Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357295
Xiu Shi-xin, P. Lei, Wang Jimei, Li Jianfei, He Guangli
In order to develop high voltage and large capability vacuum circuit breaker, it is necessary to make sure that there is enough strong axial magnetic field even with long gap distance. In this paper, the magnetic field of those model at the long gap distance were calculated for the coil-type axial magnetic field electrode and the cup-type axial magnetic field electrode, the results show the axial magnetic field distribution on the midplane between the two electrodes, the effect of some electrode structure parameters and the relative position between the two electrodes on the axial magnetic field were studied. Based on the analysis of the results, a new electrode structure applied to high voltage vacuum interrupters was developed
{"title":"Analysis of Axial Magnetic Field electrode applied to high voltage Vacuum Interrupters","authors":"Xiu Shi-xin, P. Lei, Wang Jimei, Li Jianfei, He Guangli","doi":"10.1109/DEIV.2006.357295","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357295","url":null,"abstract":"In order to develop high voltage and large capability vacuum circuit breaker, it is necessary to make sure that there is enough strong axial magnetic field even with long gap distance. In this paper, the magnetic field of those model at the long gap distance were calculated for the coil-type axial magnetic field electrode and the cup-type axial magnetic field electrode, the results show the axial magnetic field distribution on the midplane between the two electrodes, the effect of some electrode structure parameters and the relative position between the two electrodes on the axial magnetic field were studied. Based on the analysis of the results, a new electrode structure applied to high voltage vacuum interrupters was developed","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129098951","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357414
H. Toya, K. Hieda, T. Saitou
Welding technology in space is required to repair the space station. Arc welding in vacuum should be more conventional than electron beam welding because of low voltage operation. Preliminary study on vacuum arc welding is presented in this paper. Arc was ignited by separating an arcing electrode (cathode) from the welding piece (anode). The former is composed of a rod with round tip, however the latter of a screw/nut set. Both of them are made of stainless-steal (SUS304). A pulsed-arc current up to approx. 3kA with duration of about 15-20ms was fed from a power supply that was consisted of a low-voltage LC circuit (135 muH/0.04F/550V) with a crowbar diode. The screw/nut seemed to be uniformly melted by eye. The tensile strength of the welded piece was measured after welding test. However it was low in comparison with a TIG welding piece performed in an atmospheric pressure. One-dimensional thermal conduction was analyzed in a finite welding piece. The calculated result showed that the melting depth could be over 1mm when the arc current flows for more than 10-15 times longer than that in this experiment. Further investigation is required to find appropriate conditions (arc current, arc discharge mode, welding material, etc) to realize satisfactory arc welding in vacuum
{"title":"Preliminary Study on Arc Welding in Vacuum","authors":"H. Toya, K. Hieda, T. Saitou","doi":"10.1109/DEIV.2006.357414","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357414","url":null,"abstract":"Welding technology in space is required to repair the space station. Arc welding in vacuum should be more conventional than electron beam welding because of low voltage operation. Preliminary study on vacuum arc welding is presented in this paper. Arc was ignited by separating an arcing electrode (cathode) from the welding piece (anode). The former is composed of a rod with round tip, however the latter of a screw/nut set. Both of them are made of stainless-steal (SUS304). A pulsed-arc current up to approx. 3kA with duration of about 15-20ms was fed from a power supply that was consisted of a low-voltage LC circuit (135 muH/0.04F/550V) with a crowbar diode. The screw/nut seemed to be uniformly melted by eye. The tensile strength of the welded piece was measured after welding test. However it was low in comparison with a TIG welding piece performed in an atmospheric pressure. One-dimensional thermal conduction was analyzed in a finite welding piece. The calculated result showed that the melting depth could be over 1mm when the arc current flows for more than 10-15 times longer than that in this experiment. Further investigation is required to find appropriate conditions (arc current, arc discharge mode, welding material, etc) to realize satisfactory arc welding in vacuum","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"80 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131626581","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357318
A. Sato, T. Iwao, M. Yumoto
Remarkable characteristic of cathode spot of low pressure arc can remove the oxide layer preferentially. Recently, cathode spot of low pressure arc have been used for cleaning metal oxide surface before the thermal spray or surface modification. However, there are few reports on the cathode spot movement or the oxide removal process. The experiment carried out by using the SS400 cathode work piece and the used cylindrical copper anode. The cathode spot movement taken by the high speed video camera is observed and analyzed by using the plasma image processing (PIP). The surfaces of work piece were covered with thick oxide of 9.67nm. The surface work piece of surface after processing was analyzed by using the laser microscope. The cathode spots movement has the difference as the processing time increases and the oxide layer roughness changes
{"title":"Cathode Spot Movement of Low Pressure Arc Removing Oxide Layer","authors":"A. Sato, T. Iwao, M. Yumoto","doi":"10.1109/DEIV.2006.357318","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357318","url":null,"abstract":"Remarkable characteristic of cathode spot of low pressure arc can remove the oxide layer preferentially. Recently, cathode spot of low pressure arc have been used for cleaning metal oxide surface before the thermal spray or surface modification. However, there are few reports on the cathode spot movement or the oxide removal process. The experiment carried out by using the SS400 cathode work piece and the used cylindrical copper anode. The cathode spot movement taken by the high speed video camera is observed and analyzed by using the plasma image processing (PIP). The surfaces of work piece were covered with thick oxide of 9.67nm. The surface work piece of surface after processing was analyzed by using the laser microscope. The cathode spots movement has the difference as the processing time increases and the oxide layer roughness changes","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133385378","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357331
D. Gentsch
Vacuum interrupters (VI) with specific high short circuit interruption ability are mostly equipped with the well known contact material based on copper and chromium. A review of different production techniques as well as behaviour and microstructure of commercially available materials is presented with emphasis on two of the predominantly applied methods. The contact material's switching performance strongly depends on it's mechanical properties, gas and element concentration evaluated for each batch of base material. The contacts microstructure is investigated using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). Switching performance is proven on standard Vis and the examination is held in a high performance lab by interrupting a sequence with a huge number of short circuit currents in accordance to the standards according IEC 62271-100. When conducting limitation tests at higher demands than required a ranking of material batches is presented. The study is based on standard contact material with a chromium content of 25 wt.% used on the transverse magnetic field (TMF) contact system. Derived from the results a very compact VI for a rating of 40.5 kV at 40 kA with increased specific performance is introduced
{"title":"Contact Material for Vacuum Interrupters based on CuCr with a Specific High Short Circuit Interruption Ability","authors":"D. Gentsch","doi":"10.1109/DEIV.2006.357331","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357331","url":null,"abstract":"Vacuum interrupters (VI) with specific high short circuit interruption ability are mostly equipped with the well known contact material based on copper and chromium. A review of different production techniques as well as behaviour and microstructure of commercially available materials is presented with emphasis on two of the predominantly applied methods. The contact material's switching performance strongly depends on it's mechanical properties, gas and element concentration evaluated for each batch of base material. The contacts microstructure is investigated using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). Switching performance is proven on standard Vis and the examination is held in a high performance lab by interrupting a sequence with a huge number of short circuit currents in accordance to the standards according IEC 62271-100. When conducting limitation tests at higher demands than required a ranking of material batches is presented. The study is based on standard contact material with a chromium content of 25 wt.% used on the transverse magnetic field (TMF) contact system. Derived from the results a very compact VI for a rating of 40.5 kV at 40 kA with increased specific performance is introduced","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116349539","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357342
Yuesheng Zheng, Zhongyi Wang, Zhiyuan Liu, Mengmeng Hao, Jimei Wang
Magnetic field characteristics of vacuum interrupter with cup type axial magnetic field (AMF) contacts where an iron ring is introduced are investigated by three dimensions finite element method. The results show that 1) Axial magnetic flux density at current peak increases greatly on iron area, while it decreases slightly on center area. With increase of gap distance, AMF keeps unchanged on non-iron area, while it decreases greatly on iron area. 2) Axial magnetic flux density at current zero increases greatly on iron area. With increase of gap distance, it decreases greatly. Influence of irons on AMF only takes place on iron area. 3) Phase shift time between AMF and source current becomes higher all over the contact area including iron area and non-iron area
{"title":"Influence of Irons on Magnetic Field Characteristics of Vacuum Interrupter with Cup type Axial Magnetic Field Contacts","authors":"Yuesheng Zheng, Zhongyi Wang, Zhiyuan Liu, Mengmeng Hao, Jimei Wang","doi":"10.1109/DEIV.2006.357342","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357342","url":null,"abstract":"Magnetic field characteristics of vacuum interrupter with cup type axial magnetic field (AMF) contacts where an iron ring is introduced are investigated by three dimensions finite element method. The results show that 1) Axial magnetic flux density at current peak increases greatly on iron area, while it decreases slightly on center area. With increase of gap distance, AMF keeps unchanged on non-iron area, while it decreases greatly on iron area. 2) Axial magnetic flux density at current zero increases greatly on iron area. With increase of gap distance, it decreases greatly. Influence of irons on AMF only takes place on iron area. 3) Phase shift time between AMF and source current becomes higher all over the contact area including iron area and non-iron area","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115216581","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357335
A. Chaly, I. N. Poluyanova
An analysis of switching processes at interruption of lightly loaded urban and rural networks with the aid of VCB has been provided. It has been found that typical loading of the distribution feeders result in virtual absence of recovery voltage shift being the main reason for non-sustained disruptive discharges (NSDD). Truly unloaded situation is interruption of section located between neighbouring points of isolation in cable line, but 95% of lengths of these sections are less than 3km that is substantially shorter than ~50km lengths considered by standard. This difference results in different duration of current pulses relevant for VCB closing in real and test cases. Estimation of the probability of contact micro welding has shown that in real case probability of contact welding is much lowers which results in lower probability of NSDD. On the basis of the above irrelevancy of the current IEC requirement with regard to general purpose VCB has been stated. Alternative test procedure for special purpose VCB has also been offered
{"title":"Relevancy of IEC Requirements Related to Switching Cable and Line Charging Currents for Medium Voltage Vacuum Circuit Breakers (VCB)","authors":"A. Chaly, I. N. Poluyanova","doi":"10.1109/DEIV.2006.357335","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357335","url":null,"abstract":"An analysis of switching processes at interruption of lightly loaded urban and rural networks with the aid of VCB has been provided. It has been found that typical loading of the distribution feeders result in virtual absence of recovery voltage shift being the main reason for non-sustained disruptive discharges (NSDD). Truly unloaded situation is interruption of section located between neighbouring points of isolation in cable line, but 95% of lengths of these sections are less than 3km that is substantially shorter than ~50km lengths considered by standard. This difference results in different duration of current pulses relevant for VCB closing in real and test cases. Estimation of the probability of contact micro welding has shown that in real case probability of contact welding is much lowers which results in lower probability of NSDD. On the basis of the above irrelevancy of the current IEC requirement with regard to general purpose VCB has been stated. Alternative test procedure for special purpose VCB has also been offered","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"249 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124721452","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357373
Y. Sung, T. Yuji, T. Sakoda
Characteristics of radio-frequency (RF) plasma-enhanced vapor deposition (PE-CVD) for the growth of carbon nanotubes (CNTs) in a CH 4/N2 mixed gas were investigated through characterization of the prepared CNTs and a numerical simulation. The preparation of the CNTs was performed by the single chamber plasma process where the catalyst sputter deposition using a capacitively coupled plasma (CCP) and the PE-CVD using an inductively coupled plasma were carried out in the same discharge chamber. The plasma chemistry which is useful for optimizing preparation conditions was evaluated using the numerical code which could calculate the temporal evolution of particle densities in the plasma. The results showed the usefulness of the single chamber process system. It was also found that CH4, HCN and C2H6 radicals mainly contributed to the growth of CNTs
{"title":"RF PE-CVD Characteristics for the Growth of Carbon Nanotubes in a CH4/N2 mixed gas","authors":"Y. Sung, T. Yuji, T. Sakoda","doi":"10.1109/DEIV.2006.357373","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357373","url":null,"abstract":"Characteristics of radio-frequency (RF) plasma-enhanced vapor deposition (PE-CVD) for the growth of carbon nanotubes (CNTs) in a CH 4/N2 mixed gas were investigated through characterization of the prepared CNTs and a numerical simulation. The preparation of the CNTs was performed by the single chamber plasma process where the catalyst sputter deposition using a capacitively coupled plasma (CCP) and the PE-CVD using an inductively coupled plasma were carried out in the same discharge chamber. The plasma chemistry which is useful for optimizing preparation conditions was evaluated using the numerical code which could calculate the temporal evolution of particle densities in the plasma. The results showed the usefulness of the single chamber process system. It was also found that CH4, HCN and C2H6 radicals mainly contributed to the growth of CNTs","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128586392","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357412
H. Fujii, I. Kanja, T. Hasegawa, H. Osuga, K. Matsui
This paper deals with the surface flashover characteristics of dielectric material during electron beam irradiation in vacuum in order to design the conductive patterns on printed circuit boards used inside a spacecraft adequately. The dielectric material and the electrodes printed on it were irradiated with electrons of the energy of 3-10keV. DC high voltage was applied between the two electrodes during electron irradiation. The voltage was increased step-wisely until the surface flashover occurred on the dielectric. We obtained the result that the surface flashover voltage increased with the insulation distance between the electrodes. However, electron irradiation caused the flashover voltage to lower. The flashover voltage characteristics were obtained as parameters of the electrode distance and the energy of the electron beam
{"title":"Surface Flashover on Printed Circuit Boards in Vacuum under Electron Beam Irradiation","authors":"H. Fujii, I. Kanja, T. Hasegawa, H. Osuga, K. Matsui","doi":"10.1109/DEIV.2006.357412","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357412","url":null,"abstract":"This paper deals with the surface flashover characteristics of dielectric material during electron beam irradiation in vacuum in order to design the conductive patterns on printed circuit boards used inside a spacecraft adequately. The dielectric material and the electrodes printed on it were irradiated with electrons of the energy of 3-10keV. DC high voltage was applied between the two electrodes during electron irradiation. The voltage was increased step-wisely until the surface flashover occurred on the dielectric. We obtained the result that the surface flashover voltage increased with the insulation distance between the electrodes. However, electron irradiation caused the flashover voltage to lower. The flashover voltage characteristics were obtained as parameters of the electrode distance and the energy of the electron beam","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128024878","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357394
T. Matsuda, T. Sato, H. Motomura, M. Jinno
Nitrogen is known as a gas that has many emission spectra in ultraviolet region named 2nd positive band and they are thought to be suitable for phosphor excitation instead of harmful mercury. However, a molecular gas in a discharge has a tendency to get a high temperature because energy is stored as vibrational and rotational energy. This is a serious problem when the nitrogen discharge is used for light sources. Moreover, nitrogen requires fairy higher voltage to ignite and maintain a discharge compared with mercury-argon mixture. Because argon metastable levels (11.5 eV and 11.7 eV) lie near nitrogen C3IIu level (11.05 eV), which is upper state of 2nd positive band, energy transfer from argon metastable to nitrogen C 3IIu state is expected in the nitrogen-argon discharge. By limiting the amount of nitrogen to small portion, which is like a relationship between mercury and argon as a Penning gas, the discharge becomes stable and the temperature decrease, whereas the positive column of pure nitrogen or pure argon discharge tend to shrink and the pure nitrogen discharge have a high temperature. This result is attributed to the efficient energy flow to the C3IIu level through the energy transfer mentioned above. However, there is another problem that the amount of nitrogen molecule decreases during discharge, possibly by adsorption of nitrogen to the wall of discharge tube or the electrodes, which is confirmed from decrease in intensity of nitrogen molecule emission. The mechanisms of decrease in nitrogen molecule are under investigation
{"title":"Penning-like Energy Transfer between Argon and Nitrogen","authors":"T. Matsuda, T. Sato, H. Motomura, M. Jinno","doi":"10.1109/DEIV.2006.357394","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357394","url":null,"abstract":"Nitrogen is known as a gas that has many emission spectra in ultraviolet region named 2nd positive band and they are thought to be suitable for phosphor excitation instead of harmful mercury. However, a molecular gas in a discharge has a tendency to get a high temperature because energy is stored as vibrational and rotational energy. This is a serious problem when the nitrogen discharge is used for light sources. Moreover, nitrogen requires fairy higher voltage to ignite and maintain a discharge compared with mercury-argon mixture. Because argon metastable levels (11.5 eV and 11.7 eV) lie near nitrogen C3IIu level (11.05 eV), which is upper state of 2nd positive band, energy transfer from argon metastable to nitrogen C 3IIu state is expected in the nitrogen-argon discharge. By limiting the amount of nitrogen to small portion, which is like a relationship between mercury and argon as a Penning gas, the discharge becomes stable and the temperature decrease, whereas the positive column of pure nitrogen or pure argon discharge tend to shrink and the pure nitrogen discharge have a high temperature. This result is attributed to the efficient energy flow to the C3IIu level through the energy transfer mentioned above. However, there is another problem that the amount of nitrogen molecule decreases during discharge, possibly by adsorption of nitrogen to the wall of discharge tube or the electrodes, which is confirmed from decrease in intensity of nitrogen molecule emission. The mechanisms of decrease in nitrogen molecule are under investigation","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130331495","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}
Pub Date : 2006-09-01DOI: 10.1109/DEIV.2006.357270
E. V. Lanen, R. Smeets, M. Popov, L. V. D. Sluis
High resolution measurements on the post-arc current in vacuum circuit breakers reveal a period, immediately following current-zero, in which the voltage remains practically zero. The most widely used model for simulating the interaction between the post-arc current with the electrical circuit lacks a proper explanation for this event, and hence it needs to be complemented. We demonstrate that the breaker's electrical behaviour during this zero-voltage period can be explained by using the theory of a Langmuir probe. Such probes are used to investigate plasma properties, such as the ion density and the electron temperature, and we extrapolate its theory to the vacuum circuit breaker. The simulation results obtained with this model are in good agreement with measured data
{"title":"Current-Zero Characteristics of a Vacuum Circuit Breaker at Short-Circuit Current Interruption","authors":"E. V. Lanen, R. Smeets, M. Popov, L. V. D. Sluis","doi":"10.1109/DEIV.2006.357270","DOIUrl":"https://doi.org/10.1109/DEIV.2006.357270","url":null,"abstract":"High resolution measurements on the post-arc current in vacuum circuit breakers reveal a period, immediately following current-zero, in which the voltage remains practically zero. The most widely used model for simulating the interaction between the post-arc current with the electrical circuit lacks a proper explanation for this event, and hence it needs to be complemented. We demonstrate that the breaker's electrical behaviour during this zero-voltage period can be explained by using the theory of a Langmuir probe. Such probes are used to investigate plasma properties, such as the ion density and the electron temperature, and we extrapolate its theory to the vacuum circuit breaker. The simulation results obtained with this model are in good agreement with measured data","PeriodicalId":369861,"journal":{"name":"2006 International Symposium on Discharges and Electrical Insulation in Vacuum","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129289693","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}
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