XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.最新文献_第8页

Analyses on insulation performance of breaking processes for vacuum circuit breaker 真空断路器分断过程绝缘性能分析

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422692

Xiaoming Liu, Yundong Cao, Erzhi Wang, Lei Li

引用次数: 1

Influence of work function variation on metal surface cleianing by vacuum arc discharge 功函数变化对真空电弧清理金属表面的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422682

M. Sugimoto, K. Takeda

引用次数: 0

Design on permanent magnet actuator and simulation of dynamic characteristic for vacuum circuit breaker 真空断路器永磁作动器设计及动态特性仿真

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422704

Cao Yundong, Hou Chunguang, L. Xiaoming, Wang Er-zhi

引用次数: 4

Transition mode of the vacuum arc in an axial magnetic field: comparison of experimental results and theory 真空电弧在轴向磁场中的过渡模式:实验结果与理论比较

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/deiv.2004.1418637

E. Taylor, M. Keidar

{"title":"Transition mode of the vacuum arc in an axial magnetic field: comparison of experimental results and theory","authors":"E. Taylor, M. Keidar","doi":"10.1109/deiv.2004.1418637","DOIUrl":"https://doi.org/10.1109/deiv.2004.1418637","url":null,"abstract":"The transition mode for drawn vacuum arcs in an axial magnetic field (AMF) occurred over a few milliseconds during the evolution from the initial bridge column arc to the diffuse arc mode. This dynamic period of arc evolution could be studied using a diffuse column arc model for the behavior of individual cathode spot jets burning in parallel with a high-current arc column. The model calculated a critical arc voltage, above which the sign of the anode sheath for the individual spots changed from negative to positive with respect to the inter-contact plasma. In this case, the individual jet could continue burning only if the anode supplied B significant fraction of its near-anode plasma. This change could hinder the existence of individual cathode spot jets outside the column. Experimental observations of the transition mode showed that when the arc voltage exceeded the critical voltage, the arc was in one of two modes. The lint mode consisted of a central column with few or no cathode spots outside the column, and the second involved the appearance of some cathode spots outside the column. When the arc voltage dropped below the critical voltage, the arc converted into a high-current diffuse mode. The diffuse column model can be used to explain the observed transition mode behavior. Cathode spots could freely burn over the cathode surface when the arc voltage was less than the critical voltage because of the change in sign of the anode sheath. This could divert current out of the arc column, thereby lowering the magnetic pinch pressure on the column and causing it to collapse. The theoretical predictions of the critical voltage agreed well with the observed transition to a high-current diffuse mode for AC currents ranging from 5-28 kA rms and axial magnetic field strengths from 2.5-7.5 mT/kA.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133376001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

The influence of CuCr25 characteristics on the interruption capability of vacuum interrupters CuCr25特性对真空灭弧器中断能力的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422620

M. Devismes, H. Schellekens, P. Picot, S. Olive, A. Henon, J. Ponthenier, M. Boutillier

{"title":"The influence of CuCr25 characteristics on the interruption capability of vacuum interrupters","authors":"M. Devismes, H. Schellekens, P. Picot, S. Olive, A. Henon, J. Ponthenier, M. Boutillier","doi":"10.1109/DEIV.2004.1422620","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1422620","url":null,"abstract":"This paper presents an extended survey on the influence of material characteristics of CuCr2S on the overall performance of Axial Magnetic Field Vacuum Interrupters (VI'S). Three distinct production processes are used to manufacture this material which can be discriminated by the maximum operating temperature; these processes are : solid state sintering (Tmax = 1050°C) , liquid stale sintering (Tmax = 1200°C) and melting (Tmin = 1600°C). In this way materials with varying density (95% - 99.9%) and conductivity (23 MS/m - 34 MS/m) are obtained. These materials are characterised for their welding strength, chopping current, cold dielectric behaviour, interruption performance and gas content. The materials are tested as 20 mm diameter flat contacts in an asymmetrical V1 with external axial magnetic field coil. Short circuit interruption performance was highly dependent on the production process. We performed our tests at a short circuit current of about 10 kA in a strong AMF (15 mT/kA) and at a recovery voltage of 12 kV (TRV peak 21 kV). Under these conditions most materials interrupt the current but produce late to very late breakdowns. We correlate this behaviour to the above mentioned material characteristics, the gas and impurity content of the contacts and arc erosion products. We conclude that the solid stale sintering process yields a reliable and economical CuCr25 contact material with good overall performance in axial magnetic field VI's.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132668526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Effect of space charge on electric field for a vacuum interrupter 空间电荷对真空灭流器电场的影响

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422703

Xiaoming Liu, Yundong Cao, Erzhi Wang, H. Jia

引用次数: 0

Hardening of carbonaceous and alloyed steels by low energy nitrogen ions irradiation in arc discharge plasma 低能氮离子辐照电弧放电等离子体硬化碳质及合金钢的研究

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422685

V. Belous, G. I. Nosov

{"title":"Hardening of carbonaceous and alloyed steels by low energy nitrogen ions irradiation in arc discharge plasma","authors":"V. Belous, G. I. Nosov","doi":"10.1109/DEIV.2004.1422685","DOIUrl":"https://doi.org/10.1109/DEIV.2004.1422685","url":null,"abstract":"Effect of low energy nitrogen ions irradiation in arc discharge plasma on structure and properties of a surface carbonaceous and alloyed steels (U8, St.30, PhVG, Ph12M, 5PhNV) was studied. The ion irradiation of steel specimens was performed vacuum facility with a triode gas plasma source based on thermionic cathode arc discharge ignited in atmosphere of pure nitrogen at low pressure. The nitrogen ions bombarded steel specimens surface carried out an energy 600 eV. The pressure of nitrogen at ion irradiation was 0,9...2 Pa. The temperature of irradiated specimens was not above 520°C. Studies were made into the structure, composition and microhardness of irradiated carbonaceous and alloyed steel specimens. Metallographic, X-ray diffraction and electron-microscope methods were used to investigate the surfaces of irradiated specimens. It is founded that microhardness of irradiated steel specimens surface increases by factors of 1.8 to 3. The thickness of strengthened layer reaches 80 ... 100 microns. Unstrengthening of bulk after nitrogen ions irradiation took place for carbonaceous steels with low heat resistance (U8, St.30). The bulk of material exhibits practically no unstrengthening after ion irradiation of alloyed steels with high heat resistance (PhVG, Ph12M, 5PhNV). The X-ray diffraction analysis performed for irradiated steels by nitrogen ions points presence of Fe 2-3/N (ϵ-phase), Fe4N (γ-phase) and carbide phase in most cases. Wear resistant and life-in-service of steel tools after nitrogen ions irradiation (U8, PhVG) were increased by factors of 2 or 3.","PeriodicalId":137370,"journal":{"name":"XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126227012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of conditions of formation of a stationary big section beam in plasma electron sources 等离子体电子源中固定大截面光束形成条件的模拟

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422671

O. N. Petrovich

引用次数: 0

Optimum assignment of component tolerances for actuator of vacuum circuit breaker 真空断路器执行机构元件公差的优化分配

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422700

Wang Er-zhi, Chen Gang, Sun Bo

引用次数: 1

Model of thermal and stressed state of material and cutting tool at plasma-machine treatment 等离子体机处理时材料和刀具的热应力状态模型

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV. Pub Date : 1900-01-01 DOI: 10.1109/DEIV.2004.1422663

G. Kostyuk, E. Voliak

引用次数: 0