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1 power line communication
Cables: PLCУниверсальный русско-английский словарь > power line communication
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2 power line communications
Cables: PLCУниверсальный русско-английский словарь > power line communications
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3 optical power ground wire
Cables: OPGWУниверсальный русско-английский словарь > optical power ground wire
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4 кабель силовой цепи
кабель силовой цепи
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[Интент]Параллельные тексты EN-RU
Power cables are used for interconnection between bus bar, step protection, switches, reactors and capacitors.
[Schneider Electric]Кабели силовой цепи соединяют между собой сборные шины, устройства защиты ступеней компенсации, выключатели, дроссели и конденсаторы.
[Перевод Интент]
Тематики
- кабели, провода...
EN
Русско-английский словарь нормативно-технической терминологии > кабель силовой цепи
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5 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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6 ввод кабелей питания сверху и снизу
Русско-английский словарь нормативно-технической терминологии > ввод кабелей питания сверху и снизу
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7 коммуникации
1) General subject: communications, routes of communication2) Military: lane of communications, lines of communication3) Engineering: distribution lines, pipelines, supply lines4) Construction: services5) Oil: communications (подъездные пути), distribution pipelines (трубопроводы), supply pipelines (трубопроводы)6) Network technologies: comm, communication7) Chemical weapons: communications (связь), utilities (инженерные)8) Makarov: communication lines, lines, service lines9) oil&gas: power cables, telephone cables or other services10) Logistics: ways of communication11) Politico-military term: communication (as in "lines of..." or "communications one")12) Foreign Ministry: lines of communications -
8 фазный ток электродвигателя
фазный ток электродвигателя
-Параллельные тексты EN-RU
The LTM R controller includes internal current transformers for measuring the motor load phase current directly from the motor load power cables or from secondaries of external current transformers.
[Schneider Electric]В контроллере LTM R установлены трансформаторы, предназначенные для измерения фазных токов, протекающих через обмотки электродвигателя. Измерение осуществляется непосредственно на проводниках, идущих к электродвигателю. Для этих же целей могут применяться внешние трансформаторы тока.
[Перевод Интент]Components such as external motor load current transformers and ground current transformers add additional range to the system.
[Schneider Electric]Применение дополнительных устройств, таких как внешние трансформаторы измерения фазных токов электродвигателя и трансформаторы измерения дифференциального тока, позволяет расширить диапазон применения системы управления электродвигателем.
[Перевод Интент]
Тематики
EN
Русско-английский словарь нормативно-технической терминологии > фазный ток электродвигателя
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9 технология передачи информации по электрическим сетям
Универсальный русско-английский словарь > технология передачи информации по электрическим сетям
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10 волоконно-оптический кабель, встроенный в грозозащитный трос
Cables: optical power ground wireУниверсальный русско-английский словарь > волоконно-оптический кабель, встроенный в грозозащитный трос
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11 кабель для гермозоны атомных станций
Универсальный русско-английский словарь > кабель для гермозоны атомных станций
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12 оптический кабель, встроенный в грозозащитный трос
Cables: optical power ground wireУниверсальный русско-английский словарь > оптический кабель, встроенный в грозозащитный трос
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13 реверс потока энергии
Cables: reversal of power flowУниверсальный русско-английский словарь > реверс потока энергии
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14 шумовая эквивалентная мощность
Cables: noise equivalent powerУниверсальный русско-английский словарь > шумовая эквивалентная мощность
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15 экономия мощности
Cables: saving of power -
16 экспоненциальный профиль показателя преломления
Cables: power-law index profileУниверсальный русско-английский словарь > экспоненциальный профиль показателя преломления
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17 электрическая выходная мощность
Cables: power outputУниверсальный русско-английский словарь > электрическая выходная мощность
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18 электроснабжение собственных нужд электростанции
Cables: auxiliary power supplyУниверсальный русско-английский словарь > электроснабжение собственных нужд электростанции
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19 энергомашиностроительная промышленность
Cables: power plant industryУниверсальный русско-английский словарь > энергомашиностроительная промышленность
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20 мощность
1) General subject: agripower, capacity, duty, energy, mightiness, power, rating, vigour, width (жилы или пласта), yield, output, outturn, multiplicity (определяет какое количество экземпляров одного класса ассоциировано с одним экземпляром другого класса. В общем случае возможные значения мощности задаются множеством положительных целочисленных значений)2) Geology: competence, competency4) Aviation: rower7) American: soup8) Sports: muscular power9) Military: horsepower (в лошадиных силах), power, yield (ядерного боеприпаса)10) Engineering: breadth, capability, capacity (производственная), depth (горных пород), discharge rate, marked capacity, power (физическая величина), thickness (горных пород), volume, watt (в ваттах), wattage (в ваттах), watts11) Agriculture: (номинальная) capacity, thickness (почвы)12) Construction: depth (пласта), dump power, horse-power (в л. с.), horsepower rating, load cantilevering, work, delivery13) Mathematics: cardinal number, cardinality measure, order (группы), potency14) Railway term: belt power, capacity value, power rating15) Law: might16) Economy: rate of work, working efficiency17) Automobile industry: indicated efficiency, power output19) Diplomatic term: devote energies, yield (атомного заряда)21) Telecommunications: ability22) Information technology: cardinality (множества), strength23) Oil: horsepower, size, thickness24) Astronautics: rating data25) Power engineering: (электрическая) capacity26) Business: working capacity29) Automation: horsepower capacity, output (на выходе), power capacity, source density31) Cables: capacity (производственная), power (физическая величина)33) Makarov: capacity (номинальная), competence (потока), depth (напр. пласта, облачности), duty (полезная работа машины), power level, production, range (телескопа и т.п.), thickness (напр. пласта), thickness (напр., пласта), work per time35) Electrochemistry: electrical energy36) SAP.tech. cap.38) Cement: power efficiency39) General subject: power (критерия)
См. также в других словарях:
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