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AbstractAbstract
[en] The Joule heating of an inhomogeneous, temperature dependent resistivity conductor is studied numerically when a time-varying current flows through it. The bidimensionnel numerical model computes the temperature and current distributions at each time step consistently. A simple experimental verification is presented, together with one example showing how the model may be exploited
[fr]
On etudie numeriquement l'echauffement Joule d'un conducteur inhomogene, parcouru par un courant dependant du temps en tenant compte de la variation de la resistivite avec la temperature et de la diffusion thermique. Le modele numerique bidimensionnel calcule de facon coherente les repartitions de temperature et de courant au cours du temps. Une experience simple a montre la validite du modele et un exemple d'exploitation est presenteOriginal Title
Etude numerique et experimentale de l'echauffement d'un conducteur de forme complexe
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Revue de Physique Appliquee; v. 11(4); p. 483-487
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AbstractAbstract
[en] Primary erosion conception of a plasma current breaker suggested an appearance of an vacuum gap near cathode, through which electromagnetic energy may reach the load. The theory of two-dimensional flows of electrons and ions of a quasineutral plasma near electrodes is given
Original Title
Avtomodel'nye resheniya uravnenij ehlektronnoj magnitnoj gidrodinamiki i teoriya plazmennogo preryvatelya toka (PPT)
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Leroux, B.; Danner, J.P.; Rioux, C.; Rioux-Damidau, F.
Proceedings of the 9. Symposium on fusion technology1976
Proceedings of the 9. Symposium on fusion technology1976
AbstractAbstract
[en] A fast circuit breaker operated by an electromagnetic command has been realized. It can open very high currents in times in order of a few microseconds. By means of electromagnetic forces, a conductor is sent against rods and thus cut. The current is then transferred onto a fuse placed in parallel. The explosion of the fuse opens the circuit. A simplified set up has permitted to test some performances of the switch. A 240kA current has been opened in 6μs and a 5kV peak voltage simultaneously generated (half-width : 3μs). The transfer of a 130kA current has been realized in a time as small as 2μs
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Commission of the European Communities, Brussels (Belgium); p. 711-715; ISBN 0 08 021369 3;
; 1976; p. 711-715; 9. Symposium on fusion technology; Garmisch-Partenkirchen, Germany, F.R; 14 - 18 Jun 1976; Published by Pergamon Press

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AbstractAbstract
[en] The circuit breaker presented here is capable of interrupting a 10kA current within 1μs and then sustain an over voltage of the order of 20kV for a 3mm insulation width. The construction is of the mechanical rupture type in which the replacement of a piece of conductor by an insulator is ensured by means of the explosion of a stoichiometric mixture of hydrogen and oxygen. The current is then transfered into a fuse which finally transfers the energy to the load or opens the circuit
[fr]
Le disjoncteur presente dans cet article est capable de couper le courant de 10kA en 1μs et de supporter une surtension de l'ordre de 20kV pour une distance d'isolement de 3mm. Ce disjoncteur est du type a rupture mecanique: le remplacement brutal d'un morceau de conducteur par un isolant est assure par la surpression engendree par l'explosion d'un melange stoechiometrique d'hydrogene et d'oxygene. Le courant est alors derive sur une impedance variable (fusible qui assure, soit le transfert d'energie sur la charge, soit l'ouverture du circuitOriginal Title
Etude d'un disjoncteur pour courants intenses
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Revue de Physique Appliquee; v. 10(4); p. 241-245
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AbstractAbstract
No abstract available
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Anon; p. 98; 1976; 9. symposium on fusion technology; Garmisch-Partenkirchen, F.R. Germany; 14 Jun 1976; AED-CONF--76-309-095; 1 fig. Short communication only. Available from ZAED.
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AbstractAbstract
No abstract available
Original Title
Malfunction of LPCI valve
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14 Sep 1973; 2 p
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Zhang Jian; Jia Shenli; Li Xingwen; Shi Zongqian; Wang Lijun, E-mail: buildzh@mail.xjtu.edu.cn2010
AbstractAbstract
[en] Influence of the shock wave on the turbulence in a supersonic nozzle was investigated for a SF6 puffer circuit breaker interruption process. Turbulence is enlarged through the shock wave. Baroclinic generation of vortex causes flow separation and broadening of the arc cross section. V-I characteristics are slightly modified due to the shock wave's influence.
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Available from http://dx.doi.org/10.1088/1009-0630/12/1/16; Country of input: International Atomic Energy Agency (IAEA)
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Plasma Science and Technology; ISSN 1009-0630;
; v. 12(1); p. 76-80

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Ennis, M.G.; Turner, D.R.; Spencer, J.
XXII International conference on phenomena in ionized gases. Contributed papers 11995
XXII International conference on phenomena in ionized gases. Contributed papers 11995
AbstractAbstract
[en] Rotating arc circuit breakers are of increasing interest at present for a number of reasons. These relate to their perceived open-quote soft close-quote interruption capability and their potential for cost savings through low-energy operation. Such advantages have led to a growth in the application of rotating arc geometries to low voltage interrupters, from 11 to 25kV but also at medium voltage levels, such as the autopuffer. While it is known that rotating arcs must undergo some deformation as a result of their movement, the effects of such deformations have remained largely unreported. The aim of this paper is to present data on the deformation of a swiftly rotating arc column and the effect this has on the subsequent behaviour of the column. Far from being a steady-state problem, as it has previously been discussed, the arc column undergoes a continuous process of deformation and collapse, allowing it to move axially as well as azimuthally within the field coil
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Becker, K.H.; Carr, W.E.; Kunhardt, E.E. (eds.); 172 p; 1995; p. 61-62; Stevens Institute of Technology; Hoboken, NJ (United States); 22. international conference on phenomena in ionized gases; Hoboken, NJ (United States); 31 Jul - 4 Aug 1995
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AbstractAbstract
No abstract available
Original Title
Problems involving service water pump 4 KV breaker
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27 Dec 1973; 2 p; Published in summary form only.
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AbstractAbstract
No abstract available
Original Title
Moshchnyj impul'snyj vodorodnyj tiratron s kholodnym katodom
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Short note. For English translation see the journal Instruments and Experimental Techniques (USA).
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