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1 multiple system
multiple system 1. mehrschleifiges [vermaschtes] System n (Regelungssystem); 2. monopolare Schaltung f (elektrolytische Raffination)English-German dictionary of Electrical Engineering and Electronics > multiple system
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2 multiple-channel system
English-German dictionary of Electrical Engineering and Electronics > multiple-channel system
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3 multiple computing system
multiple computing system Mehrfach-Prozessrechensystem n (auch redundantes System)English-German dictionary of Electrical Engineering and Electronics > multiple computing system
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4 multiple-exchange-rate system
Englisch-Deutsch Fachwörterbuch der Wirtschaft > multiple-exchange-rate system
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5 multiple supplier system
Englisch-Deutsch Fachwörterbuch der Wirtschaft > multiple supplier system
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6 multiple-earthed system
multiple-earthed system genulltes Netz nEnglish-German dictionary of Electrical Engineering and Electronics > multiple-earthed system
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7 multiple-unit steerable aerial system
multiple-unit steerable aerial system Richtantennensystem n mit einstellbarem Strahlungswinkel, Richtantennenanordnung f mit steuerbarem Einfallswinkel (Musa-Antenne)English-German dictionary of Electrical Engineering and Electronics > multiple-unit steerable aerial system
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8 multiple-wire d.c. system
multiple-wire d.c. system Mehrleitergleichstromnetz nEnglish-German dictionary of Electrical Engineering and Electronics > multiple-wire d.c. system
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9 multiple-wire system
multiple-wire system Mehrleitersystem nEnglish-German dictionary of Electrical Engineering and Electronics > multiple-wire system
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10 multiple coat system
English-German dictionary of Architecture and Construction > multiple coat system
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11 multiple-well system
English-German dictionary of Architecture and Construction > multiple-well system
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12 multiple management plan
Englisch-Deutsch Fachwörterbuch der Wirtschaft > multiple management plan
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13 multiple sensor system
< navig> ■ Multi-Sensor-System n (MSS)English-german technical dictionary > multiple sensor system
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14 multiple-degree-of-freedom system
<tech.gen> (e.g. physics, mathematical statistics) ■ System mit mehreren Freiheitsgraden nEnglish-german technical dictionary > multiple-degree-of-freedom system
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15 multiple-earthed system
GB <el> ■ genulltes Netz nEnglish-german technical dictionary > multiple-earthed system
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16 multiple-loop feedback system
<i&c> ■ mehrschleifiger Regelkreis mEnglish-german technical dictionary > multiple-loop feedback system
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17 multiple-loop system
<i&c> ■ vermaschter Regelkreis m ; mehrschleifiger Regelkreis m -
18 process system of accounting
process system of accounting ACC, ECON, EDU Divisionskalkulation f (used in mass production = Massen oder Serienfertigung; synonymous: process costing, process accounting; cf single-step process costing = einstufige Divisionskalkulation, multiple-step process costing = mehrstufige Divisionskalkulation)Englisch-Deutsch Fachwörterbuch der Wirtschaft > process system of accounting
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19 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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20 межсистемная связь (энергосистем)
- Verbund (von Elektrizitätsversorgungssystemen), m
- Verbund
межсистемная связь (энергосистем)
Одна или несколько линий электропередачи, непосредственно соединяющие разные энергосистемы по ГОСТ 21027.
[ ГОСТ 24291-90]EN
interconnection (of electric power systems)
single or multiple transmission link between transmission systems enabling electric power and energy to be exchanged between these networks by means of electric circuits and/or transformers
Source: 601-01-11 MOD
[IEV number 617-03-08]FR
interconnexion (de systèmes d’énergie électrique)
liaison simple ou multiple entre réseaux de transport au moyen de lignes et/ou de transformateurs, permettant des échanges d’énergie entre ces réseaux
Source: 601-01-11 MOD
[IEV number 617-03-08]Тематики
EN
DE
- Verbund
- Verbund (von Elektrizitätsversorgungssystemen), m
FR
- interconnecxion (de reseau)
- interconnexion (de systèmes d’énergie électrique)
68 межсистемная связь (энергосистем)
Одна или несколько линий электропередачи, непосредственно соединяющие разные энергосистемы по ГОСТ 21027
601-01-11*
de Verbund
en interconnection (of power system)
fr interconnecxion (de réseau)
Источник: ГОСТ 24291-90: Электрическая часть электростанции и электрической сети. Термины и определения оригинал документа
Русско-немецкий словарь нормативно-технической терминологии > межсистемная связь (энергосистем)
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