. . . . . . . . . . "6758"^^ . . . . . . . "Wy\u0142adowanie snopiaste"@pl . . . . . . . . "Una Desc\u00E0rrega de pinzell \u00E9s una desc\u00E0rrega el\u00E8ctrica disruptiva similar a una desc\u00E0rrega de corona que t\u00E9 lloc en un el\u00E8ctrode quan se li aplica una alta tensi\u00F3, estant situat dins d'un fluid no conductor, generalment l'aire. Es caracteritza per m\u00FAltiples espurnes lluminoses i escampades en totes direccions com serpentines de plasma compostes de part\u00EDcules ionitzades, que surten repetidament de l'el\u00E8ctrode cap a l'aire, sovint amb un so d'espurneig. Les serpentines s'estenen en forma de ventall, donant-li l'aspecte d'un \u201Cpinzell\u201D."@ca . "7955905"^^ . . . . "Brush discharge"@en . "Una Desc\u00E0rrega de pinzell \u00E9s una desc\u00E0rrega el\u00E8ctrica disruptiva similar a una desc\u00E0rrega de corona que t\u00E9 lloc en un el\u00E8ctrode quan se li aplica una alta tensi\u00F3, estant situat dins d'un fluid no conductor, generalment l'aire. Es caracteritza per m\u00FAltiples espurnes lluminoses i escampades en totes direccions com serpentines de plasma compostes de part\u00EDcules ionitzades, que surten repetidament de l'el\u00E8ctrode cap a l'aire, sovint amb un so d'espurneig. Les serpentines s'estenen en forma de ventall, donant-li l'aspecte d'un \u201Cpinzell\u201D."@ca . . "Desc\u00E0rrega de pinzell"@ca . . "A brush discharge is an electrical disruptive discharge similar to a corona discharge that takes place at an electrode with a high voltage applied to it, embedded in a nonconducting fluid, usually air. It is characterized by multiple luminous writhing sparks, plasma streamers composed of ionized air molecules, which repeatedly strike out from the electrode into the air, often with a crackling sound. The streamers spread out in a fan shape, giving it the appearance of a \"brush\". Corona and brush discharges are sometimes called one-electrode discharges because they occur in the vicinity of a single electrode, and don't extend as far as the electrode carrying opposite polarity voltage in the circuit, as an electric arc (a two-electrode discharge) does. \n* Corona discharge \u2014 occurs at sharp points and edges (radius < 1 mm). It is a uniform ionization (glow discharge) visible as a dim stationary blue glow, fading out as it extends from the conductor. \n* Brush discharge \u2014 occurs at a curved electrode (radius between 5 and 50 mm) in the vicinity of a flat electrode. It consists of a short ionization channel which breaks up into a fan of multiple moving streamers which strike toward the other electrode. If the electrode is too sharp, a corona discharge will usually occur instead of a brush discharge. \n* Arc or spark discharge \u2014 A \"two electrode\" discharge that occurs when an ionized channel extends all the way from one electrode to the other. This allows a large current to flow, releasing a large amount of energy. Both brush and corona discharges represent local regions next to conductors where due to the high voltage the air has undergone electrical breakdown: it has ionized and become conductive, allowing current to leak into the air. They occur when the electric field at the conductor exceeds the dielectric strength of the air, the \"disruptive potential gradient\", roughly 30 kilovolts per centimeter. At that voltage, electrons in the air are accelerated by the electric field to a high enough velocity that they knock other electrons off gas molecules when they hit them, creating ions and additional electrons, which go on to ionize additional molecules in a chain reaction. The electric field is highest at sharp points on the conductor, so discharges tend to form at these points. Because the electric field decreases as the distance from the conductor increases, it eventually drops below the value needed for ionization, so corona and brush discharges have a limited extent and are localized near the conductor. Occurring in very high voltage equipment like EHV power transmission lines, radio transmitters and their antennas, CRT power supplies, and power supplies for scientific equipment like lasers and particle accelerators, a brush discharge represents a serious failure of electrical insulation, and may be a fire hazard. Like other electric arcs, brush discharges produce ozone gas, which can be noxious to nearby people in an enclosed space and over time can cause embrittlement of some plastics. Tesla coils producing brush discharges and streamer discharges are displayed for entertainment at science fairs and rock concerts. The ability of an electrical discharge to cause an explosion in flammable atmospheres is measured by the effective energy of the discharge. The effective energy of brush discharges is 10-20 mJ, much larger than that of corona discharges 0.1 mJ. Therefore, brush discharges are considered an explosion hazard, while corona discharges are not. Brush discharges can occur from charged insulating plastics (for example polythene) to a conductor."@en . . . . . . . . . . . . "Wy\u0142adowanie snopiaste - rodzaj wy\u0142adowania elektrycznego zachodz\u0105cego w powietrzu, powstaj\u0105ce wskutek jonizacji udarowej w pobli\u017Cu ostrza elektrody. Wy\u0142adowanie to przyjmuje posta\u0107 p\u0119czka \u015Bwietlistych smug sprawiaj\u0105cych wra\u017Cenie swobodnie sp\u0142ywaj\u0105cych z ostrza. Zjawisko to jest po\u015Brednim efektem mi\u0119dzy wy\u0142adowaniem koronowym a iskr\u0105 elektryczn\u0105. Smugi nie przebiegaj\u0105 w tym wypadku po ca\u0142ej powierzchni pomi\u0119dzy elektrodami, lecz urywaj\u0105 si\u0119 w powietrzu. Wok\u00F3\u0142 elektrody powietrze staje si\u0119 wysoce zjonizowane, gdy\u017C panuje w jej pobli\u017Cu du\u017Ce zag\u0119szczenie nat\u0119\u017Cenia pola elektromagnetycznego. Powstanie tego rodzaju wy\u0142adowa\u0144 uzale\u017Cnione jest m.in. od napi\u0119cia, biegunowo\u015Bci zacisku oraz kszta\u0142tu i d\u0142ugo\u015Bci ostrza. Z wy\u0142adowaniami snopiastymi mamy do czynienia niemal przy wszystkich rodzajach wy\u0142adowa\u0144 z izolator\u00F3w. Elektrony zag\u0119szczone na ostrzu katody wzajemnie wypychaj\u0105 si\u0119 na zewn\u0105trz, kiedy natomiast ostrze jest anod\u0105 wtenczas katoda kszta\u0142tuje si\u0119 w przestrzeni gazowej - pojawiaj\u0105 si\u0119 wtenczas delikatne \u015Bcie\u017Cki - snopki elektron\u00F3w - w\u0119druj\u0105cych do metalowej elektrody."@pl . . . . . . . "Wy\u0142adowanie snopiaste - rodzaj wy\u0142adowania elektrycznego zachodz\u0105cego w powietrzu, powstaj\u0105ce wskutek jonizacji udarowej w pobli\u017Cu ostrza elektrody. Wy\u0142adowanie to przyjmuje posta\u0107 p\u0119czka \u015Bwietlistych smug sprawiaj\u0105cych wra\u017Cenie swobodnie sp\u0142ywaj\u0105cych z ostrza. Zjawisko to jest po\u015Brednim efektem mi\u0119dzy wy\u0142adowaniem koronowym a iskr\u0105 elektryczn\u0105."@pl . . . . "1062321876"^^ . . . "A brush discharge is an electrical disruptive discharge similar to a corona discharge that takes place at an electrode with a high voltage applied to it, embedded in a nonconducting fluid, usually air. It is characterized by multiple luminous writhing sparks, plasma streamers composed of ionized air molecules, which repeatedly strike out from the electrode into the air, often with a crackling sound. The streamers spread out in a fan shape, giving it the appearance of a \"brush\"."@en .