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1 изоляционная способность
Русско-английский словарь по строительству и новым строительным технологиям > изоляционная способность
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2 isolatiewaarde
• insulating value -
3 изолирующая способность
1) Engineering: insulating capability, insulating power2) Construction: insulating property, insulating value, insulation property3) Railway term: insulating efficiencyУниверсальный русско-английский словарь > изолирующая способность
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4 изоляционная способность
1) Military: insulating effectiveness, isolating power2) Engineering: insulating power, insulating property, insulating value, insulation propertyУниверсальный русско-английский словарь > изоляционная способность
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5 изоляционные свойства
2) Astronautics: insulation characteristics3) Coolers: insulating value4) Cement: insulating qualitiesУниверсальный русско-английский словарь > изоляционные свойства
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6 способность
ability, capability, capacity, power, property* * *спосо́бность ж.
ability, capability, capacity, powerспосо́бность восстана́вливаться — recoverabilityоблада́ть спосо́бностью, напр. поглоща́ть га́зы — have a capacity for, e. g., absorbing [taking up] gases, have the property of, e. g., absorbing [taking up] gasesспосо́бность преодолева́ть подъё́м авто — hill-climbing ability, hill-climbing capacity, hillclimbing performanceпроявля́ть спосо́бность к … — show the (cap)ability to do … [for doing …]спосо́бность рассла́иваться — segregabilityспосо́бность сме́шиваться — miscibilityвключа́ющая спосо́бность (контактов переключателей, реле и т. п.) — making capacityвя́жущая спосо́бность — cementing [binding] powerспосо́бность дви́гателя к холо́дному за́пуску — cold-starting ability, cold-starting performanceспосо́бность деформа́ции — deformabilityдисперги́рующая спосо́бность — dispersion capacity, ability, dispersive powerдубя́щая спосо́бность — tanning propertyзаде́рживающая спосо́бность — retentivityизбира́тельная спосо́бность — selectivityизлуча́тельная спосо́бность — emissive [radiating] powerизоляцио́нная спосо́бность — insulating valueионизи́рующая спосо́бность — ionizing power, ionizing capacityисправля́ющая спосо́бность телегр. — margin, (printing) rangeспосо́бность к волоче́нию — drawabilityспосо́бность к дли́тельным перегру́зкам — sustained overload capacityспосо́бность к зака́ливанию — hardenabilityкле́ящая спосо́бность — adhesive abilityспосо́бность к прилипа́нию — cohesivenessспосо́бность кра́ски, кро́ющая — riding [covering] power of paintпридава́ть кро́ющую спосо́бность кра́ске — give body to a paintспосо́бность к сжа́тию — compressibilityспосо́бность к уса́дке — shrinkabilityнагру́зочная спосо́бность — load-carrying capacityокисли́тельная спосо́бность — oxidation powerокисли́тельно-восстанови́тельная спосо́бность — redox powerострукту́ривающая спосо́бность ( почвы) — structure-forming capacityотключа́ющая спосо́бность (контактов переключателей, реле и т. п.) — breaking [interrupting] capacityперегру́зочная спосо́бность — overload capacityпроника́ющая спосо́бность — penetrability, penetrating powerпропускна́я спосо́бность — (carrying) capacityпропускна́я спосо́бность водосли́ва — spillway capacityпропускна́я спосо́бность водосли́ва для па́водковых вод — flood-carrying capacity of a spillwayпропускна́я спосо́бность доро́ги — road [traffic] capacityпропускна́я спосо́бность канала́ — canal capacityпропускна́я спосо́бность ста́нции1. ж.-д. terminal capacity2. тлф. traffic-carrying capacityпропускна́я спосо́бность ствола́ горн. — shaft capacityпропускна́я спосо́бность трубы́ — pipe capacityпропускна́я, эксплуатацио́нная спосо́бность ( слов в минуту) телегр. — traffic speed, wpm; traffic-carrying capacity, wpmразреша́ющая спосо́бность — resolving power, resolutionразреша́ющая спосо́бность по а́зимуту — azimuth resolutionразреша́ющая спосо́бность по вре́мени — time resolutionразреша́ющая спосо́бность по да́льности — range resolutionразреша́ющая спосо́бность по углу́ ме́ста — elevation resolutionразреша́ющая спосо́бность по эне́ргии — energy resolutionразреша́ющая спосо́бность счё́тчика и́мпульсов — resolving time of a pulse counterрастворя́ющая спосо́бность — dissolving powerреакцио́нная спосо́бность — reactivityре́жущая спосо́бность — cutabilityсвязу́ющая спосо́бность — binding [cementing] powerсма́зывающая спосо́бность — lubricating power, lubricityсма́чивающая спосо́бность — wetting powerтеплоаккумули́рующая спосо́бность — heat-storage capacityтеплотво́рная спосо́бность — calorific power, calorific valueтеплотво́рная, вы́сшая спосо́бность — high [gross] heat(ing) [calorific] valueтеплотво́рная, ни́зшая спосо́бность — low [net] heat(ing) [calorific] valueуде́рживающая спосо́бность — holding capacityуплотня́ющая спосо́бность — sealing capacityэгализи́рующая спосо́бность — levelling capacityэкстраги́рующая спосо́бность — extractive power, extractivityэмульги́рующая спосо́бность — emulsifying power -
7 коэффициент изоляции
Construction: insulating valueУниверсальный русско-английский словарь > коэффициент изоляции
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8 пропускная способность
1. bandwidthпропускная способность средств ввода-вывода — I/O bandwidth
2. carrying capacityпропускная способность; грузоподъемность — carrying capacity
3. network capacity4. absorbing capacity5. handling capacityнесущая способность; подъемная мощность — lifting capacity
6. off-take capacity7. traffic capacity8. capacityпропускная способность; допустимый ток — current capacity
9. throughput10. delivery valueпоказатель впитывающей способности бумаги — K&N value
низкий; теплотворная способность — low calorific value
11. reception capacityРусско-английский большой базовый словарь > пропускная способность
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9 длительный допустимый ток
(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-английский словарь нормативно-технической терминологии > длительный допустимый ток
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10 "дуговая" неисправность
"дуговая" неисправность
Неисправность, приводящая к возникновению дуги.
[Интент]Параллельные тексты EN-RU
An arc fault occurs when there is a reduction in the dielectric strength of the insulating means (air, in LV switchboards) interposed between two or more conducting elements at different potential.
The arc is generated at the moment when, due to the high ionization of the air, there is a breakdown of the dielectric of the medium and the consequent flow of the current through it.
In an arc fault the highest stresses are of thermal type and proportional to RaI2 owing to the high value taken by the arc resistance Ra; this because the fault current flows in a medium which is always insulating, even if extremely ionized.
Such stresses manifest themselves essentially in the form of:
• high thermal gradients caused by the quick and intense rise in the air temperature;
• high pressure gradients in the form of pressure wave;
• high ionization of the air with consequent reduction of its insulating strength.
Generally speaking, in a LV assembly designed and tested according to the Standard IEC 60439-1 an arc fault is not very likely to occur; however, should it occur, the consequences would be extremely harmful to both the equipment as well as the personnel (see Chapters 2.2 and 2.3).
The causes of an arc fault can be both technical as well as non technical; among the latter the most frequent are the following:
• personnel errors, above all during maintenance operations;
• installation operations not sufficiently accurate;
• inadequate maintenance, above all in the case of severe environmental conditions.
Among the technical causes of an arc fault in a LV assembly the following ones are to be remembered:
• breakdown of the insulation essentially in the proximity of the supports of the busbars and of the plug-in contacts of the withdrawable units (75% of cases);
• overvoltages generating disruptive discharges between the points at minimum clearances (15% of cases);
• constructional defects of the apparatus (10% of cases).
[ABB]К «дуговой» неисправности, относится неисправность, обусловленная уменьшением электрической прочности изолирующей среды (воздуха в НКУ) между двумя или более токоведущими частями, находящимися под разными электрическими потенциалами.
Дуга образуется в тот момент, когда вследствие высокой ионизации воздуха происходит пробой изолирующей среды, вследствие чего через нее начинает протекать электрический ток.
Проявлением дуговой неисправности, является тепловое воздействие, пропорциональное RaI2 и достигающее большого значения вследствие большого сопротивления дуги Ra.
Дело в том, что ток дуги протекает через среду, которая всегда является изолирующей, пусть даже и чрезвычайно ионизированной.
Указанные воздействия очевидны сами по себе особенно в форме:
• теплового градиента температуры, вызванного быстрым и интенсивным подъемом температуры воздуха;
• высоким градиентом давления в форме волны давления;
• высокой ионизацией воздуха с последующим уменьшением электрической прочности.
Вообще говоря, в НКУ, разработанных и испытанных в соответствии с требованиями стандарта МЭК 60439-1 «дуговая» неисправность маловероятна. Однако, если дуга все таки возникнет, ее последствия буду чрезвычайно тяжелыми как для оборудования, так и для персонала (см. п. 2.2 и 2.3).
Причина дуговой неисправности может носить как технический, так и нетехнический характер. Среди последних наиболее часто возникают следующие:
• ошибки персонала, совершаемые главным образом во время технического обслуживания;
• недостаточно аккуратное выполнение монтажа;
• ненадлежащее техническое обслуживание, главным образом при эксплуатации НКУ в тяжелых условиях окружающей среды.
Среди технических причин дуговой неисправности в НКУ необходимо помнить о следующих:
• пробой изоляции, особенно вблизи опор шин и втычных контактов выдвижных частей НКУ (75 % случаев);
• перенапряжения, вызываемые разрушительными электрическими разрядами между точками с минимальными зазорами (15 % случаев);
• конструктивные дефекты аппаратуры (10 % случаев).
[Перевод Интент]Тематики
- НКУ (шкафы, пульты,...)
EN
Русско-английский словарь нормативно-технической терминологии > "дуговая" неисправность
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11 явление электрической дуги
явление электрической дуги
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[Интент]Параллельные тексты EN-RU
Electric arc phenomenon
The electric arc is a phenomenon which takes place as a consequence of a discharge which occurs when the voltage between two points exceeds the insulating strength limit of the interposed gas; then, in the presence of suitable conditions, a plasma is generated which carries the electric current till the opening of the protective device on the supply side.
Gases, which are good insulating means under normal conditions, may become current conductors in consequence of a change in their chemical-physical properties due to a temperature rise or to other external factors.
To understand how an electrical arc originates, reference can be made to what happens when a circuit opens or closes.
During the opening phase of an electric circuit the contacts of the protective device start to separate thus offering to the current a gradually decreasing section; therefore the current meets growing resistance with a consequent rise in the temperature.
As soon as the contacts start to separate, the voltage applied to the circuit exceeds the dielectric strength of the air, causing its perforation through a discharge.
The high temperature causes the ionization of the surrounding air which keeps the current circulating in the form of electrical arc. Besides thermal ionization, there is also an electron emission from the cathode due to the thermionic effect; the ions formed in the gas due to the very high temperature are accelerated by the electric field, strike the cathode, release energy in the collision thus causing a localized heating which generates electron emission.
The electrical arc lasts till the voltage at its ends supplies the energy sufficient to compensate for the quantity of heat dissipated and to maintain the suitable conditions of temperature. If the arc is elongated and cooled, the conditions necessary for its maintenance lack and it extinguishes.
Analogously, an arc can originate also as a consequence of a short-circuit between phases. A short-circuit is a low impedance connection between two conductors at different voltages.
The conducting element which constitutes the low impedance connection (e.g. a metallic tool forgotten on the busbars inside the enclosure, a wrong wiring or a body of an animal entered inside the enclosure), subject to the difference of potential is passed through by a current of generally high value, depending on the characteristics of the circuit.
The flow of the high fault current causes the overheating of the cables or of the circuit busbars, up to the melting of the conductors of lower section; as soon as the conductor melts, analogous conditions to those present during the circuit opening arise. At that point an arc starts which lasts either till the protective devices intervene or till the conditions necessary for its stability subsist.
The electric arc is characterized by an intense ionization of the gaseous means, by reduced drops of the anodic and cathodic voltage (10 V and 40 V respectively), by high or very high current density in the middle of the column (of the order of 102-103 up to 107 A/cm2), by very high temperatures (thousands of °C) always in the middle of the current column and – in low voltage - by a distance between the ends variable from some microns to some centimeters.
[ABB]Явление электрической дуги
Электрическая дуга между двумя электродами в газе представляет собой физическое явление, возникающее в тот момент, когда напряжения между двумя электродами превышает значение электрической прочности изоляции данного газа.
При наличии подходящих условий образуется плазма, по которой протекает электрический ток. Ток будет протекать до тех пор, пока на стороне электропитания не сработает защитное устройство.
Газы, являющиеся хорошим изолятором, при нормальных условиях, могут стать проводником в результате изменения их физико-химических свойств, которые могут произойти вследствие увеличения температуры или в результате воздействия каких-либо иных внешних факторов.
Для того чтобы понять механизм возникновения электрической дуги, следует рассмотреть, что происходит при размыкании или замыкании электрической цепи.
При размыкании электрической цепи контакты защитного устройства начинают расходиться, в результате чего постепенно уменьшается сечение контактной поверхности, через которую протекает ток.
Сопротивление электрической цепи возрастает, что приводит к увеличению температуры.
Как только контакты начнут отходить один от другого, приложенное напряжение превысит электрическую прочность воздуха, что вызовет электрический пробой.
Высокая температура приведет к ионизации воздуха, которая обеспечит протекание электрического тока по проводнику, представляющему собой электрическую дугу. Кроме термической ионизации молекул воздуха происходит также эмиссия электронов с катода, вызванная термоэлектронным эффектом. Образующиеся под воздействием очень высокой температуры ионы ускоряются в электрическом поле и бомбардируют катод. Высвобождающаяся, в результате столкновения энергия, вызывает локальный нагрев, который, в свою очередь, приводит к эмиссии электронов.
Электрическая дуга длится до тех пор, пока напряжение на ее концах обеспечивает поступление энергии, достаточной для компенсации выделяющегося тепла и для сохранения условий поддержания высокой температуры. Если дуга вытягивается и охлаждается, то условия, необходимые для ее поддержания, исчезают и дуга гаснет.
Аналогичным образом возникает дуга в результате короткого замыкания электрической цепи. Короткое замыкание представляет собой низкоомное соединение двух проводников, находящихся под разными потенциалами.
Проводящий элемент с малым сопротивлением, например, металлический инструмент, забытый на шинах внутри комплектного устройства, ошибка в электромонтаже или тело животного, случайно попавшего в комплектное устройство, может соединить элементы, находящиеся под разными потенциалами, в результате чего через низкоомное соединение потечет электрический ток, значение которого определяется параметрами образовавшейся короткозамкнутой цепи.
Протекание большого тока короткого замыкания вызывает перегрев кабелей или шин, который может привести к расплавлению проводников с меньшим сечением. Как только проводник расплавится, возникает ситуация, аналогичная размыканию электрической цепи. Т. е. в момент размыкания возникает дуга, которая длится либо до срабатывания защитного устройства, либо до тех пор, пока существуют условия, обеспечивающие её стабильность.
Электрическая дуга характеризуется интенсивной ионизацией газов, что приводит к падению анодного и катодного напряжений (на 10 и 40 В соответственно), высокой или очень высокой плотностью тока в середине плазменного шнура (от 102-103 до 107 А/см2), очень высокой температурой (сотни градусов Цельсия) всегда в середине плазменного шнура и низкому падению напряжения при расстоянии между концами дуги от нескольких микрон до нескольких сантиметров.
[Перевод Интент]Тематики
- НКУ (шкафы, пульты,...)
EN
Русско-английский словарь нормативно-технической терминологии > явление электрической дуги
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12 unir
v.1 to join (juntar) (pedazos, habitaciones).unió los dos palos con una cuerda he joined o tied the two sticks together with a piece of stringEllos unieron las telas They joined the fabrics.Ellos unieron los equipos They merged the teams.2 to connect, to link (comunicar) (ciudades, terminales, aparatos).El cable une la tubería The wire connects the tubing.3 to combine.en su obra une belleza y técnica her work combines beauty with techniqueunir algo a algo to add something to something4 to draw together, to assemble, to unify.El amor une a las personas Love draws people together.* * *1 (juntar) to unite, join, join together2 (combinar) to combine (a, with)3 (enlazar) to link (a, to)\unirse en matrimonio formal to unite in marriage* * *verbto unite, join, link- unirse- unirse a* * *1. VT1) (=acercar)a) [+ grupos, tendencias, pueblos] to uniteb) [sentimientos] to unitea nuestros dos países los unen muchas más cosas de las que los dividen — there are far more things that unite our two countries than divide them
c) [lazos] to link, bindlos lazos que unen ambos países — the ties that bind o link both countries
2) (=atar) [contrato] to bindcon el periódico me unía un mero contrato — I was bound to the newspaper by nothing more than a simple contract
el jugador ha rescindido el contrato que lo unía al club — the player has terminated the contract binding him to the club
3) (=asociar, agrupar) to combineuniendo los dos nombres resulta un nuevo concepto — a new concept is created by combining the two nouns
el esquí de fondo une dos actividades: montañismo y esquí — cross-country skiing combines two activities: mountaineering and skiing
decidieron unir sus fuerzas para luchar contra el crimen — they decided to join forces in the fight against crime
ha logrado unir su nombre al de los grandes deportistas de este siglo — he has won a place among the great sporting names of this century
5) [+ objetos, piezas] [gen] to join, join together; [con pegamento, celo] to stick together; [con clavos, puntas] to fasten togethervan a tirar el tabique para unir el salón a la cocina — they are going to knock together the lounge and the kitchen
6) (Culin) [+ líquidos] to mix; [+ salsa] to blend7) (Com) [+ compañías, intereses] to merge2.See:* * *1.verbo transitivo1)a) < cables> to join; (con cola, pegamento) to stick... together; < esfuerzos> to combinelos unió en matrimonio — (frml) he joined them in matrimony (frml)
b) sentimientos/intereses to uniteunida sentimentalmente a... — (period) romantically involved with...
c) <características/cualidades/estilos> to combine3) ( fusionar) <empresas/organizaciones> to merge4) < salsa> to mix2.unirse v pron1)a) ( aliarse) personas/colectividades to join togetherse unieron para hacer un frente común — they joined forces o united in a common cause
b) características/cualidades to combine3) ( fusionarse) empresas/organizaciones to merge* * *= aggregate, bridge, connect, join together, link, marry, string, unite, confound, piece together, weld into/together, splice, bundle, pool, band, bind + Nombre + together, knit, knit, federate, conjoin, cement.Ex. You have attempted to aggregate the UDC class number incorrectly.Ex. BLAISE offers a variety of services bridging the cataloguing and information retrieval functions.Ex. Plainly, it is not always the case that there is a connection between farming and spelling, and many other documents can be identified where these subjects are not connected.Ex. A portfolio is a container for holding loose materials, e.g. paintings, drawings, papers, unbound sections of a book, and similar materials, consisting of two covers joined together at the back.Ex. These references operate in a similar fashion whether they are used to link authors' names or subject headings.Ex. At that time OCLC was already going strong, and we tried to find some backing from the State of New York and possibly from the federal government to marry those two systems.Ex. There is no question of stringing together simple concepts in a preferred citation order to produce a single index description of the summarized subject content of a document.Ex. It has become increasingly difficult to unite both categories in one union and demands for a trade union of library employees have been raised.Ex. The confounding of opposites is also common though, again, care has to be taken to see that we do not confound two subjects on which extensive literature exists.Ex. During his stay in Laputa, Captain Gulliver was very impressed by a book-writing machine which produced fragments of sentences which were dictated to scribes and later pieced together.Ex. The Department of Trade and Industry has undergone many changes over the years; it has been split into two separate departments and welded together again.Ex. A filmloop is a short length of film enclosed in a cassette and with the end of the film spliced on to the beginning so that it requires no rewinding.Ex. CD-ROM products that combine, or bundle, related information services will be at the forefront because of their usefulness to end-users.Ex. The results of two studies of the way reference librarians work were pooled to provide an understanding of the important features necessary in software for computerized reference work.Ex. The author advises banding retention policies to focus on a few clear options.Ex. People value the public library highly as an educational and community resource and the library acts as an 'information junction' to bind the community together.Ex. I want to knit that to another Internet format, which is the Web log -- the 'blog'.Ex. I want to knit that to another Internet format, which is the Web log -- the 'blog'.Ex. The usefulness of the many online periodicals and scientific digital libraries that exist today is limited by the inability to federate these resources through a unified interface.Ex. The grotesque is an effect achieved by conjoining disparate framents which do not realistically belong together.Ex. An in-house bulletin may serve to cement firm relationships with the library's personnel.----* conseguir unir = rally.* unir a = tie (to), couple with.* unir esfuerzos = join + hands.* unir fuerzas = join + forces, pool + forces.* unir inextricablemente = interweave.* unir mediante espigas = tenon.* unir mediante hiperenlaces = hotlink [hot-link].* unir mediante mortaja = mortise.* unirse = come together, partner, bond, stand up as + one.* unirse a = ally with, join, hop on, join + Posesivo + ranks.* unirse a una conversación = chime in.* unirse en matrimonio = tie + the knot.* unir sin solapar = butt together.* volverse a unir a = rejoin.* * *1.verbo transitivo1)a) < cables> to join; (con cola, pegamento) to stick... together; < esfuerzos> to combinelos unió en matrimonio — (frml) he joined them in matrimony (frml)
b) sentimientos/intereses to uniteunida sentimentalmente a... — (period) romantically involved with...
c) <características/cualidades/estilos> to combine3) ( fusionar) <empresas/organizaciones> to merge4) < salsa> to mix2.unirse v pron1)a) ( aliarse) personas/colectividades to join togetherse unieron para hacer un frente común — they joined forces o united in a common cause
b) características/cualidades to combine3) ( fusionarse) empresas/organizaciones to merge* * *= aggregate, bridge, connect, join together, link, marry, string, unite, confound, piece together, weld into/together, splice, bundle, pool, band, bind + Nombre + together, knit, knit, federate, conjoin, cement.Ex: You have attempted to aggregate the UDC class number incorrectly.
Ex: BLAISE offers a variety of services bridging the cataloguing and information retrieval functions.Ex: Plainly, it is not always the case that there is a connection between farming and spelling, and many other documents can be identified where these subjects are not connected.Ex: A portfolio is a container for holding loose materials, e.g. paintings, drawings, papers, unbound sections of a book, and similar materials, consisting of two covers joined together at the back.Ex: These references operate in a similar fashion whether they are used to link authors' names or subject headings.Ex: At that time OCLC was already going strong, and we tried to find some backing from the State of New York and possibly from the federal government to marry those two systems.Ex: There is no question of stringing together simple concepts in a preferred citation order to produce a single index description of the summarized subject content of a document.Ex: It has become increasingly difficult to unite both categories in one union and demands for a trade union of library employees have been raised.Ex: The confounding of opposites is also common though, again, care has to be taken to see that we do not confound two subjects on which extensive literature exists.Ex: During his stay in Laputa, Captain Gulliver was very impressed by a book-writing machine which produced fragments of sentences which were dictated to scribes and later pieced together.Ex: The Department of Trade and Industry has undergone many changes over the years; it has been split into two separate departments and welded together again.Ex: A filmloop is a short length of film enclosed in a cassette and with the end of the film spliced on to the beginning so that it requires no rewinding.Ex: CD-ROM products that combine, or bundle, related information services will be at the forefront because of their usefulness to end-users.Ex: The results of two studies of the way reference librarians work were pooled to provide an understanding of the important features necessary in software for computerized reference work.Ex: The author advises banding retention policies to focus on a few clear options.Ex: People value the public library highly as an educational and community resource and the library acts as an 'information junction' to bind the community together.Ex: I want to knit that to another Internet format, which is the Web log -- the 'blog'.Ex: I want to knit that to another Internet format, which is the Web log -- the 'blog'.Ex: The usefulness of the many online periodicals and scientific digital libraries that exist today is limited by the inability to federate these resources through a unified interface.Ex: The grotesque is an effect achieved by conjoining disparate framents which do not realistically belong together.Ex: An in-house bulletin may serve to cement firm relationships with the library's personnel.* conseguir unir = rally.* unir a = tie (to), couple with.* unir esfuerzos = join + hands.* unir fuerzas = join + forces, pool + forces.* unir inextricablemente = interweave.* unir mediante espigas = tenon.* unir mediante hiperenlaces = hotlink [hot-link].* unir mediante mortaja = mortise.* unirse = come together, partner, bond, stand up as + one.* unirse a = ally with, join, hop on, join + Posesivo + ranks.* unirse a una conversación = chime in.* unirse en matrimonio = tie + the knot.* unir sin solapar = butt together.* volverse a unir a = rejoin.* * *unir [I1 ]vtA1«persona»: unió los trozos con un pegamento she stuck the pieces together with glueunió los cables con cinta aislante he joined the wires with insulating tapeha unido dos estilos muy diferentes he has combined two very different stylesunamos nuestros esfuerzos let us combine our efforts2 «sentimientos/intereses» to unitelos unía el deseo de … they were united by their desire to …los une su afición al deporte their love of sport binds them together o acts as a bond between them o unites themel amor que nos une the love which unites usunida sentimentalmente a … ( period); romantically involved with …3 ‹características/cualidades› unir algo A algo to combine sth WITH sthune a su inteligencia una gran madurez he combines intelligence with great maturityB (comunicar) to linkla nueva carretera une los dos pueblos the new road links the two townsel puente aéreo que une las dos ciudades the shuttle service which runs between o links the two citiesC ‹salsa› to mix■ unirseA1 (aliarse) «personas/colectividades» to join togetherse unieron para hacer un frente común they joined forces o united in a common causelos dos países se unieron en una federación the two countries joined together to form a federationse unieron en matrimonio they were married, they were joined in matrimony ( frml)varias empresas se unieron para formar un consorcio several companies joined together o came together o combined to form a consortiumunirse A algo:se unió a nuestra causa he joined our cause2 «características/cualidades» to combineen él se unen la ambición y el orgullo ambition and pride come together o combine in him, he combines ambition with pridea su belleza se une una gran simpatía her beauty is combined with a very likable personalityB (juntarse) «caminos» to converge, meetdonde el tráfico del oeste se une con el del norte where traffic from the west converges with o meets traffic from the north* * *
unir ( conjugate unir) verbo transitivo
1
(con cola, pegamento) to stick … together;
‹ esfuerzos› to combine
unir algo a algo to combine sth with sth
2 ( comunicar) ‹ lugares› to link
3 ( fusionar) ‹empresas/organizaciones› to merge
unirse verbo pronominal
1 ( aliarse) [personas/colectividades] to join together;
2 ( juntarse) [ caminos] to converge, meet
3 ( fusionarse) [empresas/organizaciones] to merge
unir verbo transitivo
1 (cables, conexiones) to join, unite
2 (esfuerzos, intereses) to join
(asociar, fusionar) unieron sus empresas, they merged their companies
3 (comunicar) to link: ese camino une las dos aldeas, that path links the two villages
' unir' also found in these entries:
Spanish:
acercar
- casar
- empalmar
- fundir
- juntar
- ligar
- remachar
- vincular
English:
bond
- cement
- connect
- couple
- join
- join up
- link
- neither
- screw together
- stick together
- unite
- yoke
- amalgamate
- bring
- marry
- reunite
- splice
- unify
* * *♦ vt1. [juntar] [pedazos, piezas, habitaciones] to join;[empresas, estados, facciones] to unite; Informát [archivos] to merge;unió los dos palos con una cuerda he joined o tied the two sticks with a piece of string;debemos unir fuerzas we must combine forcesles une una fuerte amistad they are very close friends, they share a very close friendship;les une su pasión por la música they share a passion for music;los lazos que nos unen the ties that bind us;Formalunir a dos personas en (santo) matrimonio to join two people in (holy) matrimony3. [comunicar] [ciudades, terminales, aparatos] to connect, to link;la línea férrea que une la capital a o [m5] con la costa the railway o US railroad between o which links the capital and the coast4. [combinar] to combine;en su obra une belleza y técnica her work combines beauty with technique;unir algo a algo [añadir] to add sth to sth;a la desinformación hay que unir también el desinterés de la gente in addition to the lack of information, we have to take into account people's lack of interest5. [mezclar] to mix o blend in;una la mantequilla con el azúcar cream together the butter and the sugar* * *v/t1 join2 personas unite3 características combine ( con with)4 ciudades link* * *unir vt1) juntar: to unite, to join, to link2) combinar: to combine, to blend* * *unir vb1. (juntar) to join2. (comunicar) to link3. (relacionar) to unite -
13 pouvoir
pouvoir [puvwaʀ]━━━━━━━━━6. compounds━━━━━━━━━➭ TABLE 331. <a. (permission)━━━━━━━━━━━━━━━━━► Lorsque pouvoir sert à donner la permission de faire quelque chose, il peut se traduire par can ou may ; can est le plus courant et couvre la majorité des cas.━━━━━━━━━━━━━━━━━• maintenant, tu peux aller jouer now you can go and play━━━━━━━━━━━━━━━━━► On emploie can lorsque la permission dépend d'une tierce personne ou d'une autorité ; can étant un verbe défectif, to be able to le remplace aux temps où il ne peut être conjugué.━━━━━━━━━━━━━━━━━• elle ne pourra lui rendre visite qu'une fois par semaine she'll only be able to visit him once a weekb. (demande)━━━━━━━━━━━━━━━━━► Lorsque l'on demande à quelqu'un la permission de faire quelque chose, qu'on lui demande un service ou qu'on lui donne un ordre poli, on utilise can ou la forme plus polie could.━━━━━━━━━━━━━━━━━• est-ce que je peux fermer la fenêtre ? can I shut the window?• puis-je emprunter votre stylo ? could I borrow your pen?• pourrais-je vous parler ? could I have a word with you?• puis-je vous être utile ? can I be of assistance?• tu peux m'ouvrir la porte, s'il te plaît ? can you or could you open the door for me, please?• pourriez-vous nous apporter du thé ? could you bring us some tea?━━━━━━━━━━━━━━━━━► Lorsque pouvoir exprime une possibilité ou une capacité, il se traduit généralement par can ou par to be able to ; can étant un verbe défectif, to be able to le remplace aux temps où il ne peut être conjugué.━━━━━━━━━━━━━━━━━• peut-il venir ? can he come?• ne peut-il pas venir ? can't he come?━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━• tu as pu lui téléphoner ? did you manage to phone him?• j'ai essayé de le joindre, mais je n'ai pas pu I tried to get in touch with him but I didn't manage tod. (probabilité, hypothèse)━━━━━━━━━━━━━━━━━► Lorsque pouvoir exprime une probabilité, une éventualité ou une hypothèse, il se traduit par could ; might implique une plus grande incertitude.━━━━━━━━━━━━━━━━━• il pourrait être italien he could or might be Italian• ça aurait pu être un voleur ! it could or might have been a burglar!► bien + pouvoir• où ai-je bien pu mettre mon stylo ? where on earth can I have put my pen?• qu'est-ce qu'il peut bien faire ? what can he be doing?• il a très bien pu entrer sans qu'on le voie he could very well have come in without anyone seeing him• tu aurais pu me dire ça plus tôt ! you could have told me sooner!f. (souhaits) puisse-t-il guérir rapidement ! let's hope he makes a speedy recovery!• puissiez-vous dire vrai ! let's hope you're right!2. <━━━━━━━━━━━━━━━━━► La probabilité, l'éventualité, l'hypothèse ou le risque sont rendus par may ; might implique une plus grande incertitude.━━━━━━━━━━━━━━━━━3. <• est-ce qu'on peut quelque chose pour lui ? is there anything we can do for him?• que puis-je pour vous ? what can I do for you?• désolé, mais je n'y peux rien I'm sorry, but there's nothing I can do about it• je n'en peux plus (fatigue) I'm worn out ; (énervement) I've had enough ; (désespoir) I can't take it any longer4. <• tu crois qu'il va pleuvoir ? -- ça se pourrait bien do you think it's going to rain? -- it might• il se peut qu'elle vienne she may come► il se pourrait que + subjonctif• il se pourrait bien qu'il pleuve it might or could well rain5. <• le quatrième pouvoir ( = presse) the press• avoir pouvoir de faire qch (autorisation) to have authority to do sth ; (droit) to have the right to do sth6. <* * *
I
1. puvwaʀverbe auxiliaire1) ( être capable de) to be able toje n'en peux plus — (épuisement, exaspération) I've had it (colloq); ( satiété) I'm full (colloq)
2) ( être autorisé à) to be allowed to3) ( avoir le choix de)4) ( avoir l'obligeance de)pourriez-vous me tenir la porte s'il vous plaît? — can ou could you hold the door (open) for me please?
5) ( être susceptible de)puisse cette nouvelle année exaucer vos vœux les plus chers — wishing you everything you could want for the new year
qu'est-ce que cela peut (bien) te faire? — (colloq) what business is it of yours?
on peut toujours espérer — there's no harm in wishing ou hoping
s'il croit que je vais payer il peut toujours attendre — if he thinks I'm going to pay he's got another think coming
2.
je ne peux rien pour vous/contre eux — there's nothing I can do for you/about them
3.
verbe impersonnelc'est inimaginable ce qu'il a pu pleuvoir! — you can't imagine ou wouldn't believe how much it rained!
4.
il se peut verbe pronominal impersonnelil se peut que les prix augmentent en juin — prices may ou might rise in June
‘est-ce que tu viendras ce soir?’ - ‘cela se peut’ — ‘are you coming this evening?’ - ‘I may do’
ça ne se peut pas — (colloq) it's impossible
5.
on ne peut plus locution adverbiale
6.
on ne peut mieux locution adverbiale••
II puvwaʀnom masculin1) ( puissance) power2) ( faculté) ability4) ( autorité) power, authority5) Politique power6) Administration, Droit power•Phrasal Verbs:* * *puvwaʀ1. nm1) (= influence, autorité) powerLe Premier ministre a beaucoup de pouvoir. — The prime minister has a lot of power.
avoir pouvoir de faire (= autorisation) — to have the authority to do, to have authority to do, (= droit) to have the right to do
2) (= dirigeants)2. vb aux1) (= avoir la possibilité de) to be able toJe suis déçu de ne pas pouvoir le faire. — I am disappointed not to be able to do it.
Je ne pourrai pas venir samedi. — I won't be able to come on Saturday., I can't come on Saturday.
Je n'ai pas pu le réparer. — I couldn't repair it., I wasn't able to repair it.
Je peux lui téléphoner si tu veux. — I can phone her if you like.
2) (= avoir la permission de)Vous pouvez aller au cinéma. — You can go to the pictures.
3) (hypothèse)Il a pu avoir un accident. — He may have had an accident., He might have had an accident., He could have had an accident.
Il aurait pu le dire! — He might have said so!, He could have said so!
3. vb impers4. vtJ'ai fait tout ce que j'ai pu. — I did all I could.
Fais ce que tu peux. — Do what you can.
Je n'y peux rien. — I can't do anything about it.
on ne peut; Je me porte on ne peut mieux. — I'm absolutely fine., I couldn't be better.
Elle est on ne peut plus gentille. — She couldn't be nicer., She's as nice as can be.
je n'en peux plus (fatigue) — I'm exhausted, (patience) I can't take any more
* * *I.pouvoir verb table: pouvoirA v aux1 ( être capable de) to be able to; peux-tu soulever cette boîte? can you lift this box?; nous espérons pouvoir partir cette année we hope to be able to go away this year; dès que je pourrai as soon as I can; il ne pourra pas venir he won't be able to come; je suis content que vous ayez pu venir I'm glad you could come; il ne pouvait pas cacher son irritation he couldn't conceal his annoyance; il pourrait mieux faire he could do better; elle aurait pu le faire she could have done it; tu peux/pourrais bien me rendre ce service you can/could at least do this for me; tu ne pouvais pas me le dire tout de suite! why couldn't you have told me ou didn't you tell me that right away?; on ne pourrait mieux dire that's very well put; je n'en peux plus (épuisement, exaspération) I've had it○; ( satiété) I'm full○; ⇒ vieillesse;2 ( être autorisé à) to be allowed to; les élèves ne peuvent pas quitter l'établissement sans autorisation pupils can't ou may not ou are not allowed to leave the school without permission; est-ce que je peux me servir de ta voiture? can I use your car?; puis-je m'asseoir? may I sit down?; est-ce qu'on peut fumer ici? is smoking allowed here?; nous ne pouvons tout de même pas les laisser faire we can't just stand by and do nothing; tu peux toujours essayer you can ou could always try; on peut dire que it can be said that; après ce qui est arrivé on peut se poser des questions after what happened questions are bound to be asked;3 ( avoir le choix de) on peut écrire clef ou clé the word can be written clef or clé; on peut ne pas faire l'accord the agreement is optional; il ne peut pas ne pas accepter he has no option but to accept; il peut être malade après tout ce qu'il a mangé after the amount he ate it's no wonder that he is ill;4 ( avoir l'obligeance de) pourriez-vous me tenir la porte s'il vous plaît? can ou could you hold the door (open) for me please?; si tu pouvais garder la petite, je sortirais un peu if you could keep an eye on the baby, I could go out for a while; peux-tu me dire quelle heure il est s'il te plaît? could you tell me the time please?;5 ( être susceptible de) tout peut arriver anything could happen; cela pourrait arriver à n'importe qui it could happen to anybody; il ne peut pas ne pas gagner he's bound to win; où peut-il bien être? where can he be?; où pouvait-il bien être? where could he be?; que peut-il bien faire? what can he be doing?; tout le monde peut se tromper anyone can make a mistake; puisse cette nouvelle année exaucer vos vœux les plus chers wishing you everything you could want for the new year; puisse-t-il revenir sur sa décision we can only hope that he goes back on his decision; puissiez-vous dire vrai let us hope you are right; rien ne pourra l'arrêter nothing can stop him/her; qu'est-ce que cela peut (bien) te faire? what business is it of yours?; il peut toujours espérer there's no harm in wishing ou hoping; s'il croit que je vais payer ses dettes il peut toujours attendre if he thinks I'm going to pay his debts he's got another think coming; elle pouvait mentir, il l'aimait toujours no matter how much she lied, he still loved her; qu'est-ce qu'il peut y avoir comme monde! what a crowd there is!; qu'est-ce qu'il peut faire froid ici! it's so cold here!; ce qu'il peut être grand! how tall he is!; peux-tu être bête! how silly you can be!B vtr que puis-je pour vous? what can I do for you?; je ne peux rien pour vous/contre eux there's nothing I can do for you/about them; je n'y peux rien I can't do anything about it, there's nothing I can do about it; je fais ce que je peux I'm doing my best; ‘je sais que c'est difficile mais qu'y puis-je?’-‘vous pouvez beaucoup’ ‘I know it's hard, but what can I do?’-‘plenty’.C v impers il peut faire très froid en janvier it can get very cold in January; il pourrait arriver que je parte I could ou might leave; il pouvait être 10 heures it was probably about 10 o'clock; il peut neiger comme il peut faire beau it might snow or it might be fine; c'est inimaginable ce qu'il a pu pleuvoir! you can't imagine ou wouldn't believe how much it rained!; ce qu'il peut pleuvoir en ce moment! it's raining really hard at the moment.D il se peut vpr impers il se peut que les prix augmentent en juin prices may ou might rise in June; il se peut or pourrait que j'accepte leur offre I may ou might accept their offer; se peut-il qu'il m'ait oublié? can he really have forgotten me?; se peut-il que vous ayez fait cela? how could you do such a thing?; ‘est-ce que tu viendras ce soir?’-‘cela se peut’ ‘are you coming this evening?’-‘I may do’; cela se pourrait bien very possibly so; il or cela se pourrait (bien) qu'il soit fâché he might (well) be angry; ça ne se peut pas○ it's impossible.E on ne peut plus loc adv il est on ne peut plus timide he is as shy as can be; c'est on ne peut mieux it couldn't be better; il travaille on ne peut plus sérieusement you couldn't ask for a more conscientious worker; il est on ne peut plus désagréable he's thoroughly unpleasant.qui peut le plus peut le moins if you can do something complicated, you can do something simple; autant que faire se peut as far as possible.II.pouvoir nm1 ( puissance) power; pouvoirs surnaturels supernatural powers; pouvoir blanchissant d'un détergent whitening power of a detergent; pouvoir d'évocation d'un mot evocative power of a word;2 ( faculté) ability; avoir un remarquable pouvoir d'adaptation to be remarkably adaptable; avoir le pouvoir de faire to be able to do;3 ( ascendant) power (sur over); le pouvoir de qn sur qn sb's power over sb; il la tient en son pouvoir he's got her in his power;4 ( autorité) power, authority; n'avoir aucun pouvoir sur qn to have no power over sb; je n'ai pas le pouvoir de décider it's not up to me to decide; il n'est pas en mon pouvoir de prendre une telle décision I'm not the one who decides;5 Pol power; pouvoir absolu/royal absolute/royal power; après 15 ans de pouvoir after 15 years in power; avoir le pouvoir to be in power; exercer le pouvoir to exercise power; prendre le pouvoir to take power; arriver au pouvoir to come to power; se maintenir au pouvoir to stay in power; séparation des pouvoirs separation of powers; en vertu des pouvoirs qui nous sont conférés by reason of ou in exercise of the powers invested in us; avoir tous pouvoirs to have ou exercise all powers; donner tous pouvoir à qn to give sb full powers, to confer full powers on sb; les pleins pouvoirs full powers; le pouvoir en place the government in power;6 Admin, Jur power; déléguer ses pouvoirs à qn to delegate powers to sb; pouvoir par-devant notaire power of attorney; donner pouvoir à qn to give sb a proxy.pouvoir d'achat purchasing power; pouvoir calorifique calorific value; pouvoir exécutif executive power; le pouvoir judiciaire ( corps) the judiciary; pouvoir législatif legislative power; pouvoir séparateur Phys resolving power; pouvoir spirituel spiritual power; pouvoir temporel temporal power; les pouvoirs constitués the powers that be; pouvoirs exceptionnels emergency powers; pouvoirs publics authorities.I[puvwar] nom masculin1. [aptitude, possibilité] poweravoir un grand pouvoir de concentration/de persuasion to have great powers of concentration/persuasionil n'est plus en notre pouvoir de décider de la question we're no longer in a position to decide on this matterje ferai tout ce qui est en mon pouvoir pour t'aider I'll do everything ou all in my power to help you3. POLITIQUEa. [exercice] powerb. [gouvernants] governmenta. [parti élu] to be in power ou officeb. [junte] to be in powerles gens au pouvoir ne connaissent pas nos problèmes those in power ou the powers that be don't understand our difficultiesa. [élus] to take officeb. [dictateur] to seize powerexercer le pouvoir to exercise power, to govern, to rulele pouvoir exécutif executive power, the executivele pouvoir judiciaire judicial power, the judiciaryle pouvoir législatif legislative power, the legislaturele pouvoir local local government, the local authoritiesavoir du pouvoir sur quelqu'un to have power ou influence over somebodypouvoir calorifique (inférieur)/supérieur (net)/gross calorific value————————pouvoirs nom masculin plurieloutrepasser ses pouvoirs to overstep ou to exceed one's authoritya. [administrateur] to have full powers to do somethingb. [architecte, animateur] to have carte blanche to do somethingpouvoirs exceptionnels POLITIQUE special powers (available to the President of the French Republic in an emergency)2. [gouvernants]3. [surnaturels] powersII[puvwar] verbe auxiliaire1. [avoir la possibilité, la capacité de]je peux revenir en France I'm able to ou I can return to Franceje peux vous aider? [généralement, dans un magasin] can I help you?je ne peux pas dormir I'm unable to ou I can't sleeptout le monde ne peut pas le faire/en dire autant! not everybody can do it/say that!le projet ne pourra pas se faire sans sa collaboration the project can't be carried out without her collaborationtu ne peux pas ne pas l'aider you MUST help her, you can't refuse to help her2. [parvenir à] to manage ou to be able toavez-vous pu entrer en contact avec lui? did you succeed in contacting ou manage to contact him?c'est construit de telle manière que l'on ne puisse pas s'échapper it's built in such a way that it's impossible to escape ou as to make escape impossible3. [avoir la permission de]vous pouvez disposer you may ou can go nowsi on ne peut plus plaisanter, maintenant! it's a pretty sad thing if you can't have a laugh anymore![avoir des raisons de]je suis désolé — ça, tu peux (l'être)! (familier) I'm so sorry — so you should be ou and with good reason ou and I should think so too!4. [exprime une éventualité, un doute, un risque]la maladie peut revenir the disease can ou may recurattention, tu pourrais glisser careful, you might ou could slipj'aurais pu l'attendre longtemps, elle n'arrive que demain! I could have waited a long time, she's not coming until tomorrow!après tout, il pourrait bien ne pas avoir menti he may well have been telling the truth after allil pourrait s'agir d'un suicide it could ou may ou might be a suicideil peut arriver que... it may (so) ou can happen that...5. [exprime une approximation]6. [exprime une suggestion, une hypothèse]tu pourrais au moins t'excuser! you could at least apologize!, the least you could do is (to) apologize!il aurait pu me prévenir! he could've ou might've warned me!7. [en intensif]qu'a-t-elle (bien) pu leur dire pour les mettre dans cet état? what can she possibly have said for them to be in such a state!8. (littéraire) [exprime le souhait]————————[puvwar] verbe transitif[être capable de faire]on n'y peut rien it can't be helped, nothing can be done about itj'ai fait tout ce que j'ai pu I did my level best ou all I coulda. [physiquement] I'm exhaustedb. [moralement] I can't take anymore ou stand it any longerc. [je suis rassasié] I'm full (up)je n'en peux plus de l'entendre se plaindre sans cesse I just can't take his continual moaning any moreregarde-le danser avec elle, il n'en peut plus! (familier & humoristique) just look at him dancing with her, he's in seventh heaven!————————se pouvoir verbe impersonnelça se peut it may ou could beça se peut, mais... that's as may be, but...sois calme, et s'il se peut, diplomate keep calm and, if (at all) possible, be tactfulil se pourrait bien qu'il n'y ait plus de places it might ou could well be fully booked -
14 действие электрической дуги, возникающей внутри НКУ распределения и управления
действие электрической дуги, возникающей внутри НКУ распределения и управления
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[Интент]Параллельные тексты EN-RU
Effects of the electric arc inside switchgear and controlgear assemblies
In the proximity of the main boards, i.e. in the proximity of big electrical machines, such as transformers or generators, the short-circuit power is high and consequently also the energy associated with the electrical arc due to a fault is high.
Without going into complex mathematical descriptions of this phenomenon, the first instants of arc formation inside a cubicle can be schematized in 4 phases:
1. compression phase: in this phase the volume of the air where the arc develops is overheated owing to the continuous release of energy; due to convection and radiation the remaining volume of air inside the cubicle warms up; initially there are temperature and pressure values different from one zone to another;
2. expansion phase: from the first instants of internal pressure increase a hole is formed through which the overheated air begins to go out. In this phase the pressure reaches its maximum value and starts to decrease owing to the release of hot air;
3. emission phase: in this phase, due to the continuous contribution of energy by the arc, nearly all the air is forced out under a soft and almost constant overpressure;
4. thermal phase: after the expulsion of the air, the temperature inside the switchgear reaches almost that of the electrical arc, thus beginning this final phase which lasts till the arc is quenched, when all the metals and the insulating materials coming into contact undergo erosion with production of gases, fumes and molten material particles.
Should the electrical arc occur in open configurations, some of the described phases could not be present or could have less effect; however, there shall be a pressure wave and a rise in the temperature of the zones surrounding the arc.
Being in the proximity of an electrical arc is quite dangerous; here are some data to understand how dangerous it is:
• pressure: at a distance of 60 cm from an electrical arc associated with a 20 kA arcing fault a person can be subject to a force of 225 kg; moreover, the sudden pressure wave may cause permanent injuries to the eardrum;
• arc temperatures: about 7000-8000 °C;
• sound: electrical arc sound levels can reach 160 db, a shotgun blast only 130 db.
[ABB]Действие электрической дуги, возникающей внутри НКУ распределения и управления
Короткое замыкание вблизи больших силовых устройств, таких как трансформаторы или генераторы имеет очень большую мощность. Поэтому энергия электрической дуги, возникшей в результате короткого замыкания, очень большая.
Не вдаваясь в сложное математическое описание данного явления, можно сказать, что первые мгновения формирования дуги внутри шкафа можно упрощенно разделить на четыре этапа:
1. Этап сжатия: на этом этапе объем воздуха, в котором происходит зарождение дуги перегревается вследствие непрерывного высвобождения энергии. За счет конвекции и излучения оставшийся объем воздуха внутри шкафа нагревается. На этом начальном этапе значения температуры и давления воздуха в разных зонах НКУ разные.
2. Этап расширения: с первых мгновений внутреннее давление создает канал, через который начинается движение перегретого воздуха. На этом этапе давление достигает своего максимального значения, после чего начинает уменьшаться вследствие выхода горячего воздуха.
3. Этап эмиссии: на этом этапе вследствие непрерывного пополнения энергией дуги почти весь воздух выталкивается под действием мягкого и почти постоянного избыточного давления.
4. Термический этап: после выхлопа воздуха температура внутри НКУ почти достигает температуры электрической дуги. Так начинается заключительный этап, который длится до тех пор, пока дуга не погаснет. При этом все металлические и изоляционные материалы, вступившие в контакт с дугой, оказываются подвергнутыми эрозии с выделением газов, дыма и частиц расплавленного материала.
Если электрическая дуга возникнет в открытом НКУ, то некоторые из описанных этапов могут не присутствовать или могут иметь меньшее воздействие. Тем не менее будет иметь место воздушная волна и подъем температуры вблизи дуги.
Находиться вблизи электрической дуги довольно опасно. Ниже приведены некоторые сведения, помогающие осознать эту опасность:
• давление: На расстоянии 60 см от электрической дуги, вызванной током короткого замыкания 20 кА, человек может подвергнуться воздействию силы 225 кг. Более того, резкая волна давления может нанести тяжелую травму барабанным перепонкам;
• температура дуги: около 7000-8000 °C;
• шумовое воздействие: Уровень шумового воздействия электрической дуги может достигнуть 160 дБ (выстрел из дробовика – 130 дБ).
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Русско-английский словарь нормативно-технической терминологии > действие электрической дуги, возникающей внутри НКУ распределения и управления
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