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1 regime of flow
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2 regime
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3 flow
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4 flow characteristics
régime d’écoulement mDictionary of Engineering, architecture and construction > flow characteristics
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5 steady flow
écoulement permanent m, régime permanent m, régime permanent (liquide) mDictionary of Engineering, architecture and construction > steady flow
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6 расчет гидрологического потока
расчет гидрологического потока
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
hydrologic flow
The characteristic behaviour and the total quantity of water involved in a drainage basin, determined by measuring such quantities as rainfall, surface and subsurface storage and flow, and evapotranspiration. (Source: BJGEO)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > расчет гидрологического потока
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7 дебит реки
дебит реки
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
discharge regime
The rate of flow of a river at a particular moment in time, related to its volume and its velocity. (Source: WHIT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-французский словарь нормативно-технической терминологии > дебит реки
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8 water
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9 air
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10 glacier
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11 natural
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12 regulate
regulate ['regjʊleɪt]∎ the machine is regulated by a lever la machine se règle à l'aide d'un levier∎ he followed a well regulated diet il suivit un régime équilibré;∎ rules regulating the use of additives les réglementations qui régissent l'emploi des additifs -
13 trickle
trickle ['trɪkəl]∎ rainwater trickled from the gutters un mince filet d'eau de pluie s'échappait des gouttières;∎ I felt the blood trickle slowly down my leg je sentis le sang couler doucement le long de ma jambe;∎ water trickled down the window pane un filet d'eau coulait ou dégoulinait le long de la vitre;∎ tears trickled down his face les larmes coulaient ou dégoulinaient sur son visage∎ information began to trickle out from behind enemy lines les informations commencèrent à filtrer depuis l'arrière des lignes ennemies;∎ news is beginning to trickle through or out from the devastated area on commence à recevoir peu à peu des nouvelles de la région sinistrée;∎ cars began to trickle over the border la circulation a repris progressivement à la frontière;∎ the ball trickled into the goal le ballon roula tranquillement dans les buts∎ he trickled a few drops of milk into the flour il a versé quelques gouttes de lait dans la farine;∎ she trickled some oil out of the can elle a versé un peu d'huile de la boîte(b) (sand, salt) faire glisser ou couler;∎ to trickle sand through one's fingers faire glisser ou couler du sable entre ses doigts3 noun∎ the flow from the spring dwindled to a trickle la source ne laissait plus échapper qu'un mince filet d'eau;∎ the trickle of lava soon became a torrent le filet de lave se transforma bientôt en torrent;∎ there was only a trickle of water from the tap un maigre filet d'eau coulait du robinet∎ a trickle of applications began to come in les candidatures commencèrent à arriver au compte-gouttes;∎ there was only a trickle of visitors il n'y avait que quelques rares visiteurs, les visiteurs étaient rares►► trickle charger chargeur m à régime lent∎ the water trickled away down the plughole l'eau s'écoulait lentement dans le trou de l'évier(b) figurative (money, savings) disparaître petit à petit; (crowd) se disperser petit à petit; (people) s'en aller progressivement(b) (spectators) entrer par petits groupes∎ offers of help began to trickle in quelques offres d'aide commençaient à arriver;∎ information on the disaster only trickled in at first au début les informations sur le désastre arrivaient au compte-gouttes -
14 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
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