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1 растворенный кислород
растворенный кислород
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
dissolved oxygen
The amount of oxygen dissolved in a stream, river or lake is an indication of the degree of health of the stream and its ability to support a balanced aquatic ecosystem. The oxygen comes from the atmosphere by solution and from photosynthesis of water plants. The maximum amount of oxygen that can be held in solution in a stream is termed the saturation concentration and, as it is a function of temperature, the greater the temperature, the less the saturation amount. The discharge of an organic waste to a stream imposes an oxygen demand on the stream. If there is an excessive amount of organic matter, the oxidation of waste by microorganisms will consume oxygen more rapidly than it can be replenished. When this happens, the dissolved oxygen is depleted and results in the death of the higher forms of life. (Source: PORT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > растворенный кислород
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2 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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3 повышение уровня моря
повышение уровня моря
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
rising sea level
Sea level rises are a possible consequence of global warming. As the amount of free water in the ocean increases, and as the water becomes warmer, global warming will increase. In addition, according to theory, the heating at the poles may reduce the amount of water trapped in glaciers and ice caps. By the year 3000, the seas could rise between one and two metres. Such an event would clearly threaten low-lying areas, particularly in Asia, where million of people live and farm on river deltas and flood plains. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > повышение уровня моря
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4 фактор выброса
фактор выброса
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
emission factor
The relationship between the amount of pollutants produced to the amount of raw materials processed, or fuel consumed, in any polluting process. (Source: TOE)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > фактор выброса
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5 порог чувствительности балансировочного станка по значению дисбаланса
порог чувствительности балансировочного станка по значению дисбаланса
порог чувствительности по дисбалансу
Ндп. разрешающая способность балансировочного станка по дисбалансу
предел чувствительности балансировочного станка
минимальный сигнал
минимально достижимый остаточный дисбаланс
Наименьшее изменение значения дисбаланса, которое может выявить и показать балансировочный станок в заданных условиях.
[ ГОСТ 19534-74]Недопустимые, нерекомендуемые
- минимально достижимый остаточный дисбаланс
- минимальный сигнал
- предел чувствительности балансировочного станка
- разрешающая способность балансировочного станка по дисбалансу
Тематики
Синонимы
EN
DE
FR
67. Порог чувствительности балансировочного станка по значению дисбаланса
Порог чувствительности по дисбалансу
Ндп. Разрешающая способность балансировочного станка по дисбалансу
Предел чувствительности балансировочного станка
Минимально достижимый остаточный дисбаланс
D. Ansprechfahigkeit der Auswuchtmaschine entsprechend der Unwuchtsgrosse
E. Balancing machine minimum response to the amount of unbalance Minimum responce to unbalance
F. Reponse minimale d¢une machine a equilibrer pour la valeur d¢equilibre
Наименьшее изменение значения дисбаланса, которое может выявить и показать балансировочный станок в заданных условиях
Источник: ГОСТ 19534-74: Балансировка вращающихся тел. Термины оригинал документа
Русско-немецкий словарь нормативно-технической терминологии > порог чувствительности балансировочного станка по значению дисбаланса
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6 чувствительность балансировочного станка по значению дисбаланса
чувствительность балансировочного станка по значению дисбаланса
чувствительность по дисбалансу
Отношение изменения показаний индикатора дисбаланса к изменению измеряемого значения дисбаланса.
Примечание
Различают абсолютную SD и относительную SD0 чувствительность
,
где ∆С - изменение показаний индикатора дисбаланса; ∆D - изменение значения дисбаланса; D - значение дисбаланса.
[ ГОСТ 19534-74]Тематики
Синонимы
EN
- balancing machine sensitivity
- balancing machine sensitivity to the amount of unbalance
- sensitivity to unbalance
DE
FR
65. Чувствительность балансировочного станка по значению дисбаланса
Чувствительность по дисбалансу
D. Empfindlichkeit der Unwuchtmaschine
E. Balancing machine sensitivity to the amount of unbalance Sensitivity to unbalance Balancinge machine sensitivity
F. Sensibilite d¢une machine a equilibrer
Отношение изменения показаний индикатора дисбаланса к изменению измеряемого значения дисбаланса.
Примечание. Различают абсолютную SD и относительную SD0 чувствительность
;
,
где ΔС - изменение показаний индикатора дисбаланса; ΔD - изменение значения дисбаланса; D - значение дисбаланса
Источник: ГОСТ 19534-74: Балансировка вращающихся тел. Термины оригинал документа
Русско-немецкий словарь нормативно-технической терминологии > чувствительность балансировочного станка по значению дисбаланса
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7 концентрация загрязняющих веществ
концентрация загрязняющих веществ
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
pollutant concentration
A measure of the amount of a polluting substance in a given amount of water, soil, air, food or other medium. (Source: FFD)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > концентрация загрязняющих веществ
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8 угроза состоянию подземных вод
угроза состоянию подземных вод
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
groundwater endangering
Threat to the quality and quantity of groundwater by activities related to the use of land. As some activities (e.g. landfill) present a particular risk of pollution, the closer an activity is to a well or borehole, the greater the risk of the pumped water being polluted. The type of soil, the geology, the rainfall and the amount of water pumped out of the ground must all be taken into consideration. (Source: PORTa)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > угроза состоянию подземных вод
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9 влажность почвы
влажность почвы
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
soil moisture
1) Water stored in soils.
2) One of the most important elements involved in pedological processes and plant growth. There are three basic forms:
a) water adhering in thin films by molecular attraction to the surface of soil particles and not available for plants is termed hygroscopic water.
b) Water forming thicker films and occupying the smaller pore spaces is termed capillary water. Since it is held against the force of gravity it is permanently available for plant growth and it is this type of soil water which contains plant nutrients in solution.
c) Water in excess of hygroscopic and capillary water is termed gravitational water, which is of a transitory nature because it flows away under the influence of gravity. When the excess has drained away the amount of water retained in the soil is termed its field capacity, when some of its pore spaces are still free of water.
(Source: LANDY / DUNSTE)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > влажность почвы
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10 геотермальная энергия
геотермальная энергия
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
geothermal energy
An energy produced by tapping the earth's internal heat. At present, the only available technologies to do this are those that extract heat from hydrothermal convection systems, where water or steam transfer the heat from the deeper part of the earth to the areas where the energy can be tapped. The amount of pollutants found in geothermal vary from area to area but may contain arsenic, boron, selenium, lead, cadmium, and fluorides. They also may contain hydrogen sulphide, mercury, ammonia, radon, carbon dioxide, and methane. (Source: KOREN)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > геотермальная энергия
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11 дендрохронология
дендрохронология
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
dendrochronology
The science of dating the age of a tree by studying annual growth rings. It is also employed to interpret previous environments and climatic variations by examining certain kinds of trees. It is based on the theory that the width of the growth ring reflects the amount of rainfall and the temperature of the year in which it was formed. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > дендрохронология
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12 допустимая суточная норма потребления
допустимая суточная норма потребления
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
acceptable daily intake
The measurement of the amount of any chemical substance that can be safely consumed by a human being in a day. Calculations are usually based on the maximum level of a substance that can be fed to animals without producing any harmful effects. This is divided by a "safety factor" to allow for the differences between animals and humans and to take account of the variation in human diets. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > допустимая суточная норма потребления
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13 изменение климата как следствие деятельности человека
изменение климата как следствие деятельности человека
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
man-made climate change
Man-made climate changes may be due to the greenhouse effect and other human activities. A change in albedo of the land brought about by desertification and deforestation affects the amount of solar energy absorbed at the earth's surface. Man-made aerosols produced from the sulphur released from power stations can modify clouds. Changes in ozone levels in the stratosphere due to CFCs may influence climate. (Source: WRIGHT)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > изменение климата как следствие деятельности человека
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14 обработка газа
обработка газа
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
treatment of gases
Gas is treated before it can be supplied to the marketplace. The extent to which gas needs to be processed will depend on its quality, the amount of associated impurities such as water, carbon dioxide and sulphur compounds, and the ultimate end-use for the gas. Common gaseous impurities found in natural gas are carbon dioxide and sulphur compounds. Both have an acidic reaction and are given the generic name 'acid gases'. These gases can be removed by a number of commercial processes, using either a physical or a chemical solvent. Physical solvent processes tend to be used where gas pressures are high and for gases with lower levels of propane and heavier hydrocarbons. (Source: SHELL)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > обработка газа
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15 снабжение энергией
снабжение энергией
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
energy supply
The provision and storage of energy (the capacity to do work or produce a change), or the amount of energy stored, for the use of a municipality, or other energy user. (Source: ISEP / FFD)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > снабжение энергией
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16 биологический баланс воды
биологический баланс воды
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
biological water balance
The amount of ingoing and outgoing water in a system, which are assumed to be equal in the long term so that the water budget will balance. (Source: ALL)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > биологический баланс воды
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17 запасы газа
запасы газа
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
gas supply
The provision and storage of any fuel gas, or the amount of any fuel gas stored, for the use of a municipality, or other fuel gas user. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > запасы газа
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18 местное теплоснабжение
местное теплоснабжение
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
local heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a specific local community. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > местное теплоснабжение
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19 обеспечение питьевой водой
обеспечение питьевой водой
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
drinking water supply
The provision and storage of potable water, or the amount of potable water stored, for the use of a municipality, or other potable water user. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > обеспечение питьевой водой
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20 обеспечение теплом
обеспечение теплом
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
heat supply
The provision of heating fuel, coal or other heating source materials, or the amount of heating capacity, for the use of a municipality, or other heat user. (Source: ISEP)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Русско-немецкий словарь нормативно-технической терминологии > обеспечение теплом
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