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1 maximum value
English-German dictionary of Electrical Engineering and Electronics > maximum value
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2 maximum value
English-German dictionary of Architecture and Construction > maximum value
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3 maximum value
<tech.gen> ■ Größtwert m -
4 maximum value
n.Maximalwert m. -
5 nominal maximum value
nominal maximum value nomineller Höchstwert mEnglish-German dictionary of Electrical Engineering and Electronics > nominal maximum value
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6 maximum scale value
English-German dictionary of Electrical Engineering and Electronics > maximum scale value
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7 maximum permissible value
<tech.gen> ■ Grenzwert mEnglish-german technical dictionary > maximum permissible value
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8 maximum scale value
<i&c> (the full-deflection figure of an instrument scale) ■ Skalenendwert m -
9 MAC value
English-German dictionary of Electrical Engineering and Electronics > MAC value
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10 highest value
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11 peak value
<tech.gen> ■ Scheitelwert m ; Spitzenwert m<el> ■ Scheitelwert m -
12 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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13 предельное значение тока несрабатывания при неравномерной нагрузке в многофазной цепи
- Grenzwert der Nichtbetätigungs-Überstromstärke bei unsymmetrischen Lasten in einem Mehrphasen-Stromkreis
предельное значение тока несрабатывания при неравномерной нагрузке в многофазной цепи
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[IEV number 442-05-63]EN
limiting value of the non-operating current in case of unbalanced load in a multiphase circuit
Maximum value of current which, in the absence of any fault to frame or to earth, and of an earth leakage current, can flow in a circuit containing only two active conductors of the installation, without causing operation of the part of the residual current device performing the evaluation.
[IEV number 442-05-63]FR
valeur limite du courant de non-fonctionnement en service déséquilibré dans un circuit polyphasé
Valeur maximale du courant pouvant circuler, en l'absence de tout défaut à la masse ou à la terre et de tout courant de fuite à la terre, dans un circuit intéressant seulement deux conducteurs actifs de l'installation sans provoquer le fonctionnement de la partie du dispositif de coupure différentiel assurant la fonction mesure.
[IEV number 442-05-63]EN
- limiting value of the non-operating current in case of unbalanced load in a multiphase circuit
DE
- Grenzwert der Nichtbetätigungs-Überstromstärke bei unsymmetrischen Lasten in einem Mehrphasen-Stromkreis
FR
- valeur limite du courant de non-fonctionnement en service déséquilibré dans un circuit polyphasé
Русско-немецкий словарь нормативно-технической терминологии > предельное значение тока несрабатывания при неравномерной нагрузке в многофазной цепи
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14 предельное значение тока несрабатывания при равномерной нагрузке
предельное значение тока несрабатывания при равномерной нагрузке
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[IEV number 442-05-64]EN
limiting value of the non-operating current in case of balanced load
Maximum value of current which, in the absence of any fault to frame or to earth, and of an earth leakage current, can flow in a circuit without any load unbalance, without causing operation of the part of the residual current device performing the evaluation.
[IEV number 442-05-64]FR
valeur limite du courant de non-fonctionnement en service équilibré
Valeur maximale du courant pouvant circuler dans un circuit, en l'absence de tout défaut à la masse ou à la terre et de tout courant de fuite à la terre en l'absence de tout déséquilibre de charge, sans provoquer le fonctionnement de la partie du dispositif de coupure différentiel assurant la fonction mesure.
[IEV number 442-05-64]EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > предельное значение тока несрабатывания при равномерной нагрузке
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15 абсолютный разброс электрического реле
абсолютный разброс электрического реле
Максимальная разница между любыми значениями, измеренными в одинаковых установленных условиях для данного электрического реле и для заданного числа проверок
[ ГОСТ 16022-83]EN
consistency
for a given relay, the maximum value to be expected with a given confidence level, of the difference between any two measured values determined under identical specified conditions
[IEV number 446-18-08]FR
fidélité
pour un relais et pour un niveau de confiance donnés, écart maximal à craindre entre deux quelconques des valeurs mesurées dans des conditions spécifiées identiques
[IEV number 446-18-08]Тематики
EN
DE
FR
146. Абсолютный разброс электрического реле
D. Vertrauensbereich des Fehlers
E. Consistency
F. Fidélité
Максимальная разница между любыми значениями, измеренными в одинаковых установленных условиях для данного электрического реле и для заданного числа проверок
Источник: ГОСТ 16022-83: Реле электрические. Термины и определения оригинал документа
Русско-немецкий словарь нормативно-технической терминологии > абсолютный разброс электрического реле
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16 допустимое напряжение прикосновения
допустимое напряжение прикосновения
Максимальное значение ожидаемого напряжения прикосновения, продолжительность воздействия которого не ограничивается при определенных внешних условиях.
[ ГОСТ Р МЭК 60050-195-2005]
[ ГОСТ Р МЭК 60050-826-2009]EN
conventional touch voltage limit
maximum value of the prospective touch voltage which is permitted to be maintained indefinitely in specified conditions of external influences
Source: 826-02-04 MOD
[IEV number 195-05-10]FR
tension limite conventionnelle de contact
valeur maximale de la tension de contact présumée qu'il est admis de pouvoir maintenir indéfiniment dans des conditions d'influences externes spécifiées
Source: 826-02-04 MOD
[IEV number 195-05-10]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > допустимое напряжение прикосновения
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17 критическое сопротивление
критическое сопротивление
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[IEV number 312-06-01]EN
critical resistance
maximum value of resistance which, when connected across the terminals of a permanent-magnet moving-coil element, causes its movement to be aperiodic
[IEV number 312-06-01]FR
résistance critique
valeur maximale de la résistance qui, connectée aux bornes d'un élément magnétoélectrique, rend son mouvement apériodique
[IEV number 312-06-01]Тематики
- измерение электр. величин в целом
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > критическое сопротивление
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18 порог отпускания
порог отпускания
Максимальное значение электрического тока, проходящего через тело человека, когда человек может освободиться самостоятельно.
[ ГОСТ Р МЭК 60050-195-2005]EN
let-go threshold (current)
maximum value of electric current through the body of a person at which that person can release himself or herself
Source: 604-04-23 MOD, 891-02-69 MOD
[IEV number 195-03-09]FR
limite de lâcher
valeur maximale du courant électrique passant dans le corps d'une personne, à laquelle cette personne peut se libérer d'elle-même
Source: 604-04-23 MOD, 891-02-69 MOD
[IEV number 195-03-09]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > порог отпускания
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19 сверхток несрабатывания в главной цепи
сверхток несрабатывания в главной цепи
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[IEV number 442-05-62]EN
non-operating overcurrent in the main circuit
Maximum value of current which can flow in the main circuit, in the absence of residual current, without causing operation of the detecting device of the residual current device as a consequence of asymmetry existing in the detecting device itself.
[IEV number 442-05-62]FR
surintensité de non-fonctionnement dans le circuit principal
Valeur maximale du courant pouvant circuler dans le circuit principal, en l'absence de courant différentiel résiduel, sans que le dispositif de détection du dispositif de coupure différentiel ne fonctionne en raison de la dissymétrie existant dans le dispositif de détection lui-même.
[IEV number 442-05-62]EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > сверхток несрабатывания в главной цепи
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20 характеристика I2t коммутационного устройства
характеристика I2t коммутационного устройства
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[IEV number 442-05-59]EN
I2t characteristic of a switching device
a curve giving the maximum value of I2t as a function of the prospective current under stated conditions of operation
[IEV number 442-05-59]FR
caractéristique I2t d'un dispositif de coupure
courbe donnant les valeurs maximales de I2t en fonction du courant présumé dans des conditions spécifiées de fonctionnement
[IEV number 442-05-59]Тематики
- аппарат, изделие, устройство...
- выключатель, переключатель
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > характеристика I2t коммутационного устройства
См. также в других словарях:
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