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
Dielectric analysis of high voltage metalclad withdrawn switchgear
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 515-518
Lianhong Wei, Erzhi Wang, Yundong Cao, Youhua Gao
The breakthrough disruption under adverse circumstances in high voltage metalclad withdrawn switchgear had happened frequently because of its compact space size. In this paper, the dielectric properties of 12 kV high voltage metalclad withdrawn switchgear under three phase and impulse voltage excitation have been analyzed by calculating the electric field distribution. Through investigation, the m...... hiện toàn bộ
#Voltage #Switchgear #Dielectrics and electrical insulation #Laplace equations #Space technology #Educational institutions #Dielectric measurements #Power measurement #Power system economics #Power generation economics
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
Triggering of pseudospark switches
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 592-594
V.D. Bochkov, D.V. Botchkov, V.M. Dyagilev, V.N. Kudinov, I.A. Ratchkov, V.G. Ushich, N.M. Vereschagin
Investigations of direct (DAD) and pulse auxiliary discharge (PAD) effects on temporal characteristics and voltage drop of cold cathode thyratrons (pseudospark switches) TPI-types are carried out. The described investigations were aimed to obtain reduced energy losses in the discharge and minimize switching time. The tests were carried out in a mode with anode voltage 3-20 kV, at anode peak curren...... hiện toàn bộ
#Atherosclerosis #Cathodes #Thyratrons #Switches #Anodes #Energy loss #Testing #Delay #Voltage control #Jitter
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.
A model of cathode spot motion in a transverse magnetic field
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 154-157
I.I. Beilis
A spot grouping and retrograde motion model based on previous study of the cathode thermal regime and the plasma flow in the near cathode region is proposed. The current per group spot is calculated by assuming that the plasma kinetic pressure is comparable to the self-magnetic pressure in the acceleration region of plasma jet. The results of the calculations indicate a linear increase of the curr...... hiện toàn bộ
#Cathodes #Magnetic fields #Plasma density #Plasma confinement #Plasma materials processing #Plasma temperature #Breakdown voltage #Plasma sheaths #Magnetic confinement #Plasma accelerators
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