûts de luxe;∎ to lead or to live the high life mener la grande vie;Computing high memory mémoire f haute;Computing high memory area zone f de mémoire haute;History the High Middle Ages le Haut Moyen Âge;high noon plein midi m;∎ at high noon à midi pile;American Transport High Occupancy Vehicle = voiture particulière transportant au moins deux passagers;Religion high place haut lieu m;high point (major event → of news) événement m le plus marquant; (→ of evening, holiday) point m culminant, grand moment m; (→ of film, novel) point m culminant;∎ the high point of the party le clou de la soirée;high priest Religion grand prêtre m;∎ figurative the high priests of fashion les gourous mpl de la mode;high priestess Religion grande prêtresse f;∎ figurative the high priestess of rock la grande prêtresse du rock;Linguistics high register language langage m élevé ou soutenu;Art high relief haut-relief m;high rise tour f (immeuble);high road (main road) route f principale, grand-route f; figurative (most direct route) bonne voie f;∎ he's on the high road to success il est en bonne voie de réussir;∎ the high road to fame la voie de la gloire;high school School (in UK) = établissement d'enseignement secondaire regroupant collège et lycée; (in US) lycée m;∎ she's still at high school elle est toujours scolarisée ou va toujours au lycée;the high seas la haute mer;∎ on the high seas en haute ou pleine mer;high season haute ou pleine saison f;∎ during the high season en haute ou pleine saison;British Administration High Sheriff = dans les comtés anglais et gallois, représentant officiel du monarque;American high sign signe m;∎ to give sb the high sign faire signe à qn;high society haute société f, grand monde m;high spirits pétulance f, vitalité f, entrain m;∎ to be in high spirits avoir de l'entrain, être plein d'entrain;∎ to put sb in high spirits mettre qn de bonne humeur;(a) (major event → of news) événement m le plus marquant; (→ of evening, holiday) point m culminant, grand moment m; (→ of film, novel) point m culminant∎ we hit all the high spots (tourists) nous avons vu toutes les attractions touristiques;British the high street (street) la grand-rue, la rue principale; (shops) les commerçants mpl, le commerce;∎ Commerce & Economics the high street has been badly hit by the recession les commerçants ont été durement touchés par la récession;British high table (for guests of honour) table f d'honneur; School & University table f des professeurs;British high tea = repas léger pris en début de soirée et accompagné de thé;∎ at high tide à marée haute;Theatre high tragedy grande tragédie f;high treason haute trahison f;Electricity high voltage haute tension f;∎ the river is at high water le fleuve est en crue;high wire corde f raide ou de funambule;∎ to walk the high wire marcher sur la corde raide -
5 peak
pi:k
1. noun1) (the pointed top of a mountain or hill: snow-covered peaks.) pico, cumbre2) (the highest, greatest, busiest etc point, time etc: He was at the peak of his career.) cumbre, cúspide, apogeo3) (the front part of a cap which shades the eyes: The boy wore a cap with a peak.) visera
2. verb(to reach the highest, greatest, busiest etc point, time etc: Prices peaked in July and then began to fall.) llegar al punto más alto- peaked- peaky
peak n1. cima / cumbre / pico2. viseratr[piːk]2 figurative use (highest point) cumbre nombre femenino, cúspide nombre femenino, punto álgido; (climax) apogeo, punto culminante3 (of cap) visera1 (maximum) máximo,-a1 (demand, sales, etc) alcanzar su nivel más alto, alcanzar su punto máximo; (career) alcanzar su apogeo; (athlete) alcanzar su mejor momento\SMALLIDIOMATIC EXPRESSION/SMALLpeak hours horas nombre femenino plural puntapeak season temporada altapeak ['pi:k] vi: alcanzar su nivel máximopeak adj: máximopeak n1) point: punta f2) crest, summit: cima f, cumbre f3) apex: cúspide f, apogeo m, nivel m máximon.• cima s.f.• cresta s.f.• cumbre s.f.• cúspide s.f.• pico s.m.• picota s.f.
I piːka) ( of mountain) cima f, cumbre f, cúspide f (frml or liter); ( mountain) pico m; ( of cap) visera fb) ( highest point)to reach a peak — alcanzar* su punto álgido
at the peak of her career — en el apogeo or la cúspide de su carrera
II
adjective (before n)a) ( maximum) <level/power> máximoto be in peak condition — \<\<athlete/horse\>\> estar* en plena forma
b) ( busiest)during peak hours — durante las horas de mayor demanda (or consumo etc)
peak viewing figures — cifras fpl de máxima audiencia
peak season — temporada f alta
III
intransitive verb alcanzar* su nivel más alto or su punto máximo/su mejor momento[piːk]1. N1) [of mountain] cumbre f, cima f ; (=mountain itself) pico m ; (=point) (also of roof) punta f ; (on graph) pico m2) [of cap] visera f3) (=high point) [of career, fame, popularity] cumbre f, cúspide f•
she died at the peak of her career — murió cuando estaba en la cumbre or la cúspide de su carrerato be at the peak of fitness — estar en condiciones óptimas, estar en plena forma
•
the heyday of drugs has passed its peak — ya ha pasado la época de máximo apogeo de las drogas•
house prices reached a peak in 1988 — el precio de las viviendas alcanzó su nivel máximo en 1988widow 2.computer technology has not yet reached its peak — la tecnología informática aún no ha alcanzado su cumbre or cúspide
2.VI [temperatures] alcanzar su punto más alto; [inflation, sales] alcanzar su nivel máximo; [crisis] alcanzar su momento crítico; [career] alcanzar su cumbre or su cúspide; [sportsperson] alcanzar su mejor momento3. ADJ(before noun)1) (=top)•
in peak condition — (athlete) en óptimas condiciones, en plena forma; (animal) en óptimas condiciones2) (=busiest)•
peak time — (TV) horas fpl de máxima audiencia; (Telec, Elec) horas fpl de máxima demanda; (=rush hour) horas fpl puntait is more expensive to call at peak times — resulta más caro llamar durante las horas de máxima demanda
4.CPDpeak rate N — (Telec) tarifa f alta
peak season N — temporada f alta
* * *
I [piːk]a) ( of mountain) cima f, cumbre f, cúspide f (frml or liter); ( mountain) pico m; ( of cap) visera fb) ( highest point)to reach a peak — alcanzar* su punto álgido
at the peak of her career — en el apogeo or la cúspide de su carrera
II
adjective (before n)a) ( maximum) <level/power> máximoto be in peak condition — \<\<athlete/horse\>\> estar* en plena forma
b) ( busiest)during peak hours — durante las horas de mayor demanda (or consumo etc)
peak viewing figures — cifras fpl de máxima audiencia
peak season — temporada f alta
III
intransitive verb alcanzar* su nivel más alto or su punto máximo/su mejor momento -
6 continuous current-carrying capacity
длительная пропускная способность по току
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]Тематики
- электротехника, основные понятия
EN
(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
Англо-русский словарь нормативно-технической терминологии > continuous current-carrying capacity
-
7 ampacity (US)
(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
Англо-русский словарь нормативно-технической терминологии > ampacity (US)
-
8 continuous current
(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
непрерывный ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999]Тематики
- электротехника, основные понятия
EN
Англо-русский словарь нормативно-технической терминологии > continuous current
-
9 current-carrying capacity
(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
предельно допустимый ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]Тематики
- электротехника, основные понятия
EN
прочность печатной платы к токовой нагрузке
Свойство печатной платы сохранять электрические и механические характеристики после воздействия максимально допустимой токовой нагрузки на печатный проводник или металлизированное отверстие печатной платы.
[ ГОСТ Р 53386-2009]Тематики
EN
Англо-русский словарь нормативно-технической терминологии > current-carrying capacity
-
10 minimum
1.keep something to a minimum — etwas so gering wie möglich halten
2. attributive adjectivea minimum of £5 — mindestens 5 Pfund
minimum temperatures tonight around 5° — nächtliche Tiefsttemperaturen um 5°
minimum wage — Mindestlohn, der
* * *1. ['miniməm] adjective(smallest or lowest (possible, obtained, recorded etc): the minimum temperature last night.) Mindest-...2. [-mə] noun(the smallest possible number, quantity etc or the lowest level: Tickets will cost a minimum of $20.) das Minimum- academic.ru/47076/minimal">minimal- minimize
- minimise* * *mini·mum[ˈmɪnɪməm]I. n<pl -s or -ima>Minimum nta \minimum of 3 hours mindestens 3 Stundena \minimum of effort/time/risk ein Minimum an Aufwand/Zeit/Risikoto keep sth to a \minimum etw so niedrig wie möglich haltento reduce sth to a \minimum etw auf ein Minimum reduzieren1. (lowest possible) Mindest-\minimum amount Mindestbetrag m, Minimalbetrag m\minimum requirements Mindestanforderungen pl2. (very low) Minimal-, minimal\minimum weight Minimalgewicht nt* * *['mInɪməm]1. nMinimum ntthe temperature fell to a minimum of 5 degrees — die Temperatur fiel auf Tiefstwerte von 5 Grad
with a minimum of inconvenience — mit einem Minimum an Unannehmlichkeiten
what is the minimum you will accept? — was ist für Sie das Minimum or der Mindestbetrag?
a minimum of 2 hours/£50/10 people — mindestens 2 Stunden/£ 50/10 Leute
to keep sth to a or the minimum —
2. adj attrMindest-minimum age — Mindestalter nt
to achieve maximum possible profits from minimum possible expenditure — möglichst hohe Gewinne mit möglichst geringen Ausgaben erzielen
the minimum expenditure will be... — das wird mindestens... kosten
a minimum level of discontent the minimum level of aluminium in the body — ein Mindestmaß nt an Unzufriedenheit die Mindestmenge von Aluminium im Körper
* * *minimum [ˈmınıməm]A pl -ma [-mə] s Minimum n:a) Mindestmaß n, -betrag m, -wert mat a minimum auf dem Tiefststand;with a minimum of effort mit einem Minimum an Anstrengung;keep the cost down a minimum die Kosten so gering oder niedrig wie möglich halten;minimum age Mindestalter n;minimum capacity ELEKa) Minimumkapazität f,b) Anfangskapazität f (eines Drehkondensators);minimum price Mindestpreis m;a) MATH Kleinst-, Mindest-, Minimal-, Minimumwert m,min. abk2. mineralogy3. minimum4. mining* * *1.2. attributive adjectivea minimum of £5 — mindestens 5 Pfund
minimum temperatures tonight around 5° — nächtliche Tiefsttemperaturen um 5°
minimum wage — Mindestlohn, der
* * *adj.lokales / globales (Mathematik) adj. n.(§ pl.: minimums, or: minima)= Mindestmaß n.Minimum -a n. -
11 spread
1 noun(a) (diffusion, growth → of epidemic, fire) propagation f, progression f; (→ of technology, idea) diffusion f, dissémination f; (→ of religion) propagation f;∎ they are trying to prevent the spread of unrest to other cities ils essaient d'empêcher les troubles d'atteindre ou de gagner d'autres villes(b) (range → of ages, interests) gamme f, éventail m;∎ spread in interest rates différentiel m de taux d'intérêt;∎ the commission represented a broad spread of opinion la commission représentait un large éventail d'opinions;∎ maximum May temperatures show a ten-point spread les températures maximales du mois de mai montrent une variation de dix degrés(c) (of wings) envergure f∎ growth occurred over a spread of several years la croissance s'étala sur une période de plusieurs années∎ salmon spread beurre m de saumon;∎ chocolate spread chocolat m à tartiner(h) Press & Typography (two pages) double page f; (two-page advertisement) double page f publicitaire;∎ the event was given a good spread l'événement a été largement couvert par la presse∎ the hotel lays on a decent spread l'hôtel propose des repas tout à fait convenables□ ;∎ cold spread repas m froid□∎ nice spread you've got here! belle propriété que vous avez là!(k) Stock Exchange spread m(a) (arms, fingers, legs) écarté∎ I spread mustard on the ham, I spread the ham with mustard j'ai étalé de la moutarde sur le jambon;∎ he spread butter on a slice of toast or a slice of toast with butter il a tartiné de beurre une tranche de pain grillé;∎ to spread ointment on a burn appliquer ou mettre de la pommade sur une brûlure;∎ to spread the paint evenly étendre ou étaler la peinture en couches égales(b) (open out, unfold → wings, sails) étendre, déployer; (→ arms, legs, fingers) écarter; (→ map, napkin, blanket) étaler; (→ rug) étendre; (→ fan) ouvrir;∎ he spread his handkerchief over his face il étala son mouchoir sur son visage;∎ she lay on her back, her arms spread elle était allongée sur le dos, les bras écartés;∎ a bird with its wings spread un oiseau aux ailes déployées;∎ figurative it's time you spread your wings il est temps que vous voliez de vos propres ailes(c) (disseminate → disease, fire) propager, répandre; (→ news, idea, faith) propager; (→ rumour) répandre, faire courir; (→ lies) colporter; (→ terror, panic) répandre;∎ the disease is spread by rats la maladie est propagée par les rats;∎ the wind will spread the fire to the fields le vent va propager l'incendie jusque dans les champs;∎ trade helped to spread the new technology to Asia le commerce a facilité la diffusion ou la dissémination de cette nouvelle technologie en Asie;∎ the attack is at noon, spread the word! l'attaque est pour midi, faites passer ou passez le mot!;∎ to spread the gospel prêcher ou répandre l'Évangile; figurative répandre la bonne parole∎ he spread his papers on the desk il étala ses papiers sur le bureau;∎ her hair was spread over the pillow ses cheveux s'étalaient sur l'oreiller;∎ we spread the contents of the bag over the floor nous étalâmes le contenu du sac sur le sol;∎ the floor was spread with straw le sol était recouvert de paille;∎ take your shoes off, you're spreading dirt everywhere! enlève tes chaussures, tu salis tout!;∎ the explosion had spread debris over a large area l'explosion avait dispersé des débris sur une grande superficie;∎ their troops are spread too thinly to be effective leurs troupes sont trop dispersées pour être efficaces;∎ figurative to spread oneself too thinly se disperser(e) (space out over a period of time) échelonner, étaler;∎ the tourist season is now spread over six months la saison touristique s'étale maintenant sur six mois;∎ the payments are spread over several months les paiements sont échelonnés ou étalés ou répartis sur plusieurs mois;∎ to spread the losses over five years répartir les pertes sur cinq ans(f) (divide up → tax burden, work load) répartir;∎ a policy designed to spread wealth more evenly une mesure qui vise à distribuer plus équitablement les richesses(a) (stain) s'élargir; (disease, fame, suburb) s'étendre; (fire, desert, flood) gagner du terrain, s'étendre; (rumour, ideas, faith, terror, crime, suspicion) se répandre;∎ panic spread through the crowd la panique a envahi ou gagné la foule;∎ the epidemic is spreading to other regions l'épidémie gagne de nouvelles régions;∎ the cancer had spread through her whole body le cancer s'était généralisé;∎ the suburbs are spreading further everyday les banlieues s'étendent chaque jour un peu plus;∎ the flood waters have spread across or over the whole plain l'inondation a gagné toute la plaine;∎ the species spread throughout Africa l'espèce s'est répandue à travers toute l'Afrique(b) (extend → over a period of time, a range of subjects) s'étendre;∎ their correspondence spreads over twenty years leur correspondance s'étend sur vingt ans(c) (butter, glue) s'étaler;∎ the icing should spread easily le glaçage devrait s'étaler facilement(d) Stock Exchange spéculer sur les différentiels de cours►► spread betting = système de paris portant sur le résultat d'un événement sportif ou autre, où les gains sont proportionnels à la justesse des prédictions, selon une fourchette de résultats préétablie;(b) (in skating) grand aigle m;∎ to do a spread eagle faire un grand aigle(rumour) répandre;∎ have you been spreading it about that I…? est-ce que tu as été raconter partout que je…?(a) (disperse) disperser, éparpiller;∎ the buildings are spread out among the trees les bâtiments sont dispersés parmi les arbres;∎ the runners are now spread out (along the course) les coureurs sont maintenant éparpillés le long du parcours;∎ the population is very spread out la population est très dispersée;∎ in a city as spread out as Los Angeles dans une ville aussi étendue que Los Angeles(b) (space out in time → deliveries, payments) échelonner;∎ to spread out over several financial years étaler sur plusieurs exercices;∎ to spread out the losses over five years répartir les pertes sur cinq ans(c) (open out, unfold → wings) étendre, déployer; (→ arms, legs, fingers) écarter; (→ map, napkin, blanket) étaler; (→ rug) étendre; (→ fan) ouvrir; (lay out → photos, cards, possessions) étaler;∎ she lay on her back, her arms spread out elle était allongée sur le dos, les bras écartés;∎ a bird with its wings spread out un oiseau aux ailes déployées;∎ to spread oneself out (on sofa etc) s'étendre, s'allonger;∎ the plain lay spread out in front of us la plaine s'étalait ou se déployait devant nous;∎ he spread his papers out on the desk il étala ses papiers sur le bureau;∎ their troops are spread out too thinly to be effective leurs troupes sont trop dispersées pour être efficaces(a) (town, forest) s'étendre∎ the search party had spread out through the woods l'équipe de secours s'était déployée à travers les bois(c) (open out → sail) se déployer, se gonfler(d) (make oneself at ease) s'installer confortablement;∎ I need an office where I can spread out j'ai besoin d'un bureau où je puisse étaler mes affaires -
12 range
1. n ряд, линия; цепь, вереница2. n серия, рядrange of — ряд; множество
3. n редк. строй, шеренга4. n линия; направление5. n сфера, зона; область, круг; поле, аренаa wide range of interests — разнообразные интересы; широкий круг интересов
Latin is out of my range — латынь — это не по моей части
variable range — область переменной; переменный диапазон
6. n пределы7. n эк. изменение, колебание, движение8. n размах9. n физ. размах колебаний10. n протяжение, пространство; пределы11. n спец. радиус действия; предел применения; досягаемостьover the range — в пределах; в диапазоне
12. n спец. диапазонfrequency range — радио диапазон частот, частотный диапазон
13. n спец. чувствительность14. n спец. мощность15. n мат. область значений функций16. n дальность; расстояние, дистанцияat long range — на большом расстоянии; далеко; издали
17. n радио дальность передачиrecord range — пристрелянная дальность по реперу, ориентиру
18. n воен. дальнобойность, дальность19. n воен. прицел20. n переход с места на место; блужданиеfree range — полный простор, полная свобода
21. n открытая местность, степь22. n охотничье угодье23. n с. -х. неогороженное пастбище24. n ассортимент, сортамент; номенклатура25. n спец. шкала26. n биол. ареал; район обитания; область распространения27. n биол. период существования на Земле28. n биол. редк. класс, слой29. n биол. физ. длина пробега, пробег30. n спец. степень31. n спец. класс, разряд32. n спец. спорт. направление атаки33. n спец. мор. ряд портов, порты34. n спец. мор. створ35. n спец. воен. полигон, стрельбище; тирrifle range — тир, стрельбище
36. n спец. амер. геод. меридианный ряд населённых пунктов37. n спец. амер. двусторонний стеллаж38. v выстраивать в ряд; ставить, располагать в порядке39. v обыкн. выстраиваться, строиться в ряд; становиться, располагаться в порядке40. v простираться; тянуться вдольhouses that range along the railway — дома, которые тянутся вдоль железной дороги
41. v стоять на одной линии42. v быть на одном уровне, стоять наравне; относиться к числуhe ranges with the great writers — он стоит в одном ряду с великими писателями; он относится к числу великих писателей
43. v занимать определённую позицию44. v редк. вовлекать, привлекать45. v колебаться в определённых пределах46. v поэт. бродить, блуждать; странствовать; исколесить47. v бродить; блуждатьto range far and wide — отвлекаться от темы, уходить в сторону
48. v охватыватьresearches ranging over a wide field — изыскания, охватывающие широкую сферу
49. v классифицировать; систематизировать; распределять по категориям; относить к классу, разрядуluxury range — изделия категории " люкс "
50. v книжн. убирать, приводить в порядок51. v наводить, нацеливать52. v мор. воен. передвигаться, перемещаться53. v воен. двигаться впереди, в первом эшелоне54. v мор. проходить, обгонять55. v редк. проявлять непостоянство56. v биол. водиться, встречаться57. v с. -х. выпасать скот на неогороженном пастбище58. v полигр. выравнивать59. v мор. идти параллельно; проходить мимо, вдоль60. v мор. отпускать канат якоря61. v воен. определять расстояние до цели62. v воен. пристреливать цель по дальности; пристреливаться63. n кухонная плита64. n тех. агрегат, установкаdyeing range — агрегат для крашения; красильная установка
Синонимический ряд:1. ambit (noun) ambit; capacity; circle; compass; confine; confines; dimensions; extension; extensity; extent; grasp; horizon; ken; limits; orbit; panorama; purview; radius; realm; scope; sphere; stretch; sweep; width2. class (noun) class; kind; rank; sort3. diapason (noun) diapason; gamut; scale; spectrum4. distance (noun) distance; limit; reach5. expanse (noun) area; expanse; length; region6. grassland (noun) grassland; meadow; pasture; prairie7. habitat (noun) habitat; haunt; home; locality; site; stamping ground8. mountain range (noun) chain; group; mountain range; sierra9. order (noun) extent; magnitude; matter; neighborhood; order; tune; vicinity10. row (noun) file; line; row; series; tier11. extend (verb) extend; fluctuate; go; lie; occupy; run; stretch out; vary12. group (verb) arrange; array; assort; class; classify; dispose; distribute; group; marshal; order; organise; rank; sort; systematise13. line (verb) align; allineate; line; line up14. wander (verb) bat; circumambulate; drift; encompass; explore; gad; gad about; gallivant; maunder; meander; mooch; peregrinate; ramble; roam; roll; rove; straggle; stray; stroll; traipse; traverse; vagabond; vagabondize; wanderАнтонимический ряд:disconnect; disorder; disturb; intermit; remain -
13 range
диапазон; длина; расстояние; радиус действия; дальность действия; размах; амплитуда; дистанция; дальность; протяженность; предел; решётка; сито; ряд; линия; серия; класс; II ставить в ряд; классифицировать; систематизировать; колебаться в пределах; устанавливать в линию; выравнивать; выпрямлять; откладывать размер- range of application - range of measurement - range of regulation - range of response - range of revolutions - range of sensitiveness - range of sizes - range of speed - range of spring - range of stability - range of stress - range of temperatures - range of use - range of visibility - range of vision - aerodynamic range - at close range - at long range - day visibility range - deceleration range - dynamic range - effective range - elastic range - elasto-plastic range - excursion range - free transmission range - frequency range - fusion range - indicating range - limiting range - maximum range - line-of-sight range - load range shifting - long range mapping - narrow-range combine - power range - practical range - rated range - safe range - scale range - temperature range - timing range - thermal range - transfer gears range - vehicle range test - visibility range - working range -
14 temperature range
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15 effects of the electric arc inside switchgear and controlgear assemblу
- действие электрической дуги, возникающей внутри НКУ распределения и управления
действие электрической дуги, возникающей внутри НКУ распределения и управления
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[Интент]Параллельные тексты EN-RU
Effects of the electric arc inside switchgear and controlgear assemblies
In the proximity of the main boards, i.e. in the proximity of big electrical machines, such as transformers or generators, the short-circuit power is high and consequently also the energy associated with the electrical arc due to a fault is high.
Without going into complex mathematical descriptions of this phenomenon, the first instants of arc formation inside a cubicle can be schematized in 4 phases:
1. compression phase: in this phase the volume of the air where the arc develops is overheated owing to the continuous release of energy; due to convection and radiation the remaining volume of air inside the cubicle warms up; initially there are temperature and pressure values different from one zone to another;
2. expansion phase: from the first instants of internal pressure increase a hole is formed through which the overheated air begins to go out. In this phase the pressure reaches its maximum value and starts to decrease owing to the release of hot air;
3. emission phase: in this phase, due to the continuous contribution of energy by the arc, nearly all the air is forced out under a soft and almost constant overpressure;
4. thermal phase: after the expulsion of the air, the temperature inside the switchgear reaches almost that of the electrical arc, thus beginning this final phase which lasts till the arc is quenched, when all the metals and the insulating materials coming into contact undergo erosion with production of gases, fumes and molten material particles.
Should the electrical arc occur in open configurations, some of the described phases could not be present or could have less effect; however, there shall be a pressure wave and a rise in the temperature of the zones surrounding the arc.
Being in the proximity of an electrical arc is quite dangerous; here are some data to understand how dangerous it is:
• pressure: at a distance of 60 cm from an electrical arc associated with a 20 kA arcing fault a person can be subject to a force of 225 kg; moreover, the sudden pressure wave may cause permanent injuries to the eardrum;
• arc temperatures: about 7000-8000 °C;
• sound: electrical arc sound levels can reach 160 db, a shotgun blast only 130 db.
[ABB]Действие электрической дуги, возникающей внутри НКУ распределения и управления
Короткое замыкание вблизи больших силовых устройств, таких как трансформаторы или генераторы имеет очень большую мощность. Поэтому энергия электрической дуги, возникшей в результате короткого замыкания, очень большая.
Не вдаваясь в сложное математическое описание данного явления, можно сказать, что первые мгновения формирования дуги внутри шкафа можно упрощенно разделить на четыре этапа:
1. Этап сжатия: на этом этапе объем воздуха, в котором происходит зарождение дуги перегревается вследствие непрерывного высвобождения энергии. За счет конвекции и излучения оставшийся объем воздуха внутри шкафа нагревается. На этом начальном этапе значения температуры и давления воздуха в разных зонах НКУ разные.
2. Этап расширения: с первых мгновений внутреннее давление создает канал, через который начинается движение перегретого воздуха. На этом этапе давление достигает своего максимального значения, после чего начинает уменьшаться вследствие выхода горячего воздуха.
3. Этап эмиссии: на этом этапе вследствие непрерывного пополнения энергией дуги почти весь воздух выталкивается под действием мягкого и почти постоянного избыточного давления.
4. Термический этап: после выхлопа воздуха температура внутри НКУ почти достигает температуры электрической дуги. Так начинается заключительный этап, который длится до тех пор, пока дуга не погаснет. При этом все металлические и изоляционные материалы, вступившие в контакт с дугой, оказываются подвергнутыми эрозии с выделением газов, дыма и частиц расплавленного материала.
Если электрическая дуга возникнет в открытом НКУ, то некоторые из описанных этапов могут не присутствовать или могут иметь меньшее воздействие. Тем не менее будет иметь место воздушная волна и подъем температуры вблизи дуги.
Находиться вблизи электрической дуги довольно опасно. Ниже приведены некоторые сведения, помогающие осознать эту опасность:
• давление: На расстоянии 60 см от электрической дуги, вызванной током короткого замыкания 20 кА, человек может подвергнуться воздействию силы 225 кг. Более того, резкая волна давления может нанести тяжелую травму барабанным перепонкам;
• температура дуги: около 7000-8000 °C;
• шумовое воздействие: Уровень шумового воздействия электрической дуги может достигнуть 160 дБ (выстрел из дробовика – 130 дБ).
[Перевод Интент]Тематики
- НКУ (шкафы, пульты,...)
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Англо-русский словарь нормативно-технической терминологии > effects of the electric arc inside switchgear and controlgear assemblу
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