-
1 printed apparatus
English-Russian dictionary of Information technology > printed apparatus
-
2 printed apparatus
Телекоммуникации: аппаратура на печатных схемах -
3 printed apparatus
English-Russian dictionary of modern telecommunications > printed apparatus
-
4 printed apparatus
English-Russian dictionary of microelectronics > printed apparatus
-
5 apparatus
1. n прибор, инструмент; аппарат2. n аппаратура3. n машина, механизм4. n физиол. система органов5. n государственная машина6. n аппарат7. n справочный аппаратcritical apparatus, apparatus criticus — справочный критический материал
8. n снарядfixed apparatus — закрепил снаряд; закрепленный снаряд
Синонимический ряд:1. device (noun) appliance; contraption; contrivance; device; gadget; gizmo; machine; mechanism; tool2. equipment (noun) accouterments; equipment; gear; habiliments; implements; machinery; material; materials; materiel; outfit; paraphernalia; rig; tackle; tackling; turnout -
6 sheet
1. лист; сфальцованный лист2. печатный листsheet pan — форма — лист
3. оттискproof sheet — корректурный оттиск, корректура
4. газета5. таблица; ведомость6. листовая бумага7. книга; брошюра8. прокладывать листыin sheets — в несфальцованных листах; в форме несброшюрованных листов
9. объявление, анонсbacking sheet — лист-основа, подложка
bar sheet — полоса, отделяемая от ленты при её продольной разрезке
base sheet — основной лист, основной оригинал
10. газета большого форматаsheet and half post — формат печатной бумаги,5Х59,6 см
11. резинотканевая пластина12. широкий лист13. широкая полосаbarred sheet — полоса, отделяемая от ленты при ее продольной разрезке
14. плакат15. формат листа 2cardboard sheet — картонный лист, лист картона
charged sheet — лист, несущий электростатический заряд
continuous form sheets — бесконечные формуляры; канцелярские формы, отпечатанные на ленте
copy sheet — лист копировального материала, лист для копирования
cork sheet — пробковый лист, лист пробкового полотна
cover sheet — настил, прокладка
16. обрезанный лист17. нарезанные листыcutting sheet — пластмассовый лист, на котором производят корректуру фотонаборной плёнки с помощью скальпеля
18. первый приправочный лист19. лист декеляdiffusion sheet — матовое стекло, светорассеивающая пластина
20. затяжной лист декеляsheet buckling force — сила, необходимая для выгибания листа
21. лист для переноса изображения сухим способом22. формная пластина, обрабатываемая сухим способом23. электрофотографический листовой материал24. электрофотографическая копияelectrophotosensitive copy sheet — электросветочувствительный копировальный лист, лист фотополупроводникового копировального материала
fanned-out sheets — листы, уложенные с роспуском; распущенные листы
final support sheet — лист, используемый для изготовления копии
form sheet — формуляр; бланк; канцелярская форма
free sheet — лист бумаги, не содержащей древесной массы
freshly printed sheet — свежезапечатанный лист, свежеотпечатанный оттиск; сырой оттиск
25. лист тонкой бумаги, лист бумаги, приклеиваемый к полю иллюстрации26. затяжной лист; верхний листink sheet — лист, используемый в качестве резервуара краски
sheet misfeed — пропуск в подаче листа, неподача листа
27. тонкий приправочный лист28. приправочный лист с поверхностным покрытиемmisregistered sheet — лист, отпечатанный без приводки
29. лист, выведенный на приёмкуsheet pick-up feeder — раскладчик — питатель листов
sheet assembly — комплект листов; многослойный лист
30. готовый оттиск на приёмке31. контрольный оттиск32. монтажный лист33. макетleveler sheet — лист, удаляемый из декеля при введении приправочного листа
litho-printed sheet — лист, запечатанный офсетным способом
34. формная пластина35. листовой оригинал для копирования36. неправильно выровненный листprogram sheet — программный бланк; лист программы
37. лист, отпечатанный без приводкиmissed sheet — пропущенный лист; неправильно поданный лист
38. листовка39. информационный листокOK sheet — подписанный к печатанию оттиск, подписной лист; оттиск хорошего качества
40. лист, подкладываемый под печатную форму41. упаковочная тканьperfected sheet — лист, запечатанный с двух сторон
plastic sheet — лист пластмассы; плёнка
press sheet — печатный лист, оттиск
print sheet — копировальный материал; лист, на котором изготавливается копия
printable sheet — лист, пригодный для печатания
printed sheet — печатный лист; запечатанный лист, оттиск
42. корректурный оттиск, гранка43. формуляр44. инвентарная ведомостьcost sheet — калькуляционная ведомость, смета
45. листы для записиrecording sheet — лист, на котором изготавливается копия; лист, используемый для записи информации
register sheet — приводочный лист, лист для контроля приводки
reverse buckle sheet — лист, выгибаемый реверсивными фрикционными роликами
roller-coated sheet — лист со слоем, накатанным валиком
setoff sheet — прокладочный лист ; макулатурный лист
shrink-control backing sheet — малоусадочная основа; подложка с малой деформацией
slush sheet — журнал, печатающий сентиментальные рассказы
stackable sheets — оттиски, готовые для укладки в стопу
stacked sheets — листы, уложенные в стопу
straight sheet — лента, движущаяся после продольной разрезки в том же направлении
46. лист, используемый для изготовления копии47. лист-основа, подложка48. верхний лист49. верхний лист пачкиoverfeed sheet — лист, поданный с опережением
50. формная пластина для конторских множительных машин51. съёмный переводной лист52. пробный оттиск -
7 delivery
1. приёмно-выводное устройство2. вывод3. приёмка4. доставка, разноскаstop delivery — приостановить сдачу; приостановить доставку
delay in delivery — задержка в доставке; задержка в сдаче
5. нагнетание6. производительностьdelivery volume — объем подачи; производительность
7. продукция8. автоматическое приёмно-выводное устройство9. автоматический вывод листа10. приёмный цепной транспортёр11. цепное листовыводное устройствоdouble delivery — сдвоенное приёмное устройство, приёмное устройство вывода продукции двумя потоками
12. производительность вентилятора13. ротационное устройство, передающее сфальцованные тетради на выводной транспортёр14. фронтальный вывод15. приёмное устройство, расположенное со стороны самонакладаline delivery — перемещение строки, подача строки
printed-side-up front delivery — устройство для фронтального вывода оттисков запечатанной стороной вверх
16. листовыводное устройство17. листовая приёмка -
8 master
1. оригинал; эталон; образцовый, эталонныйmaster drawing — оригинал; эталонный чертеж
2. фотошаблон; фотоформа3. матрица4. форма для множительных машинmaster input roll — полный рулон, установленный в машину
5. мастер; квалифицированный рабочийmaster roll — рабочий бумажный рулон, полный рулон
6. печатный оригинал; оригинал, изготовленный путём печатанияfilm master — оригинал микрофильма; оригинал на плёнке
7. бумажная офсетная форма8. шрифтоноситель9. наборная матрица -
9 patent
1) патент (охранный документ на изобретение, удостоверяющий признание предложения изобретением, его приоритет и исключительное право на него патентообладателя)2) патентовать; патентованный; патентный•- patent applied for
- patent in force
- patent being in force
- patent for a design
- patent for an invention
- patent for a plant
- patent for improvement
- patent in dispute
- patent on a design
- patent pending
- patent referred to
- patent abroad
- patent of addition
- patent of confirmation
- patent of importation
- patent of improvement
- patent of revalidation
- abandoned patent
- additional patent
- adjudicated patent
- AEC-owned patent
- anticipating patent
- apparatus patent
- art patent
- article patent
- assailable patent
- assigned patent
- atomic energy patent
- attackable patent
- attacked patent
- basic patent
- biological patent
- blocking patent
- blocking-off patent
- borderline patent
- British Letters patent
- broad patent
- business method patent
- cancelled patent
- ceased patent
- chemical patent
- cited patent
- collateral patent
- colonial patent
- combination patent
- Commission-owned patent
- communicated patent
- competing patent
- complementary patent
- composition-of-matter patent
- confirmation patent
- conflicting patent
- contestable patent
- copending patents
- corresponding patents
- deadwood patent
- dead-wood patent
- defective patent
- dependent patent
- design letters patent
- device patent
- disputed patent
- divisional patent
- domestic patent
- dominant patent
- dormant patent
- double patent
- dragnet patent
- drug patent
- duplicate patents
- earlier patent
- economic patent
- electrical patent
- European patent
- exclusive patent
- exercisable patent
- existing patent
- expired patent
- exploitable patent
- extended patent
- extinct patent
- fencing-off patent
- final patent
- foreign patent
- forfeited patent
- fortifying patent
- freed patent
- free-lance patent
- French pharmaceutical patent
- granted patent
- home patent
- importation patent
- improvement patent
- incipient patent
- incontestable patent
- independent patent
- indigenous patent
- industrial patent
- industrial development patent
- infringed patent
- infringing patent
- infringing patents
- inoperative patent
- interdependent patents
- intervening patent
- invalid patent
- issued patent
- joint patent
- key patent
- land patent
- lapsed patent
- later patent
- later-dated patent
- legally effective patent
- letters patent
- licensed patent
- litigious patent
- live patent
- machine patent
- main patent
- manufacture patent
- master patent
- material patent
- mechanical patent
- medical patent
- metallurgical patent
- method patent
- minor patent
- modification patent
- more recent patent
- narrow patent
- national patent
- national patent under the PCT
- native's patent
- new use patent
- non-convention patent
- Nordic patent
- not infringed patent
- nuisance patent
- objected patent
- obstructive patent
- old patent
- operative patent
- original patent
- ornamental design patent
- overlapping patents
- paper patent
- parallel patent
- parent patent
- pending patent
- petty patent
- pharmaceutical patent
- pioneer patent
- plant patent
- pooled patent
- posthumous patent
- practicable patent
- printed patent
- prior patent
- process patent
- product patent
- provisional European patent
- questionable patent
- reference patent
- regional patent
- reinstated patent
- reissue patent
- reissued patent
- related patent
- revoked patent
- scarecrow patent
- secret patent
- senior patent
- shot gun patent
- simultaneous patent
- small patent
- software patent
- standard patent
- strain patent
- strong patent
- structure patent
- subordinate patent
- subsequent patent
- subservient patent
- subsidiary patent
- sued upon patent
- suppressed patent
- transfer of technology patent
- unenforceable patent
- unexpired patent
- universal patent
- unjustified patent
- unused patent
- U. S. patent
- useful model patent
- utility patent
- valid patent
- valuable patent
- void patent
- voidable patent
- weak patent
- withheld patent
- world-wide patent
- worthless patent
- X-series patent
- younger patent
- youngest patent* * *патент (охранный документ, представляющий исключительнее право на осуществление, использование и продажу изобретения в течение определенного срока и на определенно» территории) -
10 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
-
11 ampacity (US)
(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 > ampacity (US)
-
12 continuous current
(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
непрерывный ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999]Тематики
- электротехника, основные понятия
EN
Англо-русский словарь нормативно-технической терминологии > continuous current
-
13 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
См. также в других словарях:
Apparatus sacer ad scriptores Veteris et Novi Testamenti — also simply called Apparatus sacer , is one of the most celebrated works of Antonio Possevino (the other being Bibliotheca selecta ). It is an overview of the different interpretations of the Old and New Testament by ecclesiastical authors from … Wikipedia
apparatus — [ˌapə reɪtəs] noun (plural apparatuses) 1》 the technical equipment or machinery needed for a particular activity or purpose. 2》 a complex structure within an organization: the apparatus of government. 3》 (also critical apparatus, apparatus… … English new terms dictionary
apparatus — n. 1 the equipment needed for a particular purpose or function, esp. scientific or technical. 2 a political or other complex organization. 3 Anat. the organs used to perform a particular process. 4 (in full apparatus criticus) a collection of… … Useful english dictionary
printed circuit — noun Date: 1946 a circuit for electronic apparatus made by depositing conductive material in continuous paths from terminal to terminal on an insulating surface … New Collegiate Dictionary
Critical apparatus — The critical apparatus (or Latin: apparatus criticus) is the critical and primary source material that accompanies an edition of a text. A critical apparatus is often a by product of textual criticism. Many editions employ a standard format for a … Wikipedia
Editions of the Bible — • Includes Hebrew and Greek editions Catholic Encyclopedia. Kevin Knight. 2006. Editions of the Bible Editions of the Bible … Catholic encyclopedia
biblical literature — Introduction four bodies of written works: the Old Testament writings according to the Hebrew canon; intertestamental works, including the Old Testament Apocrypha; the New Testament writings; and the New Testament Apocrypha. The Old… … Universalium
printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… … Universalium
Textual criticism — Carmina Cantabrigiensia, Manuscript C, folio 436v, 11th century Textual criticism (or lower criticism) is a branch of literary criticism that is concerned with the identification and removal of transcription errors in the texts of manuscripts.… … Wikipedia
Education of the Blind — • Includes statistics and history Catholic Encyclopedia. Kevin Knight. 2006. Education of the Blind Education of the Blind … Catholic encyclopedia
BIBLE — THE CANON, TEXT, AND EDITIONS canon general titles the canon the significance of the canon the process of canonization contents and titles of the books the tripartite canon … Encyclopedia of Judaism