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1 all-aluminum alloy conductor
Electrical engineering: AAACУниверсальный русско-английский словарь > all-aluminum alloy conductor
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2 all-aluminum conductor
Универсальный русско-английский словарь > all-aluminum conductor
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3 алюминиевый провод
алюминиевый провод
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[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва]Тематики
- электротехника, основные понятия
EN
Русско-английский словарь нормативно-технической терминологии > алюминиевый провод
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4 провод из алюминиевого сплава
провод из алюминиевого сплава
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[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
Русско-английский словарь нормативно-технической терминологии > провод из алюминиевого сплава
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5 провод из алюминиевого сплава
Русско-английский словарь по электроэнергетике > провод из алюминиевого сплава
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6 цельноалюминиевый проводник
Русско-английский словарь по машиностроению > цельноалюминиевый проводник
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7 алюминиевый провод
1) Engineering: all-aluminum conductor, aluminum conductor2) Automobile industry: aluminum wire3) Cables: aluminium wireУниверсальный русско-английский словарь > алюминиевый провод
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8 провод из алюминиевого сплава
1) Engineering: aluminum alloy conductor2) Electrical engineering: all aluminum alloy conductorУниверсальный русско-английский словарь > провод из алюминиевого сплава
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9 выполненный
1) fulfilled
2) realized
выполненный целиком из алюминия — all-aluminum
световод выполненный методом обратной диффузии — outdiffusion waveguide
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10 целиком
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11 полностью алюминиевый блок
Automobile industry: all aluminum unit (двигателя)Универсальный русско-английский словарь > полностью алюминиевый блок
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12 цельно-алюминиевый проводник
Engineering: all-aluminum conductorУниверсальный русско-английский словарь > цельно-алюминиевый проводник
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13 цельноалюминиевая дверь
Construction: all-aluminum doorУниверсальный русско-английский словарь > цельноалюминиевая дверь
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14 цельноалюминиевый
Construction: all-aluminum -
15 цельноалюминиевый проводник
Metallurgy: all-aluminum conductorУниверсальный русско-английский словарь > цельноалюминиевый проводник
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16 длительный допустимый ток
(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-английский словарь нормативно-технической терминологии > длительный допустимый ток
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17 аналогично
•In a similar (or like) manner (or Along similar lines), design equations may be derived from the general formula.
•This type of door can be folded in a manner like the operation of the camera bellows.
•The device would operate in much the same way (or manner, or fashion) as (or similarly, or analogously, to) a core array.
•The retina cells transform the light image into a spatial pattern of electrical signals, much as a television camera does.
•Gases behave similarly (or in a similar way) in all directions.
•The components of strain are specified in a similar way to the stresses.
* * *Аналогично -- similarly, in a similar manner to, in a manner identical to that for; reciprocally (соответственно)Oxygen reacting with the rolling-element surfaces can act in a similar manner to the antiwear additive.Two of plexiglass pieces were bevelled in a manner identical to that for the aluminum walls of the test section.Reciprocally, implementation of these systems has been a most challenging test for programming languages.Русско-английский научно-технический словарь переводчика > аналогично
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18 вещество
см. материал* * *Вещёство -- matter (в общем смысле); substance (химическое); compound, composition, material (объект изобретения)The character of the fly ash is related to the thermal changes which the mineral matter undergoes during the combustion of coal.The percent by weight of all the substances (constituents) excluding that of aluminum is negligible.This compound is refluxed with formic acid for a period of time of the order of 2 hours.Русско-английский научно-технический словарь переводчика > вещество
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19 пересекать(ся)
Пересекать(ся) - to cut; to traverse (двигаться в поперечном направлении); to cross, to intersect (о кривых)A is the point where the curve cuts the vertical axis.These channels were machined into the aluminum plate, traversing the full breadth of the enclosure seven times.The larger the L/d, the more rapidly do the curves drop off, and this causes all curves to ultimately cross.As hot furnace flue gas crosses the first rows of tubes in the boiler tank, a considerable amount of steam is generated in this area.Русско-английский научно-технический словарь переводчика > пересекать(ся)
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20 дисковая катушечная обмотка
дисковая катушечная обмотка
Катушечная обмотка, собранная из отдельно намотанных катушек, выполненных в виде плоских спиралей из одного провода или нескольких параллельных проводов
[ ГОСТ 16110-82]Параллельные тексты EN-RU
Aluminum or copper foil disk in high voltage winding.
[ABB]Обмотка высшего напряжения дискового типа из алюминиевой или медной полосы.
[Перевод Интент]
Medium voltage, dry-type transformers may have their high voltage windings constructed using either the layer winding technique or the disc winding technique.
In the disc winding, the required number of turns are wound in a number of horizontal discs spaced along the axial length of the coil. The conductor is usually rectangular in cross-section and the turns are wound in a radial direction, one on top of the other i.e. one turn per layer, until the required number of turns per disc has been wound. The conductor is then moved to the next disc and the process repeated until all turns have been wound. There is an air space, or duct, between each pair of discs. The disc winding requires insulation only on the conductor itself, no additional insulation is required between layers, as in the layer winding.
Disc windingThe disc wound high voltage winding is usually wound in two halves, in order that the required voltage adjustment taps may be positioned at the electrical center of the winding. In this way the magnetic, or effective length of the winding is maintained, irrespective of which tap is used, and therefore the magnetic balance between primary and secondary windings is always close to its optimum. This is essential to maintain the short circuit strength of the winding, and reduces the axial electromagnetic forces which arise when the windings are not perfectly balanced.
Transformer with disc wound coils[Dry-Type disc wound transformers in medium voltage applications. Derek R. Foster I.Eng. MIIE]
Computer aided winding process
Рис. ABB
Тематики
Обобщающие термины
Синонимы
EN
Русско-английский словарь нормативно-технической терминологии > дисковая катушечная обмотка
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