-
1 rond
rond, e1 [ʀɔ̃, ʀɔ̃d]1. adjectiveb. ( = net) round• être rond comme une bille or comme une queue de pelle to be blind drunk (inf)2. masculine nouna. ( = cercle) ring• s'asseoir/danser en rond to sit/dance in a circle• tourner en rond (à pied) to walk round and round ; (en voiture) to drive round in circles ; (enquête, discussion) to go round in circles• il n'a pas le or un rond he hasn't got a penny to his name• ça doit valoir des ronds ! that must be worth a mint! (inf)3. adverb• qu'est-ce qui ne tourne pas rond ? (inf) what's the matter?• ça fait 50 € tout rond it comes to exactly 50 euros* * *
1.
ronde ʀɔ̃, ʀɔ̃d adjectif1) ( en forme de cercle) gén round; [bâtiment] circular2) ( arrondi) gén rounded; [seins] full; [visage] round; [personne] tubbyelle se trouve trop ronde — euph she thinks she's too fat
3) ( net) [nombre] round4) (colloq) ( ivre) drunk
2.
faire des ronds dans l'eau — lit to make ripples in the water
Phrasal Verbs:••être rond en affaires — (colloq) to be honest, to be on the level (colloq)
être rond comme une barrique or une queue de pelle or un petit pois — (colloq) to be blind drunk (colloq)
* * *ʀɔ̃, ʀɔ̃d rond, -e1. adj1) (= sphérique, circulaire) roundLa Terre est ronde. — The earth is round.
Il a les joues rondes. — He has round cheeks.
3) * (= ivre) drunk, tight *Il est complètement rond. — He's completely drunk.
4) (= sans détour)2. nm1) (= cercle) circleElle a dessiné un rond sur le sable. — She drew a circle in the sand.
en rond [s'asseoir, danser] — in a circle, in a ring
Ils se sont assis en rond. — They sat down in a circle.
2) * (= sou)je n'ai plus un rond — I haven't a penny to my name, I'm broke *
3. nf1) [surveillance] patrol2) (= danse) round dance3) MUSIQUE semibreve Grande-Bretagne whole note USAà la ronde (= alentour) — around, (= à chacun) around
Il a passé les photos à la ronde. — He passed the photos around., He passed the photos round. Grande-Bretagne
4. advtourner rond [moteur] — to run smoothly
* * *A adj1 gén [objet, table, trou, chapeau, tête, œil] round; [tube, bâtiment] circular; [plat] round, circular; [écriture, lettres] rounded; [bras, mollet, ventre, cuisse, menton] rounded; [seins] full; [visage] round; [personne] tubby; un petit nez rond a button nose; un bébé tout rond a chubby baby; elle se trouve trop ronde euph she thinks she's too fat;2 ( net) [nombre, chiffre] round; un compte rond a round sum; ça fait trois cents euros tout rond that's three hundred euros exactly; elle a sept ans tout rond she's seven years old exactly;3 ○( ivre) drunk;4 Vin [vin] round.B nm1 ( cercle) circle; tracer un rond to draw a circle; danser en rond to dance (round) in a circle; s'asseoir en rond to sit in a circle ou ring; faire des ronds de fumée to blow smoke rings; faire des ronds dans l'eau lit to make ripples in the water; un rond de lumière a patch of light; ⇒ baver;2 ◑( argent) ils ont des ronds they're rich, they're loaded○; n'avoir plus un rond to be broke○; tu as assez de ronds? have you got enough dough○?; coûter des ronds to cost a bundle○!;3 Culin ( morceau de bœuf) round steak;4 ( tranche) slice.C ronde nf1 Danse, Mus round dance; faire une ronde to make ou form a circle; entrer dans la ronde lit, fig to join the dance;2 ( va-et-vient) la ronde des voitures sur la place de la Concorde/le circuit the cars whirling round Place de la Concorde/the circuit; la ronde des notes de service dans un bureau memos going the rounds in an office; la ronde des saisons the passing of the seasons;3 ( inspection) ( de policiers) patrol; (de soldats, gardiens) watch; faire sa ronde to be on patrol ou watch;5 ( écriture arrondie) roundhand.D à la ronde loc adv1 ( autour) around; toutes les cloches à la ronde sonnaient all the bells were ringing for miles around; on entendait le bruit à trois kilomètres à la ronde you could hear the noise three kilometresGB away;2 ( ici et là) around; offrir des gâteaux à la ronde to pass some cakes around.rond à béton Constr reinforcing bar; rond de jambe Danse rond de jambe; faire des ronds de jambe à qn fig to be overly polite to sb; rond de serviette napkin ring; rond de sorcière fairy ring.être rond en affaires○ to be honest, to be on the level○; ouvrir des yeux ronds to be wide-eyed with astonishment; être rond comme une barrique or queue de pelle or un petit pois to be blind drunk○.( féminin ronde) [rɔ̃, rɔ̃d] adjectiffaire ou ouvrir des yeux ronds to stare in disbeliefde jolies épaules bien rondes well-rounded ou well-turned shoulders5. [chiffre, somme] round————————nom masculinfaire des ronds de fumée to blow ou to make smoke rings2. [anneau] ring3. (familier) [sou]4. DANSE————————adverbe(familier & locution)tourner rond to go well, to run smoothlyqu'est-ce qui ne tourne pas rond? what's the matter?, what's the problem?————————en rond locution adverbiale[se placer, s'asseoir] in a circle[danser] in a ring -
2 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
-
3 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
См. также в других словарях:
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