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1983 EIC 6th Electrical/Electronical Insulation Conference最新文献

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A new 275 class non-silicone micaceous insulation system 一种新的275级非硅云母绝缘系统
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465027
M. Dalai, V. K. Ganpate
{"title":"A new 275 class non-silicone micaceous insulation system","authors":"M. Dalai, V. K. Ganpate","doi":"10.1109/EEIC.1983.7465027","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465027","url":null,"abstract":"The temperature index of micaceous insulation is influenced by that of the bonding resin used therein, the thermal degradation processes being synonimous. Systems using epoxy novolac and cycloaliphatic offer rigid insulation and pose discharge problems.; Their temperature index has been improved by adopting better backing materials. However, epoxies become brittle during ageing at 210/230°C because of shrinkage in the resin matrix as a result of chain scission and crosslinking in oxidative degradation process, which involves evaporation of low molecular weight materials. Systems based on silicones are flexible but are prone to moisture influence in tropical conditions. The polybenzimidazole resin being true thermoplastic, because of the linear chain, eliminates the above deficiencies. Its usage has resulted in the development of new micaceous insulation. They are made rigid to flexible by varying catalyst proportion. They offer improved fatigue performance and higher peel strength at elevated temperatures due to hydrogen bonding. Resistance to'moisture and improved dissipation factor-temperature characteristics are the prime features. The isothermal and dynamic weight loss studies indicate higher activation energy of 134kJ/mole even at different stages of degradation and confirm excellent thermal stability. The system has been ascribed 275 class. Its usage would improve the specific capacity of machines.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121841983","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
Experience with the CEA generator insulation partial discharge test 有CEA发电机绝缘局部放电试验经验
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465034
M. Kurtz, J. Lyles, G. Stone
{"title":"Experience with the CEA generator insulation partial discharge test","authors":"M. Kurtz, J. Lyles, G. Stone","doi":"10.1109/EEIC.1983.7465034","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465034","url":null,"abstract":"This paper briefly describes a partial discharge test for hydraulic generator stator windings which can be done by station staff, without interrupting the operation of the generator. Examples of test results culled from thousands of tests over the past seven years are presented. Aside from pin-pointing machines requiring attention, evidence suggests that this test may be able to identify specific modes of degradation. Partial discharge testing is one of the main reasons Ontario Hydro has a very low winding replacement/major repair rate.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121598318","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
Corona suppression by a semiconductor coating in high voltage insulation systems 高压绝缘系统中半导体涂层的电晕抑制
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465043
H. Xie, Show-Tien Chen, S. Wu
{"title":"Corona suppression by a semiconductor coating in high voltage insulation systems","authors":"H. Xie, Show-Tien Chen, S. Wu","doi":"10.1109/EEIC.1983.7465043","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465043","url":null,"abstract":"Corona is initiated in high-stress regions and thus it can be suppressed by applying a semiconductor coating on the surface to relieve localized high stresses in those regions. Our investigation shows that silicon carbide has an excellent non-linear current field (I-E) characteristic and it is therefore a very good semiconductor-coating material for effective corona suppression. Theoretical analysis and experimental results indicate that for semiconductor materials with constant resistivity the optimal value of the surface resistivity ρs is around 109Ω per square for effective corona suppression, while for semiconductor materials with a non-linear I-E characteristic such as SiC, the optimal criterion is that ρo must be higher and the slope dρs/dE smaller at near zero field. Discussion on the choice of ρs-E characteristic for corona suppression for various power apparatus is given.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"86 18","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132846254","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
Applications of thermal analysis to studies of field aged distributton cables 热分析在现场老化配电电缆研究中的应用
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465019
Julian F. Johnson, R. Blaine
{"title":"Applications of thermal analysis to studies of field aged distributton cables","authors":"Julian F. Johnson, R. Blaine","doi":"10.1109/EEIC.1983.7465019","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465019","url":null,"abstract":"Studies of changes with aging of distribution cables involve determining the effects of electrical, thermal and environmental stresses on the entire cable system. Changes in the dielectric insulation material are subtle. The materials employed are polyethylene and EP rubber. Differential thermal analysis and differential scanning calorimetry have been employed extensively in studies of changes of the morphology of such cables. The degree of crystallinity has been shown to change with aging under stress. Although the reasons are not completely understood such changes are significant in that they markedly affect the solubility, particularly of water, which in turn is associated with the phenomena of water treeing. Other uses for DSC and DTA include estimation of the amount of remaining antioxidant. Additional analysis of the cable system, particularly the inner and outer conduction shields, is facilitated by use of DTA and DSC. Thermogravimetric analysis is regularly used to determine the amount of filler in filled cables as well as to give an estimate of the thermal stability of the polymeric dielectric. These permit comparison of various materials and the estimation of the effect of additives. Thermal analysis can also give insight into the amount of residual stress in the cable resulting from previous mechanical mishandling of the cable.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115475815","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
Heat shrinkable products for electronics: An overview of technology for the 1980's 电子产品用热收缩产品:八十年代技术概述
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465083
R. Haley, R. Wold, F. Michels
{"title":"Heat shrinkable products for electronics: An overview of technology for the 1980's","authors":"R. Haley, R. Wold, F. Michels","doi":"10.1109/EEIC.1983.7465083","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465083","url":null,"abstract":"This paper presents the principal technical development trends and changes in markets, the state of the art and the nature of new developments for the 1980's for heat shrinkable products.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114757388","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
VPI for class H traction-motors H级牵引电动机的VPI
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465110
B. Haberthur
{"title":"VPI for class H traction-motors","authors":"B. Haberthur","doi":"10.1109/EEIC.1983.7465110","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465110","url":null,"abstract":"Towards 1840, R. Davidson built a small car driven by an electromotor (Figure 1). Only three years later a six tons vehicle built by him reached a velocity of four miles per hour. The batteries allowed to cover a distance of 1½ miles.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122131876","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
Effect of insulating screen on flashover in air-gap 绝缘屏蔽对气隙闪络的影响
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465100
M. Abdullah, M. Abdellah, J. Derald Morgan
{"title":"Effect of insulating screen on flashover in air-gap","authors":"M. Abdullah, M. Abdellah, J. Derald Morgan","doi":"10.1109/EEIC.1983.7465100","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465100","url":null,"abstract":"The flashover in a non-uniform field air gap is influenced by the presence of an insulating screen in the gap. In the presence of a solid insulating barrier, the flashover voltage of a point-plate gap is substantially raised. The paper examines the influence of the position of a barrier on the flashover voltage of point-plate gap. Measurement was made using positive and negative d.c. and 60 Hz alternating voltage. Effect of the size of the barrier was also studied.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128560497","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
New developments in the insulating of electrical conductors by tape wrapping 电导体胶带绝缘的新进展
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465049
R.G. Wojtecki
{"title":"New developments in the insulating of electrical conductors by tape wrapping","authors":"R.G. Wojtecki","doi":"10.1109/EEIC.1983.7465049","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465049","url":null,"abstract":"Wire taping as means of applying insulation to conductors has been around for many years; however, a great deal of this process is still art. The objectives of this paper are to survey the wire wrapping process in detail and attempt to reduce some wire taping art to a science. A mathematical model of the process will be presented which can be utilized to determine head speeds, taping angles, and optimum tape widths as well as material yields. Tapes and laminates, their application, and consideration of material properties to the taping process are discussed.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130780061","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
Practical application of MEDIS wires to electrical machines MEDIS导线在电机上的实际应用
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465090
E. Jidai, H. Nakajima, M. Suzuki, S. Nakao
{"title":"Practical application of MEDIS wires to electrical machines","authors":"E. Jidai, H. Nakajima, M. Suzuki, S. Nakao","doi":"10.1109/EEIC.1983.7465090","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465090","url":null,"abstract":"Two kinds of dual coated magnet wires based on electrodeposition process (MEDIS wires) have received practical application to electrical machines in these two years. They consist of electrodeposited epoxy-acrylic layer as a common undercoat and conventional enamels as a topcoat. Polyamideimide and polyvinylformar enamels are used as topcoat of the wires. Polyamideimide overcoated MEDIS wire exhibits excellent heat resistance and insulation properties, especially freon resistance, and has been applied to general purpose motors and hermetic motors of refrigerators. Polyvinylformar overcoated MEDIS wire shows better oil resistance than conventional polyvinylformar wires and has been used in oil filled transformers.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131334649","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
The evaluation of recently developed VPI mica paper tapes for high-voltage rotating machines 高压旋转机械用VPI云母纸带的评价
1983 EIC 6th Electrical/Electronical Insulation Conference Pub Date : 1983-10-01 DOI: 10.1109/EEIC.1983.7465113
X. Bertsch, A. Jacques
{"title":"The evaluation of recently developed VPI mica paper tapes for high-voltage rotating machines","authors":"X. Bertsch, A. Jacques","doi":"10.1109/EEIC.1983.7465113","DOIUrl":"https://doi.org/10.1109/EEIC.1983.7465113","url":null,"abstract":"Recently developed mica paper tapes designed for the VPI-process for high voltage rotating machines offer the great advantage over conventional tapes, that the impregnation with epoxy resins of higher viscosity is possible. Therefore substantial cost savings are attained as the increase of viscosity of the impregnant is less critical than has been the case up to now. This is especially important for smaller manufacturers and repair shops with limited turn-over of impregnating resins.","PeriodicalId":148370,"journal":{"name":"1983 EIC 6th Electrical/Electronical Insulation Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1983-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116538687","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
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