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1 Oberfläche
f surface; an / unter der Oberfläche auch fig. on / below the surface; ( wieder) an die Oberfläche steigen (re)surface* * *die Oberflächetop; face; surface* * *Ober|flä|chefsurface (auch fig); (TECH, MATH) surface area; (COMPUT) (user) interfacedas Buch bleibt an der Óberfläche (fig) — the book doesn't go very deep
grafische Óberfläche (Comput) — graphical (user) interface
* * *die1) (a surface especially the front surface: a rock face.) face2) (the outside part (of anything): Two-thirds of the earth's surface is covered with water; This road has a very uneven surface.) surface3) (the outward appearance of, or first impression made by, a person or thing: On the surface he seems cold and unfriendly, but he's really a kind person.) surface4) (the upper surface: the table-top.) top* * *Ober·flä·che[ˈo:bɐflɛçə]f1. (äußere Fläche) surface2. (obere Fläche) surfaceauf [o an] der \Oberfläche on the surface* * *die surface; (Flächeninhalt) surface areadie Diskussion blieb zu sehr an der Oberfläche — (fig.) the discussion remained far too superficial
* * *Oberfläche f surface;an/unter der Oberfläche auch fig on/below the surface;* * *die surface; (Flächeninhalt) surface areadie Diskussion blieb zu sehr an der Oberfläche — (fig.) the discussion remained far too superficial
* * *(Mathematik) f.surface n. f.face n.surface n. -
2 Flächeninhalt
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3 Geschossflächenzahl
f Baurecht: floor area ratio, figure indicating the permissible aggregate surface area of all the stor(e)ys in a building in relation to the surface area of the building lot* * *Geschossflächenzahl f Baurecht: floor area ratio, figure indicating the permissible aggregate surface area of all the stor(e)ys in a building in relation to the surface area of the building lot -
4 Fläche
Fläche f 1. WIWI area, surface area; 2. RECHT, GRUND space* * *f <Vw> area, surface area* * *Fläche
plain, level, flat, surface, (Anschlagstelle) site, (Gebiet) area, space;
• bebaute (angebaute) Fläche (Landwirtschaft) enclosed ground, area under cultivation, (Stadt) built-up area;
• ökologisch bewirtschaftete Fläche area of organically farmed land;
• forstwirtschaftlich genutzte Fläche forested land;
• große Fläche field;
• kultivierte Fläche enclosed ground;
• zu Vermietungszwecken zur Verfügung stehende Fläche rental space;
• vermietete Fläche rental space;
• Fläche für Plakatanschlag stand (US). -
5 Flächenausdehnung
f (surface) area* * *Flạ̈|chen|aus|deh|nungfsurface area* * *Flä·chen·aus·deh·nungf surface area* * *Flächenausdehnung f (surface) area -
6 Flächenelement
n <math.phys> (z.B. in der Integralrechnung) ■ unit area; unit surface area -
7 Oberfläche
f <tech.allg> (allg.) ■ surfacef <tech.allg> (Flächenangabe; z.B. in mm² m², km²) ■ surface area -
8 Oberfläche
Oberfläche f surface, face; surface area (größer); superficies (Gelände) • die Oberfläche bearbeiten OB, TE surface • die Oberfläche behandeln 1. OB, TE surface; 2. OB finish • die Oberfläche erneuern reface; resurface (Straße) • eine Oberfläche regulieren TE regulate • eine Oberfläche zurückformen reshape • sich an die Oberfläche anschmiegen BT, OB conform to the surfaceDeutsch-Englisch Fachwörterbuch Architektur und Bauwesen > Oberfläche
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9 Außenfläche
f outer (surface), exterior* * *Au|ßen|flä|chefoutside, outside or exterior surface; (= Flächeninhalt) external surface area* * *Außenfläche f outer (surface), exterior -
10 Innenfläche
f inside surface; der Hand: palm* * *Ịn|nen|flä|chef2) (= Flächeninhalt) internal surface area* * * -
11 aktive Filterfläche
f < verf> ■ specific filter surface area; specific surface area -
12 Filterfläche
f < verf> ■ filtering surface; filter surface area; filter area -
13 spezifische Oberfläche
f < verf> ■ specific filter surface area; specific surface areaGerman-english technical dictionary > spezifische Oberfläche
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14 Oberfläche
f1. face2. surface3. surface area4. top [surface] -
15 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
Немецко-русский словарь нормативно-технической терминологии > Dauerstrombelastbarkeit, f
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16 Strombelastbarkeit, 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
Немецко-русский словарь нормативно-технической терминологии > Strombelastbarkeit, f
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17 Flächeninhalt
m1. area2. surface area3. wing area -
18 aktive Phase
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19 katalytisch aktive Schicht
f did.ugs < chem> ■ catalytic layer; catalytically active surface area; catalytically active surface; catalyst coatingGerman-english technical dictionary > katalytisch aktive Schicht
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20 katalytische Beschichtung
f < chem> ■ catalytic layer; catalytically active surface area; catalytically active surface; catalyst coatingGerman-english technical dictionary > katalytische Beschichtung
См. также в других словарях:
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surface area — paviršiaus plotas statusas T sritis Standartizacija ir metrologija apibrėžtis Nagrinėjamojo paviršiaus plotas. atitikmenys: angl. surface area vok. Oberflächeninhalt, m rus. площадь поверхности, f pranc. aire de surface, f … Penkiakalbis aiškinamasis metrologijos terminų žodynas
surface area — paviršiaus plotas statusas T sritis fizika atitikmenys: angl. surface area vok. Oberflächeninhalt, m rus. площадь поверхности, f pranc. aire de surface, f … Fizikos terminų žodynas
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Surface area, volume, and average depth of oceans and seas — ▪ Table Surface area, volume, and average depth of oceans and seas area volume average depth 000,000 sq km 000,000 sq mi 000,000 cu km 000,000 cu mi m ft Atlantic Ocean without marginal seas 82.440 31.830 324.600 77.900 3,930 12,890 with… … Universalium
surface area — noun The total area on the surface of a three dimensional figure … Wiktionary
