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1982 IEEE International Conference on Electrical Insulation最新文献

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Analysis of cables with visible halos 具有可见光晕的电缆分析
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-07 DOI: 10.1109/EIC.1982.7464493
J. Tanaka, R. Luther
{"title":"Analysis of cables with visible halos","authors":"J. Tanaka, R. Luther","doi":"10.1109/EIC.1982.7464493","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464493","url":null,"abstract":"Halos found in polyethylene cables removed for failure analyses are characterized. The halos are produced by some volatile materials. Water analysis shows a higher water content within the halo than in areas where the halo does not exist. Some organic volatiles introduced at the time of manufacture remain. Acetophenone is variable depending on the particular failure sample. Other organics, some dicumylperoxide decomposition products and some not, are also identified. None of these could be specifically correlated with the presence or absence of the halo. The character of the halos was found to change slowly with time after the cable was removed from the ground. The questions raised by these findings are discussed.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128861027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Properties of tree growth under high magnetic fields Massachusetts institute of technology high voltage research laboratory 高磁场下树木生长的特性，麻省理工学院高压研究实验室
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-07 DOI: 10.1109/EIC.1982.7464443
C. Cooke, Z. Liu, A. Rynkowski
{"title":"Properties of tree growth under high magnetic fields Massachusetts institute of technology high voltage research laboratory","authors":"C. Cooke, Z. Liu, A. Rynkowski","doi":"10.1109/EIC.1982.7464443","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464443","url":null,"abstract":"High magnetic fields have been used to perturb the growth of electrical trees in solid insulation. The results indicate the nature of the mechanism of tree growth by distinguishing high and low velocity discharge phenomena.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133122121","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
Calorimetric analysis of water dissolved in dielectric fluids 介电流体中溶解水的量热分析
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464455
S. Yasufuku, K. Goto
{"title":"Calorimetric analysis of water dissolved in dielectric fluids","authors":"S. Yasufuku, K. Goto","doi":"10.1109/EIC.1982.7464455","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464455","url":null,"abstract":"In order to investigate how the water dissolved in dielectric fluids at room temperature behaves in case of being subjected to cooling/heating, such dielectric fluids as alkyldiphenylethane and dimethyl silicone liquid of 50 cSt at 25°C in which various amounts of water were dissolved were investigated calorimetrically, using highly precise Differential Scanning Calorimetry (DSC). Moreover, the degree of turbidity of the specimens which were cooled or heated in a constant rate in a low temperature bath was observed visually to detect the appearance and disappearance of coagulation of the dissolved water in them. As a result, it has been found out that, whereas the water dissolved in alkyldiphenylethane appears to be led to an icy state, a coagulated state and a dissolved state at low temperatures, depending on its water contents, that in dimethyl silicone liquid appears to be led to a coagulated state and a dissolved state, without any indication of formation of the ice crystals. The authors have succeeded in determining quantitatively the ice crystals produced from the water dissolved in a dielectric fluid at low temperatures using Differential Scanning Calorimetry. Thus, it has been concluded that this method has proved very useful for investigating the crystallization behavior of dissolved water existing in dielectric fluids at low temperatures, although it goes without saying that this method is also available for their crystallization temperature and glass transition temperature measurements at low temperatures.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115639372","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
Electrical conductivity in insulating materials 绝缘材料的导电性
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464457
J. Aceves, I. D. Couper
{"title":"Electrical conductivity in insulating materials","authors":"J. Aceves, I. D. Couper","doi":"10.1109/EIC.1982.7464457","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464457","url":null,"abstract":"In order to analyze and interpret a.c. data obtained from dielectric measurements of insulator materials, attemps have been made to understand the a.c. behaviour of simple R.C. circuits, so than an appropriate simulation can be made. The plots and some data from insulator materials are presented including the well known temperature and frequency dependance of the resistive component. The analysis of simple R.C. circuits is intended to help the understanding of the complex behaviour of insulators.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116860290","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
Study on estimate approach of flashover voltage in oil gap under non-uniform field 非均匀场下油隙闪络电压估算方法研究
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464484
M. Yamada, T. Okamoto, A. Kurahashi
{"title":"Study on estimate approach of flashover voltage in oil gap under non-uniform field","authors":"M. Yamada, T. Okamoto, A. Kurahashi","doi":"10.1109/EIC.1982.7464484","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464484","url":null,"abstract":"An estimate method of flashover voltage in oil gap under non-uniform field is proposed. The method is deduced on the base of the n power law for V-d characteristic confirmed experimentally under uniform field. The method developed in this paper enables the V-d characteristics of oil gaps under various electric field distribution to be calculated. The comparison of calculation with experiments in corner-plane, rod-rod, rod-plane electrode and coil insulation models of transformer are summarized. The V-d characteristics obtained by this method agree approximately with experimental results.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122407436","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
A new electrical metrology of H.V. insulation of rotating machines 旋转机械高压绝缘的一种新的电气计量方法
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464459
R. Goffaux
{"title":"A new electrical metrology of H.V. insulation of rotating machines","authors":"R. Goffaux","doi":"10.1109/EIC.1982.7464459","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464459","url":null,"abstract":"This partial discharges metrology is based on the neutralization kinetics of initiated charges, gouverned by the electrical conductivity of the wall surrounding the ionized voids.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115855489","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
Comparative tests on thermal endurance of enamelled copper and aluminium wires, using the conventional ageing test procedure and the equalized ageing process method 用常规老化试验方法和均匀老化法对漆包铜线和铝线的热耐久性进行了对比试验
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464426
P. Paloniemi, Paul Lindström
{"title":"Comparative tests on thermal endurance of enamelled copper and aluminium wires, using the conventional ageing test procedure and the equalized ageing process method","authors":"P. Paloniemi, Paul Lindström","doi":"10.1109/EIC.1982.7464426","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464426","url":null,"abstract":"1) In spite of the complicated ageing behaviour of wire coatings the EAP method produces results of satisfactory reliability. 2) Effect of the base metal on the thermal endurance of the coating varies very much, depending on the coating type. Whereas the effect on poly(vinyl acetal) seems to be negligible, it is very significant on AI overcoated polyester, giving to Aluminium wires 15 … 20 K higher rating than to Copper wires. Effect on poly(ester imide) was found to be temperature-dependent, the difference diminishing towards lower temperature and probably being insignificant at the service temperature range. 3) Atmospheric humidity in the air surrounding the ageing ovens may have a very significant influence on ageing test results, especially on condensation polymers. Undoubtedly this may be one reason for the large scatter of twist test results sometimes obtained; in addition it may distort even the shape of the Arrhenius plot, e.g. due to seasonal variations in the absolute humidity. As a consequence, some kind of humidity control should always be used when ageing tests on materials susceptible to hydrolytic degradation are performed.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122132478","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
High field conduction in propylene carbonate 碳酸丙烯酯的高导电性
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464437
S. Theoleyre, R. Tobazéon
{"title":"High field conduction in propylene carbonate","authors":"S. Theoleyre, R. Tobazéon","doi":"10.1109/EIC.1982.7464437","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464437","url":null,"abstract":"The study of high field conduction of an highly polar liquid, propylene carbonate (εr = 65) is bath of fundamental and practical interest. It is proved that fields up to 450 kV/cm applied with metallic electrodes to the liquid, deionized by electrodialysis, produce negative ion injection. Ions are produced at the liquid-metal interface by an electrochemical process which is probally the reduction of the liquid. The current density versus the applied field is described by a unique curve in the range of studied conductivities. This is in agreement with a previous model according to which the injected current is controlled by electrochemical kinetics. Electrohydrodynamic turbulent motions of the liquid have but a small influence on the calculated currents. Fast transient measurements of the currents following a voltage step show that the kinetics of the injection in our experimental conditions is a fast process. This gives promise for applications needing strong carrier injection, such as liquid electrostatic generators.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"08 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128967643","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 morphology of pe insulation according to the quality of pe granulate pe保温层的形态根据pe颗粒的质量而定
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464492
S. Grzybowski, A. Rakowska, P. Zubielik
{"title":"The morphology of pe insulation according to the quality of pe granulate","authors":"S. Grzybowski, A. Rakowska, P. Zubielik","doi":"10.1109/EIC.1982.7464492","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464492","url":null,"abstract":"This paper presents a study of the effect of granulate quality on the morphology of various polyethylene compounds. Data was obtained using a scanning electron microscope and an infrared spectroscope.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131526278","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
Temperature distribution on polluted insulator string model 污染绝缘子串模型的温度分布
1982 IEEE International Conference on Electrical Insulation Pub Date : 1982-06-01 DOI: 10.1109/EIC.1982.7464460
A. Nosseir, E. El-Sharkawi, M. Awad, H. Zarzoura
{"title":"Temperature distribution on polluted insulator string model","authors":"A. Nosseir, E. El-Sharkawi, M. Awad, H. Zarzoura","doi":"10.1109/EIC.1982.7464460","DOIUrl":"https://doi.org/10.1109/EIC.1982.7464460","url":null,"abstract":"The surface temperature of energized, wetted by steam fog, polluted insulator string model was measured and scanned from the instant of voltage application using an infra-red camera. Visicorder oscillographs were used to trace and record the leakage currents. Results show that the presence of capacitance increases the maximum surface temperature, enhances the degree of non-uniform temperature distribution, helps the formation of dry bands and increases the level and intensity of discharges as well as the probability of the formation of large magnitude leakage current pulses.","PeriodicalId":422317,"journal":{"name":"1982 IEEE International Conference on Electrical Insulation","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121125478","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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