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1 direct-current resistance
English-Russian big polytechnic dictionary > direct-current resistance
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2 direct-current resistance
English-Russian dictionary of Information technology > direct-current resistance
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3 direct-current resistance
The English-Russian dictionary general scientific > direct-current resistance
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4 direct-current resistance
Большой англо-русский и русско-английский словарь > direct-current resistance
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5 direct-current resistance
Англо-русский технический словарь > direct-current resistance
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6 direct-current resistance
2) Электроника: сопротивление постоянному токуУниверсальный англо-русский словарь > direct-current resistance
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7 direct-current resistance
English-Russian dictionary of terminology cable technology > direct-current resistance
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8 direct-current resistance
English-Russian dictionary of modern telecommunications > direct-current resistance
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9 direct-current resistance
English-Russian scientific dictionary > direct-current resistance
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10 direct-current resistance of coil
электрическое сопротивление постоянному току
По ГОСТ 19880-74
[ ГОСТ 20718-75]
электрическое сопротивление постоянному току
Скалярная величина, равная отношению постоянного электрического напряжения между выводами пассивного двухполюсника к постоянному электрическому току в нем.
[ ГОСТ Р 52002-2003]Тематики
- катушки индуктивности аппаратуры связи
- электротехника, основные понятия
EN
FR
Англо-русский словарь нормативно-технической терминологии > direct-current resistance of coil
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11 direct-current
1) Электроника: постоянного тока2) Вычислительная техника: потенциального типа, работающий на постоянном токе3) Макаров: (d.c. resistance) сопротивление постоянному току -
12 direct-current (d.c. resistance)
Макаров: сопротивление постоянному токуУниверсальный англо-русский словарь > direct-current (d.c. resistance)
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13 direct-current plate resistance
Универсальный англо-русский словарь > direct-current plate resistance
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14 resistance to direct current
Метрология: сопротивление постоянному токуУниверсальный англо-русский словарь > resistance to direct current
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15 d.c. resistance (direct-current)
Макаров: сопротивление постоянному токуУниверсальный англо-русский словарь > d.c. resistance (direct-current)
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16 resistance
1) сопротивление
2) воспротивление
3) сопротивляемость
4) стойкость
5) токопроводный
6) <electr.> сопротивление активное
7) сопротивление омическое
8) устойчивость
9) резистанс
10) резистивный
– abrasion resistance
– acid resistance
– acoustic resistance
– adjusting resistance
– alternating-current resistance
– anode resistance
– antenna resistance
– atmosphere resistance
– attrition resistance
– back resistance
– ballast resistance
– bare-hull resistance
– cathode resistance
– channel resistance
– coating resistance
– collector resistance
– constant resistance
– contact resistance
– corrosion resistance
– creep resistance
– cubic resistance
– damping resistance
– dark resistance
– dead resistance
– diffusion resistance
– direct-current resistance
– discharge resistance
– distributed resistance
– drain resistance
– draught resistance
– exhaust resistance
– fatigue resistance
– field resistance
– fixed resistance
– form resistance
– friction resistance
– fuel resistance
– gate resistance
– glazing resistance
– go-and-return resistance
– grid resistance
– grounding resistance
– head resistance
– heat resistance
– heat-ageing resistance
– high-frequency resistance
– impact resistance
– incremental resistance
– input resistance
– insulation resistance
– interlamination resistance
– internal resistance
– junction resistance
– leak resistance
– leakage resistance
– light-ageing resistance
– lumped resistance
– mold resistance
– moment of resistance
– momentum resistance
– non-linear resistance
– ohmic resistance
– output resistance
– plate resistance
– plate-target resistance
– pore-diffusion resistance
– pressure resistance
– residuary resistance
– resistance balance
– resistance box
– resistance bridge
– resistance coil
– resistance coupling
– resistance heating
– resistance network
– resistance paper
– resistance pyrometer
– resistance to bending
– resistance to compression
– resistance to enzymes
– resistance to heat
– resistance to impact
– resistance to peeling
– resistance to wear
– resistance transducer
– resistance weld
– resistance welding
– resonance resistance
– roughness resistance
– saturation resistance
– series resistance
– short-circuit resistance
– shunt resistance
– slip resistance
– source resistance
– spray resistance
– standard resistance
– surface resistance
– thermal resistance
– total resistance
– tractive resistance
– variable resistance
– viscous resistance
– wave resistance
calculated line of resistance — расчетная линия сопротивления
diode conduction resistance — сопротивление диодного детектора
eddy-making resistance coefficient — коэффициент вихревого сопротивления
gated resistance network — управляемое цифровое сопротивление
line of least resistance — <phys.> линия наименьшего сопротивления
plug-type resistance box — штепсельный магазин сопротивлений
resistance to lateral bending — сопротивление продольному изгибу
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17 résistance en courant continu de bobine
электрическое сопротивление постоянному току
По ГОСТ 19880-74
[ ГОСТ 20718-75]
электрическое сопротивление постоянному току
Скалярная величина, равная отношению постоянного электрического напряжения между выводами пассивного двухполюсника к постоянному электрическому току в нем.
[ ГОСТ Р 52002-2003]Тематики
- катушки индуктивности аппаратуры связи
- электротехника, основные понятия
EN
FR
67. Электрическое сопротивление постоянному току
Е. Direct-current resistance of coil
F. Résistance en courant continu de bobine
Источник: ГОСТ 20718-75: Катушки индуктивности аппаратуры связи. Термины и определения оригинал документа
Франко-русский словарь нормативно-технической терминологии > résistance en courant continu de bobine
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18 resistance
2) электр. активное [омическое] сопротивление3) сопротивляемость; стойкость•resistance to corrosion — коррозионная стойкость, устойчивость против коррозии
resistance to fracture — сопротивление излому, сопротивление разрушению
resistance to heat — теплостойкость; жароупорность, жаропрочность
resistance to shock — сопротивление удару, ударопрочность
resistance to wear — прочность на износ, износоустойчивость
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19 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
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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
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
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20 direct resistance furnace
English-Russian big polytechnic dictionary > direct resistance furnace
См. также в других словарях:
direct-current resistance — nuolatinės srovės varža statusas T sritis fizika atitikmenys: angl. direct current resistance vok. Gleichstromwiderstand, m rus. сопротивление постоянному току, n pranc. résistance en courant continu, f … Fizikos terminų žodynas
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résistance en courant continu — nuolatinės srovės varža statusas T sritis fizika atitikmenys: angl. direct current resistance vok. Gleichstromwiderstand, m rus. сопротивление постоянному току, n pranc. résistance en courant continu, f … Fizikos terminų žodynas
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