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Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987最新文献

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Plasma polymer coating for suppression of charge injection into polyethylene 抑制注入聚乙烯的电荷的等离子体聚合物涂层
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-12-01 DOI: 10.1109/CEIDP.1987.7736564
T. Nakano, T. Kihira, Y. Ohki
{"title":"Plasma polymer coating for suppression of charge injection into polyethylene","authors":"T. Nakano, T. Kihira, Y. Ohki","doi":"10.1109/CEIDP.1987.7736564","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736564","url":null,"abstract":"Electrical conduction in polymer is affected greatly by traps and the electrode/polymer interface. Plasma polymerization is a kind of low temperature process and considered to be a good method to make flawless thin films. The present paper reports the effect of plasma polymer coating on the electrical conduction in polyethylene.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115019647","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: 2
Simultaneous measurement of light emission, current pulses and growth of prebreakdown streamers in hexane 正己烷中光发射、电流脉冲和预击穿流光生长的同时测量
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-12-01 DOI: 10.1109/CEIDP.1987.7736547
E. Kelley, M. Nehmadi, R. Hebner, P. Mckenny, E. Forster
{"title":"Simultaneous measurement of light emission, current pulses and growth of prebreakdown streamers in hexane","authors":"E. Kelley, M. Nehmadi, R. Hebner, P. Mckenny, E. Forster","doi":"10.1109/CEIDP.1987.7736547","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736547","url":null,"abstract":"Extensive studies of events leading to electrical breakdown in liquids [1] and in solids [2] show that streamers are formed in the dielectric before breakdown. The streamers are believed to be low density regions in which charge carriers can move more freely than in the surrounding dense medium [1]. For a needle — sphere electrode system, when the streamer emanates from the cathode needle a pulsed current is produced. The light emitted by the cathode streamer is also in the form of pulses which temporally correlate with the current pulses. When the needle is the anode, the current is in the form of a pulse train superimposed upon a continuous background current. These are familiar results which have received recent attention [3].","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125648727","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: 12
Partial discharges in transformer oil 变压器油局部放电
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736542
M. N. Narayanachar, V. Prabhashanker
{"title":"Partial discharges in transformer oil","authors":"M. N. Narayanachar, V. Prabhashanker","doi":"10.1109/CEIDP.1987.7736542","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736542","url":null,"abstract":"Since a long time the existence of Partial discharges (PD) in transformer oil was doubted because breakdown and inception levels are very close. This confirms the presently accepted fact that [1] PD occur in oil. In the breakdown process the formation of a “bubble” or “cavity” is accepted generally as a part of the initiatory process. When the bubble reaches a “critical size” a discharge occurs [2]. When such a discharge occurs it can be shown that the bubble can grow in size leading to second discharge which grows to a breakdown. If it bursts into smaller sizes the discharge stops [3,4]. The probability of this is very low.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"10 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124947695","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
Nature of partial discharges and their measurement 局部放电的性质及其测量
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736350
R. Bartnikas
{"title":"Nature of partial discharges and their measurement","authors":"R. Bartnikas","doi":"10.1109/CEIDP.1987.7736350","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736350","url":null,"abstract":"There are perhaps very few measurement techniques that have contributed as much as partial discharge detection in the evaluation of high voltage apparatus, devices and cables. Notwithstanding, the progress that has been achieved over the past several decades in the description and understanding of the various mechanisms that may precipitate electrical insulation system failure, corona or partial discharge measurements have retained their preponderant importance. This must to a large extent be attributed to the fact that cavity-type defects, introduced into the insulation system during the various manufacturing steps, can be readily detected by means of routine corona discharge tests — with the tacit proviso that such cavities undergo ionization and subsequent pulse-type discharge in order to activate the response of conventional corona pulse detectors.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125794814","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: 5
Electric field and charge profiles of electron beam irradiated PMMA until breakdown using Kerr electro-optic measurements 用克尔电光测量辐照PMMA直至击穿的电子束的电场和电荷分布
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736573
M. Hikita, C. Cooke, M. Zahn, K. Wright, J. Brennan
{"title":"Electric field and charge profiles of electron beam irradiated PMMA until breakdown using Kerr electro-optic measurements","authors":"M. Hikita, C. Cooke, M. Zahn, K. Wright, J. Brennan","doi":"10.1109/CEIDP.1987.7736573","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736573","url":null,"abstract":"We have been developing Kerr electro-optic field mapping measurement techniques in electron beam irradiated polymethylmethacrylate (PMMA). In the previous reports, we have shown numerous light maxima and minima resulting from the accumulated trapped charge recorded on videotape and analyzed using a computerized image digitization system to obtain the charge and field profiles [1,2]. In this report, a further investigation of electric field and charge profiles using the Kerr effect is reported for energetic electron beam penetration into short circuited PMMA slabs in vacuum to simulate the space environment for a specific time or until breakdown takes place. Breakdown mechanisms and charge dynamics during the electron beam irradiation in PMMA are discussed. Radiation induced conductivity (RIC) of PMMA obtained from the short circuited current measurements during charging is also discussed.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125426690","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: 3
Carrier injecton and conduction under high fields in dielectrics 介电介质中高场下的载流子注入与传导
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736555
P. Pfluger, T. Baumann, E. Carrier, H. Dersch, F. Stucki, H. Zeller
{"title":"Carrier injecton and conduction under high fields in dielectrics","authors":"P. Pfluger, T. Baumann, E. Carrier, H. Dersch, F. Stucki, H. Zeller","doi":"10.1109/CEIDP.1987.7736555","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736555","url":null,"abstract":"Long-term degradation and dielectric breakdown of large bandgap insulators is caused by a complex set of mutually influenced microscopic physical and chemical mechanisms. Electronic, thermal, chemical, mechanical and other effects cannot be separated a priori and the lifetime-limiting processes have to be established in each case under specified conditions, for a given material system. In this short overview, we summarize progress made in the past few years at Brown Boveri Research in two important subfields relevant to dielectric aging, namely charge injection and charge transport under high electrical field conditions. We do not wish to imply that the effects described in the following are always or predominantly the ones which limit the practical use of insulating systems. Nevertheless, they must be kept in mind as ever-present electronic effects occuring even in the most perfect insulators.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132127938","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
DC partial discharge correlated with defect photographs 直流局部放电与缺陷照片相关
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736537
R. Bever
{"title":"DC partial discharge correlated with defect photographs","authors":"R. Bever","doi":"10.1109/CEIDP.1987.7736537","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736537","url":null,"abstract":"Partial discharge (PD) data taken by the dc ramp method were correlated with Scanning Electron Microscope (SEM) photos of internal flaws in several groups of high voltage capacitors. These were BaTiO3 capacitors for space use intended for dc service conditions; some were multilayer and some were single layer discs. Most passed the usual screening tests such as IR measurements and DWV, but several capacitors in each set had, compared to others in the same set, unusually high integrated corona charge transfer on ramping up to and also down from rated voltage. Heating at 85°C with leads shorted had to be done before each dc PD measurement to obtain reasonably repeatable data. Subsequent sectioning and SEM photographs revealed that if corona was above a certain level, the capacitors had cracks and delaminations as well as porosity, whereas below this they only had porosity. Data was also obtained on ac corona inception voltage to allow comparison with the above dc ramp test data. Ac and dc test methods are discussed in terms of arriving at approximate acceptance/rejection criteria.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134221419","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: 1
Impulse breakdown in SF6 for divergent fields, generation of primary electrons and formative time lags SF6中脉冲击穿的发散场，初级电子的产生和形成时间滞后
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736600
W. Pfeiffer, J. Wolf, P. Zipfl
{"title":"Impulse breakdown in SF6 for divergent fields, generation of primary electrons and formative time lags","authors":"W. Pfeiffer, J. Wolf, P. Zipfl","doi":"10.1109/CEIDP.1987.7736600","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736600","url":null,"abstract":"This contribution deals with formative time lags in SF6 and SF6-N2 mixtures in the submicrosecond range. The investigations were performed for different electrode arrangements and gap distances. Furthermore investigations with UV radiation and with a radioactive source were performed in order to evaluate the influence of the kind of preionization upon the generation of primary electrons.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115192914","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: 2
On the efficiency of low energy particles in a plasma polymer contact 低能粒子在等离子体聚合物接触中的效率
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736565
J. Lopez, B. Despax, C. Mayoux
{"title":"On the efficiency of low energy particles in a plasma polymer contact","authors":"J. Lopez, B. Despax, C. Mayoux","doi":"10.1109/CEIDP.1987.7736565","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736565","url":null,"abstract":"Two studies carried out simultaneously in our laboratory concern the fundamental aspect of plasma interaction with surfaces and the electrical behaviour of polymers after a treatment by discharges.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124278662","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: 2
Polarization-depolarization phenomena in apples 苹果的极化-去极化现象
Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987 Pub Date : 1987-10-01 DOI: 10.1109/CEIDP.1987.7736583
F. X. Hart, W. Coleman
{"title":"Polarization-depolarization phenomena in apples","authors":"F. X. Hart, W. Coleman","doi":"10.1109/CEIDP.1987.7736583","DOIUrl":"https://doi.org/10.1109/CEIDP.1987.7736583","url":null,"abstract":"Measurement of the dielectric properties of biological materials is important for several reasons. Calculation of the electric fields and currents produced in biological objects exposed to external sources requires knowledge of the dielectric constant and conductivity of the object at the frequencies of exposure. Variations in the dielectric properties can also be correlated with physiological changes. Finally, an understanding of the conduction and polarization mechanisms may eventually lead to an explanation of the observed biological effects of weak fields. This paper investigates the suitability of time domain methods for the determination of the dielectric spectrum (variation of capacitance, conductance and dielectric loss with frequency) of an apple. A fruit was chosen as the object of study because the physical conditions are more more readily controlled for plant than for animal tissues.","PeriodicalId":433367,"journal":{"name":"Conference on Electrical Insulation & Dielectric Phenomena — Annual Report 1987","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1987-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123545003","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
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