-
41 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
-
42 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
-
43 FP
1) Общая лексика: рамочная программа (framework programme), флуоресцентная поляризация липидов сыворотки крови2) Компьютерная техника: File Pointer, Formatting Properties3) Геология: Fracture Plane4) Медицина: Family Practice5) Американизм: Freedom Of Press6) Ботаника: Flower Points7) Спорт: Fair Play, Former Players8) Военный термин: Field Party, Field Post, Fighting Points, Final Prototype, Fire Position, Fire Pulse, Fixed Pitch, Functional Proponent, field punishment, fighter propulsion, firing phase, firing platoon, fixed point, flat point, flight pay, flight publications, foolproof, foot patrol, forfeiture of pay, freight and passenger, financial planning9) Техника: fattening period, feedback, feedback potentiometer, film pack, fire plug, fission product, flameproof, flexibility point, flight programmer, flow line pressure, flow point, foot-pound, foot-pound-force, foreground processing, front projection, full period, full pressure, fusible plug, fusion point, positive10) Сельское хозяйство: Farm Points, fowl pox11) Шутливое выражение: Furious Poet12) Математика: Fundamental Parameter13) Религия: Florilegium Patristicum14) Метеорология: Front Polar15) Железнодорожный термин: Fordyce and Princeton Railroad Company16) Юридический термин: False Positive17) Автомобильный термин: fuel pump, fuel pump relay (Ford)18) Грубое выражение: Fucking Pussies19) Металлургия: Fire Proofing20) Оптика: Fabry-Perot21) Политика: French Polynesia22) Сокращение: Faceplate, Fishery Protection, Floating Point, Force Package, Force Projection, Frangible Projectile, Presorted First-class rate category abbreviation on letter mail key line, feedback positive, field protective, fireplace, foreign policy, forepeak, former pupil, forward perpendicular, fungus proof, Agence France Press (agency, France)23) Физиология: Food Poisoning24) Электроника: Full Power25) Вычислительная техника: flat package, format prefix, function processor, плавающая точка, функциональный процессор26) Нефть: final pressure, flowing pressure, flowline pressure, formation pressure, конечное давление (final pressure), точка замерзания (freezing point)27) Иммунология: Fat Potential, ferriprotoporphyrin29) Банковское дело: полностью оплаченный (fully paid), фиксированная цена (fixed price)30) Транспорт: Fast Pass31) Пищевая промышленность: Food Poison32) Фирменный знак: Founding Partner, Frankoma Pottery33) СМИ: Film And Print34) Бурение: гидродинамическое давление (flowing pressure), flowing pressure (usually refers to flowing tubing pressure)35) Глоссарий компании Сахалин Энерджи: Fire Protection Subcommittee, freeze protected, freeze protection, full port, полнопроходной, противопожарная защита (fire protection)36) Образование: Foster Parents37) Инвестиции: fixed price, fully paid38) Сетевые технологии: file protection, защита файла, поле префикса39) Полимеры: feed pump, flashless propellant40) Программирование: Font Position, единица функционального размера (см. function point)41) Сахалин Р: fire protection42) Физическая химия: Focusing Potential (в масс-спектроскопии)43) Безопасность: ответственное лицо (Focal Point)44) Расширение файла: Data (FileMaker Pro)45) Нефть и газ: fore peak, температура вспышки, форпик46) Электротехника: field-protective (relay)47) Имена и фамилии: Fanny Price48) Фармация: Польская фармакопея49) НАСДАК: Fibre Product50) Должность: Fishing Partner, Forensic Psychologist51) Чат: Fun Person, Funny Party52) Аэропорты: Forensic Pathologist53) НАСА: Frozen Planet -
44 Fp
1) Общая лексика: рамочная программа (framework programme), флуоресцентная поляризация липидов сыворотки крови2) Компьютерная техника: File Pointer, Formatting Properties3) Геология: Fracture Plane4) Медицина: Family Practice5) Американизм: Freedom Of Press6) Ботаника: Flower Points7) Спорт: Fair Play, Former Players8) Военный термин: Field Party, Field Post, Fighting Points, Final Prototype, Fire Position, Fire Pulse, Fixed Pitch, Functional Proponent, field punishment, fighter propulsion, firing phase, firing platoon, fixed point, flat point, flight pay, flight publications, foolproof, foot patrol, forfeiture of pay, freight and passenger, financial planning9) Техника: fattening period, feedback, feedback potentiometer, film pack, fire plug, fission product, flameproof, flexibility point, flight programmer, flow line pressure, flow point, foot-pound, foot-pound-force, foreground processing, front projection, full period, full pressure, fusible plug, fusion point, positive10) Сельское хозяйство: Farm Points, fowl pox11) Шутливое выражение: Furious Poet12) Математика: Fundamental Parameter13) Религия: Florilegium Patristicum14) Метеорология: Front Polar15) Железнодорожный термин: Fordyce and Princeton Railroad Company16) Юридический термин: False Positive17) Автомобильный термин: fuel pump, fuel pump relay (Ford)18) Грубое выражение: Fucking Pussies19) Металлургия: Fire Proofing20) Оптика: Fabry-Perot21) Политика: French Polynesia22) Сокращение: Faceplate, Fishery Protection, Floating Point, Force Package, Force Projection, Frangible Projectile, Presorted First-class rate category abbreviation on letter mail key line, feedback positive, field protective, fireplace, foreign policy, forepeak, former pupil, forward perpendicular, fungus proof, Agence France Press (agency, France)23) Физиология: Food Poisoning24) Электроника: Full Power25) Вычислительная техника: flat package, format prefix, function processor, плавающая точка, функциональный процессор26) Нефть: final pressure, flowing pressure, flowline pressure, formation pressure, конечное давление (final pressure), точка замерзания (freezing point)27) Иммунология: Fat Potential, ferriprotoporphyrin29) Банковское дело: полностью оплаченный (fully paid), фиксированная цена (fixed price)30) Транспорт: Fast Pass31) Пищевая промышленность: Food Poison32) Фирменный знак: Founding Partner, Frankoma Pottery33) СМИ: Film And Print34) Бурение: гидродинамическое давление (flowing pressure), flowing pressure (usually refers to flowing tubing pressure)35) Глоссарий компании Сахалин Энерджи: Fire Protection Subcommittee, freeze protected, freeze protection, full port, полнопроходной, противопожарная защита (fire protection)36) Образование: Foster Parents37) Инвестиции: fixed price, fully paid38) Сетевые технологии: file protection, защита файла, поле префикса39) Полимеры: feed pump, flashless propellant40) Программирование: Font Position, единица функционального размера (см. function point)41) Сахалин Р: fire protection42) Физическая химия: Focusing Potential (в масс-спектроскопии)43) Безопасность: ответственное лицо (Focal Point)44) Расширение файла: Data (FileMaker Pro)45) Нефть и газ: fore peak, температура вспышки, форпик46) Электротехника: field-protective (relay)47) Имена и фамилии: Fanny Price48) Фармация: Польская фармакопея49) НАСДАК: Fibre Product50) Должность: Fishing Partner, Forensic Psychologist51) Чат: Fun Person, Funny Party52) Аэропорты: Forensic Pathologist53) НАСА: Frozen Planet -
45 fp
1) Общая лексика: рамочная программа (framework programme), флуоресцентная поляризация липидов сыворотки крови2) Компьютерная техника: File Pointer, Formatting Properties3) Геология: Fracture Plane4) Медицина: Family Practice5) Американизм: Freedom Of Press6) Ботаника: Flower Points7) Спорт: Fair Play, Former Players8) Военный термин: Field Party, Field Post, Fighting Points, Final Prototype, Fire Position, Fire Pulse, Fixed Pitch, Functional Proponent, field punishment, fighter propulsion, firing phase, firing platoon, fixed point, flat point, flight pay, flight publications, foolproof, foot patrol, forfeiture of pay, freight and passenger, financial planning9) Техника: fattening period, feedback, feedback potentiometer, film pack, fire plug, fission product, flameproof, flexibility point, flight programmer, flow line pressure, flow point, foot-pound, foot-pound-force, foreground processing, front projection, full period, full pressure, fusible plug, fusion point, positive10) Сельское хозяйство: Farm Points, fowl pox11) Шутливое выражение: Furious Poet12) Математика: Fundamental Parameter13) Религия: Florilegium Patristicum14) Метеорология: Front Polar15) Железнодорожный термин: Fordyce and Princeton Railroad Company16) Юридический термин: False Positive17) Автомобильный термин: fuel pump, fuel pump relay (Ford)18) Грубое выражение: Fucking Pussies19) Металлургия: Fire Proofing20) Оптика: Fabry-Perot21) Политика: French Polynesia22) Сокращение: Faceplate, Fishery Protection, Floating Point, Force Package, Force Projection, Frangible Projectile, Presorted First-class rate category abbreviation on letter mail key line, feedback positive, field protective, fireplace, foreign policy, forepeak, former pupil, forward perpendicular, fungus proof, Agence France Press (agency, France)23) Физиология: Food Poisoning24) Электроника: Full Power25) Вычислительная техника: flat package, format prefix, function processor, плавающая точка, функциональный процессор26) Нефть: final pressure, flowing pressure, flowline pressure, formation pressure, конечное давление (final pressure), точка замерзания (freezing point)27) Иммунология: Fat Potential, ferriprotoporphyrin29) Банковское дело: полностью оплаченный (fully paid), фиксированная цена (fixed price)30) Транспорт: Fast Pass31) Пищевая промышленность: Food Poison32) Фирменный знак: Founding Partner, Frankoma Pottery33) СМИ: Film And Print34) Бурение: гидродинамическое давление (flowing pressure), flowing pressure (usually refers to flowing tubing pressure)35) Глоссарий компании Сахалин Энерджи: Fire Protection Subcommittee, freeze protected, freeze protection, full port, полнопроходной, противопожарная защита (fire protection)36) Образование: Foster Parents37) Инвестиции: fixed price, fully paid38) Сетевые технологии: file protection, защита файла, поле префикса39) Полимеры: feed pump, flashless propellant40) Программирование: Font Position, единица функционального размера (см. function point)41) Сахалин Р: fire protection42) Физическая химия: Focusing Potential (в масс-спектроскопии)43) Безопасность: ответственное лицо (Focal Point)44) Расширение файла: Data (FileMaker Pro)45) Нефть и газ: fore peak, температура вспышки, форпик46) Электротехника: field-protective (relay)47) Имена и фамилии: Fanny Price48) Фармация: Польская фармакопея49) НАСДАК: Fibre Product50) Должность: Fishing Partner, Forensic Psychologist51) Чат: Fun Person, Funny Party52) Аэропорты: Forensic Pathologist53) НАСА: Frozen Planet -
46 cold
холод; II холодный; в холодном состоянии- cold aggregate - cold air blast - cold air gun - cold air refrigerating machine - cold air refrigerating system - cold air return - cold automatic press for bolts - cold bend test - cold bending - cold blast - cold boot - cold box - cold bridge - cold cathode discharge lamp - cold cathode manometer - cold chamber - cold chisel - cold clearance - cold conductor - cold container - cold corrosion type wear - cold crack - cold cracking - cold cranking - cold cure - cold cut - cold cutter - cold-drawn - cold drawn wire - cold driving - cold drying - cold emission - cold enamel - cold end - cold end coating - cold endurance - cold engine - cold engine sludge - cold-extruded - cold extrusion - cold extrusion automatic press - cold finished - cold flame - cold flatting - cold flex - cold flexibility - cold flow - cold galvanizing - cold gas - cold gas turbine engine - cold glass finishing - cold glue - cold hammering - cold hardening - cold hardiness - cold headability - cold headed wire - cold header - cold heading - cold heat exchanger - cold idle control - cold inflation pressure - cold joint - cold junction - cold-laid asphalt pavement - cold lap - cold leveling - cold loss - cold metallization - cold mix - cold-mix type pavement - cold oil - cold oil fractionation - cold operation - cold patching - cold pipe straightening - cold plastic flow - cold plastic paint - cold plasticity - old plug - spark plug - cold polymer - cold press for bolts - cold-pressed - cold pressing - cold pressing test - cold pressure - cold pressure fixing - cold pressure welding - cold-producing medium - cold proor coolant - cold properties - cold pump - cold resistance - cold-resistant - cold-resisting property - cold-riveted - cold riveting - cold rod - cold-rolled - cold rolling - cold-room test - cold rubber - cold saw - cold saw blade - cold scuffing - cold setting - cold shearing - cold-short - cold-shot - cold slap - cold spark plug - cold start - cold start test - cold starting - cold-starting ability - cold-starting device - cold-starting heavy-oil engine - cold straightening - cold test - cold-testing laboratory - cold treatment - cold vulcanization - cold vulcanizing - cold weld - cold work -
47 material
1. материал, вещество2. грунт3. материальный, вещественныйmaterials by structural properties — материалы, классифицируемые по структурным свойствам
abrasive material — абразивный материал, абразив
4. глинистый материалbase material — основное вещество; основа; материал подложки
area material — печатный материал, подсчитываемый по площади
5. глинистая порода; глинистый грунтartificial pozzolanic material — искусственный пуццолановый материал, искусственный пуццолан
backing material — подкладочный материал, подкладка
bagged material — материал, поставляемый в мешках; материал, затариваемый в мешки
binding material — связующий материал, вяжущее
bonding material — вяжущий материал, вяжущее
cement-bound granular material — сцементировавшийся зернистый грунт; зернистый грунт, подвергнутый цементации
cementing material — минеральный вяжущий материал, минеральное вяжущее
coated material — чёрный щебень; щебень, обработанный чёрными вяжущими
coating material — обмазочный материал; обмазочная смесь, обмазка; штукатурка
composite material — композиционный материал, композит
fiber reinforced material — материал, армированный волокном
fill material — сыпучий материал, материал для засыпки
foamed-in-place acoustical materials — звукоизоляционные пенопласты, приготовляемые на месте укладки
6. зернистый материал7. зернистый грунтgritting materials — каменная мелочь, высевки, мелкий гравий
jointing material — материал для устройства швов; материал для герметизации стыков
laminated material — слоистый материал; слоистый пластик
lining material — облицовочный материал; футеровочный материал
8. рыхлый материал9. рыхлый грунтlow-tensile strength material — материал, обладающий малой прочностью при растяжении
maintenance patching material — материал для ямочного ремонта ; материал для мелкого отделочного ремонта
matrix material — вяжущий материал, вяжущее
nonconductive material — материал, не проводящий электротока, токоизолирующий материал
noncreeping material — материал с малой ползучестью, материал, практически не подверженный ползучести
parent material — минеральное или органическое вещество из материнской породы, которое образует грунт
10. пластичный материал11. пластическая масса, пластмассаpozzolanic material — пуццолан; пуццолановый материал
prebagged material — материал, затаренный в мешки
raw materials — сырьевые материалы, сырьё
recycled material — восстановленный материал; повторно используемый материал
release material — антиадгезионный материал, антиадгезионная смазка
resilient materials — эластомеры, эластичные материалы
matrice material — основная масса; шаблон
12. скальная порода13. элемент скальной породыsealing material — герметизирующий материал, герметик
sound material — прочный материал, качественный материал
sparkle material — материал, создающий блёскость покровного отделочного слоя
sprayed-on material — материал, наносимый набрызгом
strain-hardening material — самоупрочивающийся материал; материал, обладающий способностью к самоупрочнению
toxic material — токсичный материал, токсичное вещество
trim materials — материалы для плакирования деталей; материалы износостойких покрытий
walling material — стеновой материал, материал стен
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48 index
1) индекс; показатель; коэффициент || индексировать, помечать индексами, снабжать индексами; вчт. (с)формировать индекс3) указатель, стрелка ( измерительного прибора) || показывать5) (алфавитный или предметный) указатель, индекс || составлять( алфавитный или предметный) указатель6) полигр. (вырубленные) уступы ( на обрезе справочного издания)•-
acidity index
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acoustoelectric index
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adiabatic index
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aggregate index
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air pollution index
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air quality index
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amplitude modulation index
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antecedent precipitation index
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aridity index
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array index
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articulation index
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asphalt penetration index
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beam index
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bell-position index
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branching index
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breaking index
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burning index
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caking index
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capability utilization index
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carbonization index of oil
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catalog index
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circulation index
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citation index
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cladding index of refraction
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clayiness index
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coke-quality index
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coke-strength index
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color index
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cone index
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consistency index
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constraint index
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core index of refraction
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correction index
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corrosion index
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crown-area index
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current index
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current-noise index
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curve index
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cycle index
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cylinder index
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decontamination index
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dense index
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density index
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deterioration index
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diaphragm index
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dielectric index
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dielectric loss index
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diesel index
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dilatometer test index
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directivity index
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double bond index
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drillability index
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driving index
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drum index
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ductility index
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dust index
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ear height index
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ecological sensitivity index
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embrittlement index
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emission index
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environment quality index
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extraordinary refraction index
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extraordinary index
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extreme values index
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face shifting index
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fine index
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flow-behavior index
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fractional index
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fracture toughness index
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free fluid index
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go/no-go index
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graded index
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gravity index
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grindability index
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gross index
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group refraction index
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group index
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gum inhibiting index
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hardness index
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hash index
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hazard index
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hydraulic index
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hydrogen index
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impurity index
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index of absorption
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index of cograduation
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index of cooperation
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index of correlation
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index of dispersion
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index of extinction
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index of goodness
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index of irrigation need
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index of lens
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index of moisture conditions
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index of plasticity
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index of refraction
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index of root
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index of thunderstorm activity
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index of turbulence
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index of wetness
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infiltration index
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injectivity index
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inverted index
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knock-limited density index
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limiting viscosity index
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loss index
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machinability index
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magnetic loss index
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main index
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mixing index
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mode index
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modified viscosity index
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modulation index
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moldability index
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molding index
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nondense index
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oiliness index
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optical index
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ordinary refraction index
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ordinary index
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overall index
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oversampling index
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oxygen index
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pattern correspondence index
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perceived environmental quality index
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performance index
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permanganate index
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permeability index
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plasticity index
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pluvial index
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pollutional index
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pollution index
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porosity index
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privacy index
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probe index
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processability index
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producible oil index
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productivity index
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quality index
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rainfall index
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range index
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reactivity index
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reflection index
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refraction index
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reliability index
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resistivity index
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reversed index
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reverse index
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riding properties index
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Roga index
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roof quality index
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salt index
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scintillation index
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secondary index
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selection index
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sharpness index
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slagging index
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snow accumulation index
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stand density index
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staple index
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static reserve index
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stepped index
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step index
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summation index
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survival index
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swelling index
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throwing index
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track index
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traffic noise index
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viscosity index
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viscosity-temperature index
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viscosity-zone index
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volatility index
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voltage index
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vorticity area index
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water pollution index
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water quality index
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wet grip index
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winter severity index
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word index
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work-hardening index -
49 cash-on-cash return
фин. доходность "наличные-на-наличные"* (отношение денежных поступлений от инвестиций к денежным расходам на приобретение инвестиционного актива; обычно используется для оценки доходности ценных бумаг, не имеющих активного вторичного рынка)See:
* * *
доходность "наличные-на-наличные": метод исчисления дохода по инвестициям, для которых не существует активного вторичного рынка (напр., товарищества с ограниченной ответственностью в США); обычно суммарный годовой доход в долларах делится на общую сумму инвестированных денег (напр., при ежегодном доходе в1 тыс. долл. на фактически инвестированные 10 тыс. долл. доходность принимается за 10%); см. current yield;* * ** * *. Usually reserved for real estate income properties, it's the annual cash flow from the property divided by your cash investment. Sometimes called return on equity or equity dividend rate. It's a quick and dirty way to evaluate an investment. . Small Business Taxes & Management 2 . -
50 consumer
сущ.1) эк. потребитель; покупательATTRIBUTES: average 2. 1), 2. 2), conventional 2. 2), end 1. 1), final 1. 1), individual 1. 2), industrial 1. 1), а, loyal 1. 1), potential 2. 2), prospective 2. 2), rational 2. 1), reasonable 2. 1), representative 2. 2), n2, target 3. 1), ultimate 2. 2), n1
British consumers are paying much more than their counterparts in mainland Europe for a wide range of goods. — Британские потребители покупают многие товары по значительно более высокой цене, чем потребители материковой Европы.
Our consumers expect products which are not only delicious (and safe) but which have been produced fairly and ethically. — Наши потребители ожидают таких продуктов, которые не только вкусны и безопасны для здоровья, но еще и были произведены надлежащим образом и в согласии с этическими нормами.
An average consumer for heating in Turkey uses fuel wood at a rate of 0.75 m3 yr. — Среднестатистический потребитель отопления в Турции использует 0,75 м3 в год древесного топлива.
See:average consumer, conventional consumer, disadvantaged consumer, end consumer, end-consumer, fickle consumer, final consumer, green consumers, heat consumer, individual consumer, industrial consumer, interested consumer, intermediate consumer, loyal consumer, manipulated consumer, potential consumer, price-conscious consumer, price-sensitive consumer, prospective consumer, rational consumer, reasonable consumer, representative consumer, savvy consumer, target consumer, ultimate consumer, water consumer, consumer acceptance, consumer account, consumer activist, consumer advertisement, consumer advertising, consumer advisory board, consumer advisory council, consumer advocate, consumer affluence, consumer analysis, consumer anticipations, consumer appeal, consumer attitude, consumer audience, consumer awareness, consumer bank, consumer basket, consumer behaviour, consumer benefit, consumer boom, consumer brochure, consumer budget, consumer business, consumer buying decision, consumer capitalism, consumer choice, consumer clinic, consumer club, consumer commodities, consumer communications, consumer comparison, consumer complaint, consumer confidence, consumer container, consumer cooperation, consumer cooperative, consumer council, consumer credit, consumer culture, consumer debenture, consumer decision making, consumer deficit, consumer delivery, consumer demand, consumer diary, consumer discrimination, consumer durable product, consumer durables, consumer economics, consumer education, consumer effect, consumer electronics, consumer environment, consumer equilibrium, consumer evaluation, consumer expectations, consumer expenditure, consumer favour, consumer feedback, consumer finance company, consumer flow, consumer franchise, consumer fraud, consumer goods, consumer group, consumer guide, consumer habit, consumer impression, consumer income, consumer inertia, consumer information, consumer inquiry, consumer insurance, consumer interest, consumer interview, consumer items, consumer jury, consumer knowledge, consumer language, consumer law, consumer learnings, consumer lease, consumer leasing, consumer legislation, consumer lifestyle, consumer lines, consumer list, consumer loan, consumer lobby, consumer loyalty, consumer magazine, consumer market, consumer marketing, consumer motivation, consumer movement, consumer needs, consumer non-durables, consumer orientation, consumer pack, consumer panel, consumer patronage, consumer perception, consumer personality, consumer policy, consumer population, consumer practice, consumer preferences, consumer premium, consumer pressure, consumer price, consumer products, consumer profile, consumer promotion, consumer properties, consumer protection, consumer psychologist, consumer psychology, consumer publication, consumer purchase, consumer purchaser, consumer rating, consumer reaction, consumer relations, consumer report, consumer research, consumer resistance, consumer response, consumer rights, consumer sale, consumer sales, consumer satisfaction, consumer segment, consumer service, consumer services, consumer setting, consumer shopping, consumer society, consumer sophistication, consumer sovereignty, consumer spending, consumer spendings, consumer study, consumer surplus, consumer survey, consumer tastes, consumer trade practices, consumer trends, consumer use tests, consumer utility, consumer valuation, consumer value, consumer vulnerability, consumer warranty, consumer waste, consumer wealth, consumer welfare, consumer's account, consumers' attitude, consumer's choice, consumer's cooperative, consumer's demand, consumers expenditure, consumer's goods, consumer's indifference curve, consumers market, consumers' market, consumers' panel, consumer's point, consumers' preference, consumers' remedy, consumer's surplus, consumers' surplus, consumer's test, consumer's wants, cost to consumer, price to consumer COMBS: business to consumer, business-to-consumer, business-to-consumer firm, competition for the consumer's dollar, Consumer Credit Act 1974, Consumer Credit Protection Act, Consumer Goods Pricing Act, Consumer Magazine and Agri-Media Rates and Data, Consumer Product Safety Act, Consumer Products Warranties Act, Consumer Protection Act 1961, Consumer Protection Act 1971, Consumer Reports, Consumer Safety Act 1978, Department of Banking and Consumer Finance v. Clarke, Ethical Consumer, Farmer-to-Consumer Direct Marketing Act, Home Equity Loan Consumer Protection Act, Telephone Consumer Protection Act 1991, Uniform Consumer Credit Code, Australian Competition and Consumer Commission, Bureau of Consumer Protection, Consumer Bankers Association, consumer confidence, consumer expenditure2) биол., эк. прир. консумент (организм, который потребляет другие организмы; выделяют первичные, вторичные и третичные консументы)See:
* * *
потребитель: лицо, которое в конечном итоге пользуется данным товаром или услугой (это не всегда покупатель).* * * -
51 Corliss, George Henry
SUBJECT AREA: Steam and internal combustion engines[br]b. 2 June 1817 Easton, Washington City, New York, USAd. 21 February 1888 USA[br]American inventor of a cut-off mechanism linked to the governor which revolutionized the operation of steam engines.[br]Corliss's father was a physician and surgeon. The son was educated at Greenwich, New York, but while he showed an aptitude for mathematics and mechanics he first of all became a storekeeper and then clerk, bookkeeper, salesperson and official measurer and inspector of the cloth produced at W.Mowbray \& Son. He went to the Castleton Academy, Vermont, for three years and at the age of 21 returned to a store of his own in Greenwich. Complaints about stitching in the boots he sold led him to patent a sewing machine. He approached Fairbanks, Bancroft \& Co., Providence, Rhode Island, machine and steam engine builders, about producing his machine, but they agreed to take him on as a draughtsman providing he abandoned it. Corliss moved to Providence with his family and soon revolutionized the design and construction of steam engines. Although he started working out ideas for his engine in 1846 and completed one in 1848 for the Providence Dyeing, Bleaching and Calendering Company, it was not until March 1849 that he obtained a patent. By that time he had joined John Barstow and E.J.Nightingale to form a new company, Corliss Nightingale \& Co., to build his design of steam-engines. He used paired valves, two inlet and two exhaust, placed on opposite sides of the cylinder, which gave good thermal properties in the flow of steam. His wrist-plate operating mechanism gave quick opening and his trip mechanism allowed the governor to regulate the closure of the inlet valve, giving maximum expansion for any load. It has been claimed that Corliss should rank equally with James Watt in the development of the steam-engine. The new company bought land in Providence for a factory which was completed in 1856 when the Corliss Engine Company was incorporated. Corliss directed the business activities as well as technical improvements. He took out further patents modifying his valve gear in 1851, 1852, 1859, 1867, 1875, 1880. The business grew until well over 1,000 workers were employed. The cylindrical oscillating valve normally associated with the Corliss engine did not make its appearance until 1850 and was included in the 1859 patent. The impressive beam engine designed for the 1876 Centennial Exhibition by E. Reynolds was the product of Corliss's works. Corliss also patented gear-cutting machines, boilers, condensing apparatus and a pumping engine for waterworks. While having little interest in politics, he represented North Providence in the General Assembly of Rhode Island between 1868 and 1870.[br]Further ReadingMany obituaries appeared in engineering journals at the time of his death. Dictionary of American Biography, 1930, Vol. IV, New York: C.Scribner's Sons. R.L.Hills, 1989, Power from Steam. A History of the Stationary Steam Engine, Cambridge University Press (explains Corliss's development of his valve gear).J.L.Wood, 1980–1, "The introduction of the Corliss engine to Britain", Transactions of the Newcomen Society 52 (provides an account of the introduction of his valve gear to Britain).W.H.Uhland, 1879, Corliss Engines and Allied Steam-motors, London: E. \& F.N.Spon.RLH -
52 FPP
- силовой щит установки
- множитель, зависящий от физических свойств среды
- коэффициент свойств среды
- группа точек потока
группа точек потока
Группа одновременно существующих точек потока, которые имеют общую маршрутизацию (МСЭ-T G.8010/ Y.1306 МСЭ-Т Y.1314 МСЭ-Т Y.1370, МСЭ-Т G.809).
[ http://www.iks-media.ru/glossary/index.html?glossid=2400324]Тематики
- электросвязь, основные понятия
EN
коэффициент свойств среды
—
[А.С.Гольдберг. Англо-русский энергетический словарь. 2006 г.]Тематики
EN
множитель, зависящий от физических свойств среды
—
[А.С.Гольдберг. Англо-русский энергетический словарь. 2006 г.]Тематики
EN
силовой щит установки
—
[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
Англо-русский словарь нормативно-технической терминологии > FPP
-
53 electric arc phenomenon
явление электрической дуги
-
[Интент]Параллельные тексты EN-RU
Electric arc phenomenon
The electric arc is a phenomenon which takes place as a consequence of a discharge which occurs when the voltage between two points exceeds the insulating strength limit of the interposed gas; then, in the presence of suitable conditions, a plasma is generated which carries the electric current till the opening of the protective device on the supply side.
Gases, which are good insulating means under normal conditions, may become current conductors in consequence of a change in their chemical-physical properties due to a temperature rise or to other external factors.
To understand how an electrical arc originates, reference can be made to what happens when a circuit opens or closes.
During the opening phase of an electric circuit the contacts of the protective device start to separate thus offering to the current a gradually decreasing section; therefore the current meets growing resistance with a consequent rise in the temperature.
As soon as the contacts start to separate, the voltage applied to the circuit exceeds the dielectric strength of the air, causing its perforation through a discharge.
The high temperature causes the ionization of the surrounding air which keeps the current circulating in the form of electrical arc. Besides thermal ionization, there is also an electron emission from the cathode due to the thermionic effect; the ions formed in the gas due to the very high temperature are accelerated by the electric field, strike the cathode, release energy in the collision thus causing a localized heating which generates electron emission.
The electrical arc lasts till the voltage at its ends supplies the energy sufficient to compensate for the quantity of heat dissipated and to maintain the suitable conditions of temperature. If the arc is elongated and cooled, the conditions necessary for its maintenance lack and it extinguishes.
Analogously, an arc can originate also as a consequence of a short-circuit between phases. A short-circuit is a low impedance connection between two conductors at different voltages.
The conducting element which constitutes the low impedance connection (e.g. a metallic tool forgotten on the busbars inside the enclosure, a wrong wiring or a body of an animal entered inside the enclosure), subject to the difference of potential is passed through by a current of generally high value, depending on the characteristics of the circuit.
The flow of the high fault current causes the overheating of the cables or of the circuit busbars, up to the melting of the conductors of lower section; as soon as the conductor melts, analogous conditions to those present during the circuit opening arise. At that point an arc starts which lasts either till the protective devices intervene or till the conditions necessary for its stability subsist.
The electric arc is characterized by an intense ionization of the gaseous means, by reduced drops of the anodic and cathodic voltage (10 V and 40 V respectively), by high or very high current density in the middle of the column (of the order of 102-103 up to 107 A/cm2), by very high temperatures (thousands of °C) always in the middle of the current column and – in low voltage - by a distance between the ends variable from some microns to some centimeters.
[ABB]Явление электрической дуги
Электрическая дуга между двумя электродами в газе представляет собой физическое явление, возникающее в тот момент, когда напряжения между двумя электродами превышает значение электрической прочности изоляции данного газа.
При наличии подходящих условий образуется плазма, по которой протекает электрический ток. Ток будет протекать до тех пор, пока на стороне электропитания не сработает защитное устройство.
Газы, являющиеся хорошим изолятором, при нормальных условиях, могут стать проводником в результате изменения их физико-химических свойств, которые могут произойти вследствие увеличения температуры или в результате воздействия каких-либо иных внешних факторов.
Для того чтобы понять механизм возникновения электрической дуги, следует рассмотреть, что происходит при размыкании или замыкании электрической цепи.
При размыкании электрической цепи контакты защитного устройства начинают расходиться, в результате чего постепенно уменьшается сечение контактной поверхности, через которую протекает ток.
Сопротивление электрической цепи возрастает, что приводит к увеличению температуры.
Как только контакты начнут отходить один от другого, приложенное напряжение превысит электрическую прочность воздуха, что вызовет электрический пробой.
Высокая температура приведет к ионизации воздуха, которая обеспечит протекание электрического тока по проводнику, представляющему собой электрическую дугу. Кроме термической ионизации молекул воздуха происходит также эмиссия электронов с катода, вызванная термоэлектронным эффектом. Образующиеся под воздействием очень высокой температуры ионы ускоряются в электрическом поле и бомбардируют катод. Высвобождающаяся, в результате столкновения энергия, вызывает локальный нагрев, который, в свою очередь, приводит к эмиссии электронов.
Электрическая дуга длится до тех пор, пока напряжение на ее концах обеспечивает поступление энергии, достаточной для компенсации выделяющегося тепла и для сохранения условий поддержания высокой температуры. Если дуга вытягивается и охлаждается, то условия, необходимые для ее поддержания, исчезают и дуга гаснет.
Аналогичным образом возникает дуга в результате короткого замыкания электрической цепи. Короткое замыкание представляет собой низкоомное соединение двух проводников, находящихся под разными потенциалами.
Проводящий элемент с малым сопротивлением, например, металлический инструмент, забытый на шинах внутри комплектного устройства, ошибка в электромонтаже или тело животного, случайно попавшего в комплектное устройство, может соединить элементы, находящиеся под разными потенциалами, в результате чего через низкоомное соединение потечет электрический ток, значение которого определяется параметрами образовавшейся короткозамкнутой цепи.
Протекание большого тока короткого замыкания вызывает перегрев кабелей или шин, который может привести к расплавлению проводников с меньшим сечением. Как только проводник расплавится, возникает ситуация, аналогичная размыканию электрической цепи. Т. е. в момент размыкания возникает дуга, которая длится либо до срабатывания защитного устройства, либо до тех пор, пока существуют условия, обеспечивающие её стабильность.
Электрическая дуга характеризуется интенсивной ионизацией газов, что приводит к падению анодного и катодного напряжений (на 10 и 40 В соответственно), высокой или очень высокой плотностью тока в середине плазменного шнура (от 102-103 до 107 А/см2), очень высокой температурой (сотни градусов Цельсия) всегда в середине плазменного шнура и низкому падению напряжения при расстоянии между концами дуги от нескольких микрон до нескольких сантиметров.
[Перевод Интент]Тематики
- НКУ (шкафы, пульты,...)
EN
Англо-русский словарь нормативно-технической терминологии > electric arc phenomenon
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Properties of water — H2O and HOH redirect here. For other uses, see H2O (disambiguation) and HOH (disambiguation). This article is about the physical and chemical properties of pure water. For general discussion and its distribution and importance in life, see Water … Wikipedia
Flow network — In graph theory, a flow network is a directed graph where each edge has a capacity and each edge receives a flow. The amount of flow on an edge cannot exceed the capacity of the edge. Often in Operations Research, a directed graph is called a… … Wikipedia
Flow velocity — In fluid dynamics the flow velocity, or velocity field, of a fluid is a vector field which is used to mathematically describe the motion of a fluid.DefinitionThe flow velocity of a fluid is a vector field: mathbf{u}=mathbf{u}(mathbf{x},t)which… … Wikipedia
Flow visualization — In fluid dynamics it is critically important to see the patterns produced by flowing fluids, in order to understand them. We can appreciate this on several levels: Most fluids (air, water, etc.) are transparent, thus their flow patterns are… … Wikipedia
Properties of concrete — Concrete has relatively high compressive strength, but significantly lower tensile strength, and as such is usually reinforced with materials that are strong in tension (often steel). The elasticity of concrete is relatively constant at low… … Wikipedia
Flow tracer — A flow tracer is any fluid property used to track flow. The concentration of a chemical compound in the fluid can be used as a chemical tracer, and characteristics such as temperature are physical tracers. Tracers may be artificially introduced,… … Wikipedia