20th International Symposium on Discharges and Electrical Insulation in Vacuum

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On statistics of dielectric strength of triggered vacuum switches
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 194-197
D.F. Alferov, V.A. Nevrovsky, V.A. Sidorov
The paper deals with experimental tests of dielectric strength of triggered vacuum switches (TVS). The dielectric strength was measured applying AC high voltage to a switch after several commutations of current in the TVS. Two approaches to determine a breakdown probability curve were used in the tests. Taking into account practical considerations, the main body of experimental results was obtaine...... hiện toàn bộ
#Statistics #Dielectric breakdown #Switches #Testing #Breakdown voltage #Electric breakdown #Electrodes #Current measurement #Dielectric measurements #Tail
Effect of mechanical polish of electrode on several breakdown characteristics of vacuum gap
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 427-430
S. Sato, K. Koyama
For the purpose of controlling conductor surface roughness, relationships between breakdown voltage of vacuum gaps and electrode surface roughness were discussed The roughness of mechanically polished Cu and CuCr electrodes were measured by a roughness meter. Experimental formula between breakdown voltage and surface roughness were obtained for plate-to-plate gaps of both Cu and CuCr electrodes. I...... hiện toàn bộ
#Vacuum breakdown #Electrodes #Rough surfaces #Surface roughness #Surface discharges #Surface treatment #Voltage control #Conductors #Mechanical variables measurement #Cathodes
Feasilbility study on application of high voltage and high power vacuum circuit breaker
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 275-278
H. Okubo, S. Yanabu
Because of global warming effects, instead of the SF/sub 6/ gas circuit breaker (GCB), the vacuum circuit breaker (VCB) is considered for use for high voltage and high power circuit breaker and switchgear and it is considered that VCB will be used in these application, though some research and development will be necessary.
#Voltage #Sulfur hexafluoride #Circuit breakers #Electrodes #Vacuum technology #Geographic Information Systems #Gas insulation #Testing #Global warming #Costs
Future trends in vacuum technology applications
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 25-29
H. Fink, R. Renz
In the medium voltage range the vacuum switching principle is well established. Today vacuum circuit breakers are available up to 52 kV rated voltage and 80 kA short-circuit current. Based on long term experiences and knowledge from basic research development there is a clear progress into lower and higher voltage ranges and highest interrupting capabilities. In addition to expansion of ratings al...... hiện toàn bộ
#Vacuum technology #Magnetic fields #Medium voltage #Contacts #Interrupters #Circuit breakers #Electron tubes #Power generation #Vacuum systems #Magnetic switching
HV dielectric strength of shielding electrodes in vacuum circuit-breakers
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 119-122
S. Giere, M. Kurrat, U. Schumann
The subject of this paper is the HV dielectric strength of shielding and field-grading electrodes in vacuum circuit-breakers. It describes the effects exerted by various geometrical parameters, the surface area and the material of the shielding on the breakdown behavior of shielding. The experiments were performed with a shielding electrodes model and were carried out under lightning impulse volta...... hiện toàn bộ
#Dielectric breakdown #Electrodes #Circuits #Voltage #Vacuum systems #Solid modeling #Testing #Elementary particle vacuum #Vacuum technology #Dielectric materials
Studies of moment aberrations in magneto-electrostatic plasma lenses
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 186-189
V.I. Butenko, B.I. Ivanov
In this work it is shown that in magneto-electrostatic plasma lenses moment aberrations obey the law of conservation of generalized angular moment of the charged particle to be focused. They disappear when the particle source is placed in a zero magnetic field; geometrical aberrations can be removed by choice of the optimal electric field intensity distribution. In the case considered, the proton ...... hiện toàn bộ
#Magnetic moments #Lenses #Magnetic fields #Particle beams #Electrostatics #Plasma devices #Plasma properties #Plasma density #Ion beams #Magnetic separation
Proceedings 20th ISDEIV. 20th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No. 02CH37331)
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - 2002
Presents the front cover of the proceedings record.
Soft X-ray emission in a low-current, repetitive vacuum arc
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 299-302
T. Yanagidaira, N. Daiji, H. Abiko, H. Miura, K. Tsuruta
Soft X-ray emission from a short vacuum gap, operated with arc discharges with a repetitive period of 1-10 microseconds and the peak current of 200 A, was investigated. It was found that the soft X-ray was emitted during the arc phase and in the period between the arc extinction and the subsequent breakdown. The current density at the time of X-ray emission is >10/sup 7/ A/m/sup 2/ at an operating...... hiện toàn bộ
#Vacuum arcs #X-ray imaging #Cathodes #Filters #Electrodes #Low voltage #Current density #Fault location #Anodes #Cameras
High-current vacuum arcs on magnetic field contacts: electrical, spectroscopic and contact temperature investigations
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 170-173
D. Pavelescu, V. Braic, G. Dumitrescu, F. Gherendi, M. Braic, G. Pavelescu, P. Anghelita, M. Stefan
The paper deals with the electric arc phenomena in a low voltage circuit breaker in order to improve the breaking capability. Electrical and thermal parameters were measured in the high current arc period and in the zero current moment (CZ) and corroborated with the arc plasma spectroscopic investigations. Considerations concerning successful or unsuccessful high current interruption are presented...... hiện toàn bộ
#Contacts #Vacuum arcs #Magnetic fields #Spectroscopy #Magnetic field measurement #Plasma temperature #Plasma measurements #Low voltage #Circuit breakers #Current measurement
Explosive emission cathodes for production of microsecond large cross-section electron beams
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 364-367
E.N. Abdullin, G.P. Bazhenov, A.V. Morozov
Data concerning emissive properties of cathodes with a smooth emitting surface versus material of coating and cathode base are presented. The base material influence on the emissive cathode properties is shown. Operation mechanism of cathodes with a smooth emitting surface is discussed.
#Explosives #Cathodes #Production #Electron beams #Diodes #Coatings #Fabrics #Current density #Low voltage #Surface discharges
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