Recovery Times of Vaccum Interrupters Which have Stationary Anode Spots

Frind, G.; Carroll, J. J.; Goody, C. P.; Tuohy, E. J.

doi:10.1109/tpas.1982.317141

Cited by 60 publications

(4 citation statements)

References 12 publications

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“…Vacuum arc has been used for a long time in many applications and has been an important tool for switching devices. 1) Vacuum arc has also fascinated physicists and engineers owing to its characteristic, that is, the natural concentration of current at the cathode spot, moving randomly or across the cathode surface as directed by a magnetic field. 2) Cathode spots produce a spray of droplets known as macroparticles, which have deleterious effects on plasma jets and some applications.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Study and Motion Analysis of Arc Spot Initiated on Nanostructured Tungsten

Hwangbo

Kajita

Osaka

et al. 2013

Jpn. J. Appl. Phys.

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Arcing on the nanostructured tungsten surface has been examined recently because it gives rise to the erosion of materials and impurity transport toward the core plasma in a nuclear fusion reactor. Arcing was initiated on a helium-exposed tungsten surface, on which nanostructured tungsten was formed, by irradiation with ruby laser pulses of 0.08 MJ·m-2. The motion of an arc spot was observed with a fast-framing camera. The magnetic field strength and arc current dependences of velocity were discussed on the basis of experimental observation. Arc trails were observed using a digital fine scope to determine the relationship between the grouping width of an arc trail and arc velocity; the changes in grouping width and condition of the specimen surface are discussed. Spectroscopic measurements were performed to determine the electron temperature by the Boltzmann plot method.

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Section: Introductionmentioning

confidence: 99%

Spectroscopic Study and Motion Analysis of Arc Spot Initiated on Nanostructured Tungsten

Hwangbo

Kajita

Osaka

et al. 2013

Jpn. J. Appl. Phys.

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“…5). Nous pouvons donc exclure l'existence de taches anodiques, telles celles notées à plus basse fréquence dans les régimes d'arcs concentrés [6,7]. Si, sur cette zone descendante de la courbe, nous nous intéressons à la densité apparente de courant crête, ramenée à la surface de la tache anodique bleutée sus indiquée, nous trouvons une valeur approximativement constante de 80 A/mm 2.…”

Section: Influence Des Paramètres Géométriquesunclassified

“…Pour pallier cet inconvénient, nous avons mis à profit la grande résistivité de l'Inconel, pour élaborer des électrodes présentant une surface active sans aspérité et « perméable » au champ magnétique [7]. [Erosion of a slit line.]…”

Section: Influence D'un Champ Magnétique -unclassified

Etude d'un conjoncteur-disjoncteur à vide pour impulsion de courant intense

Bauville

Delmas

Haddad

1990

Rev. Phys. Appl. (Paris)

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2014 L'article est relatif à l'étude des capacités de conduction et de réisolement d'un conjoncteurdisjoncteur à vide. Le temps de conduction est de 27 03BCs et le temps de réisolement imposé est inférieur à 100 03BCs. Nous avons mis en évidence l'influence des paramètres physiques et géométriques afin d'obtenir le régime d'arc diffus donnant accès aux meilleures performances de disjonction. Ainsi le pouvoir de coupure du prototype testé, a dépassé 109 V.A (36 kA, 44 kV). Abstract. 2014 The article is relative to the recovery phenomena and conduction capacities of a fast triggered vacuum switch. 27 03BCs current pulses are used. Fixed recovery times are less than 100 03BCs. We study the influence of physical and geometrical parameters in order to obtain the arc diffuse mode which allows best switching performances. Thus a breaking capacity more than 109 V. A is obtained with a 36 kA current pulse and 44 kV recovery voltage.

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“…Among interrupter properties, the current interruption capacity has been attributed to the vacuum arc characteristics often described by the electron densities and/or metal vapor densities [5][6][7][8][9], which are microscopic fundamental quantities highly influenced by electrode materials [10,11]. Therefore, detailed diagnosis of the electron and metal vapor densities can provide a fundamental, clear explanation for the relation between the interruption capacity and CuCr composition.…”

Section: Introductionmentioning

confidence: 99%

Influence of CuCr electrode composition on 2D electron and metal vapor density distribution over vacuum arc

Inada¹,

Kikuchi²,

Nagai³

et al. 2020

J. Phys. D: Appl. Phys.

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ShackHartmann-type laser wavefront sensors were utilized for the systematic investigation on Cr content dependence of 2D electron and metal vapor density distributions over vacuum arcs generated between CuCr electrodes, whose Cr content were 0 wt.%, 25 wt.%, 35 wt.%, 50 wt.% and 75 wt.%. The electron density was highest for the Cr25wt.% and Cr35wt.%, while the metal vapor density was lowest for the same CuCr electrode compositions. These experimental results demonstrated high consistency with previously reported CuCr composition dependence of electrode erosion rates, duration time of anode melting and residual charge after current zero. Furthermore, based on the present density data and previously proposed dielectric recovery processes, it was suggested that Cr25wt.% and Cr35wt.% are suitable for the interruption of intense-mode vacuum arcs; instead, Cr50wt.% and Cr75wt.% are useful for diffused arc interruption. The validity of this suggestion was supported by previous experimental studies reporting Cr content dependence of arc current interruption capacities and dielectric recovery speeds.

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Recovery Times of Vaccum Interrupters Which have Stationary Anode Spots

Cited by 60 publications

References 12 publications

Spectroscopic Study and Motion Analysis of Arc Spot Initiated on Nanostructured Tungsten

Spectroscopic Study and Motion Analysis of Arc Spot Initiated on Nanostructured Tungsten

Etude d'un conjoncteur-disjoncteur à vide pour impulsion de courant intense

Influence of CuCr electrode composition on 2D electron and metal vapor density distribution over vacuum arc

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