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1 operating table
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2 operating table
table d'opération -
3 operating table
noun table f d'opération -
4 operating
operating ['ɒpəreɪtɪŋ](costs, methods etc) d'exploitation;∎ the factory has reached full operating capacity l'usine a atteint sa pleine capacité de productionAccountancy operating assets actif m d'exploitation;Accountancy operating budget budget m d'exploitation, budget m de fonctionnement;American operating capital capital m d'exploitation, capital m de roulement;Accountancy operating cash flow cash-flow m disponible;Accountancy operating costs frais mpl ou coûts mpl d'exploitation;Accountancy operating costs analysis comptabilité f analytique d'exploitation;Finance operating deficit déficit m d'exploitation;Accountancy operating expenses frais mpl d'exploitation;operating income produits mpl d'exploitation;operating instructions mode m d'emploi;Finance operating leverage levier m d'exploitation;Accountancy & Finance operating loss perte f d'exploitation;Accountancy operating margin marge f (nette) d'exploitation;Accountancy & Finance operating profit bénéfice m d'exploitation;Accountancy operating ratio coefficient m ou ratio m d'exploitation;American operating room salle f d'opération;Finance operating statement compte m ou rapport m d'exploitation;Computing operating system système m d'exploitation;operating table table f d'opération;British operating theatre salle f d'opération -
5 operating
operating [ˈɒpəreɪtɪŋ][cost, deficit, expenses, profit] d'exploitation* * *['ɒpəreɪtɪŋ]adjective [costs] d'exploitation -
6 slab
slab [slæb]* * *[slæb]1) ( piece) (of stone, wood, concrete) dalle f; (of meat, cheese, cake) pavé m; ( of ice) plaque f; ( of chocolate) tablette ffishmonger's slab — étal m de poissonnier
2) (colloq) ( operating table) billard (colloq) m, table f d'opération; ( mortuary table) table f d'autopsie -
7 slab
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8 theatre
1. noun• he is in theatre [patient] il est sur la table d'opération ; [surgeon] il est en salle d'opération2. adjectivea. [programme, ticket] de théâtreb. [staff, nurse] de la salle d'opération3. compounds* * *1.theater US ['θɪətə(r)] noun1) (place, art form) théâtre m also Military2) US ( cinema) cinéma m3) (also lecture theatre) amphithéâtre m4) GB (also operating theatre) salle f d'opération2.noun modifier -
9 theatre
1 noun(a) (building) théâtre m;∎ to go to the theatre aller au théâtre;∎ a night at the theatre une soirée au théâtre∎ Greek/modern theatre le théâtre grec/moderne;∎ Shakespeare's theatre le théâtre de Shakespeare;∎ I've been in the theatre for over thirty years je fais du théâtre depuis plus de trente ans∎ (operating) theatre salle f d'opération;∎ she's in (the) theatre (doctor) elle est en salle d'opération; (patient) elle est sur la table d'opération∎ Military the southern/eastern theatres les fronts mpl du sud/de l'est►► theatre of the absurd théâtre m de l'absurde;theatre bill affiche f de théâtre;theatre company troupe f de théâtre, compagnie f théâtrale;theatre critic critique mf théâtral(e) ou de théâtre;Military theatre of operations théâtre m d'opérations;theatre in the round théâtre m en rond;Medicine theatre sister infirmière f au bloc opératoire;Military theatre of war théâtre m des hostilités;theatre workshop atelier m de théâtre -
10 длительный допустимый ток
- courant permanent admissible, m
- 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
Русско-французский словарь нормативно-технической терминологии > длительный допустимый ток
См. также в других словарях:
operating table — operating .table n a special table in an operating theatre which a person lies on when they are having an operation … Dictionary of contemporary English
operating table — operating tables N COUNT An operating table is a table which a patient in a hospital lies on during a surgical operation … English dictionary
operating table — operating ,table noun count a table that someone lies on while doctors operate on them … Usage of the words and phrases in modern English
operating table — noun table on which the patient lies during a surgical operation • Hypernyms: ↑table * * * operating table noun The narrow table on which the patient lies during a surgical operation • • • Main Entry: ↑operate * * * operating table UK US noun… … Useful english dictionary
Operating table — A 19th century operating table. An operating table, sometimes called operating room table, is the table on which the patient lies during a surgical operation.[1] This surgical equipment is usually found inside the surgery room of a hospit … Wikipedia
operating table — UK / US noun [countable] Word forms operating table : singular operating table plural operating tables a table that someone lies on while doctors operate on them … English dictionary
operating table — table upon which a surgeon operates on his patient … English contemporary dictionary
operating table — noun a table on which a patient is placed during a surgical operation … English new terms dictionary
operating table — noun (C) a special table that you lie on to have a medical operation … Longman dictionary of contemporary English
Operating Department Practitioners — (ODPs) are a type of health care provider involved with the overall planning and delivery of a patient s perioperative care. They are mainly employed in surgical operating departments but can be found in other clinical areas including Accident… … Wikipedia
Operating theater — Inside a contemporary operating room An operating theater (or theatre) was a non sterile, tiered theater or amphitheater in which students and other spectators could watch surgeons perform surgery. Within the Commonwealth nations, the term is… … Wikipedia
