-
1 классификация землепользования
классификация землепользования
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
land use classification
The arrangement of land units into a variety of categories based on the properties of the land or its suitability for a particular purpose. It has become an important tool in rural land-resource planning. (Source: WHIT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > классификация землепользования
-
2 влияние климата
влияние климата
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
climatic effect
Climate has a central influence on many human needs and activities, such as agriculture, housing, human health, water resources, and energy use. The influence of climate on vegetation and soil type is so strong that the earliest climate classification schemes where often based more on these factors than on the meteorological variables. While technology can be used to mitigate the effects of unfavorable climatic conditions, climate fluctuations that result in significant departures from normal cause serious problems for modern industrialized societies as much as for primitive ones. The goals of climatology are to provide a comprehensive description of the Earth's climate, to understand its features in terms of fundamental physical principles, and to develop models of the Earth's climate that will allow the prediction of future changes that may result from natural and human causes. (Source: PARCOR)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > влияние климата
-
3 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
-
4 расчет дисперсии
расчет дисперсии
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
dispersion calculation
The calculation of pollutant dispersion is based on the use of air dispersion models that mathematically simulate atmospheric conditions and behaviour. Dispersion models can provide concentration or deposition estimates and can be used to evaluate both existing and hypothetical emissions scenarios. (Source: ENVAR)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > расчет дисперсии
-
5 экоразвитие
экоразвитие
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
ecodevelopment
1) Conservative development based on long term optimization of biosphere resources.
2) An approach to development through rational use of natural resources by means of appropriate technology and system of production which take into account and provide for the conservation of nature.
(Source: GREMES / UNUN)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > экоразвитие
-
6 энергия прилива
энергия прилива
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
tidal power
Mechanical power, which may be converted to electrical power, generated by the rise and fall of ocean tides. The possibilities of utilizing tidal power have been studied for many generations, but the only feasible schemes devised so far are based on the use of one or more tidal basins, separated from the sea by dams (known as barrages), and of hydraulic turbines through which water passes on its way between the basins and the sea. (Source: ALL)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > энергия прилива
См. также в других словарях:
Use of Free and Open Source Software (FOSS) in the U.S. Department of Defense — is a 2003 report by The MITRE Corporation that documented widespread use of and reliance on free software (termed FOSS ) within the United States Department of Defense (DoD). The report helped end a debate about whether FOSS should be banned from … Wikipedia
Use of webcams — at work and home has become a world wide web cultural revolution or change in how we communicate with each other. It can be broken down into positve, negative, freedom of expression or speech and what the future of webcam internet technology may… … Wikipedia
based — 1. based on. To base one thing on another is to use the second as the basis for the first, and it is frequently used in the passive, as in arguments based on statistics. Avoid using based on as an unattached conjunction without a clear antecedent … Modern English usage
Use of Beads at Prayers — Use of Beads at Prayers † Catholic Encyclopedia ► Use of Beads at Prayers Beads variously strung together, according to the kind, order, and number of prayers in certain forms of devotion, are in common use among Catholics as an… … Catholic encyclopedia
use value — n: value of property based on its use rather than on the market use value of agricultural land Merriam Webster’s Dictionary of Law. Merriam Webster. 1996 … Law dictionary
Use It Up and Wear It Out — was a popular single by Odyssey.Written by Sandy Linzer and L Russel Brown and produced by Linzer it was the New York based disco groups sole UK #1 single, spending two weeks at the top in July 1980. The most successful of the acts six UK hit… … Wikipedia
Use case — A use case is a description of a system’s behaviour as it responds to a request that originates from outside of that system.The use case technique is used in software and systems engineering to capture the functional requirements of a system. Use … Wikipedia
Use-define chain — A Use Definition Chain (UD Chain) is a data structure that consists of a use, U, of a variable, and all the definitions, D, of that variable that can reach that use without any other intervening definitions. A definition can have many forms, but… … Wikipedia
Use of courtesy titles and honorifics in professional writing — The use of honorifics (Mr, Mrs, Miss, Ms.) and styles (HRH, His Holiness, etc.) differs greatly among publications in both journalism and academia. The differences are based on tradition, practical concerns (such as space), and cultural norms.… … Wikipedia
Use–mention distinction — The use–mention distinction (sometimes referred to as the words as words distinction) is the distinction between using a word (or phrase) and mentioning it. For example, the following two sentences illustrate use and mention of the word cheese… … Wikipedia
Use of social network websites in investigations — Social network services are increasingly being used in legal and criminal investigations. Information posted on sites such as MySpace and Facebook has been used by police and university officials to prosecute users of said sites. In some… … Wikipedia