GBK glossarySearch the glossaries created from glossary-building KudoZ (GBK) questions. | To see the desired glossary, please select the language and then the field of expertise. |
Home - Russian
- Electronics / Elect Eng
- Search
- Term
- допустимая токовая нагрузка в амперах
- Electronics / Elect Eng - by Enrique Cavalitto
- Definition(s)
- Определяет допустимый тока для проводника, при которой его нагрев не превышает заданной величины. Own research - by Yuriy Vassilenko
- Example sentence(s)
- Токовые нагрузки проводов и кабелей расчитываются (это достаточно сложный расчет термодинамического процесса) исходя из температуры на поверхности жилы. Ограничением для тока протекающего по жиле служит температура, при которой материал изоляции начинает разрушаться. Например, для кабелей с пластмассовой изоляцией расчетной температурой принимают 60°С. Наши кабели имеют изоляцию существенно более термостойкую чем обычные кабели с пластмассовой изоляцией. Поэтому, на первый взгляд могут выдерживать существенно большие нагрузочные токи. Это справедливо только для нормальных температурных условий (+25°С), при высоких температурах изоляция подвергается двустороннему воздействию - со стороны окружающей среды и со стороны нагреваемой протекающим током жилы. В свою очередь, сопротивление жилы при высоких температурах тоже повышается, следовательно еще больше повышается ее нагрев за счет протекающего по ней тока.
В итоге, при высоких температурах нагрузочная способность кабелей сильно падает. - Энерготерм — информа� by Yuriy Vassilenko
- Related KudoZ question
Compare [close] Compare [close] - English
- Electronics / Elect Eng
- Search
- Term
- Electronics / Elect Eng - by Enrique Cavalitto
- Definition(s)
- The current carrying capacity, expressed in amperes, of a conductor under stated thermal conditions. Energy Technologies, Inc.
- Example sentence(s)
- Though the melting point of copper theoretically imposes a limit on wire ampacity, the materials commonly employed for insulating conductors melt at temperatures far below the melting point of copper, and so practical ampacity ratings are based on the thermal limits of the insulation. - allaboutcircuits.com
- Determination of the actual thermal resistivity of the soil is very important since the thermal characteristics of the surrounding soil and the laying depth of the cable circuit can alter the circuit ampacity by more than 50%. - Kema
- In general most terminals are rated for 75 degrees C. Conductors with 90 degree C insulations can be used on these terminals provided they are not used at an ampacity higher than the 75 degree C. ampacity. However, the 90 degree insulation ampacity can be used for derating purposes. - electriciancalculators.com
Compare [close] Compare [close] - Serbian
- Electronics / Elect Eng
- Search
- Term
- Electronics / Elect Eng - by Enrique Cavalitto
- Definition(s)
- Dozvoljena struja opterećenja (kabla) u amperima
Own research - by Mira Stepanovic
- Example sentence(s)
- Predmet: ELEKTROENERGETSKA KABLOVSKA TEHNIKA
Konstruktivni elementi i vrste elektroenergetskih kablova. Električno polje kabla. Električni parametri kabla. Gubici snage kod kablova. Strujna opteretljivost kablova.
Uticaj sredine na strujnu opteretljivost kablova. Strujna opteretljivost pri kratkom spoju. Kablovske završnice i spojnice. - Elektronski fakultet Niš by Mira Stepanovic
- Uticaj termičke nehomogenosti zemljišta na strujnu opteretljivost
Kod određivanja intenziteta termički trajno dozvoljene struje kablova položenih u zemlji obično se polazi od činjenice da je zemljište homogeno sa termičkog aspekta. Međutim, kablovski vod veće dužine može da prolazi kroz zemljište različitih termičkih karakteristika, kao i da se na pojedinim delovima provlači kroz cevi ili kablovice. Zbog toga se u radu analiziraju dva karakteristična slučaja na koje se mogu svesti razni slučajevi u praksi. Određeni su izrazi za raspodelu temperature duž provodnika kabla koji omogućavaju analizu uticaja termičke nehomogenosti na strujnu opteretljivost kabla. Analizom strujne opteretljivosti tri jednožilna kabla XHE 48-A 1x100/95 mm2 110 kV postavljena u snopu, pokazano je da termička nehomogenost zemljišta ima veliki uticaj na vrednost termički trajno dozvoljene struje.
IMPACT OF SOIL THERMAL NON-HOMOGENEITY ON CABLE AMPACITY
In ampacity calculation, for the cables laid in the ground the fact is usually taken into account that the soil is homogeneous from the thermal aspect. However, long cable line can pass through the grounds of different thermal characteristics, or some parts of the cable may pass through the pipes or the ducts. Therefore, this paper analyzes two characteristic cases that represent different practical cases. The equations for
temperature distribution along the cable conductor are derived, which enables analyzing the impact of thermal non-homogeneity on the cable ampacity. The cable ampacity analysis of three single-core cables XHE 48-A 1x100/95 mm2 110 kV in three-phase system bunched, shows that soil thermal non-homogeneity has a great impact on the value of rated ampacity. - Elektroprivreda by Mira Stepanovic
- Koeficijenti uticaja vetra i sunčevog zračenja na strujnu opteretljivost nadzemnih vodova sa Al/č provodnicima - Elektroprivreda by Mira Stepanovic
- Related KudoZ question
Compare [close] - Compare this term in: Croatian, Albanian, Arabic, Bulgarian, Czech, German, Greek, Spanish, Persian (Farsi), French, Hindi, Hungarian, Portuguese, Romanian, Slovak, Swedish, Ukrainian
| | The glossary compiled from Glossary-building KudoZ is made available openly under the Creative Commons "By" license (v3.0). By submitting this form, you agree to make your contribution available to others under the terms of that license. | | | | X Sign in to your ProZ.com account... | | | | | | |