Pub Date : 2016-09-01DOI: 10.1109/DEIV.2016.7764025
E. Oks, V. Gushenets, A. Bugaev, A. Goncharov, A. Dobrovolskiy, I. Litovko
This is a brief review of last results of ongoing research of the new generation plasma optic devices on base of wide aperture cylindrical electrostatic plasma lens, that open up novel possibility for effective practical applications in modern high-tech. The most attractive new applications are removing microparticles from vacuum arc plasma stream as well as focusing large-area intensive electron beams of average energy.
{"title":"Space charge plasma optic devices: New applications in vacuum arc technology","authors":"E. Oks, V. Gushenets, A. Bugaev, A. Goncharov, A. Dobrovolskiy, I. Litovko","doi":"10.1109/DEIV.2016.7764025","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7764025","url":null,"abstract":"This is a brief review of last results of ongoing research of the new generation plasma optic devices on base of wide aperture cylindrical electrostatic plasma lens, that open up novel possibility for effective practical applications in modern high-tech. The most attractive new applications are removing microparticles from vacuum arc plasma stream as well as focusing large-area intensive electron beams of average energy.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128539041","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7763976
Wu Wen-geng, Fang Chun-en, Li Wei, Zhang Bi-de, Ren Xiao, Luo Yan
The development of a large-scale HVDC power grid requires a reliable, fast and low-loss hybrid HVD circuit breaker. The high speed disconnect switch is an essential part of hybrid HVDC circuit breaker concept. The objective of this paper is to design an electromagnetic repulsion mechanism for high speed vacuum disconnect switch of a hybrid HVDC circuit breaker and meet the premise that the motion distance of the moving contact is larger than 10mm in the first 2ms. A multi-physics FEM simulation model that can predict the dynamic characteristics of high speed vacuum disconnect switch with a high degree of accuracy is developed. The parameters of the electromagnetic repulsion mechanism are analyzed and a brute force optimization algorithm is implemented to obtain the optimal model of the electromagnetic repulsion force mechanism. The developed model was validated experimentally with a built a high speed vacuum disconnect switch prototype and the results show that the proposed model can be used to accurately predict the performances of high speed vacuum disconnect switch.
{"title":"Design and experimental investigation on the electromagnetic repulsion mechanism of high speed vacuum disconnect switch","authors":"Wu Wen-geng, Fang Chun-en, Li Wei, Zhang Bi-de, Ren Xiao, Luo Yan","doi":"10.1109/DEIV.2016.7763976","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763976","url":null,"abstract":"The development of a large-scale HVDC power grid requires a reliable, fast and low-loss hybrid HVD circuit breaker. The high speed disconnect switch is an essential part of hybrid HVDC circuit breaker concept. The objective of this paper is to design an electromagnetic repulsion mechanism for high speed vacuum disconnect switch of a hybrid HVDC circuit breaker and meet the premise that the motion distance of the moving contact is larger than 10mm in the first 2ms. A multi-physics FEM simulation model that can predict the dynamic characteristics of high speed vacuum disconnect switch with a high degree of accuracy is developed. The parameters of the electromagnetic repulsion mechanism are analyzed and a brute force optimization algorithm is implemented to obtain the optimal model of the electromagnetic repulsion force mechanism. The developed model was validated experimentally with a built a high speed vacuum disconnect switch prototype and the results show that the proposed model can be used to accurately predict the performances of high speed vacuum disconnect switch.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"285 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116371557","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7748699
Jinqiang Huang, G. Ge, M. Liao, X. Duan, L. Pu, J. Zou
The paper focuses on the current commutation between the vacuum arc and the IGBTs of DC micro-grid hybrid circuit breakers (HCB). The principle of the DC HCB is analyzed and the current commutation is the important process in DC HCB interruption, on which the arcing time and the interrupting time are depended. The test circuit of the current commutation is established by simplifying the parallel-connected IGBTs to an on-state resistance with large thermal capacity. The influence of the magnitude of the main current, the resistance of the IGBTs and the externally applied transverse magnetic field (TMF) on the current commutation is investigated by the electrical measure and the development of vacuum arc which is observed by a high speed CMOS camera. The mathematic description of the current commutation is obtained. The interaction between the vacuum arc commutation and the externally applied TMF is discussed. The paper provides the bases on the optimal design and control strategy of DC HCB.
{"title":"The current commutation characteristics of DC micro-grid hybrid circuit breakers","authors":"Jinqiang Huang, G. Ge, M. Liao, X. Duan, L. Pu, J. Zou","doi":"10.1109/DEIV.2016.7748699","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748699","url":null,"abstract":"The paper focuses on the current commutation between the vacuum arc and the IGBTs of DC micro-grid hybrid circuit breakers (HCB). The principle of the DC HCB is analyzed and the current commutation is the important process in DC HCB interruption, on which the arcing time and the interrupting time are depended. The test circuit of the current commutation is established by simplifying the parallel-connected IGBTs to an on-state resistance with large thermal capacity. The influence of the magnitude of the main current, the resistance of the IGBTs and the externally applied transverse magnetic field (TMF) on the current commutation is investigated by the electrical measure and the development of vacuum arc which is observed by a high speed CMOS camera. The mathematic description of the current commutation is obtained. The interaction between the vacuum arc commutation and the externally applied TMF is discussed. The paper provides the bases on the optimal design and control strategy of DC HCB.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116950707","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7748720
Cong Wang, Z. Shi, Bingzhou Wu, S. Jia, Lijun Wang
In this paper, the characteristic of the lifetime of CS of vacuum arc with single CS in external axial magnetic field (AMF) up to 220mT is investigated experimentally at a constant arc current of 20A. Experiments are conducted with Cu and CuCr25 butt contacts in a demountable vacuum chamber. The uniform constant AMF (Bn) within the inter-contacts region is supplied by Nd-Fe-B permanent magnets. The arc voltage are measured by a high-voltage probe respectively, and recorded by an oscilloscope with a sample rate of 1.25GS/s, i.e., a time resolution of 0.8ns. The influence of AMF on the lifetime of CS is mainly investigated through a statistical analysis on the oscillation of arc voltage caused by the extinguishment of an old CS and the formation of a new CS. Experimental results show that the lifetime of CS exhibited a distribution similar to a Gaussian distribution, where its average value is approximately ranging from 80ns to 110ns under applied AMFs. Result also indicated that, the average lifetimes of CS of both Cu and CuCr25 electrodes increase significantly with Bn in a certain range of external AMF, e.g., 0≤Bn≤60mT, after which it decrease slowly with further increase of external AMF (60mT ≤Bn≤220mT). In addition, the average lifetime of CS of CuCr25 electrode is longer that of Cu electrode.
{"title":"Experimental investigation on the influence of axial magnetic field on the lifetime of cathode spot of vacuum arc","authors":"Cong Wang, Z. Shi, Bingzhou Wu, S. Jia, Lijun Wang","doi":"10.1109/DEIV.2016.7748720","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748720","url":null,"abstract":"In this paper, the characteristic of the lifetime of CS of vacuum arc with single CS in external axial magnetic field (AMF) up to 220mT is investigated experimentally at a constant arc current of 20A. Experiments are conducted with Cu and CuCr25 butt contacts in a demountable vacuum chamber. The uniform constant AMF (Bn) within the inter-contacts region is supplied by Nd-Fe-B permanent magnets. The arc voltage are measured by a high-voltage probe respectively, and recorded by an oscilloscope with a sample rate of 1.25GS/s, i.e., a time resolution of 0.8ns. The influence of AMF on the lifetime of CS is mainly investigated through a statistical analysis on the oscillation of arc voltage caused by the extinguishment of an old CS and the formation of a new CS. Experimental results show that the lifetime of CS exhibited a distribution similar to a Gaussian distribution, where its average value is approximately ranging from 80ns to 110ns under applied AMFs. Result also indicated that, the average lifetimes of CS of both Cu and CuCr25 electrodes increase significantly with Bn in a certain range of external AMF, e.g., 0≤Bn≤60mT, after which it decrease slowly with further increase of external AMF (60mT ≤Bn≤220mT). In addition, the average lifetime of CS of CuCr25 electrode is longer that of Cu electrode.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114428482","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}
In the tendency of high capacity and structure miniaturization, 40.5kV solid insulation vacuum circuit breakers have been widely used in electrical distribution networks. In order to investigate the effect of the grounded shield on insulating performance, the electric field distribution of a solid insulation vacuum circuit breaker was calculated by finite element analysis software. Taking a 40.5kV solid insulation vacuum circuit breaker for example, the electric field distribution of some critical areas was concerned such as the area near main shield. Meanwhile, the electric field distribution between the embedded pole and the earth is presented. The results showed that the grounded shield might aggravate the electric field strength inside the embedded pole. The effect on the electric field in the vacuum interrupter was calculated and the grounded shield might increase the electric field intensity. The comparison results are available for reference to optimization design of insulating structure for a 40.5kV solid insulation vacuum circuit breaker.
{"title":"Effect of grounded shield on electric field distribution for solid insulation vacuum circuit breaker","authors":"Shilei Guan, Shaigen Han, Hui Yin, X. Bai, Tong Wang, Jing Yan","doi":"10.1109/DEIV.2016.7764000","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7764000","url":null,"abstract":"In the tendency of high capacity and structure miniaturization, 40.5kV solid insulation vacuum circuit breakers have been widely used in electrical distribution networks. In order to investigate the effect of the grounded shield on insulating performance, the electric field distribution of a solid insulation vacuum circuit breaker was calculated by finite element analysis software. Taking a 40.5kV solid insulation vacuum circuit breaker for example, the electric field distribution of some critical areas was concerned such as the area near main shield. Meanwhile, the electric field distribution between the embedded pole and the earth is presented. The results showed that the grounded shield might aggravate the electric field strength inside the embedded pole. The effect on the electric field in the vacuum interrupter was calculated and the grounded shield might increase the electric field intensity. The comparison results are available for reference to optimization design of insulating structure for a 40.5kV solid insulation vacuum circuit breaker.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125583718","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7748671
D. Hwangbo, S. Kajita, N. Ohno, D. Sinelnikov
Field emission properties on several different metal surfaces irradiated with helium plasmas were measured. Field emission currents from nanostructure, pinhole, and loop-like tantalum surfaces were significantly higher than that from polished tantalum (Ta) surface. Before and after the micro-breakdown, where the current density was under ~1 μA/mm2, field enhancement factor showed slight increase. On the other hand, significant increase of field enhancement factor was measured after breakdown, where the current density increased up to ~100 μA/mm2. In the scanning electron microscope observation, melted cathode spots were detected. The increment of field enhancement factor after the breakdown may be induced by thermo-field electron emission from the melted spots.
{"title":"Field electron emission from metal surfaces irradiated with helium plasmas","authors":"D. Hwangbo, S. Kajita, N. Ohno, D. Sinelnikov","doi":"10.1109/DEIV.2016.7748671","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748671","url":null,"abstract":"Field emission properties on several different metal surfaces irradiated with helium plasmas were measured. Field emission currents from nanostructure, pinhole, and loop-like tantalum surfaces were significantly higher than that from polished tantalum (Ta) surface. Before and after the micro-breakdown, where the current density was under ~1 μA/mm2, field enhancement factor showed slight increase. On the other hand, significant increase of field enhancement factor was measured after breakdown, where the current density increased up to ~100 μA/mm2. In the scanning electron microscope observation, melted cathode spots were detected. The increment of field enhancement factor after the breakdown may be induced by thermo-field electron emission from the melted spots.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"115 26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126384938","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7748673
Shimin Li, Xinjian Huang, Yingsan Geng, Zhiyuan Liu, Jianhua Wang
The objective of this paper is to propose a mechanism transition between two consecutive breakdowns at short rod-plane vacuum gap. A rod-plane vacuum gap is designed in a vacuum interrupter. A 50Hz power frequency voltage is applied across the vacuum interrupter to measure the pre-breakdown field emission current. A compensation algorithm removes the displacement current from the measured current and then only field emission current left. The voltage and field emission current fit the Fowler-Nordheim theory and two parameters β value and effective emission area can be obtained. Three vacuum interrupters are applied the power frequency voltage twice and two consecutive breakdowns happen. The experimental results show that: The first breakdown (BD) voltages of the three vacuum interrupters are 49.5 kV, 44.7 kV, 41.1kV (peak value), and the β value are 260,219, 257 respectively. The second breakdown (BD) voltages of the three vacuum interrupters are 51.5 kV, 48.3 kV, 44.1kV (peak value) but pre-breakdown currents β values and effective emission area are too low to be determined. Thus a mechanism transition between the two consecutive breakdowns in a short rod-plane vacuum gap are suggested as follows: field emission current induced breakdown and particle induced breakdown both exist at 1mm vacuum gap. The first breakdown is induced by field emission current and the second breakdown is induced by particles.
{"title":"A mechanism transition between two consecutive breakdowns at short rod-plane vacuum gap","authors":"Shimin Li, Xinjian Huang, Yingsan Geng, Zhiyuan Liu, Jianhua Wang","doi":"10.1109/DEIV.2016.7748673","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748673","url":null,"abstract":"The objective of this paper is to propose a mechanism transition between two consecutive breakdowns at short rod-plane vacuum gap. A rod-plane vacuum gap is designed in a vacuum interrupter. A 50Hz power frequency voltage is applied across the vacuum interrupter to measure the pre-breakdown field emission current. A compensation algorithm removes the displacement current from the measured current and then only field emission current left. The voltage and field emission current fit the Fowler-Nordheim theory and two parameters β value and effective emission area can be obtained. Three vacuum interrupters are applied the power frequency voltage twice and two consecutive breakdowns happen. The experimental results show that: The first breakdown (BD) voltages of the three vacuum interrupters are 49.5 kV, 44.7 kV, 41.1kV (peak value), and the β value are 260,219, 257 respectively. The second breakdown (BD) voltages of the three vacuum interrupters are 51.5 kV, 48.3 kV, 44.1kV (peak value) but pre-breakdown currents β values and effective emission area are too low to be determined. Thus a mechanism transition between the two consecutive breakdowns in a short rod-plane vacuum gap are suggested as follows: field emission current induced breakdown and particle induced breakdown both exist at 1mm vacuum gap. The first breakdown is induced by field emission current and the second breakdown is induced by particles.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124293469","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7748737
A. Chaly, I. N. Poluyanova, V. Yakovlev, K. K. Zabello, A. A. Logatchev, S. M. Shkolanik
The main reason of breakdown after kA arc extinction is considered to be the overheating of anode surface during arc burning. The aim of this work is to experimentally determine the anode surface temperature distribution just after current zero for the range of arc currents from successfully interrupted levels up to the levels of guaranteed failure. The measurements were done by a high-speed video camera Phantom M310 equipped by a Carl Zeiss 100/2 macro lens. The anode surface temperature distribution was obtained by comparison of the results of anode surface filming and the results of calibrated band-lamp filming in identical conditions. The measurements were done for SSS CuCr 70/30 AMF electrodes for the currents up to the interruption limit.
{"title":"Experimental study of anode surface temperature after current zero for a range of current levels","authors":"A. Chaly, I. N. Poluyanova, V. Yakovlev, K. K. Zabello, A. A. Logatchev, S. M. Shkolanik","doi":"10.1109/DEIV.2016.7748737","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748737","url":null,"abstract":"The main reason of breakdown after kA arc extinction is considered to be the overheating of anode surface during arc burning. The aim of this work is to experimentally determine the anode surface temperature distribution just after current zero for the range of arc currents from successfully interrupted levels up to the levels of guaranteed failure. The measurements were done by a high-speed video camera Phantom M310 equipped by a Carl Zeiss 100/2 macro lens. The anode surface temperature distribution was obtained by comparison of the results of anode surface filming and the results of calibrated band-lamp filming in identical conditions. The measurements were done for SSS CuCr 70/30 AMF electrodes for the currents up to the interruption limit.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122490104","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7748664
Shimin Li, Yingsan Geng, Zhiyuan Liu, Jianhua Wang
The objective of this paper is to determine the influence of the depth of cathode melted layer on vacuum gap's insulation. A pair of rod-plane electrode was used. A DC arcing circuit produced different depth melted layer on the rod anode through different arcing time, which were 10ms, 46ms and 73ms respectively. Then the vacuum gap was adjusted at 1mm to measure the breakdown voltage. Positive polarity standard 1.2/50μs lighting impulse voltage was applied by a basic up-down method and the rod was the cathode. Experimental results revealed that the breakdown probability distribution followed a Weibull distribution when the breakdown voltage saturated. The 50% breakdown voltage U50 of different arcing time 0ms, 10ms, 46ms, 73ms corresponded to 55.6kV, 73.3kV, 75.5kV, 77.9kV, respectively. The U50 with the melted layers increased 37% at least. However, the U50 with various depth of melted layers were similar. Therefore, the melted layer does improve the breakdown voltage but the depth of melted layer has no influence on the breakdown voltage.
{"title":"The influence of the cathode melted layer on vacuum insulation","authors":"Shimin Li, Yingsan Geng, Zhiyuan Liu, Jianhua Wang","doi":"10.1109/DEIV.2016.7748664","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7748664","url":null,"abstract":"The objective of this paper is to determine the influence of the depth of cathode melted layer on vacuum gap's insulation. A pair of rod-plane electrode was used. A DC arcing circuit produced different depth melted layer on the rod anode through different arcing time, which were 10ms, 46ms and 73ms respectively. Then the vacuum gap was adjusted at 1mm to measure the breakdown voltage. Positive polarity standard 1.2/50μs lighting impulse voltage was applied by a basic up-down method and the rod was the cathode. Experimental results revealed that the breakdown probability distribution followed a Weibull distribution when the breakdown voltage saturated. The 50% breakdown voltage U50 of different arcing time 0ms, 10ms, 46ms, 73ms corresponded to 55.6kV, 73.3kV, 75.5kV, 77.9kV, respectively. The U50 with the melted layers increased 37% at least. However, the U50 with various depth of melted layers were similar. Therefore, the melted layer does improve the breakdown voltage but the depth of melted layer has no influence on the breakdown voltage.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122835769","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 : 2016-09-01DOI: 10.1109/DEIV.2016.7763989
Guoyue Zhang, Mingli Wen, Min Li, Xiaoqin Wang, Rong Yu
The effect of ceramic metallization process on the performance of vacuum interrupter was researched by X-ray thickness test, metallographic analysis, tensile strength test and air tightness test. Electroplating Ni and coating Ni metallization processes were used in this research. The thickness of electroplating Ni is 3.5μm-6μm, and that of coating Ni is 4μm-6μm. The Ni layers of electroplating Ni and coating Ni are both continuous, but electroplating Ni is not uniform. A little Ni layer can be seen from electroplating Ni ceramic after vacuum brazing. The tensile strength difference of standard tensile pieces between them is little. The air tightness difference of vacuum interrupter between them is not obvious.
{"title":"The effect of ceramic metallization process on the performance of vacuum interrupter","authors":"Guoyue Zhang, Mingli Wen, Min Li, Xiaoqin Wang, Rong Yu","doi":"10.1109/DEIV.2016.7763989","DOIUrl":"https://doi.org/10.1109/DEIV.2016.7763989","url":null,"abstract":"The effect of ceramic metallization process on the performance of vacuum interrupter was researched by X-ray thickness test, metallographic analysis, tensile strength test and air tightness test. Electroplating Ni and coating Ni metallization processes were used in this research. The thickness of electroplating Ni is 3.5μm-6μm, and that of coating Ni is 4μm-6μm. The Ni layers of electroplating Ni and coating Ni are both continuous, but electroplating Ni is not uniform. A little Ni layer can be seen from electroplating Ni ceramic after vacuum brazing. The tensile strength difference of standard tensile pieces between them is little. The air tightness difference of vacuum interrupter between them is not obvious.","PeriodicalId":296641,"journal":{"name":"2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124744538","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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