Pub Date : 1995-09-17DOI: 10.1109/ISEIM.1995.496598
K. Murata, Y. Tanaka, T. Takada
To avoid the effect of space charge accumulation, we must find the condition of low frequency AC voltage application which is low enough to apply the withstand voltage test, and high enough to neglect the effect of space charge accumulation in XLPE. In this report, space charge is measured using the pulsed electro-acoustic (PEA) method with low frequency AC voltage application.
{"title":"Space charge formation in XLPE with low frequency AC voltage","authors":"K. Murata, Y. Tanaka, T. Takada","doi":"10.1109/ISEIM.1995.496598","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496598","url":null,"abstract":"To avoid the effect of space charge accumulation, we must find the condition of low frequency AC voltage application which is low enough to apply the withstand voltage test, and high enough to neglect the effect of space charge accumulation in XLPE. In this report, space charge is measured using the pulsed electro-acoustic (PEA) method with low frequency AC voltage application.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125438479","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496617
Gong Guoli, Zhang Peihong, Dong Guangyu, Dong Zhenhua
The influence of SF6 and SF6/N2 dissociating products on the electrical performance of epoxy ester varnish, polyesterimide varnish, polyester varnish and phenolic resin varnish commonly used in electrical equipment has been discussed. From the test results it is shown that the surface resistances and breakdown voltages of the samples all decrease after corona discharge, and they are lower in SF6/N2 than SF6.
{"title":"The influence of SF6 and SF6/N2 dissociating products on the electrical performance of several insulating varnishes","authors":"Gong Guoli, Zhang Peihong, Dong Guangyu, Dong Zhenhua","doi":"10.1109/ISEIM.1995.496617","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496617","url":null,"abstract":"The influence of SF6 and SF6/N2 dissociating products on the electrical performance of epoxy ester varnish, polyesterimide varnish, polyester varnish and phenolic resin varnish commonly used in electrical equipment has been discussed. From the test results it is shown that the surface resistances and breakdown voltages of the samples all decrease after corona discharge, and they are lower in SF6/N2 than SF6.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122095553","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496615
R. Matsuoka, H. Shinokubo, K. Kondo, T. Fujimura, T. Terada
Excellent withstand voltage characteristics of silicone rubber insulators under contaminated conditions are fundamentally attributed to the migration of low molecular silicone from the bulk of silicone rubber even to the contaminants on the insulator surface. In this paper the effect of time lapse on hydrophobicity after contamination of specimen insulators was investigated in terms of receding contact angle and contamination withstand voltage.
{"title":"Artificial contamination withstand voltage characteristics of polymer insulators","authors":"R. Matsuoka, H. Shinokubo, K. Kondo, T. Fujimura, T. Terada","doi":"10.1109/ISEIM.1995.496615","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496615","url":null,"abstract":"Excellent withstand voltage characteristics of silicone rubber insulators under contaminated conditions are fundamentally attributed to the migration of low molecular silicone from the bulk of silicone rubber even to the contaminants on the insulator surface. In this paper the effect of time lapse on hydrophobicity after contamination of specimen insulators was investigated in terms of receding contact angle and contamination withstand voltage.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122589041","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496526
Geng Fenghui, G. Liang-yu, Guo Wenyuan
The organic PTCR (Positive Temperature Coefficient Resistance) material that consists of the polymer, the conductive particle and additives has been studied in this paper. The crystallinity of the polymer and the dispersivity of the conductive particle can obviously affect conducting property of the material. This property belongs to conductive characteristic of the composite dielectric, and is a kind of crystal-boundary-controlled conduction. The paper has investigated conducting property of the material, in order to gain more applications in energy saving and fire resistance.
{"title":"Study on conducting property of the organic PTCR material","authors":"Geng Fenghui, G. Liang-yu, Guo Wenyuan","doi":"10.1109/ISEIM.1995.496526","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496526","url":null,"abstract":"The organic PTCR (Positive Temperature Coefficient Resistance) material that consists of the polymer, the conductive particle and additives has been studied in this paper. The crystallinity of the polymer and the dispersivity of the conductive particle can obviously affect conducting property of the material. This property belongs to conductive characteristic of the composite dielectric, and is a kind of crystal-boundary-controlled conduction. The paper has investigated conducting property of the material, in order to gain more applications in energy saving and fire resistance.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114413231","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496550
W. xinsheng, N. Yoshimura, K. Murata, Y. Tanaka, T. Muronaka, T. Takada
Using plate and coaxial cable samples, the space charge distributions in various polyolefin materials such as PP, HDPE, LDPE and XLPE under DC voltage are investigated by the pulsed electro-acoustic method, and the mechanism of formation of space charge in polyolefin materials under electrical stress is discussed. From the test results, it is shown that the difference in characteristics of space charge distribution in various dielectrics is attributed to the physical and chemical inherence of the materials.
{"title":"The influence of morphology and structure on space charge distribution in polyolefin materials","authors":"W. xinsheng, N. Yoshimura, K. Murata, Y. Tanaka, T. Muronaka, T. Takada","doi":"10.1109/ISEIM.1995.496550","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496550","url":null,"abstract":"Using plate and coaxial cable samples, the space charge distributions in various polyolefin materials such as PP, HDPE, LDPE and XLPE under DC voltage are investigated by the pulsed electro-acoustic method, and the mechanism of formation of space charge in polyolefin materials under electrical stress is discussed. From the test results, it is shown that the difference in characteristics of space charge distribution in various dielectrics is attributed to the physical and chemical inherence of the materials.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"25 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124471439","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496600
T. Tanaka, H. Shirai, O. Kisanuki, M. Uchiumi
The LIPP method was used for measuring the charge distribution at the interface between PE/EVA laminate dielectrics under dc stress. High power laser light of 300 mJ/pulse was applied to a specially coated surface of the specimen. A short (300 ps) and a long (5 ns) laser pulse were used for thin and thick specimens, respectively. The result of the measurement shows that space charge was accumulated at the interface, When it was positive, the space charge stayed at the interface on the EVA side and was not transferred to the interface on the LDPE side. On the contrary, when it was negative, the space charge was transferred to the interface on the LDPE side.
{"title":"Laser-induced pressure pulse measurements of space charge in PE/EVA laminates","authors":"T. Tanaka, H. Shirai, O. Kisanuki, M. Uchiumi","doi":"10.1109/ISEIM.1995.496600","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496600","url":null,"abstract":"The LIPP method was used for measuring the charge distribution at the interface between PE/EVA laminate dielectrics under dc stress. High power laser light of 300 mJ/pulse was applied to a specially coated surface of the specimen. A short (300 ps) and a long (5 ns) laser pulse were used for thin and thick specimens, respectively. The result of the measurement shows that space charge was accumulated at the interface, When it was positive, the space charge stayed at the interface on the EVA side and was not transferred to the interface on the LDPE side. On the contrary, when it was negative, the space charge was transferred to the interface on the LDPE side.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124252578","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496596
H. Shimada, H. Kiriishi, T. Tashita, Tatsuo Takada, T. Maeno
We have designed an electric field distribution measurement system using electric field modulation and a video camera, and have used the system to measure DC electric field distribution in nitrobenzene. We obtain a lower measurement level of E/sub dc/=200 V/cm. The resolution of the measurement system is about 12 bits, and for higher sensitivity measurement we need to use a higher resolution D/A converter.
{"title":"Measurement of two-dimensional electric field distribution in liquid dielectric using Kerr effect","authors":"H. Shimada, H. Kiriishi, T. Tashita, Tatsuo Takada, T. Maeno","doi":"10.1109/ISEIM.1995.496596","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496596","url":null,"abstract":"We have designed an electric field distribution measurement system using electric field modulation and a video camera, and have used the system to measure DC electric field distribution in nitrobenzene. We obtain a lower measurement level of E/sub dc/=200 V/cm. The resolution of the measurement system is about 12 bits, and for higher sensitivity measurement we need to use a higher resolution D/A converter.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132453700","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496547
Hui Ma, Jixun Ma, Guangning Wu, Z. Huang, Xinyan Wu, Henkun Xie, D. Sun, Rumin Zhang
On-line monitoring of partial discharges (PD) in turbine generator is a important test for assessing the condition of generator insulation system. In this study, a broadband current transducer system for on-line monitoring of PD in turbine generator has been studied. Combined with a pulse height analyzer and a frequency spectrum analyzer, the transducer system has been used to detect three types of simulated origins of PD which often exist in turbine generator stator winding (discharges in cavity, discharges at endwindings and discharges due to broken strand). The above three types of PD origins can be recognized by using the acquired time domain spectrum and frequency domain spectrum. Some on-line monitoring results of PD in turbine generator with the transducer system are presented.
{"title":"The study of broadband current transducer system for on-line monitoring of partial discharges in turbine generator","authors":"Hui Ma, Jixun Ma, Guangning Wu, Z. Huang, Xinyan Wu, Henkun Xie, D. Sun, Rumin Zhang","doi":"10.1109/ISEIM.1995.496547","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496547","url":null,"abstract":"On-line monitoring of partial discharges (PD) in turbine generator is a important test for assessing the condition of generator insulation system. In this study, a broadband current transducer system for on-line monitoring of PD in turbine generator has been studied. Combined with a pulse height analyzer and a frequency spectrum analyzer, the transducer system has been used to detect three types of simulated origins of PD which often exist in turbine generator stator winding (discharges in cavity, discharges at endwindings and discharges due to broken strand). The above three types of PD origins can be recognized by using the acquired time domain spectrum and frequency domain spectrum. Some on-line monitoring results of PD in turbine generator with the transducer system are presented.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132221640","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496583
X. Yin, K. Yoshino, S. Nakagawa, M. Adachi, H. Yamamoto, T. Watanuki, I. Isa
A new technique has previously been proposed by the authors to prepare a composite of conducting and insulating polymers by mixing insulating polymers with conducting polymer coated insulating polymer species, whose shape and size can be controlled. The electrical conductivity of the mixtures made by this method range from the insulator to the metallic region depending on the concentration of conducting polymer coated insulating polymer species. In the present paper, the conduction and dielectric properties of the composite are studied at concentrations near the percolation threshold.
{"title":"Conduction and high field phenomena in insulating polymer-conducting polymer composite","authors":"X. Yin, K. Yoshino, S. Nakagawa, M. Adachi, H. Yamamoto, T. Watanuki, I. Isa","doi":"10.1109/ISEIM.1995.496583","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496583","url":null,"abstract":"A new technique has previously been proposed by the authors to prepare a composite of conducting and insulating polymers by mixing insulating polymers with conducting polymer coated insulating polymer species, whose shape and size can be controlled. The electrical conductivity of the mixtures made by this method range from the insulator to the metallic region depending on the concentration of conducting polymer coated insulating polymer species. In the present paper, the conduction and dielectric properties of the composite are studied at concentrations near the percolation threshold.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123026218","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 : 1995-09-17DOI: 10.1109/ISEIM.1995.496576
Y. Aoki, S. Honda, T. Wakamatsu, Z. Kato, F. Kaneko
The attenuated total reflection (ATR) properties were measured for C/sub 15/TCNQ Langmuir-Blodgett (LB) ultrathin films on Al thin films deposited using two types of processes. The dielectric constants were theoretically calculated from the ATR curves. It was estimated that Z-type LB films were well deposited in the first process. On the contrary, in the second process, it was estimated that the LB films were not perfectly deposited as Y-type, but partially as Z-type.
{"title":"Evaluation of TCNQ LB films on aluminum thin films by ATR measurement","authors":"Y. Aoki, S. Honda, T. Wakamatsu, Z. Kato, F. Kaneko","doi":"10.1109/ISEIM.1995.496576","DOIUrl":"https://doi.org/10.1109/ISEIM.1995.496576","url":null,"abstract":"The attenuated total reflection (ATR) properties were measured for C/sub 15/TCNQ Langmuir-Blodgett (LB) ultrathin films on Al thin films deposited using two types of processes. The dielectric constants were theoretically calculated from the ATR curves. It was estimated that Z-type LB films were well deposited in the first process. On the contrary, in the second process, it was estimated that the LB films were not perfectly deposited as Y-type, but partially as Z-type.","PeriodicalId":130178,"journal":{"name":"Proceedings of 1995 International Symposium on Electrical Insulating Materials","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123398656","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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