-
1 Elitism
In spite of the national commitment to the principles of Liberty, Equality and Fraternity, France remains marked by traditions of elitism that are ingrained in the very fibre of society. The French Revolution was supposed to have done away with privileges and elites, and usher in an age of greater equality; in the event, it - and subsequent upheavals - changed the nature of the elites in France, without making a great impact on the underlying system. Indeed, the notion of 'republican elites' is one that was fundamental in the shaping of post-Revolutionary France.In terms of local power, the role of local notables - important figures - remains strong. Notables frequently fulfil multiple roles in local administration and structures, sometimes combining these with elected positions on a regional or national scale, giving them and their close supporters a considerable degree of power. (See Cumul des mandats). They are frequently referred to as les elites locales. The process of devolution in France, set in motion in 1982, has had the effect of strengthening the power base of local elites.The French education system, while offering a good quality non-selective education to all children at lower levels, is increasingly elitist towards the top, particularly when it comes to preparing for higher education. Manyclasses préparatoires, particularly those preparing students for entrance to the top institutions of higher education, called Grandes Ecoles, are very selective, and the selection process - and for that matter the system itself - often disfavours students from humble or poorer backgrounds. The Grandes Ecoles themselves, tailor-made to the needs of the nation, train the future leaders and decision makers in specific fields of the public or private sector, producing very close networks of former students, that make the British concept of the "old-boy network" seem rather informal.Places in the top grandes écoles and some other institutions are highly sought after, as graduates from these schools are seen in France as a sort of caste, membership of which is highly recommended, if not essential, for anyone wanting to reach the top. The classic example of this is the ENA, Ecole Normale d'Administration, the Grande Ecole designed to train top civil servants and future political leaders. In the corridors of French power, many if not most of the top positions are occupied by Enarques, graduates of the ENA. In 1967, Jean-Pierre Chevènement - himself an Enarque, and later to be Minister of the Interior under François Mitterrand - coined the word Enarchie, to define the French system of state elites.As for business elites, a 2006 review in the Economist observed that they "often seem to owe more allegiance to the group from which they are drawn than to the international corporations they work for."Dictionnaire Français-Anglais. Agriculture Biologique > Elitism
-
2 courant admissible, m
(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
Франко-русский словарь нормативно-технической терминологии > courant admissible, m
-
3 courant permanent admissible, m
(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
Франко-русский словарь нормативно-технической терминологии > courant permanent admissible, m
См. также в других словарях:
specific — [[t]spɪsɪ̱fɪk[/t]] ♦♦ 1) ADJ GRADED: ADJ n You use specific to refer to a particular fixed area, problem, or subject. Massage may help to increase blood flow to specific areas of the body... There are several specific problems to be dealt with … English dictionary
Needs assessment — is a systematic process for determining and addressing needs, or gaps between current conditions and desired conditions or wants . The discrepancy between the current condition and wanted condition must be measured to appropriately identify the… … Wikipedia
Specific heat capacity — Specific heat capacity, also known simply as specific heat, is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by a certain temperature interval. The term originated primarily through the work … Wikipedia
Specific-Shares Method — A personal financial accounting method that, when used properly, can help reduce capital gains realized for an investor who purchased multiple sets of a stock or mutual fund. In turn, the investor s total tax paid in a given tax year is also… … Investment dictionary
Reading comprehension for special needs — is a modified way of reading to accommodate the specific needs of a child who may suffer from a language impairment. In conjunction with an audiologist, occupational therapist, and special education teachers, a team of caregivers can coordinate… … Wikipedia
special-needs — spe·cial needs or special needs (spĕshʹəl nēdzʹ) adj. Of or relating to people who have specific needs, as those associated with a disability: special needs housing; a special needs teacher * * * … Universalium
Domain-specific modeling — (DSM) is a software engineering methodology for designing and developing systems, such as computer software. It involves systematic use of a domain specific language (DSL) to represent the various facets of a system. DSM languages tend to support … Wikipedia
Supplemental Needs Trust — A Supplemental Needs Trusts is a US specific term for a type of special needs trust (an internationally recognised term). Supplemental needs trusts are compliant with provisions of United States (federal and state) law and are designed to provide … Wikipedia
Maslow's hierarchy of needs — An interpretation of Maslow s hierarchy of needs, represented as a pyramid with the more basic needs at the bottom … Wikipedia
Gender-specific pronoun — A language has gender specific pronouns when personal pronouns have different forms according to the gender of their referents.The English language has three gender specific pronouns in the 3rd. person singular, whose declined forms are also… … Wikipedia
Developmental Needs Meeting Strategy — The Developmental Needs Meeting Strategy (DNMS) is a psychotherapy approach developed by Shirley Jean Schmidt, MA, LPC.[1] It is designed to treat adults with psychological trauma wounds (such as those inflicted by verbal, physical, and sexual… … Wikipedia
