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1 point-to-point wiring element
1) Электроника: навесной элемент2) Макаров: навесной компонентУниверсальный англо-русский словарь > point-to-point wiring element
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2 point-to-point wiring element
навесной элемент; навесной компонентEnglish-Russian electronics dictionary > point-to-point wiring element
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3 point-to-point wiring element
навесной элемент; навесной компонентThe New English-Russian Dictionary of Radio-electronics > point-to-point wiring element
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4 point-to-point wiring element
English-Russian dictionary of electronics > point-to-point wiring element
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5 element
= elem1) элемент; компонент; составная часть; деталь3) pl основы; фундамент; исходные принципы; первые принципы (напр. науки)4) pl природные явления•- acoustic radiating element
- active element - antenna array element
- antenna radiating element
- array element
- asynchronous element
- base functional element
- basic functional element
- beam-shaping element
- bender element
- bilateral element
- bistable element
- branch element
- branching element
- bubble-domain readout element
- C-element
- capacitive-storage element
- charge-transfer element
- chevron propagating element
- circuit element
- code element
- collimating element - computer element
- control element
- correction element
- coupling element
- current-stable element
- data element
- data transmitting element
- decision element
- decoupling element
- delay element
- depletion element
- destructive readout element
- detector array element
- diagonal matrix element
- diagonal tensor element
- diffused element
- director element
- discrete element
- display element
- distributed element
- distributed-constant element
- domain tip readout element
- doping element
- driven element
- driving element
- dummy element
- EL element
- electrical element
- electroluminescence element
- electronegative element
- electropositive element - Faraday element
- fast element
- feed element
- ferroelectric element - final controlling element
- floating-gate element
- foreign element
- Friele line element
- fusing element
- fuze-setting element
- generating element
- Goto-pair memory element
- governing element
- heat element
- heating element
- Helmholtz line element
- high-speed element
- holographic element
- hook-up wiring element
- IC element
- idempotent element
- identity element
- image element
- impurity element
- inactive element
- initial element
- intracavity laser tuning element
- intracavity laser frequency tuning element
- Kerr element
- key element
- L-element
- lexical element
- light-dividing element
- line element
- linear electric current element
- linear magnetic current element
- logic element
- luminous element
- lumped element
- lumped-constant element
- M element
- magnetoresistance bubble readout element
- marking element
- master element
- matrix element
- memory element
- MEMS optical element
- MEMS-based optical element
- message key element
- META element
- microelectromechanical system optical element
- microelectromechanical system-based optical element
- monolithic element
- motor element
- moving meter element - negative resistance element
- nondestructive readout element - off-diagonal matrix element
- off-diagonal tensor element
- optical fiber element
- optoelectronic element
- parasitic element
- pass element
- passive element - piezoelectric-crystal element
- piezoresistive element
- planar Hall-effect bubble readout element
- plug-in element
- point-to-point wiring element
- polarization determining element
- position-finding element
- positioning element
- primary element
- primitive element
- print element
- printed element
- processing element
- propagating element
- propagation element
- R-element
- radiating element
- rare-earth element
- rectifying element
- reference element
- reference input element
- reflecting element
- reflector element
- refracting element - resistive element
- resistor element
- resolvable elements
- resonant element
- sampling element
- scheduling processing element
- Schrödinger line element
- screen element
- semiconductor element
- sensing element
- sequential logic element
- signal element - standard element
- start element
- stop element
- storage element
- S-type element
- suppression element - telegraph signal element
- temperature element
- temperature-compensated reference element
- tensor element - thick-film element
- thin-film element
- threshold element
- time-varying element
- timing element
- tracer element
- transition element
- tree-branch element
- trimming element
- tse processing element
- tuning element
- two-terminal element
- ultor element
- undriven element
- unidirectional element
- unit element
- voltage-stable element -
6 element
1) элемент; компонент; составная часть; деталь3) pl. основы; фундамент; исходные принципы; первые принципы (напр. науки)4) pl. природные явления•- acoustic radiating element
- active element
- adaptive linear element
- aligning element
- antenna array element
- antenna radiating element
- array element
- asynchronous element
- base functional element
- basic functional element
- beam-shaping element
- bender element
- bilateral element
- bistable element
- branch element
- branching element
- bubble-domain readout element
- C element
- capacitive-storage element
- charge-transfer element
- chevron propagating element
- circuit element
- code element
- collimating element
- common management information service element
- compensating element
- computer element
- control element
- correction element
- coupling element
- current-stable element
- data element
- data transmitting element
- decision element
- decoupling element
- delay element
- depletion element
- destructive readout element
- detector array element
- diagonal matrix element
- diagonal tensor element
- diffused element
- director element
- discrete element
- display element
- distributed element
- distributed-constant element
- domain tip readout element
- doping element
- driven element
- driving element
- dummy element
- EL element
- electrical element
- electroluminescence element
- electronegative element
- electropositive element
- essential elements of information
- excitable element
- Faraday element
- fast element
- feed element
- ferroelectric element
- field-alterable control element
- final control element
- final controlling element
- floating-gate element
- foreign element
- Friele line element
- fusing element
- fuze-setting element
- generating element
- Goto-pair memory element
- governing element
- heat element
- heating element
- Helmholtz line element
- high-speed element
- holographic element
- hook-up wiring element
- IC element
- idempotent element
- identity element
- image element
- impurity element
- inactive element
- initial element
- intracavity laser frequency tuning element
- intracavity laser tuning element
- Kerr element
- key element
- L element
- lexical element
- light-dividing element
- line element
- linear electric current element
- linear magnetic current element
- logic element
- luminous element
- lumped element
- lumped-constant element
- M element
- magnetoresistance bubble readout element
- marking element
- master element
- matrix element
- memory element
- MEMS optical element
- MEMS-based optical element
- message key element
- META element
- microelectromechanical system optical element
- microelectromechanical system-based optical element
- monolithic element
- motor element
- moving meter element
- multi-layer adaptive linear element
- multi-wire element
- negative resistance element
- nondestructive readout element
- nonlinear charge-storage element
- nonlinear element
- N-type element
- off-diagonal matrix element
- off-diagonal tensor element
- optical fiber element
- optoelectronic element
- parasitic element
- pass element
- passive element
- picture element
- piezoelectric element
- piezoelectric-crystal element
- piezoresistive element
- planar Hall-effect bubble readout element
- plug-in element
- point-to-point wiring element
- polarization determining element
- position-finding element
- positioning element
- primary element
- primitive element
- print element
- printed element
- processing element
- propagating element
- propagation element
- R element
- radiating element
- rare-earth element
- rectifying element
- reference element
- reference input element
- reflecting element
- reflector element
- refracting element
- remote operations service element
- resistance element
- resistive element
- resistor element
- resolvable elements
- resonant element
- sampling element
- scheduling processing element
- Schrödinger line element
- screen element
- semiconductor element
- sensing element
- sequential logic element
- signal element
- signal processing element
- spacing element
- standard element
- start element
- stop element
- storage element
- S-type element
- suppression element
- tactile element
- target element
- telegraph signal element
- temperature element
- temperature-compensated reference element
- tensor element
- texture element
- thermoelectric element
- thick-film element
- thin-film element
- threshold element
- time-varying element
- timing element
- tracer element
- transition element
- tree-branch element
- trimming element
- tse processing element
- tuning element
- two-terminal element
- ultor element
- undriven element
- unidirectional element
- unit element
- voltage-stable element
- volume picture elementThe New English-Russian Dictionary of Radio-electronics > element
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7 навесной элемент
1) Engineering: add-on component, hookup element2) Electronics: discrete element, hook-up element, hook-up wiring element, point-to-point wiring element3) Information technology: add-on device, attached device -
8 навесной компонент
1) Engineering: add-on component, add-on device2) Electronics: added component, external component3) Microelectronics: attached device4) Makarov: hook-up wiring element, point-to-point wiring elementУниверсальный русско-английский словарь > навесной компонент
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9 навесной компонент
attached device, add-on device, added component, hook-up wiring element, point-to-point wiring elementРусско-английский словарь по электронике > навесной компонент
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10 навесной элемент
hook-up wiring element, point-to-point wiring element -
11 навесной компонент
add-on device, attached device, added component, hook-up wiring element, point-to-point wiring elementРусско-английский словарь по радиоэлектронике > навесной компонент
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12 навесной элемент
hook-up wiring element, point-to-point wiring elementРусско-английский словарь по радиоэлектронике > навесной элемент
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13 control
1) контроль
2) контрольный
3) обоснование
4) обосновывать
5) оперативный
6) регулировать
7) регулировочный орган
8) совладать
9) управление
10) управляемость
11) управляющий
12) штурвальный
13) регулировка
14) управлять
15) проверять
16) регулирование
17) инструкция
18) исполнительный
19) контролировать
20) проверка
21) проверочный
22) регулирующий
– absence of control
– air traffic control
– air-traffic control
– analysis is in control
– anticipatory control
– arc control device
– association control
– attenuation control
– attitude control
– automatic control
– autonomous control
– autothrottle control
– bang-bang control
– be in control
– be out of control
– bin control gate
– brightness control
– bucket tip control
– bulge control
– centralized control
– closed-cycle control
– complete control
– context control
– continuous control
– contrast control
– control accuracy
– control action
– control actuator
– control agent
– control air
– control algorithm
– control amplifier
– control and display
– control assembly
– control beam
– control bus
– control button
– control cabinet
– control cable
– control cam
– control center
– control channel
– control character
– control characteristic
– control circuit
– control code
– control column
– control combination
– control computer
– control crank
– control criterion
– control current
– control cylinder
– control data
– control desk
– control electrode
– control electronics
– control element
– control equipment
– control factor
– control flutter
– control force
– control function
– control gate
– control gear
– control graphitization
– control instruction
– control jet
– control joint
– control key
– control knob
– control lag
– control lever
– control limit
– control linkages
– control links
– control loop
– control magnet
– control means
– control mode
– control module
– control motor
– control of airplane
– control office
– control operation
– control panel
– control pedal
– control position
– control problem
– control pulse
– control range
– control reactor
– control register
– control relay
– control response
– control room
– control shaft
– control spin
– control statement
– control stick
– control surface
– control survey
– control switch
– control temperature
– control theory
– control track
– control transistor
– control unit
– control vector
– control voltage
– control weeds
– control winding
– control wiring
– corrosion control
– dash control
– data control
– derivative control
– digital control
– direct control
– distance control
– disturbance-compensating control
– dive-recovery control
– duplicate control
– dust control
– ease of control
– elevator control
– emergency control
– end-point control
– engine control
– environment control
– error control
– error-closing control
– exclusive control
– extension of control
– feed control
– feed-back control
– feedback control
– filament control
– fine control
– fire control
– flight control
– floating control
– flood control
– flow-rate control
– focus control
– frequency control
– front-panel control
– gain control
– ganged control
– geodetic control
– go out of control
– ground control
– gyrorudder control
– hand control
– headwater control
– height control
– hierarchical control
– in-process control
– independent control
– indirect control
– industrial control
– input-output control
– integral control
– interacting control
– intermittent control
– inventory control
– jet control
– job control language
– layout of control
– leather control
– level control
– linearity control
– load control
– local control
– lose control
– loss of control
– manual control
– master control
– meduim-access control
– meduim-access control
– mission control
– multicircuit control
– noise control
– numerical control
– off-line control
– on-line control
– on-off control
– open-loop control
– operating control
– optimal control
– optimization control
– out of control
– pass control
– path control
– path of control
– pedal control
– pest control
– phase control
– phase-lock control
– piano-key control
– plan control
– point of control
– point-to-point control
– power-assisted control
– product control
– program control
– programmed control
– proportional control
– proportional-plus-floating control
– push-button control
– pushbutton control
– quality control
– radio control
– ramp control
– reaction control
– recovery control
– regain control
– register control
– remotability of control
– remote control
– roll control
– rudder control
– run-off control
– sampled-data control
– segregate control
– selectivity control
– self-acting control
– sensitivity control
– servo control
– slide control
– slope control
– statistical control
– steering control
– supervisory control
– take control
– technical control
– temperature control
– throttle control
– tone control
– touch control
– traffic control
– tuning control
– vertical control
– vibration control
– voice-activated control
– volume control
aerodynamic control surface — руль управления аэродинамический
automatic control equipment — аппаратура автоматического управления
automatic frequency control — частотная АПЧ, автоматическая настройка частоты
automatic gain control — <tech.> регулировка усиления автоматическая
automatic remote control — <comput.> телеавтоматика
automatic voltage control — регулирование напряжения автоматическое
bang-bang control system — <comput.> система управления релейная
cancelling control button — < railways> кнопка отмены
centralized traffic control — < railways> централизация
conditional transfer of control — условная передача управления
control aisle of a substation — коридор управления подстанции
control in pitch of airplane — продольное управление самолетом
control point adjustment — настройка точки регулирования, <engin.> задатчик
control tower service — <aeron.> служба диспетчерская
coordinated phosphate control — коррекционная обработка воды
differential control method — дифференцированный метод контроля
dispatcher's supervisory control — телеуправление диспетчерское
fire control computer — счетно-решающее устройство для управления артиллерийским огнем
fire control director — прибор управления артиллерийским огнем
floating control mode — <comput.> способ регулирования астатический
intermittent gain control — < radio> регулировка усиления временная
lateral control of airplane — поперечное управление самолетом
microprocessor control system — микропроцессорная система управления
pressure control instrument — <tech.> маностат
proportional control factor — <comput.> коэффициент пропорционального регулирования
range finder control — <geod.> метод дальномерно-базисный
reactor control system — <engin.> система управления и защиты
remote control interlocking — < railways> телецентрализация, централизация дистанционная
river control structure — <geol.> сооружение выправительное
servo control unit — <engin.> гидроусилитель
spray-type superheat control — впрысковое регулирование перегрева
supervisory control system — <comput.> автодиспетчер
thermostatic temperature control — ключевое термостатирование
volume range control — регулирование динамического диапазона
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14 tube
2) патрубок4) туннель5) англ. метро(политен)6) резин. камера ( шины или рукава)7) резин. шприцевать трубчатую заготовку9) футляр, гильза ( сухого элемента)10) эл. вентиль14) электронно-лучевой прибор, ЭЛП15) электронно-лучевая трубка, ЭЛТ17) лупа (напр. визирная)18) губа, тюбик•-
acorn tube
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afterglow tube
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air tube
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airspeed tube
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aligned-grid tube
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all-metal tube
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all-rubber tube
-
amplification tube
-
annular tubes
-
attenuator tube
-
augmentor tube
-
backward-wave tube
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ballast tube
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bantam tube
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Barkhausen-Kurz tube
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Barkhausen tube
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barometer tube
-
bead tube
-
beam tube
-
beam-deflection selector tube
-
beam-indexing tube
-
beam-power tube
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beam-storage tube
-
beam-switching tube
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bipotential cathode-ray tube
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bipotential tube
-
black-and-white picture tube
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blast tube
-
blind-end tube
-
blocking tube
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boiling tube
-
bottom-guide tube
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Bourdon tube
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branch tube
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Braun tube
-
bridge wall tubes
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bubble tube
-
butt-ended tube
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calandria tube
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calming tube
-
camera tube
-
casing tube
-
casting tube
-
cathode-ray memory tube
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cathode-ray tube
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cell-type tube
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center air tube
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charge-storage tube
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choke tube
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Christophorsen tube
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chromatron tube
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cigarette tube
-
clad tube
-
clean tube
-
cloth-inserted tube
-
coiled tubes
-
cold-cathode tube
-
collapsible tube
-
color cathode-ray tube
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color picture tube
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concentric draft tube
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contactor tube
-
contact tube
-
continuous tube
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convergent short tube
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convergent tube
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converging tube
-
convoluted tube
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corona-discharge tube
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corona tube
-
counter tube
-
cracking tube
-
crossed-field tube
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crossover tube
-
cutting oxygen tube
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damper tube
-
dark-trace tube
-
decade counter tube
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delta gun shadow mask tube
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density-modulated tube
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detonator tube
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dipper tube
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direct viewing tube
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direct view tube
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directional-beam X-ray tube
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direct-viewing storage tube
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direct-view storage tube
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discharge tube
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display storage tube
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display tube
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dissector tube
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distillation tube
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diverging tube
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double-gun cathode-ray tube
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double-walled tube
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draft tube
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drainage tube
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drain tube
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drawdown tube
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dredging tube
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drying tube
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elbow-type draft tube
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elbow draft tube
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electrical-signal storage tube
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electric-signal storage tube
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electrode cooling tube
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electrometer tube
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electron-beam tube
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electronic tube
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electron-multiplier tube
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electrostatic memory tube
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emulsion tube
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end-window counter tube
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erect image focusing tube
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evaporating tube
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exhaust tube
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extension tube
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externally quenched counter tube
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fabric tube
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Faraday tube
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fast-screen cathode-rat tube
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feeder tube
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fence tube
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filler tube
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fire tube
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flame tube
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flange tube
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flared-type draft tube
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flash tube
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flat tube
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flat-ended tube
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flat-faced tube
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flat-screen tube
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flexible metal tube
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flow tube
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fluorescent tube
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fluted tube
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flux-feed tube
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flux tube
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flying spot scanning tube
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focusing tube
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fractional distillating tube
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fuel tube
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fuel-element charging tube
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fuel-element discharge tube
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fuel-element transfer tube
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fuel-port tube
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furnace tube
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fuse tube
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gas-discharge tube
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gas-filled counter tube
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gas-flow counter tube
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Geiger-Muller counter tube
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Geiger counter tube
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glow tube
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glow-discharge tube
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grid-glow tube
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grilled tube
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grout tube
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guide tube
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halogen tube
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heavy-end tube
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heavy-fin tube
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heavy-walled tube
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helical welded tube
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high-vacuum tube
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high-velocity camera tube
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hot-cathode tube
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image camera tube
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image pickup tube
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image tube
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image-converter tube
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image-dissector tube
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image-intensifier tube
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impact tube
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indicator tube
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inductance tube
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inflatable rubber tube
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injection tube
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inlet tube
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in-line gun color picture tube
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in-line color picture tube
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in-line picture tube
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inner tube
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insulating tube
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internally pressurized tube
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ionization-gage tube
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isosceles triangular tube
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lance tube
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Lawrence tube
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lens tube
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level tube
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lift tube
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line-focus tube
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local-oscillator tube
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longitudinal welded tube
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low-fin tube
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low-velocity camera tube
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L-shape tube
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luminescent tube
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luminescent-screen tube
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luminous discharge tube
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magnetic-focusing tube
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Maxwell tube
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mechanically controlled tube
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memory cathode-ray tube
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memory tube
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mercury pool tube
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mercury-arc tube
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miniature tube
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mixer tube
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mixing tube
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Mojonnier tube
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mold tube
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Moody spreading draft tube
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Moody draft tube
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M-type tube
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multielectrode tube
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multigun cathode-ray tube
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multigun tube
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multiple tube
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multiplier tube
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multistage X-ray tube
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neon tube
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night-sight tube
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nitrometer tube
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Nixie tube
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nonuniformly heated tube
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oscillating tube
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oscillograph tube
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O-type tube
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outlet tube
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panoramic X-ray tube
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parent tube
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pastes tube
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penetration tube
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phase-shifter tube
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photoelectric tube
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photoflash tube
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photomultiplier tube
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photosensitive tube
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pickup tube
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picture tube
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PIL type tube
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PIL tube
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Pitot tube
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plumbicon tube
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poison tube
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polyallomer tube
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polycarbonate tube
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pool-cathode tube
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pool tube
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power tube
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precision in-line tube
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preheating oxygen tube
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pressure tube
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process tube
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projection tube
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proportional counter tube
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protector tube
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proximity-focused image tube
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puncture-sealing tube
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pyrometer tube
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radiant section tubes
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radiant tubes
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radiation counter tube
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radio tube
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reactance tube
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recording cathode-ray tube
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recording tube
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regulating tube
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reserve tube
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return tube
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revolving tube
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riffled tube
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rigid tube
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road-draft tube
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roof radiant tubes
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rotating-anode X-ray tube
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rough tube
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rubber tube
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rudder tube
-
run resist tube
-
safety inner tube
-
sampling tube
-
scaffold tube
-
screen tubes
-
scupper tube
-
seamless drawn tube
-
seamless tube
-
SEC tube
-
sectional X-ray tube
-
self-quenched counter tube
-
shaft tube
-
shielded tube
-
shock tube
-
silicon diode-array camera tube
-
silicon camera tube
-
silicon-intensifier target tube
-
siphon draft tube
-
sleeve tube
-
slot-mask tube
-
smooth-wall tube
-
snorkel tube
-
snow sampling tube
-
snow tube
-
softening point tubes
-
solid tube
-
space-charge-wave tube
-
stabilitron tube
-
stationary-anode X-ray tube
-
steam tube
-
steam-generating tube
-
steering tube
-
stern tube
-
stopper tube
-
storage cathode-ray tube
-
storage tube
-
straight draft tube
-
stream tube
-
strip-phosphor tube
-
suction tube
-
switching tube
-
tank breather tubes
-
television picture tube
-
television tube
-
tension tube
-
test tube
-
thermometer tube
-
thief tube
-
thin-walled tube
-
three-gun color picture tube
-
thruster tube
-
tire inner tube
-
torch tube
-
transition tube
-
transverse-field traveling-wave tube
-
traveling-wave tube
-
trigger tube
-
tripotential cathode-ray tube
-
tripotential tube
-
tube of current
-
tube of electric force
-
tube of flow
-
tube of magnetic flux
-
tube of magnetic force
-
twisting tube
-
twist tube
-
uniformly heated tube
-
U-V fluorescent tube
-
vacuum tube
-
vacuum-gage tube
-
valve tube
-
vapor delivery tube
-
vapor tube
-
Venturi tube
-
vidicon camera tube
-
vidicon tube
-
voltage-reference tube
-
voltage-regulating tube
-
wall radiant tubes
-
wall tube
-
waterwall tube
-
Williams tube
-
wire-reinforced plastic tube
-
wiring tube
-
X-ray tube
-
x-y shutter tube -
15 circuit
1) схема; цепь; контур2) канал; линия; тракт3) тлф. шлейф5) круговое движение, движение по окружности || совершать круговое движение, двигаться по окружности•- 2D circuit
- 3D circuit
- absorbing circuit
- absorption circuit
- ac circuit
- acceptor circuit
- adaptive logic circuit
- additive printed circuit
- adjustable threshold logic circuit
- aerial circuit
- alive circuit
- aluminium-gate MOS integrated circuit
- aluminum-gate MOS integrated circuit
- AM detecting circuit
- analog circuit
- ancillary circuit
- AND circuit
- anode circuit
- antenna circuit
- anticlutter circuit
- anticoincidence circuit
- antihunt circuit
- antijamming circuit
- anti-Karp circuit
- antiresonance circuit
- antiresonant circuit
- antisidetone circuit
- aperiodic circuit
- application-specific integrated circuit
- approved circuit
- array integrated circuit
- astable circuit
- autodyne circuit
- automatic start circuit
- averaging circuit
- azimuth-sweep circuit
- back-plate circuit
- back-to-back circuit
- balanced circuit
- base-line marker circuit
- basic circuit
- beta circuit
- beta feedback circuit
- bias circuit
- bidirectional clamping circuit
- bilateral circuit
- bipolar circuit
- bipolar integrated circuit
- bistable circuit
- bistable multivibrator circuit
- black stretch circuit
- black-level restoring circuit
- black-level setting circuit
- blanking circuit
- bootstrap circuit
- bound circuit
- boxcar circuit
- branch circuit
- branched circuit
- bridge circuit
- bridged circuit
- broken circuit
- bubble annihilation circuit
- bubble circuit
- bubble detection circuit
- bubble propagation circuit
- bubble replication circuit
- bubble stretching circuit
- bubble switching circuit
- bubble-domain annihilation circuit
- bubble-domain detection circuit
- bubble-domain propagation circuit
- bubble-domain replication circuit
- bubble-domain stretching circuit
- bubble-domain switching circuit
- bucket-brigade circuit
- buffer circuit
- building-out circuit
- built-up circuit
- bulk-effect integrated circuit
- butterfly circuit
- butterfly tank circuit
- calibrating circuit
- call circuit
- capacitive differentiator circuit
- capacitive oscillatory circuit
- cathode circuit
- central-battery circuit
- ceramic printed circuit
- charge-coupled device integrated circuit
- chemically deposited printed circuit
- chemically reduced printed circuit
- chemically-assembled integrated circuit
- chevron bubble propagation circuit
- chevron bubble-domain propagation circuit
- chip integrated circuit
- cholesteric circuit
- chopping circuit
- chrominance matrix circuit
- chrominance separation circuit
- chrominance take-off circuit
- circuit of graph
- clamping circuit
- clamp-on circuit
- clipping circuit
- clock circuit
- clocked circuit
- close-coupled circuits
- closed circuit
- closed magnetic circuit
- CMOS integrated circuit
- coaxial circuit
- coincidence circuit
- collector circuit
- collector-diffusion isolated integrated circuit
- color processing circuit
- color purity circuit
- color-balance circuit
- color-indexing circuit
- color-killer circuit
- Colpitts oscillatory circuit
- combinational circuit
- combinatorial circuit
- combiner circuit
- common-base circuit
- common-battery circuit
- common-cathode circuit
- common-collector circuit
- common-drain circuit
- common-emitter circuit
- common-gate circuit
- common-grid circuit
- common-source circuit
- common-use circuit
- compander circuit
- comparator circuit
- comparison circuit
- compatible circuit
- compensating circuit
- complementary circuit
- complementary MOS integrated circuit
- complementary symmetry circuit
- complementary symmetry MOS integrated circuit
- complementary-output circuit
- composite circuit
- compound circuit
- compression circuit
- computer circuits
- conference circuit
- consumer integrated circuit
- contiguous-disk bubble propagation circuit
- contiguous-disk bubble-domain propagation circuit
- control circuit
- controller circuit
- convergence circuit
- cord circuit
- core-diode circuit
- core-transistor circuit
- correction input circuit
- COSMOS circuit
- countdown circuits
- counter circuit
- counter timer circuit
- counting circuit
- coupled circuits
- cross-control circuit
- crossed-waveguide circuit
- crosspoint integrated circuit
- cryotron circuit
- cue circuit
- current-access bubble circuit
- current-feedback circuit
- current-limited circuit
- current-source equivalent circuit
- custom circuit
- customer-specific integrated circuit
- custom-wired integrated circuit
- cutoff circuit
- damping circuit
- dash circuit
- data circuit
- dc circuit
- dc restoration circuit
- dead-on-arrival integrated circuit
- decision circuit
- decision making circuit
- decoupling circuit
- dedicated integrated circuit
- deep-submicron integrated circuit
- degenerative circuit
- delay circuit
- delay-insensitive circuit
- delay-sensitive circuit
- delta circuit
- demultiplexing circuit
- deposited integrated circuit
- derived circuit
- despiker circuit
- despiking circuit
- detector circuit
- detuned circuit
- dial toll circuit
- dial-up circuit
- diamond circuit
- die integrated circuit
- dielectric isolated integrated circuit
- differential-frequency circuit
- differentiating circuit
- diffused-isolation integrated circuit
- digital circuit
- digital integrated circuit
- digital logic circuit
- diode array integrated circuit
- diode integrated circuit
- diode-coupled circuit
- diplex circuit
- direct international circuit
- direct transit international circuit
- direct-coupled circuit
- direct-wire circuit
- discharge circuit
- discrete circuit
- discrete-component circuit
- disjunction circuit
- distributed-element circuit
- divided circuit
- dividing circuit
- Doppler tracking circuit
- dot circuit
- double-coincidence circuit
- double-ended cord circuit
- double-ridge easitron circuit
- double-ridge Karp circuit
- double-sided circuit
- double-tuned circuit
- down-scaled integrated circuit
- driven circuit
- dry circuit
- dry-processed integrated circuit
- DTF circuit
- dual-in-line integrated circuit
- duplex circuit
- duplicated circuit
- dynamic-convergence circuit
- dynamic-focus circuit
- dynamic-track following circuit
- earth circuit
- earthed circuit
- E-beam litho circuit
- EC circuit
- Eccles-Jordan circuit
- EITHER-OR circuit
- electric circuit
- electronic circuit
- elevated-electrode integrated circuit
- embossed-foil printed circuit
- emitter-coupled circuit
- emitter-follower logic integrated circuit
- engineering circuit
- epitaxial circuit
- epitaxial passivated integrated circuit
- equalization circuit
- equivalent circuit
- equivalent integrated circuit
- etched printed circuit
- evaporated circuit
- exclusive OR circuit
- expanded-sweep circuit
- expander circuit
- external circuit
- external magnetic circuit
- extra LSI circuit
- face-down integrated circuit
- fail-safe circuit
- fallback circuit
- fan-in circuit
- fan-out circuit
- fast time-constant circuit
- feed circuit
- feedback circuit
- ferrite-diode circuit
- ferrite-transistor circuit
- ferroresonant circuit
- field-access bubble circuit
- field-programmable integrated circuit
- filament circuit
- film integrated circuit
- fine-line integrated circuit
- fine-pattern integrated circuit
- flat-pack integrated circuit
- flexible printed circuit
- flip-chip integrated circuit
- flip-flop circuit
- flux transfer circuit
- flywheel circuit
- forced coupled circuits
- forked circuit
- four-wire circuit
- frame-grounding circuit
- frame-scanning circuit
- free coupled circuits
- freely oscillating coupled circuits
- free-running circuit
- frequency-changing circuit
- full-wave circuit
- fully integrated circuit
- function circuit
- g equivalent circuit
- ganged circuits
- gate circuit
- gate equivalent circuit
- Giacoletto circuit
- Goto-pair circuit
- grid circuit
- grounded circuit
- grounded-base circuit
- grounded-collector circuit
- grounded-emitter circuit
- grounded-grid circuit
- ground-return circuit
- grouping circuit
- guard-ring isolated monolithic integrated circuit
- Gunn-effect circuit
- h equivalent circuit
- half-phantom circuit
- half-wave circuit
- Hamilton circuit
- hardened circuit
- Hartley oscillatory circuit
- Hazeltine neutralizing circuit
- head circuit
- heater circuit
- high-temperature superconductor integrated circuit
- holding circuit
- horizontal scanning circuit
- horizontal sync circuit
- horizontal-deflection circuit
- hotline circuit
- hybrid circuit
- hybrid integrated circuit
- hybrid pi equivalent circuit
- hybrid thin-film circuit
- hybrid thin-film integrated circuit
- hybrid-type circuit
- I2L circuit
- ideal-transformer equivalent circuit
- identification circuit
- idler circuit
- ignition circuit
- image circuit
- impulsing circuit
- inclusive NOR circuit
- inclusive OR circuit
- incoming circuit
- individually wired circuit
- inductance-capacitance coupling circuit
- inductive circuit
- inductive differentiator circuit
- inductive oscillatory circuit
- inductively coupled circuit
- injection circuit
- injection integrated circuit
- input circuit
- inquiry circuit
- insulated-substrate integrated circuit
- integrate-and-dump circuit
- integrated circuit
- integrated injection logic circuit
- integrated optical circuit
- integrating circuit
- interaction circuit
- interface circuit
- inter-integrated circuit
- interlock circuit
- intermediate-frequency circuit
- inverter circuit
- ion-implanted bubble propagation circuit
- ion-implanted bubble-domain propagation circuit
- ion-implanted MOS integrated circuit
- iron circuit
- isolated integrated injection logic circuit
- isolated-substrate solid circuit
- isoplanar integrated circuit
- isoplanar-based integrated circuit
- joint circuit
- joint denial circuit
- Josephson logic integrated circuit
- Josephson-junction logic integrated circuit
- junction circuit
- junction-isolation integrated circuit
- Karp circuit
- keep-alive circuit
- keying circuit
- killer circuit
- label circuit
- ladder circuit
- lagging circuit
- large-scale hybrid integration circuit
- large-scale integration circuit
- laser-configured application-specific integrated circuit
- latched circuit
- latching Boolean circuit
- latching circuit
- leak circuit
- leakage circuit
- leased circuit
- line circuit
- linear circuit
- linear integrated circuit
- line-scan circuit
- line-scanning circuit
- live circuit
- load circuit
- local circuit
- local-battery circuit
- locking circuit
- Loftin-White circuit
- logic circuit
- long-distance telephone circuit
- longitudinal circuit
- losser circuit
- low-energy circuit
- low-temperature superconductor integrated circuit
- L-section circuit
- lumped circuit
- lumped-constant circuit
- made-to-order circuit
- magnetic circuit
- magnetic convergence circuit
- magnetic integrated circuit
- magnetic-core circuit
- majority circuit
- master-slice integrated circuit
- matching circuit
- matrix circuit
- matrix integrated circuit
- McCulloh circuit
- medium-scale integration circuit
- memory circuit
- merged transistor logic integrated circuit
- Mesny circuit
- message circuit
- metal-dielectric-semiconductor integrated circuit
- metallic circuit
- metal-oxide-semiconductor integrated circuit
- metal-oxide-semiconductor large scale integration circuit
- meter-current circuit
- meter-voltage circuit
- microcomputer integrated circuit
- microelectronic integrated circuit
- microenergy logic circuit
- micrologic circuit
- micropower circuit
- microprinted circuit
- microprocessor integrated circuit
- microprocessor logic-support circuit
- microprogrammed circuit
- microwatt circuit
- microwave circuit
- microwave integrated circuit
- mix circuit
- mixing circuit
- molecular integrated circuit
- monobrid integrated circuit
- monolithic integrated circuit
- monolithic microwave integrated circuit
- monophase integrated circuit
- monostable circuit
- MOS integrated circuit
- MOS-on-sapphire integrated circuit
- MTL integrated circuit
- mu circuit
- mu feedback circuit
- multibrid integrated circuit
- multichip integrated circuit
- multidrop circuit
- multifunctional integrated circuit
- multilayer circuit
- multilevel-metallized integrated circuit
- multiphase integrated circuit
- multiplanar circuit
- multiple circuit
- multiple-chip circuit
- multiple-substrate solid circuit
- multipoint circuit
- multistable circuit
- multistage circuit
- muting circuit
- NAND circuit
- nanotube integrated circuit
- n-channel logic MOS integrated circuit
- negative OR circuit
- NEITHER-NOR circuit
- neutral magnetic circuit
- neutralizing circuit
- noise equivalent circuit
- noise suppression circuit
- nondisjunction circuit
- noninductive circuit
- nonlinear circuit
- nonphantomed circuits
- nonredundant circuit
- NOR circuit
- NOT circuit
- NOT-AND circuit
- NOT-OR circuit
- off-the-shelf circuit
- one-chip integrated circuit
- one-sided circuit
- one-wire circuit
- open circuit
- open magnetic circuit
- open-wire circuit
- optical integrated circuit
- optically coupled circuit
- optoelectronic integrated circuit
- optron integrated circuit
- OR circuit
- OR-ELSE circuit
- oscillator circuit
- oscillatory circuit
- output circuit
- overcoupled circuits
- overlap telling circuit
- oxide-isolated integrated circuit
- packaged circuit
- painted printed circuit
- parallel circuit
- parallel LCR circuit
- parallel-resonant circuit
- parallel-series circuit
- passivated integrated circuit
- p-channel logic MOS integrated circuit
- peak-holding circuit
- peaking circuit
- peak-riding clipping circuit
- perforated bubble propagation circuit
- perforated bubble-domain propagation circuit
- periodic circuit
- peripheral integrated circuit
- permalloy circuit
- permanent virtual circuit
- phantom circuit
- phase-advance circuit
- phase-comparison circuit
- phase-compensating circuit
- phase-delay circuit
- phase-equalizing circuit
- phase-inverting circuit
- phase-lag circuit
- phase-shift circuit
- photonic integrated circuit
- physical circuits
- physical equivalent circuit
- pi circuit
- pickax bubble propagation circuit
- pickax bubble-domain propagation circuit
- piezoelectric-crystal equivalent circuit
- pilot circuit
- planar integrated circuit
- planex integrated circuit
- plastic integrated circuit
- plastic-encapsulated integrated circuit
- plate circuit
- plated circuit
- plated printed circuit
- p-n junction isolated integrated circuit
- point-to-point circuit
- polar circuit
- polarized magnetic circuit
- polling circuit
- polymer integrated circuit
- polymer logic circuit
- polymer-based logic circuit
- polyphase circuit
- positioning circuit
- potentiometer circuit
- potted circuit
- power adder circuit
- preemphasis circuit
- presetting circuit
- primary circuit
- primary series circuit
- printed circuit
- printed wiring circuit
- printed-component circuit
- program circuit
- programmed interconnection pattern large-scale integration circuit
- propagation circuit
- proprietary integrated circuit
- pulse-actuated circuit
- pulse-shaping circuit
- pulsing circuit
- pump circuit
- pumping circuit
- purity circuit
- push-pull circuit
- push-push circuit
- push-to-talk circuit
- push-to-type circuit
- quadruplex circuit
- quasi-bistable circuit
- quasi-monostable circuit
- quenching circuit
- quiet-tuning circuit
- r equivalent circuit
- radiating circuit
- radiation hardened integrated circuit
- radio circuit
- radio communication circuit
- radio-frequency integrated circuit
- radio-receiving circuit
- radio-transmitting circuit
- range-marker circuit
- range-sweep circuit
- range-tracking circuit
- rapid single flux quantum circuit
- RC circuit
- RCG circuit
- RCTL circuit
- RDTL circuit
- reactance control circuit
- reaction circuit
- reactive circuit
- read-and-write circuit
- redundant circuit
- reflex circuit
- regenerative circuit
- rejector circuit
- repeat circuit
- reset circuit
- reset control circuit
- reshaping circuit
- resistance-capacitance circuit
- resistance-inductance circuit
- resistance-inductance-capacitance circuit
- resistor-capacitor-transistor logic circuit
- resistor-coupled transistor logic circuit
- resistor-diode-transistor logic circuit
- resistor-transistor logic circuit
- resonant circuit
- retroactive circuit
- reverberation-controlled gain circuit
- right-plane circuit
- ring circuit
- ring-and-bar circuit
- ringdown circuit
- ringing circuit
- RL circuit
- RLC circuit
- RSFQ circuit
- RTL circuit
- sample-and-hold circuit
- sampling circuit
- scaled integrated circuit
- scale-of-eight circuit
- scale-of-ten circuit
- scale-of-two circuit
- scaling circuit
- scanning circuit
- scrambler circuit
- screened circuit
- sealed circuit
- sealed-junction integration circuit
- selective circuit
- self-holding circuit
- self-repairing circuit
- self-saturating circuit
- semiconductor integrated circuit
- semiconductor-magnetic circuit
- semicustom integrated circuit
- separation circuit
- series circuit
- series RLC circuit
- series-peaking circuit
- series-resonant circuit
- service circuit
- short circuit
- shunt circuit
- shunt-peaking circuit
- shunt-series circuit
- side circuits
- sidetone suppression circuit
- signal circuit
- signal-processing circuit
- silent circuit
- silicon integrated circuit
- silicon-on-sapphire integrated circuit
- simple parallel circuit
- simplex circuit
- single-chip integrated circuit
- single-ended circuit
- single-mask level bubble circuit
- single-phase circuit
- single-ridge easitron circuit
- single-ridge Karp circuit
- single-shot trigger circuit
- single-trip trigger circuit
- single-tuned circuit
- single-wire circuit
- slave circuit
- sliding short circuit
- slow-wave circuit
- small outline integrated circuit
- small-scale integrated circuit
- smoothing circuit
- sneak circuit
- software circuit
- solid-state circuit
- spare circuit
- spark circuit
- speaker circuit
- sprayed printed circuit
- square-rooting circuit
- squaring circuit
- squelch circuit
- stacked circuit
- staggered circuits
- stamped printed circuit
- standard scale circuit
- star-connected circuit
- starting circuit
- start-stop circuit
- static-induction transistor integrated circuit
- stenode circuit
- stick circuit
- stopper circuit
- storage circuit
- straightforward circuit
- stripline circuit
- submicron integrated circuit
- subscriber line interface circuit
- subscriber-line audio-processing circuit
- superconducting tank circuit
- superimposed circuit
- superposed circuit
- supervising circuit
- support circuit
- sweep circuit
- switch virtual circuit
- switched circuit
- switching circuit
- sync separator circuit
- sync stretch circuit
- synchronous circuit
- T2L circuit
- talk-back circuit
- tank circuit
- tantalum thin-film circuit
- tap circuit
- tapped circuit
- tapped resonant circuit
- tapped-capacitor circuit
- tapped-capacitor resonant circuit
- tapped-coil circuit
- tapped-coil resonant circuit
- tapped-inductor circuit
- tapped-inductor resonant circuit
- T-bar bubble propagation circuit
- T-bar bubble-domain propagation circuit
- T-circuit
- telegraph circuit
- telephone circuit
- telling circuit
- terminating circuit
- Thevenin equivalent circuit
- thick-film circuit
- thin-film circuit
- three-dimensional circuit
- three-phase circuit
- threshold circuit
- through circuit
- tie-line circuit
- time-base circuit
- time-delay circuit
- toll-circuit
- totem-pole circuit
- transfer circuit
- transformer-coupled circuit
- transistor equivalent circuit
- transistor-transistor logic circuit
- traveling-wave-tube interaction circuit
- tributary circuit
- trigger circuit
- trunk circuit
- trunk terminating circuit
- trunk-junction circuit
- tse circuit
- TTL circuit
- tube circuit
- tube equivalent circuit
- tuned circuit
- tuning circuit
- twin-circuit
- twin-T circuit
- two-dimensional circuit
- two-state circuit
- two-way circuit
- two-wire circuit
- UHS integrated circuit
- ultra-audion circuit
- ultra-high-speed integrated circuit
- unbalanced circuit
- undefined function circuit
- underdamped circuit
- unilateral circuit
- unipolar integrated circuit
- universal cord circuit
- vacuum integrated circuit
- vacuum-deposited integrated circuit
- vapor-deposited printed circuit
- vertical deflection circuit
- vertical scanning circuit
- vertical sync circuit
- very high-speed integrated circuit
- very large-scale integration circuit
- V-groove isolated integrated injection logic circuit
- vibrating circuit
- video circuit
- virtual circuit
- voltage-feedback circuit
- voltage-source equivalent circuit
- wafer-on-scale integrated circuit
- warning circuit
- watch integrated circuit
- waveguide circuit
- waveguide short circuit
- weakly superconducting circuit
- weighting circuit
- welded electronic circuit
- white circuit
- wire circuit
- wired circuit
- wire-wrapped circuit
- writing circuit
- X-bar bubble propagation circuit
- X-bar bubble-domain propagation circuit
- XNOR circuit
- XOR circuit
- X-ray litho integrated circuit
- y equivalent circuit
- Y-bar bubble propagation circuit
- Y-bar bubble-domain propagation circuit
- Y-connected circuit
- z equivalent circuit
- zig-zag asymmetrical permalloy-wedges circuit
- zigzag permalloy track circuitThe New English-Russian Dictionary of Radio-electronics > circuit
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16 явление электрической дуги
явление электрической дуги
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[Интент]Параллельные тексты EN-RU
Electric arc phenomenon
The electric arc is a phenomenon which takes place as a consequence of a discharge which occurs when the voltage between two points exceeds the insulating strength limit of the interposed gas; then, in the presence of suitable conditions, a plasma is generated which carries the electric current till the opening of the protective device on the supply side.
Gases, which are good insulating means under normal conditions, may become current conductors in consequence of a change in their chemical-physical properties due to a temperature rise or to other external factors.
To understand how an electrical arc originates, reference can be made to what happens when a circuit opens or closes.
During the opening phase of an electric circuit the contacts of the protective device start to separate thus offering to the current a gradually decreasing section; therefore the current meets growing resistance with a consequent rise in the temperature.
As soon as the contacts start to separate, the voltage applied to the circuit exceeds the dielectric strength of the air, causing its perforation through a discharge.
The high temperature causes the ionization of the surrounding air which keeps the current circulating in the form of electrical arc. Besides thermal ionization, there is also an electron emission from the cathode due to the thermionic effect; the ions formed in the gas due to the very high temperature are accelerated by the electric field, strike the cathode, release energy in the collision thus causing a localized heating which generates electron emission.
The electrical arc lasts till the voltage at its ends supplies the energy sufficient to compensate for the quantity of heat dissipated and to maintain the suitable conditions of temperature. If the arc is elongated and cooled, the conditions necessary for its maintenance lack and it extinguishes.
Analogously, an arc can originate also as a consequence of a short-circuit between phases. A short-circuit is a low impedance connection between two conductors at different voltages.
The conducting element which constitutes the low impedance connection (e.g. a metallic tool forgotten on the busbars inside the enclosure, a wrong wiring or a body of an animal entered inside the enclosure), subject to the difference of potential is passed through by a current of generally high value, depending on the characteristics of the circuit.
The flow of the high fault current causes the overheating of the cables or of the circuit busbars, up to the melting of the conductors of lower section; as soon as the conductor melts, analogous conditions to those present during the circuit opening arise. At that point an arc starts which lasts either till the protective devices intervene or till the conditions necessary for its stability subsist.
The electric arc is characterized by an intense ionization of the gaseous means, by reduced drops of the anodic and cathodic voltage (10 V and 40 V respectively), by high or very high current density in the middle of the column (of the order of 102-103 up to 107 A/cm2), by very high temperatures (thousands of °C) always in the middle of the current column and – in low voltage - by a distance between the ends variable from some microns to some centimeters.
[ABB]Явление электрической дуги
Электрическая дуга между двумя электродами в газе представляет собой физическое явление, возникающее в тот момент, когда напряжения между двумя электродами превышает значение электрической прочности изоляции данного газа.
При наличии подходящих условий образуется плазма, по которой протекает электрический ток. Ток будет протекать до тех пор, пока на стороне электропитания не сработает защитное устройство.
Газы, являющиеся хорошим изолятором, при нормальных условиях, могут стать проводником в результате изменения их физико-химических свойств, которые могут произойти вследствие увеличения температуры или в результате воздействия каких-либо иных внешних факторов.
Для того чтобы понять механизм возникновения электрической дуги, следует рассмотреть, что происходит при размыкании или замыкании электрической цепи.
При размыкании электрической цепи контакты защитного устройства начинают расходиться, в результате чего постепенно уменьшается сечение контактной поверхности, через которую протекает ток.
Сопротивление электрической цепи возрастает, что приводит к увеличению температуры.
Как только контакты начнут отходить один от другого, приложенное напряжение превысит электрическую прочность воздуха, что вызовет электрический пробой.
Высокая температура приведет к ионизации воздуха, которая обеспечит протекание электрического тока по проводнику, представляющему собой электрическую дугу. Кроме термической ионизации молекул воздуха происходит также эмиссия электронов с катода, вызванная термоэлектронным эффектом. Образующиеся под воздействием очень высокой температуры ионы ускоряются в электрическом поле и бомбардируют катод. Высвобождающаяся, в результате столкновения энергия, вызывает локальный нагрев, который, в свою очередь, приводит к эмиссии электронов.
Электрическая дуга длится до тех пор, пока напряжение на ее концах обеспечивает поступление энергии, достаточной для компенсации выделяющегося тепла и для сохранения условий поддержания высокой температуры. Если дуга вытягивается и охлаждается, то условия, необходимые для ее поддержания, исчезают и дуга гаснет.
Аналогичным образом возникает дуга в результате короткого замыкания электрической цепи. Короткое замыкание представляет собой низкоомное соединение двух проводников, находящихся под разными потенциалами.
Проводящий элемент с малым сопротивлением, например, металлический инструмент, забытый на шинах внутри комплектного устройства, ошибка в электромонтаже или тело животного, случайно попавшего в комплектное устройство, может соединить элементы, находящиеся под разными потенциалами, в результате чего через низкоомное соединение потечет электрический ток, значение которого определяется параметрами образовавшейся короткозамкнутой цепи.
Протекание большого тока короткого замыкания вызывает перегрев кабелей или шин, который может привести к расплавлению проводников с меньшим сечением. Как только проводник расплавится, возникает ситуация, аналогичная размыканию электрической цепи. Т. е. в момент размыкания возникает дуга, которая длится либо до срабатывания защитного устройства, либо до тех пор, пока существуют условия, обеспечивающие её стабильность.
Электрическая дуга характеризуется интенсивной ионизацией газов, что приводит к падению анодного и катодного напряжений (на 10 и 40 В соответственно), высокой или очень высокой плотностью тока в середине плазменного шнура (от 102-103 до 107 А/см2), очень высокой температурой (сотни градусов Цельсия) всегда в середине плазменного шнура и низкому падению напряжения при расстоянии между концами дуги от нескольких микрон до нескольких сантиметров.
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Русско-английский словарь нормативно-технической терминологии > явление электрической дуги
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17 electric arc phenomenon
явление электрической дуги
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[Интент]Параллельные тексты EN-RU
Electric arc phenomenon
The electric arc is a phenomenon which takes place as a consequence of a discharge which occurs when the voltage between two points exceeds the insulating strength limit of the interposed gas; then, in the presence of suitable conditions, a plasma is generated which carries the electric current till the opening of the protective device on the supply side.
Gases, which are good insulating means under normal conditions, may become current conductors in consequence of a change in their chemical-physical properties due to a temperature rise or to other external factors.
To understand how an electrical arc originates, reference can be made to what happens when a circuit opens or closes.
During the opening phase of an electric circuit the contacts of the protective device start to separate thus offering to the current a gradually decreasing section; therefore the current meets growing resistance with a consequent rise in the temperature.
As soon as the contacts start to separate, the voltage applied to the circuit exceeds the dielectric strength of the air, causing its perforation through a discharge.
The high temperature causes the ionization of the surrounding air which keeps the current circulating in the form of electrical arc. Besides thermal ionization, there is also an electron emission from the cathode due to the thermionic effect; the ions formed in the gas due to the very high temperature are accelerated by the electric field, strike the cathode, release energy in the collision thus causing a localized heating which generates electron emission.
The electrical arc lasts till the voltage at its ends supplies the energy sufficient to compensate for the quantity of heat dissipated and to maintain the suitable conditions of temperature. If the arc is elongated and cooled, the conditions necessary for its maintenance lack and it extinguishes.
Analogously, an arc can originate also as a consequence of a short-circuit between phases. A short-circuit is a low impedance connection between two conductors at different voltages.
The conducting element which constitutes the low impedance connection (e.g. a metallic tool forgotten on the busbars inside the enclosure, a wrong wiring or a body of an animal entered inside the enclosure), subject to the difference of potential is passed through by a current of generally high value, depending on the characteristics of the circuit.
The flow of the high fault current causes the overheating of the cables or of the circuit busbars, up to the melting of the conductors of lower section; as soon as the conductor melts, analogous conditions to those present during the circuit opening arise. At that point an arc starts which lasts either till the protective devices intervene or till the conditions necessary for its stability subsist.
The electric arc is characterized by an intense ionization of the gaseous means, by reduced drops of the anodic and cathodic voltage (10 V and 40 V respectively), by high or very high current density in the middle of the column (of the order of 102-103 up to 107 A/cm2), by very high temperatures (thousands of °C) always in the middle of the current column and – in low voltage - by a distance between the ends variable from some microns to some centimeters.
[ABB]Явление электрической дуги
Электрическая дуга между двумя электродами в газе представляет собой физическое явление, возникающее в тот момент, когда напряжения между двумя электродами превышает значение электрической прочности изоляции данного газа.
При наличии подходящих условий образуется плазма, по которой протекает электрический ток. Ток будет протекать до тех пор, пока на стороне электропитания не сработает защитное устройство.
Газы, являющиеся хорошим изолятором, при нормальных условиях, могут стать проводником в результате изменения их физико-химических свойств, которые могут произойти вследствие увеличения температуры или в результате воздействия каких-либо иных внешних факторов.
Для того чтобы понять механизм возникновения электрической дуги, следует рассмотреть, что происходит при размыкании или замыкании электрической цепи.
При размыкании электрической цепи контакты защитного устройства начинают расходиться, в результате чего постепенно уменьшается сечение контактной поверхности, через которую протекает ток.
Сопротивление электрической цепи возрастает, что приводит к увеличению температуры.
Как только контакты начнут отходить один от другого, приложенное напряжение превысит электрическую прочность воздуха, что вызовет электрический пробой.
Высокая температура приведет к ионизации воздуха, которая обеспечит протекание электрического тока по проводнику, представляющему собой электрическую дугу. Кроме термической ионизации молекул воздуха происходит также эмиссия электронов с катода, вызванная термоэлектронным эффектом. Образующиеся под воздействием очень высокой температуры ионы ускоряются в электрическом поле и бомбардируют катод. Высвобождающаяся, в результате столкновения энергия, вызывает локальный нагрев, который, в свою очередь, приводит к эмиссии электронов.
Электрическая дуга длится до тех пор, пока напряжение на ее концах обеспечивает поступление энергии, достаточной для компенсации выделяющегося тепла и для сохранения условий поддержания высокой температуры. Если дуга вытягивается и охлаждается, то условия, необходимые для ее поддержания, исчезают и дуга гаснет.
Аналогичным образом возникает дуга в результате короткого замыкания электрической цепи. Короткое замыкание представляет собой низкоомное соединение двух проводников, находящихся под разными потенциалами.
Проводящий элемент с малым сопротивлением, например, металлический инструмент, забытый на шинах внутри комплектного устройства, ошибка в электромонтаже или тело животного, случайно попавшего в комплектное устройство, может соединить элементы, находящиеся под разными потенциалами, в результате чего через низкоомное соединение потечет электрический ток, значение которого определяется параметрами образовавшейся короткозамкнутой цепи.
Протекание большого тока короткого замыкания вызывает перегрев кабелей или шин, который может привести к расплавлению проводников с меньшим сечением. Как только проводник расплавится, возникает ситуация, аналогичная размыканию электрической цепи. Т. е. в момент размыкания возникает дуга, которая длится либо до срабатывания защитного устройства, либо до тех пор, пока существуют условия, обеспечивающие её стабильность.
Электрическая дуга характеризуется интенсивной ионизацией газов, что приводит к падению анодного и катодного напряжений (на 10 и 40 В соответственно), высокой или очень высокой плотностью тока в середине плазменного шнура (от 102-103 до 107 А/см2), очень высокой температурой (сотни градусов Цельсия) всегда в середине плазменного шнура и низкому падению напряжения при расстоянии между концами дуги от нескольких микрон до нескольких сантиметров.
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Англо-русский словарь нормативно-технической терминологии > electric arc phenomenon
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