-
1 under current
-
2 under-current circuit breaker
Макаров: минимальный выключательУниверсальный англо-русский словарь > under-current circuit breaker
-
3 under-current protection
Макаров: минимальная токовая защитаУниверсальный англо-русский словарь > under-current protection
-
4 under current legislation
Общая лексика: (the) по действующему законодательствуУниверсальный англо-русский словарь > under current legislation
-
5 over-and-under current relay
Англо-русский металлургический словарь > over-and-under current relay
-
6 over-and-under current relay
Металлургия: реле увеличения и уменьшения токаУниверсальный англо-русский словарь > over-and-under current relay
-
7 an offense under current law
Politics english-russian dictionary > an offense under current law
-
8 extent permitted under current US and Russian laws
в размере, установленном действующими федеральными законами США и РоссииEnglish-Russian dictionary of program "Mir-Shuttle" > extent permitted under current US and Russian laws
-
9 operate under current cutoff
English-Russian dictionary of telecommunications > operate under current cutoff
-
10 current
1) течение2) струя3) ток (электр.)4) текущий -
11 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
—
[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
-
12 current-limiting reactor
токоограничивающий реактор
-
[ ГОСТ 18624-73]EN
current-limiting reactor
reactor connected in series in a power system to limit the current under system fault conditions
[IEC 60076-6, ed. 1.0 (2007-12)]
series reactor
a reactor intended for series connection in a network, either for limiting the current under fault conditions or for load-sharing in parallel circuits
[IEV ref 421-01-02]FR
bobine d’inductance de limitation de courant
bobine d’inductance connectée en série dans un réseau pour limiter le courant en cas de conditions de défaut dans le réseau
[IEC 60076-6, ed. 1.0 (2007-12)]
(bobine d')inductance série
bobine d'inductance destinée à être placée en série dans un réseau, soit pour limiter le courant dans le cas de défaut dans le réseau, soit pour répartir la charge dans des circuits en parallèle
[IEV ref 421-01-02]Тематики
Классификация
>>>Обобщающие термины
EN
FR
- bobine d’inductance de limitation de courant
Англо-русский словарь нормативно-технической терминологии > current-limiting reactor
-
13 current maximeter
максимальное зарегистрированное значение тока
-
[Интент]Параллельные тексты EN-RU
Current maximeter - Maximum value of the instantaneous time current (refreshed every 500 ms) since trip unit installation or last reset.
[Schneider Electric]Максимальное зарегистрированное значение тока - Максимальное значение мгновенного тока (обновляется каждые 500 мс), с момента установки расцепителя или с момента его последнего обнуления.
[Перевод Интент]The maximeter does not operate for currents under 0.2 x In.
[Schneider Electric]Максимальные значения не регистрируются при токах менее 0,2 x In.
[Перевод Интент]
Тематики
EN
Англо-русский словарь нормативно-технической терминологии > current maximeter
-
14 current cut-out
токовый расцепитель 1)
-
[IEV number 442-01-44]EN
current cut-out
a current sensing device intended to switch-off automatically under abnormal operating condition and which has no provision for adjustment by the user
[IEV number 442-01-44]FR
limiteur de courant
dispositif sensible au courant, destiné à interrompre automatiquement un circuit dans des conditions de fonctionnement anormal, et qui ne peut être réglé par l'usager
[IEV number 442-01-44]1) Должно быть расцепитель тока
[Интент]EN
DE
FR
Англо-русский словарь нормативно-технической терминологии > current cut-out
-
15 current trip coil
токовый расцепитель 1)
-
[IEV number 442-01-44]EN
current cut-out
a current sensing device intended to switch-off automatically under abnormal operating condition and which has no provision for adjustment by the user
[IEV number 442-01-44]FR
limiteur de courant
dispositif sensible au courant, destiné à interrompre automatiquement un circuit dans des conditions de fonctionnement anormal, et qui ne peut être réglé par l'usager
[IEV number 442-01-44]1) Должно быть расцепитель тока
[Интент]EN
DE
FR
Англо-русский словарь нормативно-технической терминологии > current trip coil
-
16 current directory
English-Russian dictionary of Information technology > current directory
-
17 under (the) current legislation
Общая лексика: по действующему законодательствуУниверсальный англо-русский словарь > under (the) current legislation
-
18 minimum current release
минимальный расцепитель тока
Расцепитель, автоматически срабатывающий, когда протекающий через него ток опускается ниже заданного уровня.
[ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]EN
under-current relay or release
measuring relay or release which operates automatically when the current through it is reduced below a predetermined value.
[IEC 60947-4-1, ed. 3.0 (2009-09)]FR
relais ou déclencheur à minimum de courant
relais de mesure ou déclencheur qui fonctionne automatiquement lorsque le courant qui le traverse devient inférieur à une valeur prédéterminée.
[IEC 60947-4-1, ed. 3.0 (2009-09)]
Недопустимые, нерекомендуемые
Тематики
- выключатель автоматический
- расцепитель, тепловое реле
Классификация
>>>Действия
EN
FR
Англо-русский словарь нормативно-технической терминологии > minimum current release
-
19 minimum-current release
минимальный расцепитель тока
Расцепитель, автоматически срабатывающий, когда протекающий через него ток опускается ниже заданного уровня.
[ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]EN
under-current relay or release
measuring relay or release which operates automatically when the current through it is reduced below a predetermined value.
[IEC 60947-4-1, ed. 3.0 (2009-09)]FR
relais ou déclencheur à minimum de courant
relais de mesure ou déclencheur qui fonctionne automatiquement lorsque le courant qui le traverse devient inférieur à une valeur prédéterminée.
[IEC 60947-4-1, ed. 3.0 (2009-09)]
Недопустимые, нерекомендуемые
Тематики
- выключатель автоматический
- расцепитель, тепловое реле
Классификация
>>>Действия
EN
FR
Англо-русский словарь нормативно-технической терминологии > minimum-current release
-
20 continuous current-carrying capacity
длительная пропускная способность по току
—
[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
(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
Англо-русский словарь нормативно-технической терминологии > continuous current-carrying capacity
См. также в других словарях:
Current River (Missouri) — Current River River Country United States States Missour … Wikipedia
current monthly income — A bankruptcy filer s total gross income averaged over the six month period immediately preceding the bankruptcy filing. The debtor s current monthly income is used to determine whether the individual debtor qualifies for a Chapter 7 or a Chapter… … Glossary of Bankruptcy
Current TV — s official logo Launched August 1, 2005 Owned by Current Media, Inc. Slogan Your World. View. Headquarters San Francisco, California Website … Wikipedia
Current limiting — is the practice in electrical or electronic circuits of imposing an upper limit on the current that may be delivered to a load with the purpose of protecting the circuit generating or transmitting the current from harmful effects due to a short… … Wikipedia
Current — Cur rent (k?r rent), a. [OE. currant, OF. curant, corant, p. pr. of curre, corre, F. courre, courir, to run, from L. currere; perh. akin to E. horse. Cf. {Course}, {Concur}, {Courant}, {Coranto}.] 1. Running or moving rapidly. [Archaic] [1913… … The Collaborative International Dictionary of English
Current money — Current Cur rent (k?r rent), a. [OE. currant, OF. curant, corant, p. pr. of curre, corre, F. courre, courir, to run, from L. currere; perh. akin to E. horse. Cf. {Course}, {Concur}, {Courant}, {Coranto}.] 1. Running or moving rapidly. [Archaic]… … The Collaborative International Dictionary of English
Under Secretary of State for Economic, Business, and Agricultural Affairs — Under Secretary for Economic, Business, and Agricultural Affairs is a undersecretary position within the United States Department of State. The Under Secretary for Economic, Business, and Agricultural Affairs serves as senior economic advisor at… … Wikipedia
Under Secretary of State for Management — Under Secretary for Management is a position within the American Department of State that serves as principal adviser to the Secretary of State and Deputy Secretary of State on matters relating to the allocation and use of Department of State… … Wikipedia
Under the Banner of Heaven — Author(s) … Wikipedia
Current Dental Terminology — (CDT) is a code set with descriptive terms developed and updated by the American Dental Association (ADA) for reporting dental services and procedures to dental benefits plans. [1][2][3] Many of the codes are published by CMS as HCPCS D codes… … Wikipedia
Current research in evolutionary biology — covers diverse topics, as should be expected given the centrality of evolution to understanding biology. Modern evolutionary biology incorporates ideas from diverse areas of science, such as molecular genetics and even computer science. First,… … Wikipedia
