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1 пусковой ток
пусковой ток
-EN
inrush current
transient current associated with energizing of transformers, cables, reactors, etc
[IEV number 448-11-30]
inrush current
Iin
current occurring during the transient period from the moment of switching to the steady-state condition
[IEC 60738-1, ed. 3.0 (2006-04)]
starting current
the steady-state r.m.s. current taken from the line over the starting period from zero speed to load speed with rated voltage and frequency applied
[IEV number 411-48-18]FR
courant d'appel
courant transitoire associé à la mise sous tension des transformateurs, câbles, bobines d'inductance, etc
[IEV number 448-11-30]
courant de démarrage
valeur efficace du courant en régime établi, absorbé par le moteur pendant la période de démarrage de la vitesse nulle jusqu'à la vitesse de charge minimale lorsqu'il est alimenté à la tension et à la fréquence assignées
[IEV number 411-48-18]Тематики
- машины электрические вращающиеся в целом
- электротехника, основные понятия
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > пусковой ток
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2 восстанавливающееся и возвращающееся напряжение
восстанавливающееся и возвращающееся напряжение
Напряжение, появляющееся на выводах полюса коммутационного аппарата или плавкого предохранителя после отключения тока..
Примечания
1 Напряжение можно рассматривать на протяжении двух последовательных интервалов времени, на первом из которых напряжение переходное, а на последующем — промышленной частоты.
2 Определение действительно для однополюсного аппарата. Для многополюсного аппарата — это межфазное напряжение на входных выводах аппаратов.
МЭК 60050(441-17-25)
[ ГОСТ Р 50030. 1-2000 ( МЭК 60947-1-99)]EN
recovery voltage
the voltage which appears across the terminals of a pole of a switching device or a fuse after the breaking of the current
NOTE – This voltage may be considered in two successive intervals of time, one during which a transient voltage exists, followed by a second one during which the power frequency or the steady-state recovery voltage alone exists.
[IEV number 441-17-25]FR
tension de rétablissement
tension qui apparaît entre les bornes d'un appareil de connexion ou d'un fusible après l'interruption du courant
NOTE – Cette tension peut être considérée durant deux intervalles de temps consécutifs, l'un durant lequel existe une tension transitoire, suivi par un second intervalle durant lequel la tension de rétablissement à fréquence industrielle ou en régime établi existe seule.
[IEV number 441-17-25]Тематики
- электротехника, основные понятия
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > восстанавливающееся и возвращающееся напряжение
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3 восстанавливающееся напряжение
восстанавливающееся напряжение
Напряжение, появляющееся на выводах полюса автоматического выключателя после отключения тока.
Примечания
1 Это напряжение можно рассматривать на протяжении двух последовательных интервалов времени, на первом из которых напряжение переходное, а на последующем втором — напряжение промышленной частоты.
2 Это определение действительно для однополюсного выключателя. Для многополюсного выключателя — это напряжение между входными выводами аппарата
(МЭС 441-17-25)
[ ГОСТ Р 50345-99( МЭК 60898-95)]
восстанавливающееся напряжение
-
[Лугинский Я. Н. и др. Англо-русский словарь по электротехнике и электроэнергетике. 2-е издание - М.: РУССО, 1995 - 616 с.]EN
recovery voltage
the voltage which appears across the terminals of a pole of a switching device or a fuse after the breaking of the current
NOTE – This voltage may be considered in two successive intervals of time, one during which a transient voltage exists, followed by a second one during which the power frequency or the steady-state recovery voltage alone exists.
[IEV number 441-17-25]FR
tension de rétablissement
tension qui apparaît entre les bornes d'un appareil de connexion ou d'un fusible après l'interruption du courant
NOTE – Cette tension peut être considérée durant deux intervalles de temps consécutifs, l'un durant lequel existe une tension transitoire, suivi par un second intervalle durant lequel la tension de rétablissement à fréquence industrielle ou en régime établi existe seule
[IEV number 441-17-25]Тематики
- выключатель, переключатель
- высоковольтный аппарат, оборудование...
EN
- cleaning voltage
- recovery voltage
- restoring voltage
- restriking voltage
- transient recovery voltage
- TRV
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > восстанавливающееся напряжение
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4 восстанавливающееся напряжение (для контактора и пускателя)
восстанавливающееся напряжение
Напряжение, появляющееся на выводах полюса автоматического выключателя после отключения тока.
Примечания
1 Это напряжение можно рассматривать на протяжении двух последовательных интервалов времени, на первом из которых напряжение переходное, а на последующем втором — напряжение промышленной частоты.
2 Это определение действительно для однополюсного выключателя. Для многополюсного выключателя — это напряжение между входными выводами аппарата
3 У вакуумного контактора или пускателя наибольшее восстанавливающееся напряжение возможно не на первом отключаемом полюсе
(МЭС 441-17-25)
[ ГОСТ Р 50030.4.1-2002 (МЭК 60947-4-1-2000)]EN
recovery voltage
the voltage which appears across the terminals of a pole of a switching device or a fuse after the breaking of the current
NOTE – This voltage may be considered in two successive intervals of time, one during which a transient voltage exists, followed by a second one during which the power frequency or the steady-state recovery voltage alone exists.
[IEV number 441-17-25]FR
tension de rétablissement
tension qui apparaît entre les bornes d'un appareil de connexion ou d'un fusible après l'interruption du courant
NOTE – Cette tension peut être considérée durant deux intervalles de temps consécutifs, l'un durant lequel existe une tension transitoire, suivi par un second intervalle durant lequel la tension de rétablissement à fréquence industrielle ou en régime établi existe seule
[IEV number 441-17-25]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > восстанавливающееся напряжение (для контактора и пускателя)
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5 длительный допустимый ток
- Strombelastbarkeit, f
- Dauerstrombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Русско-немецкий словарь нормативно-технической терминологии > длительный допустимый ток
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