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1 in damaged condition
Экономика: в повреждённом состоянии -
2 in damaged condition
English-russian dctionary of contemporary Economics > in damaged condition
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3 condition
1. n1) состояние, положение2) pl обстоятельства, условия, обстановка; режим3) условие, оговорка
- abnormal conditions
- acceptable conditions
- actual operating conditions
- additional conditions
- adverse conditions
- apparent condition
- as-received condition
- atmospheric conditions
- auxiliary condition
- average conditions
- basic conditions
- basis conditions
- boilerplate conditions
- boom conditions
- business conditions
- climatic conditions
- commercial conditions
- competitive conditions
- compulsory conditions
- credit conditions
- critical conditions
- debenture conditions
- defective condition
- design conditions
- desired conditions
- dissolving condition
- economic conditions
- emergency conditions
- end-service condition
- end-use condition
- environmental conditions
- equal conditions
- equilibrium conditions
- existing conditions
- express conditions
- extreme conditions
- faulty condition
- favourable conditions
- feasibility conditions
- financial condition
- financial conditions
- first-order conditions
- general conditions
- general conditions of a contract
- guarantee conditions
- housing conditions
- implied condition
- inequitable condition
- inflationary conditions
- insurance conditions
- job conditions
- labour conditions
- lease conditions
- letter of credit conditions
- licence conditions
- limiting condition
- living conditions
- loan conditions
- local conditions
- main condition
- maintenance conditions
- mandatory conditions
- marginal conditions
- market condition
- market conditions
- marketing conditions
- meteorological conditions
- moderate operating conditions
- normal conditions
- obligatory conditions
- operable condition
- operating condition
- operating conditions
- operation conditions
- operational conditions
- optimal conditions
- outside condition
- peak condition
- perfect condition
- permanent condition
- plant conditions
- policy conditions
- poor condition
- practical conditions
- precedent condition
- preferential conditions
- preliminary condition
- prescribed conditions
- prevailing conditions
- prevalent market conditions
- prior condition
- production conditions
- project conditions
- proper condition
- purchase and sale conditions
- queue condition
- rated conditions
- readiness condition
- realistic conditions
- realizability condition
- reasonable conditions
- regular service conditions
- resolutive condition
- restrictive conditions
- running conditions
- safety conditions
- saturation condition
- second-order conditions
- service conditions
- serviceable condition
- shop conditions
- side condition
- site conditions
- social conditions
- soil condition
- sound condition
- special conditions
- special policy conditions
- stabilized production conditions
- stable monetary conditions
- standard conditions
- stand-by condition
- starting conditions
- stipulated conditions
- storage conditions
- strict budgetary conditions
- strict technical conditions
- stringent conditions
- subsequent condition
- suitable conditions
- suitable shipping conditions
- surplus conditions
- suspensive condition
- technical conditions
- technological conditions
- tender conditions
- test conditions
- top condition
- trading conditions
- traffic conditions
- transport conditions
- unequal conditions
- unfair conditions
- unfavourable conditions
- uniform conditions
- unsatisfactory conditions
- unsound financial condition
- unstable market conditions
- usable condition
- use conditions
- usual conditions
- working conditions
- conditions of acceptance
- condition of cargo
- conditions of a contract
- conditions of delivery
- conditions of employment
- conditions of financing
- condition of goods
- conditions of a guarantee
- conditions of a letter of credit
- conditions of life
- conditions of the market
- conditions of marketing
- condition of packages
- conditions of participation
- conditions of payment
- conditions of sale
- conditions of service
- conditions of subscription
- conditions of supply
- conditions of transport
- conditions of work
- as per conditions
- in accordance with conditions
- in damaged condition
- in good condition
- in serviceable condition
- in undamaged condition
- in working condition
- on condition
- out of condition
- under existing conditions
- under the given conditions
- under production conditions
- adhere to conditions
- alter conditions
- attach conditions
- bargain for better conditions
- break conditions
- change conditions
- conform to conditions
- create favourable conditions
- follow conditions
- fulfil conditions
- implement conditions
- impose conditions
- improve conditions
- include conditions
- incorporate conditions
- infringe conditions
- lay down conditions
- make conditions
- meet conditions
- modify conditions
- observe conditions
- revise conditions
- set forth conditions
- stipulate conditions
- superimpose conditions
- violate conditions
- yield to conditions2. vEnglish-russian dctionary of contemporary Economics > condition
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4 sound
прил.1) общ. здоровый, крепкий2) общ. неповрежденный, неиспорченный; хороший; (добро)качественныйsound timber — хорошая [прочная, крепкая\] древесина
sound fruit — свежие [неиспорченные\] фрукты
See:3)а) общ. устойчивый, стабильный, прочныйб) эк. платежеспособный; надежный, устойчивый ( в финансовом отношении)4) общ. правильный; здравый, логичный, разумныйsound judgement — разумное [здравое\] суждение
5) общ. полный, совершенный, тщательный (об анализе, исследовании)6) юр. действительный, законный -
5 darbnederīgums
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6 repair
The restoration of an aeronautical product to an airworthy condition as defined by the appropriate airworthiness requirements.The restoration of an aeronautical product to an airworthy condition to ensure that the aircraft continues to comply with the design aspects of the appropriate airworthiness requirements used for the issuance of the type certificate for the respective aircraft type, after it has been damaged or subjected to wear. (AN 6/I, 8th ed.; AN 8, 9th ed.)(AN 8, 10th ed.)(AN 6/I; AN 6/II; AN 6/III; AN 8)Official definition added to AN 8 by Amdt 98 (2/03/2004) and modified by Amdt 100 (13/04/2005).Восстановление лётной годности авиационного изделия, определяемой соответствующими нормами лётной годности.Восстановление летной годности авиационного изделия после его повреждения или износа для обеспечения дальнейшего соответствия воздушного судна требованиям к конструированию, предусмотренным соответствующими нормами летной годности, которые использовались для выдачи сертификата типа соответствующему типу воздушного судна.International Civil Aviation Vocabulary (English-Russian) > repair
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7 landed quality
торг., трансп. качество выгруженного товара (качество товара в момент выгрузки в месте назначения, в отличие от качества товара на момент отправки; за ущерб, нанесенный товару во время пути, может отвечать перевозчик)If the condition is on landed weight and landed quality basis then Letter of Credit will be drawn to a certain percentage (i.e. 90% of the value of invoice) and balance 10% will be payable at destination after inspection and certification. — Если оплата производится на основании веса и качества выгруженного товара, то аккредитив должен быть выписан под определенный процент (90 % стоимости счета) и остальные 10 % должны быть заплачены на месте выгрузки товара после их осмотра и сертифицирования.
See:* * * -
8 as good as new
новенький, разг. как огурчик(If you say that something or someone is as good as new, you mean that they are in a very good condition or state, especially after they have been damaged or ill.)I only ever use that on special occasions so it’s as good as new … In a day or so he will be as good as new.
Англо-русский универсальный дополнительный практический переводческий словарь И. Мостицкого > as good as new
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9 report
донесение, сообщение; доклад; рапорт; арт. звук выстрела; доносить; докладывать; рапортовать; представлять(ся) ( начальнику), pl. представление донесений ( пункт боевого приказа)meaconing, interference, jamming, intrusion report — донесение о применении комплексных помех типа «Миджи» (помехи РИС, пассивные и активные помехи, помехи средствам радиосвязи)
— bombing report— casualty situation report— exemption report— hotline report— letter efficiency report— logistics status report— minefield lifting report— nuclear attack report— performance evaluation report— weapons status report -
10 device
приспособление; механизм; устройство; установка; прибор; аппарат (см. также apparatus, instrument, mechanism); элемент; компонент; метод; методика; процедура; способ; план; проект; схема; эмблема; амер. значок- device capacity - device class - device complexity - device control character - device control register - device control unit - device coordinates - device cycle - device directory - device docking - device driver - device error message - device executive - device for all-range centrifugal regulator correction - device ID - device independent - device integration - device operating failures - device queue - device resolution - device stability - device status condition - device under test - activation device - alarm device - anticrash device - AND device - anti-dazzling device - anticollision device - anticreep device - antidive device - antijamming device - antijoy ride device - antipumping device - antiroll device - antirotation device - assembly feed device - automatic arm locking device - automatic tracking device - bit rotation device - breakaway device - breakaway safety device - breakout device - bridge device - bridging device - built-in diagnostic device - bucket-tipping device - casing-rotating device - catch device - catching device - center-locating device - central control device - chain-stretching device - chain-type leveling device - levelling device - changeover device - character display device - charging device - checking device - chip control device - chip flushing device - choice device - chuck jaw-changing device - chuck jaw-forming device - chuck location device - chucking device - circular milling device - clearance device - clearing device - clever device - clutch antirotation device - clutch-operating device - code device - coded automatic reader device - cold-start device - compensating device - complete device - compliance device - compliant device - computer access device - conditioning device - constant hydrostatic head device - constant tension device - constant torque device - contact device - contact sealing device - continuously variable adjustment device - control device - control-monitor device - control device controlling device - controlled device - controlled handling device - controlling device - conveying-loading device - coolant transfer device - copying device - correcting device - crane device - cross rail clamping device - current-collecting device - custom's device - cutoff device - cut-out device - cutter angle testing device - cutter-checking device - cutter-trueing device - damping device - data storage device - data-setting device - deburring device - deep hole tapping device - defective device - delta-connected device - density device - depth-measuring device - differential device - differential speed reduction device - digital measuring device - dimension monitoring device - directed beam display device - discrete output device - disengaging device - disk-type leveling device - display device - distance-measuring device - diverting device - dividing device - dragging device - dressing device - drilling device - drive device - driven device - driving roller device - duplicating device - edging device - educational device - electric control device - electromechanical locking device in case of rope failure - electronic storage device - emergency cutoff device - emergency-knockoff device - emergency release device - emergency stop device - emission control device - emptying device - end device device - end-finishing device - end-machining device - end-of-arm tooling safety device - energy storage device - error-detection device - error-sensing device - escapement device - estimation device - etching device - executive device - expandable holding device - external diagnostic device - external read-in device - fail-active device - fail-passive device - fail-safe device - failure-detection device - failure-indicating device - failure-sensing device - fastening device - fault-isolation device - fault-locating device - feed control device - feeding device - fifth-wheel device - finger-type leveling device - finger-type levelling device - fixed length stroke device - fixing device - fixturing device - flaw-detecting device - flotation device - flow control device - flow-diverting device - fluid logic device - four-arm device - fuel-metering device - fuel run-out warning device - functional switching device - galvanic device - gas discharge device - gas-partitioning device - go-no-go device - grabbing device - graphic input device - gravitational separating device - gravity device - gripping device - guard device - guide device - Hall device - Hall-effect device - handling device - hard-wired command-and-control device - hauling device - height-measuring device - height setting-and-measuring device - helical milling device - high-pressure cleaning device - hoisting device - hold-down device - hold-off device - holding device - holding down device - hole-locating device - homing device - honing device - hooking device - hopper-type loading device - hydraulic releasing device - hydraulic retaining device - hydraulically actuated retaining device - ignition device - in-line device - in-process gaging device - in-process storage device - indexing device - indicating device - indicator device - inertial energy-storage device - information-processing device - input device - input-output device - inspection device - insulation monitoring device - interference detection device - interlock device - interlocking device - isolating device - jarring device - jaw shift device - jet device - joint device - knock-off device - labour-saving device - latching device - laying device - lift device - lift device with insulating arm - lifting device - limiting device - linear measuring device - load-handling device - load safety device - load-unload device - loading device - loading-unloading device - locating device - locking device - long lateral device - long normal device - low-frequency galvanic device - lubricating device - M-code device - machine retaining device - machine-dedicated device - machining device - magnetic holding device - magnetic medium input device - magnetic release device - magnetic testing device - magnetizing device - make-and-break device - manual input device - marking device - master device - master locating device - matching device - material-handling device - materials-handling device - measuring device - mechanical switching device - mechanical system diagnostic device - mending device - metering device - metrology room device - microautomatic device - microfocused device - micrometric displacement device - microspacing device - minimum-current release device - miter-cutting device - mixing device - monitoring device - monostable device - motion translation device - movement position device - muffling device - multichannel analyzer device - multidigit display device - multipallet automatic pallet-changing device - multipart clamping device - multiple switching device - multipoint measuring device - night viewing device - noise-attenuating device - noise-eliminating device - nondeteriorating device - nonsynchronous loading device - normal device - normal logging device - numerical control device - nut-locking device - off-line device - offloading device - offtake device - oiling device - oleodynamic device - on-line device - operating device - operation-performing device - optical reading device - optical scanning device - optoelectronic device - OR device - orienting device - origin-shift device - output device - oval turning device - overcurrent release device - overload-detecting device - overload device - overload prevention device - overload-protection device - overload release device - overload safety device - override-idle economy device - pallet load-unload device - pallet locating-and-clamping device - pallet shuttle device - pallet transfer device - pallet transport device - part handling-and-storage device - part-marking device - part present device - part presentation device - part probing device - partitioning device - pen-equipped device - peripheral recording device - permanent insulation monitoring device - personal protective device - photoelectric device - photoelectric semiconductor device - photosensitive device - pick device - pick-and-place device - pickup device - pipe collapsing device - pipe-cutting device - pipe hoisting device - pipe makeup and breakout automatic device - pipe-shearing device - pipe stabber device - pit level device - plotting device - plug-in device - plugging device - pointer device - pointer-type device - pointing device - poligon-cutting device - polyphase device - polyphase electrical device - porosity-estimating device - porosity-sensitive device - position control device - positioning device - power-assisted clamping device - power chucking device - preselector device - presence sensing device - pressure abnormal fall detecting device - pressure-difference device - pressure fall preventing device - pressure-sensing device - primary device - printing device - probe control device - probe-changing device - probing device - process-monitoring device - profiling device - program transfer device - programmable device - programmable wheel trueing device - projection optical device - propulsion device - propulsive device - protecting device - protective device - puller device - pulling device - pushing device - radial stretching device - radius planing device - radius trueing device - rail-clamping device - rail-setting device - ratchet device - ratcheting device - reading device - readout device - ready-not-ready device - reclosing device - recognition device - recording device - redundancy device - redundant device - regulating device - regulator device - relay device - releasing device - relief device - relieving device - remote maintenance device - repairable device - resetting device - resistivity measuring device - resolver position measuring device - rest device - restraint device - retaining device - retrieval device - return spring device - reverse-current release device - reverse-thrust device - reversing device - right-angle orientating device - robot device - robot-like device - robot load-unload device - robot part-handling device - robotic device - robotic inspection device - robotic loading device - rocking device - roll feed device - rotary machining device - rotary power-torque device - rotating device - sand-spraying device - safety device - safety alarm device - safety control device - safety interlock device - safety locking device - safety slipping device - sampling device - scanning device - scraping device - screening device - screw copying device - screw locking device - sealing device - search device - searching device - securing device - seed-feeding device - sowing device - seed-sowing device - self-balancing device - self-diagnosis device - self-gripping device - self-healing device - self-leveling device - self-levelling device - self-reacting device - self-repair device - semiautomatic device - semiconductor device - semiconductor display device - semiconductor power device - semiconductor switching device - sending device - sensing device - sensing-switching device - sensor device - separation device - serial device - setting device - shaker device - shearing device - short normal device - short-time memory device - shut-down device - shut-off device - shuting-off device - sighting device - signal device - signaling device - single-lever locking device - single-phase device - single-phase electrical device - single-pole switching device - sizing device - skew-compensating device - slitter device - slowing-down device - smart device - smart power device - snap-action switching device - sonic device - sound emitting device - special machine retaining device - speed reduction device - speed-limit device - speed-limiting device - speed-sensing device - spindle-keylock device - spindle-keylocking device - spinning device - spiral milling device - split clamping device - spooling device - spraying device - spreading device - spring balancing device - squelch device - stall warning device - star-connected device - starting device - static switching device - steadying device - steering device - stirring device - stocking device - stop device - stopper-rod device - stopping device - storage device - stretching device - strip-off device - stroke device - surface-mounted device - swing arm device - swirling device - switch device - switching device - switch-type sensing device - switching-off device - table-tilting device - tactile sensing device - take-up device - taper-turning device - tapping device - tea-leaf harvesting device - picking device - telechiric device - telemetering device - tensioner device - tensioning device - testing device - thermal release device - thermoelectric device - three-axis sensing device - three-dimensional sensing device - three-linear axis device - thrust-vectoring device - tightening device - tilting device - time-cycling device - time-delay device - tipping device - tool-changing device - tool-checking device - tool feed control device - tool-guiding device - tool life control device - tool-loading device - tool-pregaging device - tool-presetting device - tool-setting device - tool storage device - toolholder-changing device - toolholding device - torque release device - tracing device - transfer device - trip-free mechanical switching device - tripping device - trouble-location device - trouble-shooting device - trueing device - trunnion device - tube end finishing device - tube-cutting device - tube-trimming device - turnaround device - turnover device - twin-pallet rotating device - two-axis sensing device - ultrasonic proximity device - universal machine retaining device - upsetting device - unwinding device - variable gain device - variable speed device - vector-measuring device - visible light emission device - warning device - washing device - water suction device - waveguide protection device - wear-sensing device - weighting device - wheel-trueing device - withdrawing device - work recognition device - work rest device - work-staging device - work transfer device - workhandling device - workholding device - workpiece holddown device - workpiece-sensing device - workpiece support device - worm-type leveling device - zero-resetting device - zero-setting device -
11 perfect
1. a совершенный, безупречный, идеальный, прекрасныйpast perfect — прошедшее совершенное, перфектное время
2. a полный3. a точныйperfect register — точная приводка, точное совмещение
4. a чистый, без примесей5. a законченный, полный, абсолютный6. a хорошо подготовленный, достигший совершенства7. a разг. приятный, чудесный8. a эмоц. -усил. совершенный, настоящийin perfect sincerity — совершенно откровенно, с полной откровенностью
9. a полигр. бесшвейный10. v совершенствовать, улучшать11. v совершенствоваться12. v завершать, заканчивать, выполнять13. v полигр. печатать на оборотной стороне листа14. n грам. перфект15. a грам. перфектныйСинонимический ряд:1. absolute (adj.) absolute; consummate; fleckless; impeccable; indefectible; note-perfect; unflawed2. exact (adj.) definite; distinct; exact; precise; sharp; sound; thorough; typical3. expert (adj.) accomplished; adept; adroit; expert; skilled4. faultless (adj.) excellent; exquisite; faultless; immaculate; matchless; taintless5. finished (adj.) completed; finished; full6. flawless (adj.) flawless; inviolate; unblemished7. model (adj.) exemplary; ideal; model; supreme; very8. total (adj.) all-out; arrant; downright; out-and-out; outright; plain; pure; pure and simple; sheer; simple; thoroughgoing; total; unadulterated; unalloyed; unbounded; undiluted; unequivocal; unmitigated; unmixed; unqualified; unrelieved9. utter (adj.) all-fired; black; blamed; blank; blankety-blank; blasted; bleeding; blessed; blighted; blinding; blithering; blue; confounded; crashing; dad-blamed; dad-blasted; dad-burned; damned; dang; darn; dashed; deuced; doggone; double-distilled; durn; utter10. whole (adj.) choate; complete; entire; good; intact; integral; round; unbroken; undamaged; unhurt; unimpaired; uninjured; unmarred; untouched; whole11. accomplish (verb) accomplish; achieve; complete; consummate; finish; fulfil; fulfill12. polish (verb) complement; polish; purify; refine; round; sleek; slick; smoothАнтонимический ряд:bad; damaged; defective; deficient; deformed; faulty; flawed; imperfect; impure; incomplete; inferior; lacking; maladroit; marred; partial; questionable; ruin -
12 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
Франко-русский словарь нормативно-технической терминологии > courant admissible, m
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13 courant permanent 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
Франко-русский словарь нормативно-технической терминологии > courant permanent admissible, m
-
14 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
Немецко-русский словарь нормативно-технической терминологии > Dauerstrombelastbarkeit, f
-
15 Strombelastbarkeit, 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
Немецко-русский словарь нормативно-технической терминологии > Strombelastbarkeit, f
-
16 continuous current-carrying capacity
длительная пропускная способность по току
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]Тематики
- электротехника, основные понятия
EN
(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
Англо-русский словарь нормативно-технической терминологии > continuous current-carrying capacity
-
17 ampacity (US)
(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
Англо-русский словарь нормативно-технической терминологии > ampacity (US)
-
18 continuous current
(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
непрерывный ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999]Тематики
- электротехника, основные понятия
EN
Англо-русский словарь нормативно-технической терминологии > continuous current
-
19 current-carrying capacity
(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
предельно допустимый ток
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]Тематики
- электротехника, основные понятия
EN
прочность печатной платы к токовой нагрузке
Свойство печатной платы сохранять электрические и механические характеристики после воздействия максимально допустимой токовой нагрузки на печатный проводник или металлизированное отверстие печатной платы.
[ ГОСТ Р 53386-2009]Тематики
EN
Англо-русский словарь нормативно-технической терминологии > current-carrying capacity
См. также в других словарях:
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