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1 maximum power dissipation
Большой англо-русский и русско-английский словарь > maximum power dissipation
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2 maximum power dissipation
максимально допустимая мощность рассеяния, максимально допустимая рассеиваемая мощностьАнгло-русский словарь технических терминов > maximum power dissipation
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3 maximum power dissipation
1) Техника: максимально допустимая мощность рассеивания, максимально допустимая мощность рассеяния, максимально допустимая рассеиваемая мощность2) Телекоммуникации: предельно допустимая мощность рассеянияУниверсальный англо-русский словарь > maximum power dissipation
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4 maximum power dissipation
English-Russian dictionary of telecommunications and their abbreviations > maximum power dissipation
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5 maximum power dissipation
உச்சத் திறன் இழப்பு -
6 maximum power dissipation of the cartridge fuse-link
2.4 максимальная мощность рассеивания в держателе плавкой вставки (maximum power dissipation of the cartridge fuse-link): Мощность рассеивания в держателе плавкой вставки, значение которой:
2.4.1 в случае нагрузки сверхтоком PV1 равно значению максимальной выделяемой мощности в соответствии с ГОСТ Р 50538;
2.4.2 в случае номинальной нагрузки PV2равно значению номинальной выделяемой мощности при номинальных характеристиках, т.е. при максимальном рабочем напряжении и номинальном токе в соответствии с ГОСТ Р 50538.
Источник: ГОСТ Р 50030.7.3-2009: Аппаратура распределения и управления низковольтная. Часть 7.3. Электрооборудование вспомогательное. Требования безопасности к колодкам выводов для плавких предохранителей оригинал документа
Англо-русский словарь нормативно-технической терминологии > maximum power dissipation of the cartridge fuse-link
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7 maximum allowable continuous power dissipation
maximum allowable continuous power dissipation höchstzulässige Dauerverlustleistung fEnglish-German dictionary of Electrical Engineering and Electronics > maximum allowable continuous power dissipation
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8 maximum peak power dissipation
- максимально допустимая импульсная рассеиваемая мощность биполярного транзистора
максимально допустимая импульсная рассеиваемая мощность биполярного транзистора
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Обозначение
Pи max
PM max
Примечание
Максимально допустимыми параметрами называются значения конкретных режимов биполярных транзисторов, которые не должны превышать при любых условиях эксплуатации и при которых обеспечивается заданная надежность.
Максимально допустимые импульсные параметры приводятся для заданной скважности и длительности импульсов.
Когда не возникает сомнений в том, что используемое буквенное обозначение относится к максимально допустимому параметру, можно опускать индекс "max".
[ ГОСТ 20003-74]Тематики
EN
DE
FR
80. Максимально допустимая импульсная рассеиваемая мощность биполярного транзистора
D. Maximal zulässige Impulsverlustleistung
E. Maximum peak power dissipation
F. Puissance dissipée de crête maximale
* В схеме с общей базой или общим эмиттером добавляется индекс соответственно «б» или «э» для отечественных буквенных обозначений и «b» и «е» для международных обозначений.
** Максимально допустимыми параметрами называются значения конкретных режимов биполярных транзисторов, которые не должны превышать при любых условиях эксплуатации и при которых обеспечивается заданная надежность.
Максимально допустимые импульсные параметры приводятся для заданной скважности и длительности импульсов.
Когда не возникает сомнений в том, что используемое буквенное обозначение относится к максимально допустимому параметру, можно опускать индекс «max».
Источник: ГОСТ 20003-74: Транзисторы биполярные. Термины, определения и буквенные обозначения параметров оригинал документа
Англо-русский словарь нормативно-технической терминологии > maximum peak power dissipation
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9 maximum collector power dissipation (d.c.)
максимально допустимая постоянная рассеиваемая мощность коллектора
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Обозначение
PК max
PС max
Примечание
Максимально допустимыми параметрами называются значения конкретных режимов биполярных транзисторов, которые не должны превышать при любых условиях эксплуатации и при которых обеспечивается заданная надежность.
Максимально допустимые импульсные параметры приводятся для заданной скважности и длительности импульсов.
Когда не возникает сомнений в том, что используемое буквенное обозначение относится к максимально допустимому параметру, можно опускать индекс "max".
[ ГОСТ 20003-74]Тематики
EN
- maximum collector power dissipation (d.c.)
DE
FR
78. Максимально допустимая постоянная рассеиваемая мощность коллектора
D. Maximal zulässige Kollektorverlustleistung
E. Maximum collector power dissipation (d.c.)
F. Puissance dissipée au collecteur (continue) maximale
РК max
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Источник: ГОСТ 20003-74: Транзисторы биполярные. Термины, определения и буквенные обозначения параметров оригинал документа
Англо-русский словарь нормативно-технической терминологии > maximum collector power dissipation (d.c.)
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10 maximum admissible power dissipation
максимально допустимая рассеиваемая мощность ФЭПП
Максимальная электрическая мощность, рассеиваемая ФЭПП, при которой отклонение его параметров от номинальных значений не превышает указанных пределов при длительной работе.
Обозначение
Pmax
[ ГОСТ 21934-83]Тематики
- приемники излуч. полупроводн. и фотоприемн. устр.
EN
DE
FR
139. Максимально допустимая рассеиваемая мощность ФЭПП
D. Maximal zulässige Verlustleistung
E. Maximum admissible power dissipation
F. Puissance dissipée maximale admissible
Рmax
Максимальная электрическая мощность, рассеиваемая ФЭПП, при которой отклонение его параметров от номинальных значений не превышает указанных пределов при длительной работе
Источник: ГОСТ 21934-83: Приемники излучения полупроводниковые фотоэлектрические и фотоприемные устройства. Термины и определения оригинал документа
Англо-русский словарь нормативно-технической терминологии > maximum admissible power dissipation
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11 maximum collector power dissipation (average)
максимально допустимая средняя рассеиваемая мощность коллектора
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Обозначение
PК,ср max
Примечание
Максимально допустимыми параметрами называются значения конкретных режимов биполярных транзисторов, которые не должны превышать при любых условиях эксплуатации и при которых обеспечивается заданная надежность.
Максимально допустимые импульсные параметры приводятся для заданной скважности и длительности импульсов.
Когда не возникает сомнений в том, что используемое буквенное обозначение относится к максимально допустимому параметру, можно опускать индекс "max".
[ ГОСТ 20003-74]Тематики
EN
FR
79. Максимально допустимая средняя рассеиваемая мощность коллектора
E. Maximum collector power dissipation (average)
F. Puissance dissipée au collecteur (moyenne) maximale
РК, ср max
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Источник: ГОСТ 20003-74: Транзисторы биполярные. Термины, определения и буквенные обозначения параметров оригинал документа
Англо-русский словарь нормативно-технической терминологии > maximum collector power dissipation (average)
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12 dissipation
1) диссипация, рассеяние2) рассеивание3) мощность рассеяния, рассеиваемая мощность•- average power dissipation -
cloud dissipation
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coil dissipation
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collector dissipation
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dielectric dissipation
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electrode dissipation
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energy dissipation
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fog dissipation
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frictional heat dissipation
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heat dissipation
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jump-type dissipation
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maximum power dissipation
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power dissipation
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quiescent dissipation
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rated dissipation
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reverse power dissipation
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turbulence dissipation -
13 dissipation
English-Russian dictionary of telecommunications and their abbreviations > dissipation
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14 power
1) сила
2) вальный
3) мощность
4) степенной
5) электропитающий
6) электросила
7) электросиловой
8) энергетика
9) энергетический
10) <engin.> питать
11) степень
12) показатель степени
13) энергия
14) власть
15) мощь
16) способность
17) степенный
18) <math.> мощность множества
– A-F power
– absorb power
– active power
– antenna power
– available power
– average power
– axiom of power
– base of the power
– base power
– brake power
– calorific power
– cementing power
– continuous power
– coupling power
– cut power
– design power
– desulphurizing power
– dissipated power
– dissipation power
– draugth power
– driving power
– echo-signal power
– electric power
– emergency power
– exchange power
– exponent of power
– filament power
– fourth power
– fractional power
– heater power
– horse power
– idling power
– indicated power
– input power
– instantaneous power
– landing power
– leakage power
– loss power
– maximum power
– moderating power
– noise power
– nominal power
– nuclear power
– odal power
– ouput power
– output power
– oxidation power
– peak power
– power amplification
– power amplifier
– power bay section
– power cable
– power capacitor
– power circuit
– power cleaver
– power conditions
– power conduit
– power consumption
– power contactor
– power cord
– power cultivator
– power cylinder
– power delivered
– power density
– power divider
– power drain
– power efficiency
– power electronics
– power engineer
– power engineering
– power facilities
– power factor
– power failure
– power feed
– power flux
– power function
– power gas
– power grader
– power grid
– power hack-saw
– power hammer
– power handling
– power house
– power imputs
– power input
– power is transmitted
– power isolator
– power klystron
– power level
– power levelling
– power line
– power load
– power loss
– power mean
– power meter
– power miser
– power of a point
– power of an engine
– power oil
– power pack
– power penetration
– power plant
– power press
– power pulser
– power pump
– power reactor
– power rectifier
– power reserve
– power residue
– power ringing
– power scraper
– power series
– power setting
– power shaft
– power shortage
– power slewing
– power source
– power spectrum
– power splitter
– power station
– power supply
– power switch
– power take-off
– power takeoff
– power thyristor
– power tool
– power transfer
– power transformer
– power transistor
– power transmission
– power trunk
– power unit
– power valve
– power water
– power wiring
– pump power
– purchasing power
– put out power
– radiating power
– raising to a power
– rated power
– reactive power
– reduced power
– required power
– resolving power
– saving of power
– shaft power
– short-circuit power
– signal power
– solar power
– sound power
– source power
– starting power
– supply power
– take-off power
– thermonuclear power
– to the second power
– total power
– tractive power
– trasnfer power
– turn on power
– turn up power
– under own power
– unit power
– useful power
absolute thermoelectric power — коэффициент термоэлектродвижущей силы
atomic power station — атомная станция, АЭС
auxiliary power requirements — расход энергии на собственные нужды
coal-burning power plant — электростанция на твердом топливе
distribution power transformer — трансформатор силовой линейный
electric power plant — силовая электроустановка, <engin.> электростанция
engine-propeller power plant — винтомоторная силовая установка
hydroelectric power plant — <energ.> гидростанция, гидроэлектростанция, гэс
industrial power association — <engin.> объединение производственное энергетическое
intelligent power management — интеллектуальное управление электропитанием
power flux density — <phys.> плотность потока мощности
power generating unit — <engin.> энергоблок
power per liter of displacement — <engin.> литровая мощность
power plant topping — <engin.> надстройка
power ringing generator — телефонный машинный индуктор, индуктор машинный
power supply unit — < radio> агрегат питания
propeller power coefficient — <phys.> коэффициент мощности винта
radio-frequency power amplifier — генератор с внешним возбуждением
unit power rating — <engin.> мощность удельная
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15 power
1) мощностьpower delivered — электр. отдаваемая мощность
- AF power2) энергия || снабжать энергиейto remove power from — снимать питание с…
3) источник энергии || служить источником энергии4) мат. степень; показатель степени || возводить в степеньraising to a power — матем. возведение в степень
to the second power — в квадрате; квадратически
5) способность; возможность; склонность8) мощь, сила || силовой9) двигатель, мотор, силовой привод10) мат. мощность множестваcompact to power m — мат. компактный с точностью до мощности m
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16 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
-
17 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)
-
18 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
-
19 current-carrying capacity
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
предельно допустимый ток
—
[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
-
20 rate
3) частота4) расход5) норма || нормировать6) тариф || тарифицировать7) степень8) отношение; коэффициент10) оценка || оценивать11) определять; устанавливать; подсчитывать; рассчитывать (напр. мощность, несущую способность)•rates to consumers — тарифы на отпуск (напр. электроэнергии) потребителям-
absolute disintegrate rate
-
absorbed dose rate
-
acceptance rate
-
accident rate
-
adiabatic lapse rate
-
advance rate
-
aging rate
-
allowable leak rate
-
angular rate
-
annual depletion rate
-
application rate
-
area rate
-
arrival rate
-
ascensional rate
-
assessed failure rate
-
attenuation rate
-
autoconvective lapse rate
-
base wage rate
-
baud rate
-
bearer rate
-
beating rate
-
bit rate
-
bit-error rate
-
bit-transfer rate
-
block meter rate
-
block-error rate
-
boiling rate
-
boil-up rate
-
bonus rate
-
break flow rate
-
breeding rate
-
burning rate
-
calling rate
-
capture rate
-
carbonization rate
-
cargo rate
-
carrier-ionization rate
-
casting rate
-
catalyst circulation rate
-
charging rate
-
chipping rate
-
chip rate
-
chopping rate
-
circulation rate
-
class rate
-
climb rate
-
clock rate
-
closed rate
-
closure rate
-
coke rate
-
cold storage rates
-
collision rate
-
combustion rate
-
completion rate
-
concentration rate
-
containment leak rate
-
continuous rate
-
controlled rate
-
convective expansion rate
-
conversion rate
-
conveyance rate
-
cooling rate
-
core heat generation rate
-
corrosion rate
-
counting rate
-
crack growth rate
-
creep rate
-
crosshead rate
-
cure rate
-
cutter wear rate
-
daily consumptive use rate
-
data-transfer rate
-
data rate
-
decay rate
-
decompression rate
-
deflection rate
-
deionization rate
-
delivery rate
-
demand cost rate
-
demand rate
-
deposition rate
-
descent rate
-
development rate
-
deviation rate
-
differential rate
-
differentiated electricity rates
-
diffusion rate
-
directional rate
-
discharge rate
-
disposal rate
-
distance rate
-
dither rate
-
dosage rate
-
downtime rate
-
drainage rate
-
drawing rate
-
drift rate
-
drilling rate
-
droop rate
-
dry adiabatic lapse rate
-
electricity rate
-
electric rate
-
energy fluence rate
-
energy release rate
-
entropy production rate
-
entropy rate
-
erasing rate
-
erosion rate
-
error rate
-
etching rate
-
etch rate
-
evacuation rate
-
evaporating rate
-
excitation rate
-
exposure rate
-
failure rate
-
failure-per-mile rate
-
false alarm rate
-
fatal accident frequency rate
-
fatality rate
-
fault rate
-
feed rate
-
field germination rate
-
field-repetition rate
-
fieldwide rate of recovery
-
film rate
-
filtering rate
-
finishing rate
-
fire-propagation rate
-
firing rate
-
fission rate
-
flat rate
-
flexible rates
-
flicker rate
-
flooding rate
-
flotation rate
-
flour extraction rate
-
flow rate
-
flush production rate
-
flutter rate
-
forced outgage rate
-
frame rate
-
frame-repetition rate
-
freezing rate
-
freight rate
-
freight-all-kinds rates
-
frequency-sweep rate
-
frequency-tuning rate
-
fuel rate
-
functional throughput rate
-
gas leak rate
-
gathering rate
-
generation rate
-
grinding rate
-
growth rate
-
gyro drift rate
-
half-clock rate
-
hardening rate
-
heat absorption rate
-
heat dissipation rate
-
heat generation rate
-
heat rate
-
heat-flow rate
-
heating rate
-
heat-transfer rate
-
hit rate
-
image refresh rate
-
impact wear rate
-
in-commission rate
-
infiltration rate
-
information rate
-
injection rate
-
instantaneous failure rate
-
intermittent rate
-
ionization rate
-
irrigation rate
-
iso-wear rates
-
job rates
-
kerma rate
-
keying rate
-
lapse rate
-
leakage rate
-
linear wear rate
-
line-of-sight rate
-
line-repetition rate
-
liquid efflux rate
-
lubrication rate
-
maintenance rate
-
mass flow rate
-
mass wear rate
-
maximum efficiency rate
-
maximum permissible rate
-
maximum stepping rate
-
medium rate
-
melting rate
-
melt-off rate
-
metal-removal rate
-
modulation rate
-
moist-adiabatic lapse rate
-
NC programmed feed rate
-
negative flow rate
-
nucleation rate
-
Nyquist rate
-
obturation rate
-
off-peak power rate
-
operating rate
-
optimal feed rate
-
outgassing rate
-
output rate
-
overall drilling rate
-
oxidation rate
-
paging rate
-
peak power rate
-
penetration rate
-
percolation rate
-
phase generation rate
-
phase rate
-
picture-taking rate
-
pitch rate
-
plastic strain rate
-
positive flow rate
-
potential rate of evaporation
-
pouring rate
-
power rate
-
precipitation rate
-
predetermined rate
-
predicted failure rate
-
priming rate
-
printout rate
-
print rate
-
production decline rate
-
production rate
-
projection rate
-
proper feed rate
-
protection rate
-
pull rate
-
pulldown rate
-
pulse-recurrence rate
-
pulse rate
-
radiation rate
-
radioactive decay rate
-
range rate
-
rapid air cut feed rate
-
rapid return rate
-
rate of acceleration
-
rate of angular motion
-
rate of attack
-
rate of blowing
-
rate of braking
-
rate of carbon drop
-
rate of convergence
-
rate of crack propagation
-
rate of deformation
-
rate of dilution
-
rate of discharge
-
rate of dive
-
rate of energy input
-
rate of exchange
-
rate of exposure
-
rate of fall
-
rate of film movement
-
rate of gain
-
rate of hole deviation change
-
rate of lancing
-
rate of linkage
-
rate of loading
-
rate of opening
-
rate of plant depreciation
-
rate of pulse rise
-
rate of rainfall
-
rate of rise
-
rate of roll
-
rate of sedimentation
-
rate of shear
-
rate of slope
-
rate of stirring
-
rate of surface runoff
-
rate or carbon oxidation
-
reactivity insertion rate
-
reading rate
-
read rate
-
recovery rate
-
recycle rate
-
reflood rate
-
refresh rate
-
refrigeration rate
-
repetition rate
-
reset rate
-
residential rate
-
respiration rate
-
retail charter rate
-
retail rate
-
retention rate
-
rigidity rate
-
rolling rate
-
runout rate
-
sample rate
-
saturated-adiabatic lapse rate
-
saturation rate
-
scrap generation rate
-
scrap rate
-
secondary creep rate
-
sectorial rate
-
self-discharge rate
-
setting rate
-
settled production rate
-
settling rate
-
signaling rate
-
silicon pulling rate
-
slew rate
-
snowmelt inflow rate
-
solidification rate
-
sparking rate
-
specific commodity rate
-
specific heat flow rate
-
specific rate of flow
-
specific rate of sediment transport
-
specific wear rate
-
spreading rate of jet
-
spring rate
-
squeeze rate
-
standard rate
-
starting rate
-
steam rate
-
stepping rate
-
stock removal rate
-
strain rate
-
stress rate
-
sub-Nyquist rate
-
success rate
-
superadiabatic lapse rate
-
supply rate
-
survival rate
-
sweep rate
-
taking rate
-
tariff rate
-
temperature lapse rate
-
testing rate
-
thermal transfer rate
-
through rate
-
throughput rate
-
time rate of change
-
time rate
-
time-of-day electricity rate
-
time-of-day rate
-
tool-wear rate
-
total mass rate
-
tracking rate
-
traffic flow rate
-
transfer rate
-
transmission rate
-
transport rate
-
turn rate
-
turnover rate
-
twenty-five ampere rate
-
undetected error rate
-
uniform quench rate
-
unit rate
-
unloading rate
-
update rate
-
vaporizing rate
-
vitrification rate
-
voidage rate
-
voltage recovery rate
-
volume erosion rate
-
volume wear rate
-
volumetric flow rate
-
volumetric rate
-
vulcanization rate
-
water application rate
-
water consumption rate
-
water use rate
-
wear rate
-
weft insertion rate
-
weight rate
-
wheel removal rate
-
wholesale charter rate
-
wholesale rate
-
withdrawal rate
-
write writing rate
-
write rate
-
yawing rate
-
yaw rate
-
zero-crossing rate
- 1
- 2
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