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
Sự phóng điện bề mặt trong bộ cách điện tại giao diện chân không/dầu Dịch bởi AI
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 219-222
A. Sharma, S. Acharya, K.V. Nagesh, R.C. Sethi, G.R. Nagabhushana, U. Kumar
Dữ liệu thực nghiệm về sự phóng điện bề mặt trong polymethyl methacrylate (PMMA) tại giao diện dầu/chân không bằng các xung đầu vào tăng dần được trình bày. Bộ cách điện có hình nón cụt với chiều dài thay đổi từ 1 mm đến 3 mm và góc từ 70 độ đến 70 độ. Với độ dốc dV/dt của xung đầu vào, trường phóng điện thay đổi từ 30 kV/mm đến 10 kV/mm trong trường hợp phóng điện bề mặt chân không/chất rắn và từ...... hiện toàn bộ
#Sự phóng điện bề mặt #Dầu #Sạc bề mặt #Vật liệu cách điện và cách điện điện áp #Điện áp đổ vỡ #Electron #Đổ vỡ chân không #Mô hình rắn #Phát xạ thermionic #Phonon
Dielectric analysis of high voltage metalclad withdrawn switchgear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The breakthrough disruption under adverse circumstances in high voltage metalclad withdrawn switchgear had happened frequently because of its compact space size. In this paper, the dielectric properties of 12 kV high voltage metalclad withdrawn switchgear under three phase and impulse voltage excitation have been analyzed by calculating the electric field distribution.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
Removal of NO/sub x/ and SO/sub 2/ in plasma reactor with water film
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 423-426
Limin Dong, Shouguo Sheng, Lutao Liu, Jiaxiang Yang
SO/sub 2/ and NO/sub x/ have become serious air pollutants in such things as photochemical smog and acid rain. In spite of an attempt to reduce the amount of SO/sub 2/ and NO/sub x/ emitted, the density of SO/sub 2/ and NO/sub x/ in the atmosphere has remained on a stable level, or even become worse. Here, we designed a novel type of a water film corona discharge experiment model. The reactor is c...... hiện toàn bộ
#Rain #Electrodes #Flue gases #Voltage #Air pollution #Photochemistry #Atmosphere #Corona #Atmospheric modeling #Inductors
High-current vacuum arc appearance in nonhomogeneous axial magnetic field
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 380-383
A.M. Chaly, A.A. Logatchev, K.K. Zabello, S.M. Shkol'nik
The distribution of the spots over the cathode of high-current vacuum arc stabilized by axial magnetic field (AMF) has been investigated. AMF configuration has been varied from conventional "bell-shaped" to "magnetic barrier", where substantial AMF is created in the electrode edge virtually vanishing in the center. Complex effect of the AMF configuration on the behavior of cathode spots has been f...... hiện toàn bộ
#Vacuum arcs #Magnetic fields #Cathodes #Voltage #Electrodes #Current density #Anodes #Current distribution #Circuit breakers #Current supplies
Limiting electric strength of vacuum electrode systems including combined breakdown
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 190-193
V.A. Nevrovsky, L.A. Ryl'skaya
There exists three types of emission sites, eventually being a place of initiation of electric breakdown in vacuum switching devices with a screened insulator. Using electrostatic field calculations, potential breakdown paths, which start at the emission site in a vacuum interrupter, have been analyzed. Combined breakdown includes a breakdown path across two vacuum gaps and formation of flashover ...... hiện toàn bộ
#Vacuum breakdown #Vacuum systems #Electrodes #Electric breakdown #Breakdown voltage #Dielectrics and electrical insulation #Interrupters #Testing #Electrostatics #Flashover
Improved compact X-ray sources
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 576-579
A. Mozelev
Nowadays, the ecological purity requirement for the geophysical devices with radioisotopes sources stimulates research into other kinds of sources. In this connection, the sources of X-ray radiation represent an attractive alternative. Electron and ions acquire a high energy and produce X-rays with a relatively high efficiency by interaction with different materials. In this work, a principally ne...... hiện toàn bộ
#Coils #Energy storage #Pulse transformers #Power transformer insulation #Gamma rays #Electron tubes #Pulse generation #Anodes #Remote handling #Temperature
Dielectric strength of the vacuum interrupter sections after termination of the electric life
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 376-379
L. Rylskaya
The dielectric strength of the vacuum interrupter (VI) sections is studied after termination of the electric life. It is shown the reduction of the electric life occurs in particular cases and its reason is the appearance of more low voltage breakdowns called as "slow" because of increasing almost by an order the time of the voltage drop to zero during breakdown (several microseconds against fract...... hiện toàn bộ
#Dielectric breakdown #Interrupters #Circuit testing #Breakdown voltage #Vacuum breakdown #Dielectrics and electrical insulation #Electric breakdown #Vacuum arcs #Laboratories #Lightning
Sự tương quan giữa các nguyên tố hóa học trên bề mặt của vật liệu cách điện rắn và đặc tính phóng điện của chúng trong môi trường chân không Dịch bởi AI
20th International Symposium on Discharges and Electrical Insulation in Vacuum - - Trang 626-629
Guan-Jun Zhang, Xue Wang, Zhang Yan
Kỹ thuật phổ điện tử tia X (XPS) đã được sử dụng để phân tích các nguyên tố hóa học trên bề mặt của gốm alumina và polytetrafluoroethylene (PTFE) trong môi trường chân không cao. Trên bề mặt của các mẫu alumina, có các nguyên tố Al, Si, C và O, trong đó C chiếm tỷ lệ tối đa là 57,78%. Đối với các mẫu PTFE, các nguyên tố F, C, K và O đã được phát hiện, và F cho thấy tỷ lệ nguyên tử đáng kể là 73,30...... hiện toàn bộ
#Các nguyên tố hóa học #Vật rắn #Cách điện #Phóng điện #Phổ quang học #Phân tích hóa học #Gốm sứ #Công nghệ chân không #Electron #Điện môi
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