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1 кронштейн
mFRA support mDEU Halter m für FaltenbalgENG support-bracketITA supporto mPLN wspornik m wieszakaRUS кронштейн mсм. поз. 1452 на,
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—FRA support m de porte-bagagesDEU Träger m für GepäckablageITA sostegno m del portabagagliPLN wspornik m półki bagażowejRUS кронштейн m багажной полкисм. поз. 1753 на
кронштейн вертикального рычага
—FRA point m fixe des balanciers d’essieuxDEU Festpunktbock m für BremshebelITA punto m fisso delle leve verticaliPLN wspornik m dźwigni przyosiowychRUS кронштейн m вертикального рычагасм. поз. 529 на
—FRA support-guide mDEU Rollengehäuse nITA supporto-guida mPLN wieszak m prowadny rolkowyRUS кронштейн m дверного роликасм. поз. 1084 на
кронштейн для сигналов с креплением
—FRA porte-signal m à crochetDEU Signalstütze fENG signal hookITA portasegnale m a gancioPLN wspornik m sygnałowy zdejmowany, utwierdzanyRUS кронштейн m для сигналов с креплениемсм. поз. 2909 на
кронштейн для сигналов, дополнительный
—FRA porte-signal m amovibleDEU Signalstütze f, abnehmbareITA portasegnale m amovibilePLN wspornik m sygnałowy zdejmowanyRUS кронштейн m для сигналов, дополнительныйсм. поз. 2908 на—FRA console f de caisseDEU Kastenstütze fITA mensola f di cassaPLN wspornik m obwodzinyRUS кронштейн m кузовасм. поз. 374 на
кронштейн нагревательных элементов
—FRA support m de résistanceDEU Träger m für StabheizkörperITA supporto m delle resistenzePLN wspornik m elementów grzejnychRUS кронштейн m нагревательных элементовсм. поз. 2344 на
—FRA tenon m d’articulationDEU Lager n für Bügel mENG hinge pinITA supporto m d'articolazionePLN wspornik m ogranicznikaRUS кронштейн m ограничителясм. поз. 2060 на
—FRA support m d’articulation de consoleDEU Lager m für Stütze fITA supporto m d'articolazione della mensolaPLN podstawa f wspornika stolikaRUS кронштейн m откидного столикасм. поз. 1768 на
кронштейн откидной спинки дивана
—FRA béquille fDEU Stütze fENG braceITA puntello mPLN podpórka f oparciaRUS кронштейн m откидной спинки диванасм. поз. 1764 на—FRA équerre f de fixationDEU Befestigungswinkel mENG angle-ironITA squadra f di fissaggioPLN kątownik m zawieszeniaRUS кронштейн m подвескисм. поз. 2316 на
—FRA support m de dynamoDEU Generatorträger mENG dynamo supportITA supporto m del generatorePLN wspornik m prądnicyRUS кронштейн m подвески генераторасм. поз. 2018 на
кронштейн подвески тормозной колодки
—FRA support m des bielles de suspension de sabotITA supporto m dei pendini di sospensione dello zoccoloPLN wspornik m wieszaków klocka hamulcowegoRUS кронштейн m подвески тормозной колодкисм. поз. 531 на
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, кронштейн подвески тормозной передачи
—FRA support m des bielles de suspension de timonerie de freinITA supporto m dei pendini di sospensione della timoneriaPLN wspornik m wieszaków przekładni hamulcowejRUS кронштейн m подвески тормозной передачисм. поз. 540 на—FRA support m de la tige de guidageDEU Festpunktbock m für SpurstangeITA supporto m dell'asta di guidaPLN wspornik m łącznika poprzecznegoRUS кронштейн m поперечной тягисм. поз. 283 на
—FRA console f de caisseDEU Kastenstütze fITA mensola f di cassaRUS кронштейн m стойки кузовасм. поз. 891 на
—FRA support m de l’arbre de renvoiITA supporto m della leva a campanellaPLN wspornik m dźwigni kątowejRUS кронштейн m тормозного валасм. поз. 587 на
—FRA support-butée m de la vis de freinDEU Halslager nITA supporto m della vite del frenoRUS кронштейн m тормозного винтасм. поз. 580 на—DEU Festpunktbock m für BremsgehängeITA punto m fisso della timoneria del frenoPLN wspornik m przekładni hamulcowejRUS кронштейн m тормозной передачисм. поз. 539 на—FRA étrier-support mDEU Bügel m für TürpufferENG stirrup supportITA staffa-supporto fPLN kabłąk m odbijakaRUS кронштейн m упорасм. поз. 1257 на
—FRA support m de lame élastiqueDEU Festpunktbock m für Achslenker mITA supporto m di lama elasticaPLN wspornik m łącznika sprężystegoRUS кронштейн m фиксатора буксысм. поз. 276 на
кронштейн, верхний
—FRA support m supérieurDEU Türlager n, oberesENG top bracketITA supporto m superiorePLN wspornik m górnyRUS кронштейн m, верхнийсм. поз. 1215 на
кронштейн, направляющий
—FRA support m d’articulation de la bielle d’asservissementDEU Anlehkplatte f für ParallelführungITA supporto m d'articolazione della biella di guidaPLN wspornik m łącznikaRUS кронштейн m, направляющийсм. поз. 1212 накронштейн, откидной
—FRA support m articuléDEU Auflager mENG hinged bracketITA supporto m articolatoPLN wspornik m odchylnyRUS кронштейн m, откиднойсм. поз. 1759 на -
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
, 
См. также в других словарях:
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operating table — table upon which a surgeon operates on his patient … English contemporary dictionary
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