rated insulation voltage

 

напряжение по изоляции
Напряжение, определяемое изготовителем для данного соединителя и его составных частей, с которыми соотносятся испытания на электрическую прочность изоляции, воздушные зазоры и расстояния утечки.
[ ГОСТ Р 51323.1-99]

номинальное напряжение изоляции (соединительного устройства)
-
[IEV number 442-06-39]

EN

rated insulation voltage, (of a connecting device)
phase/neutral or phase/phase voltage value assigned to the connecting device by the manufacturer, this device being intended to be used in installations, the voltage supply of which does not exceed the rated insulation voltage of the connecting device itself
NOTE – Rated insulation voltage is always understood to be between live parts and not between live parts and earth (ground).
[IEV number 442-06-39]

FR

tension d'isolement assignée (d'un dispositif de connexion)
valeur de la tension phase/neutre ou phase/phase assignée par le constructeur du dispositif de connexion, celui-ci étant prévu pour être utilisé dans des installations dont la tension d'alimentation ne dépasse pas la tension d'isolement assignée du dispositif de connexion lui-même
NOTE – La tension d'isolement assignée est toujours comprise comme la tension entre parties sous tension et non entre parties sous tension et terre.
[IEV number 442-06-39]

Тематики

• изделие электроустановочное

EN

• rated insulation voltage, (of a connecting device)

DE

• Bemessungsspannung der Isolierung (eines Verbindungsmaterials)

FR

• tension d'isolement assignée (d'un dispositif de connexion)

 

паспортное напряжение изоляции
-
[IEV number 312-06-02]

EN

rated insulation voltage
working voltage assigned by the manufacturer of the instrument, to characterize its insulation
[IEV number 312-06-02]

FR

tension d'isolement assignée
tension de travail fixée par le constructeur de l’appareil pour caractériser son isolation
[IEV number 312-06-02]

EN

• rated insulation voltage

DE

• Bemessungsspannung der Isolierung

FR

• tension d'isolement assignée

 

рабочее напряжение
Максимальное напряжение, которому подвергается рассматриваемая часть прибора, когда прибор работает при его номинальном напряжении и в условиях нормальной работы.
Примечания.

1. Принимают во внимание различные положения управляющих и коммутационных устройств.
2. Рабочее напряжение учитывает резонансные напряжения.
3. При определении рабочего напряжения не принимают во внимание влияние переходных напряжений.

[ ГОСТ Р 52161. 1-2004 ( МЭК 60335-1: 2001)]

рабочее напряжение
Значение фактического напряжения, подаваемого на действующий электронагреватель.
[ ГОСТ Р МЭК 60050-426-2006]

рабочее напряжение
Наибольшее среднеквадратичное значение напряжения переменного или постоянного тока на любой конкретной изоляции, которое имеет место, когда на оборудование подают номинальное напряжение.
Примечания.

1. Переходные процессы не учитывают.
2. Условия разомкнутой цепи и нормальные рабочие условия принимают во внимание.

[ ГОСТ Р 52319-2005( МЭК 61010-1: 2001)]

рабочее напряжение
Максимальное среднее квадратическое значение постоянного или переменного напряжения на концах изоляционного материала при запитывании выключателя номинальным напряжением.
Примечания
1 Неустойчивостью пренебрегают.
2 Как состояние открытой цепи, так и рабочее состояние не принимают во внимание
[ ГОСТ Р 51324.2.1-99 (МЭК 60669-2-1-96)]

EN

working voltage
highest r.m.s. value of the a.c. or d.c. voltage across any particular insulation which can occur when the equipment is supplied at rated voltage
[IEV number 581-21-19]

---

working voltage
highest r.m.s. value of the AC or DC voltage across any particular insulation which can occur when the equipment is supplied at rated voltage
NOTE 1 – Transients are disregarded.
NOTE 2 – Both open circuit conditions and normal operating conditions are taken into account.
[IEV number 851-12-31]

FR

tension de service
valeur efficace la plus élevée de la tension en courant alternatif ou en courant continu à travers tout isolant particulier, pouvant se produire lorsque le matériel est alimenté à la tension assignée
[IEV number 581-21-19]

---

tension locale
valeur efficace la plus élevée de la tension en courant alternatif ou continu qui peut apparaître à travers n'importe quelle isolation lorsqu'un matériel est alimenté sous la tension assignée
NOTE 1 – Les surtensions transitoires sont négligées.
NOTE 2 – Il est tenu compte à la fois des conditions à vide et des conditions normales de fonctionnement.
[IEV number 851-12-31]

Тематики

• выключатель, переключатель
• изделие электроустановочное
• прибор электрический
• электробезопасность
• электроустановки

EN

• operating potential
• operating voltage
• OV
• running voltage
• service voltage
• working voltage
• WV

DE

• Arbeitsspannung, f

FR

• tension de service
• tension locale

 

(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 I_Z
[ 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

• длительно допустимый ток
• допустимый ток

EN

• ampacity (US)
• continuous current
• continuous current-carrying capacity
• current-carrying capacity

DE

• Dauerstrombelastbarkeit, f
• Strombelastbarkeit, f

FR

• courant admissible, m
• courant permanent admissible, m