Pub Date : 2008-10-01DOI: 10.1109/CEIDP.2008.4772928
E. Gockenbach, H. Borsi
The combination of a solid and a liquid insulation is the most frequently used insulating system in high voltage transformers, where components have to be insulated and loss heat has to be dissipated. The requirements on the liquid part of the insulating system are not only the electric and dielectric performance but also the performance regarding environmental requirements and dehydration capability as well as low inflammability. The contribution presents a comparison of the performance of natural and synthetic ester as an alternative to mineral oil.
{"title":"Natural and Synthetic Ester Liquids as alternative to mineral oil for power transformers","authors":"E. Gockenbach, H. Borsi","doi":"10.1109/CEIDP.2008.4772928","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772928","url":null,"abstract":"The combination of a solid and a liquid insulation is the most frequently used insulating system in high voltage transformers, where components have to be insulated and loss heat has to be dissipated. The requirements on the liquid part of the insulating system are not only the electric and dielectric performance but also the performance regarding environmental requirements and dehydration capability as well as low inflammability. The contribution presents a comparison of the performance of natural and synthetic ester as an alternative to mineral oil.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85768689","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772867
A. Aoufi, K. Zarbout, G. Damamme, G. Moya
This analysis is connected with the evolution of trapped charges, during electron injection, using a defocused electron beam of a Scanning Electron Microscope especially equipped with a secondary electron low-noise detector. Hence, during pulses of about ten ms, giving injection doses of a few pC, the measurements of the influence induced currents, Iind(t), due to the image charges Qind (t) in the metallic holder (corresponding to the trapped charges Qp (t) in the sample) and the total secondary electron currents, Isigma(t), can be carried out. Considering the experimental conditions defined by small primary current density (#104 pA/cm2) and low surface charge density (#10 pC/cm2), the relation, I0 = Iind(t) + Isigma (t) can be verified [1] leading to (after integration over the injection time) a charge balance: Qinj = Qind+Qsigma = Qp+Qsigma The secondary electron emission yield, see(t) = 1 - { Iind (t) / [Iind (t)+Isigma (t)] }, is experimentally studied as a function of Qp(t). A simulation, which corresponds to a new mathematical model describing the spatial and temporal charge trapping, computes the temporal evolution of the secondary electron emission, see(t), as a function of net trapped charge, Qp(t), for various values of the kinetic energy of the primary electrons. The comparison between experimental results and numerical simulations would permit to evaluate absorption and transfer cross sections as well as mobility of the secondary electrons.
{"title":"Analysis of Charging Kinetics of Oxide Ceramics under Short Electron Beam Irradiation: Numerical Simulation of Secondary Electron Emission","authors":"A. Aoufi, K. Zarbout, G. Damamme, G. Moya","doi":"10.1109/CEIDP.2008.4772867","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772867","url":null,"abstract":"This analysis is connected with the evolution of trapped charges, during electron injection, using a defocused electron beam of a Scanning Electron Microscope especially equipped with a secondary electron low-noise detector. Hence, during pulses of about ten ms, giving injection doses of a few pC, the measurements of the influence induced currents, I<sub>ind</sub>(t), due to the image charges Q<sub>ind</sub> (t) in the metallic holder (corresponding to the trapped charges Q<sub>p</sub> (t) in the sample) and the total secondary electron currents, I<sub>sigma</sub>(t), can be carried out. Considering the experimental conditions defined by small primary current density (#10<sup>4</sup> pA/cm<sup>2</sup>) and low surface charge density (#10 pC/cm<sup>2</sup>), the relation, I<sub>0</sub> = I<sub>ind</sub>(t) + I<sub>sigma</sub> (t) can be verified [1] leading to (after integration over the injection time) a charge balance: Q<sub>inj</sub> = Q<sub>ind</sub>+Q<sub>sigma</sub> = Q<sub>p</sub>+Q<sub>sigma</sub> The secondary electron emission yield, see(t) = 1 - { I<sub>ind</sub> (t) / [I<sub>ind</sub> (t)+I<sub>sigma</sub> (t)] }, is experimentally studied as a function of Q<sub>p</sub>(t). A simulation, which corresponds to a new mathematical model describing the spatial and temporal charge trapping, computes the temporal evolution of the secondary electron emission, see(t), as a function of net trapped charge, Q<sub>p</sub>(t), for various values of the kinetic energy of the primary electrons. The comparison between experimental results and numerical simulations would permit to evaluate absorption and transfer cross sections as well as mobility of the secondary electrons.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90769068","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772925
R. Sundararajan, D. Campbell, J. Harper, Funian Xiao, Rui Ma, K. Otto
Non-thermal pasteurization of fruit juices, such as orange juice using electrical pulses is gaining momentum due to their attractive attributes, such as less heating and more retention of taste, flavor and color. Using electrical pusles of suitable intensity (V/cm) and duration or pulsewidth (milli/micro/nano seconds), it is possible to pasteurize the juices to enhance their longevity (at room temperatures). This paper presents the results of a juice study using milli and micro pulses. Multiple pulses with optimal intervals are in general used in these applications to reduce the heat generated. Various juices including orange and lime were tested in this study. Analyses were made using microbial study and impedance spectroscopy measurements of the pulsed and the unpulsed (control) juices. Preliminary results indicate that there is a reduction in the amount of lactic acid bacterial count of the pulsed orange juice compared to the unpulsed orange juice. Impedance spectroscopy measurements also showed difference in impedance values between the pulsed and unpulsed juices. This study will shine more light on the characteristics of electrically pulsed juices and extending their shelf-life.
{"title":"Characterization of Fruit juices treated with Electrical Pulses","authors":"R. Sundararajan, D. Campbell, J. Harper, Funian Xiao, Rui Ma, K. Otto","doi":"10.1109/CEIDP.2008.4772925","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772925","url":null,"abstract":"Non-thermal pasteurization of fruit juices, such as orange juice using electrical pulses is gaining momentum due to their attractive attributes, such as less heating and more retention of taste, flavor and color. Using electrical pusles of suitable intensity (V/cm) and duration or pulsewidth (milli/micro/nano seconds), it is possible to pasteurize the juices to enhance their longevity (at room temperatures). This paper presents the results of a juice study using milli and micro pulses. Multiple pulses with optimal intervals are in general used in these applications to reduce the heat generated. Various juices including orange and lime were tested in this study. Analyses were made using microbial study and impedance spectroscopy measurements of the pulsed and the unpulsed (control) juices. Preliminary results indicate that there is a reduction in the amount of lactic acid bacterial count of the pulsed orange juice compared to the unpulsed orange juice. Impedance spectroscopy measurements also showed difference in impedance values between the pulsed and unpulsed juices. This study will shine more light on the characteristics of electrically pulsed juices and extending their shelf-life.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86298920","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772903
G. Montanari, A. Cavallini, L. Testa, S. Serra, L. Dissado
Several degradation mechanisms may affect polymeric insulation system reliability. Some authors postulate that, even in a perfect dielectric, nanoscale cavities can enlarge due to various mechanisms (from mechanical fatigue to lowering of the degradation reaction energy barrier) up to a point where highly energetic phenomena, which bring about breakdown, can be incepted. Other authors are more focused on the inherent limits of manufacturing processes, which leave cavities within the insulation system whose size is large enough to cause electron avalanches, thus a measurable partial discharge (PD) activity, from the time the system is put in service or as a function of external factors (e.g. mechanical damage, thermal shrinking, overvoltages). Given the time scale of polymeric system failures, this latter mechanism seems to be more plausible. It is therefore worthwhile to investigate in depth the degradation rates associated with PD in micrometric cavities in polymeric insulation systems subjected to AC voltage. The proposed model is based on damage accumulation on cavity surfaces caused by PD phenomena. The main degradation mechanism associated with PD is considered to be the hot-electron induced bond-breaking process. This process accumulates with time, leading to the creation of a damaged region of critical size and, ultimately, to breakdown. The proposed model describes the defect induction and growth phase until treeing phenomena start, which is, normally, the largely prevailing component of breakdown time.
{"title":"Model of ageing inception and growth from microvoids in polyethylene-based materials under AC voltage","authors":"G. Montanari, A. Cavallini, L. Testa, S. Serra, L. Dissado","doi":"10.1109/CEIDP.2008.4772903","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772903","url":null,"abstract":"Several degradation mechanisms may affect polymeric insulation system reliability. Some authors postulate that, even in a perfect dielectric, nanoscale cavities can enlarge due to various mechanisms (from mechanical fatigue to lowering of the degradation reaction energy barrier) up to a point where highly energetic phenomena, which bring about breakdown, can be incepted. Other authors are more focused on the inherent limits of manufacturing processes, which leave cavities within the insulation system whose size is large enough to cause electron avalanches, thus a measurable partial discharge (PD) activity, from the time the system is put in service or as a function of external factors (e.g. mechanical damage, thermal shrinking, overvoltages). Given the time scale of polymeric system failures, this latter mechanism seems to be more plausible. It is therefore worthwhile to investigate in depth the degradation rates associated with PD in micrometric cavities in polymeric insulation systems subjected to AC voltage. The proposed model is based on damage accumulation on cavity surfaces caused by PD phenomena. The main degradation mechanism associated with PD is considered to be the hot-electron induced bond-breaking process. This process accumulates with time, leading to the creation of a damaged region of critical size and, ultimately, to breakdown. The proposed model describes the defect induction and growth phase until treeing phenomena start, which is, normally, the largely prevailing component of breakdown time.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85785750","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772806
B. Venkatesulu, M. Thomas
One of the problems associated with outdoor polymeric insulators is tracking and erosion of the weathershed which can directly influence the reliability of the power system. Flame retardants are added to the base material to enhance its tracking and erosion resistance. Hydroxide fillers are regarded as the best flame retardants. This paper deals with studies related to nano - sized magnesium dihydroxide (MDH) and micron-sized Alumina Trihydrate (ATH) fillers as flame retardants in RTV silicone rubber. Tracking and erosion resistance studies were carried out on MDH and ATH silicone rubber composites using an inclined plane tracking and erosion (IPT) resistance tester. The MDH filled (5% by wt) composites performed much better than ATH composites in terms of eroded mass, depth of erosion, width and length of erosion. The eroded mass of MDH composite is 49.8 % that of ATH composite which can be attributed to high surface area and higher thermal stability of MDH nanofillers.
{"title":"Studies on the Tracking and Erosion Resistance of RTV Silicone Rubber Nanocomposite","authors":"B. Venkatesulu, M. Thomas","doi":"10.1109/CEIDP.2008.4772806","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772806","url":null,"abstract":"One of the problems associated with outdoor polymeric insulators is tracking and erosion of the weathershed which can directly influence the reliability of the power system. Flame retardants are added to the base material to enhance its tracking and erosion resistance. Hydroxide fillers are regarded as the best flame retardants. This paper deals with studies related to nano - sized magnesium dihydroxide (MDH) and micron-sized Alumina Trihydrate (ATH) fillers as flame retardants in RTV silicone rubber. Tracking and erosion resistance studies were carried out on MDH and ATH silicone rubber composites using an inclined plane tracking and erosion (IPT) resistance tester. The MDH filled (5% by wt) composites performed much better than ATH composites in terms of eroded mass, depth of erosion, width and length of erosion. The eroded mass of MDH composite is 49.8 % that of ATH composite which can be attributed to high surface area and higher thermal stability of MDH nanofillers.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84910529","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772809
M. Abou-Dakka, A. Bulinski, S. Bamji, M. Selsjord
Laboratory tests on field aged and unaged cables were performed using DC depolarization current measurements. Aged cables with water trees showed high dielectric losses and depolarization currents as compared with the reference, unaged cable. Both the area under the depolarization current waveform and dielectric loss factor, tandelta, increased with DC poling and the applied AC voltage, respectively. A new indicator of the insulation aging derived from the measured current is proposed to rate the degree of aging of cable insulation. This indicator increases with the poling field, and a DC poling voltage less than 50% of the nominal peak value of the cable operating voltage is sufficient to obtain reliable values. The cable insulation aging indicator could be a useful tool for monitoring the operating condition of cables in service and help utilities to develop cable replacement programs based on the actual state of the cable insulation conditions.
{"title":"Depolarization Current Measurements on Field-Aged XLPE Cable Insulation","authors":"M. Abou-Dakka, A. Bulinski, S. Bamji, M. Selsjord","doi":"10.1109/CEIDP.2008.4772809","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772809","url":null,"abstract":"Laboratory tests on field aged and unaged cables were performed using DC depolarization current measurements. Aged cables with water trees showed high dielectric losses and depolarization currents as compared with the reference, unaged cable. Both the area under the depolarization current waveform and dielectric loss factor, tandelta, increased with DC poling and the applied AC voltage, respectively. A new indicator of the insulation aging derived from the measured current is proposed to rate the degree of aging of cable insulation. This indicator increases with the poling field, and a DC poling voltage less than 50% of the nominal peak value of the cable operating voltage is sufficient to obtain reliable values. The cable insulation aging indicator could be a useful tool for monitoring the operating condition of cables in service and help utilities to develop cable replacement programs based on the actual state of the cable insulation conditions.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83284434","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772874
F. Guastavino, A. Ratto, M. Celentano, A. Zucchelli, P. Michelato
Technical standards about security and safety in buildings always include strict requirements about the resistance to the ignition and propagation of fire of electrical components. In particular both power distribution and signal transmission cable insulation must often provide the best flame retardancy possible, especially in public places and transportation systems. This paper presents the outcome of a research work involving different models of fire resistant signal transmission cables; such cables were purposely manufactured varying some design characteristics and were subjected to a fire test. The relevant performances were compared and analyzed by statistical methods such as the weibull and the design of experiment (DoE) techniques, allowing to identify the best cable morphology in order to have the highest probability to meet the standard requirements.
{"title":"Comparison Between Different Electric Signal Fire Resistant Cables Behaviour During Fire Tests","authors":"F. Guastavino, A. Ratto, M. Celentano, A. Zucchelli, P. Michelato","doi":"10.1109/CEIDP.2008.4772874","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772874","url":null,"abstract":"Technical standards about security and safety in buildings always include strict requirements about the resistance to the ignition and propagation of fire of electrical components. In particular both power distribution and signal transmission cable insulation must often provide the best flame retardancy possible, especially in public places and transportation systems. This paper presents the outcome of a research work involving different models of fire resistant signal transmission cables; such cables were purposely manufactured varying some design characteristics and were subjected to a fire test. The relevant performances were compared and analyzed by statistical methods such as the weibull and the design of experiment (DoE) techniques, allowing to identify the best cable morphology in order to have the highest probability to meet the standard requirements.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89743709","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772868
J. Crine
We have shown elsewhere that the Eyring equation can describe the electrical aging of several polymers. This equation has two main activated parameters, namely the activated energy DeltaG and the activated volume DeltaV. In this paper, we confirm our previous supposition that DeltaG is related to the C-C bond strength by providing examples deduced from the electrical aging of polyethylene and polypropylene. We can now identify the origin and nature of the activated volume DeltaV for aging and breakdown of polymers. It is shown to be somehow associated with the concentration of broken bonds and on the maximum concentration of free charges in the aged sample. With the understanding of the physical sense of the two activated parameters, it is now possible to predict the life equation of simple insulating polymers from their basic physico-chemical properties. The significance of these calculations on the interpretation of other electrical properties is also briefly discussed.
{"title":"Origin and Nature of the Activated Parameters in the Electrical Aging Equation","authors":"J. Crine","doi":"10.1109/CEIDP.2008.4772868","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772868","url":null,"abstract":"We have shown elsewhere that the Eyring equation can describe the electrical aging of several polymers. This equation has two main activated parameters, namely the activated energy DeltaG and the activated volume DeltaV. In this paper, we confirm our previous supposition that DeltaG is related to the C-C bond strength by providing examples deduced from the electrical aging of polyethylene and polypropylene. We can now identify the origin and nature of the activated volume DeltaV for aging and breakdown of polymers. It is shown to be somehow associated with the concentration of broken bonds and on the maximum concentration of free charges in the aged sample. With the understanding of the physical sense of the two activated parameters, it is now possible to predict the life equation of simple insulating polymers from their basic physico-chemical properties. The significance of these calculations on the interpretation of other electrical properties is also briefly discussed.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88531185","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772854
R. Eberhardt, H. Muhr, W. Lick, F. Baumann, G. Pukel
In times when personal safety and the security of electrical power supply become more and more important, the usage of alternative insulation fluids is demanded in large power transformers too. The minimizing of fire loads is another significant reason for new transformers. Several companies offer such alternative insulation liquids and they are already used in distribution transformers. On the other hand there is only few experience with those fluids in large power transformers. Alternative insulation liquids should be compared with mineral oil at equal conditions and voltage levels of several hundred kV AC. Comparison methods and test situations must be found. In this paper it will be shown how the new insulation liquids can be compared with conventional mineral oil and among each other.
{"title":"Comparison of alternative insulating fluids","authors":"R. Eberhardt, H. Muhr, W. Lick, F. Baumann, G. Pukel","doi":"10.1109/CEIDP.2008.4772854","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772854","url":null,"abstract":"In times when personal safety and the security of electrical power supply become more and more important, the usage of alternative insulation fluids is demanded in large power transformers too. The minimizing of fire loads is another significant reason for new transformers. Several companies offer such alternative insulation liquids and they are already used in distribution transformers. On the other hand there is only few experience with those fluids in large power transformers. Alternative insulation liquids should be compared with mineral oil at equal conditions and voltage levels of several hundred kV AC. Comparison methods and test situations must be found. In this paper it will be shown how the new insulation liquids can be compared with conventional mineral oil and among each other.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86533229","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 : 2008-10-01DOI: 10.1109/CEIDP.2008.4772787
Zhihai Xu, P. Tang, Z. Jia, Z. Guan, Liming Wang
Corrosion on grounding rod can significantly increase the grounding resistance and compromise the safety of the power system. Silicone rubber used in outdoor insulation area for its long life in adverse environments. This paper proposes a kind of conductive RTV silicone coating suitable for grounding systems. Conductive nano-particles such as carbon black and carbon fiber are added to reduce the resistivity to about 10 Omegaldrcm. Experiment results shows that this material is effective in eliminating corrosion.
{"title":"Eliminate Corrosion on Grounding System By A Conductive RTV Silicone Coating","authors":"Zhihai Xu, P. Tang, Z. Jia, Z. Guan, Liming Wang","doi":"10.1109/CEIDP.2008.4772787","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772787","url":null,"abstract":"Corrosion on grounding rod can significantly increase the grounding resistance and compromise the safety of the power system. Silicone rubber used in outdoor insulation area for its long life in adverse environments. This paper proposes a kind of conductive RTV silicone coating suitable for grounding systems. Conductive nano-particles such as carbon black and carbon fiber are added to reduce the resistivity to about 10 Omegaldrcm. Experiment results shows that this material is effective in eliminating corrosion.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78600628","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：