Pub Date : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526028
F. Eppelein, C. Weindl
Medium voltage cables with oil impregnated paper insulation are still to be found numerously in many distribution grids. Many of these cable lines have been installed dozens of years ago, so there is a strong interest in getting an overview on the condition of the insulation of these cables. For this purpose, a long lasting aging experiment has been performed in the laboratory, where multiple cables of all kinds of different service histories have been artificially aged in an accelerated way by means of thermal and electrical stresses and combinations of these. During this process, the diagnostic parameters like dissipation factor and partial discharges have been continuously recorded at power frequency (50 Hz). The gathered data from the laboratory experiment serves as basis for field measurements, which are being carried out. The necessary measurement equipment has been engineered and integrated in a cable test van. This consists of two different voltage sources (50 Hz and 0.1 Hz), a measurement unit on top of a high voltage divider and a computer based control and data acquisition system. A correlation of these two measurements promises enhanced diagnostic relevance for the condition assessment of medium voltage networks. Based on numerous field measurements carried out in the local distribution network, new approaches in the correlation of measurements at two different frequencies of test voltages are to be created. This includes a reference to other already well established methods. However, the reference to other methods needs to be verified in a more detailed way.
{"title":"Aspects interpreting PILC cables' diagnostic parameters measured at different test voltage frequencies","authors":"F. Eppelein, C. Weindl","doi":"10.1109/DIAGNOSTIKA.2018.8526028","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526028","url":null,"abstract":"Medium voltage cables with oil impregnated paper insulation are still to be found numerously in many distribution grids. Many of these cable lines have been installed dozens of years ago, so there is a strong interest in getting an overview on the condition of the insulation of these cables. For this purpose, a long lasting aging experiment has been performed in the laboratory, where multiple cables of all kinds of different service histories have been artificially aged in an accelerated way by means of thermal and electrical stresses and combinations of these. During this process, the diagnostic parameters like dissipation factor and partial discharges have been continuously recorded at power frequency (50 Hz). The gathered data from the laboratory experiment serves as basis for field measurements, which are being carried out. The necessary measurement equipment has been engineered and integrated in a cable test van. This consists of two different voltage sources (50 Hz and 0.1 Hz), a measurement unit on top of a high voltage divider and a computer based control and data acquisition system. A correlation of these two measurements promises enhanced diagnostic relevance for the condition assessment of medium voltage networks. Based on numerous field measurements carried out in the local distribution network, new approaches in the correlation of measurements at two different frequencies of test voltages are to be created. This includes a reference to other already well established methods. However, the reference to other methods needs to be verified in a more detailed way.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125002455","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 : 2018-09-01DOI: 10.1109/diagnostika.2018.8526032
{"title":"Autours Index","authors":"","doi":"10.1109/diagnostika.2018.8526032","DOIUrl":"https://doi.org/10.1109/diagnostika.2018.8526032","url":null,"abstract":"","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126118740","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526128
Ann-Catrin Müller, C. Weindl, J. Linossier, J. Schramm, L. Benkert
A higher percentage of the electrical distribution grid in Germany is still working with the elderly paper insulated lead covered (PILC) cables. For a cost-efficient asset-management of electrical grids, the status and remaining lifetime of electrical equipment is of highest interest. Diagnostic systems on the market do not deliver a significant and detailed information about the ageing status. Due to this fact, a longer lasting project is set up with the goal to artificially age, analyse and diagnose the ageing behaviour of PILC MV-cables. The general task of the accelerated ageing system is to apply enforced stress conditions to selected test cables out of field operation. In this way, defined artificial and accelerated ageing conditions are generated to provoke faster but realistic ageing processes. The characteristic diagnostic values are regularly acquired by a specific automatized measurement and control system together with necessary additional data, like e.g. temperatures, applied voltages and currents, which are controlled by sensors. In the article the methods, the design and the key values for the projection of the system will be presented. Using this approach, it is possible to simulate the ageing of field equipment during its operation over several decades within an experimental time span of several months.
{"title":"Requirements of a system for the artificial ageing of paper insulated lead covered medium voltage cables","authors":"Ann-Catrin Müller, C. Weindl, J. Linossier, J. Schramm, L. Benkert","doi":"10.1109/DIAGNOSTIKA.2018.8526128","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526128","url":null,"abstract":"A higher percentage of the electrical distribution grid in Germany is still working with the elderly paper insulated lead covered (PILC) cables. For a cost-efficient asset-management of electrical grids, the status and remaining lifetime of electrical equipment is of highest interest. Diagnostic systems on the market do not deliver a significant and detailed information about the ageing status. Due to this fact, a longer lasting project is set up with the goal to artificially age, analyse and diagnose the ageing behaviour of PILC MV-cables. The general task of the accelerated ageing system is to apply enforced stress conditions to selected test cables out of field operation. In this way, defined artificial and accelerated ageing conditions are generated to provoke faster but realistic ageing processes. The characteristic diagnostic values are regularly acquired by a specific automatized measurement and control system together with necessary additional data, like e.g. temperatures, applied voltages and currents, which are controlled by sensors. In the article the methods, the design and the key values for the projection of the system will be presented. Using this approach, it is possible to simulate the ageing of field equipment during its operation over several decades within an experimental time span of several months.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"57 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116515956","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526134
Bo Zhang, Jiang Wu, Xiaoquan Zheng
The space environment will charge the surface of the spacecraft. Due to the low discharge ability of the dielectric material, it may cause the surface discharge of the spacecraft and affect the normal work of the spacecraft. Polyimide is a typical dielectric material on the spacecraft, this paper attempts to improve the surface discharge ability by modifying polyimide with nano-ZnO. The research method is based on the surface potential decay platform, which is an intuitive approach to evaluate the states of surface charging. The surface potential decay characteristics of pure polyimide and its modified samples are tested. The surface potential decay mechanism of the dielectric is analyzed by calculating the trap characteristics. Results show that the surface potential of ZnO modified polyimide has less decrement and rate of decay than that of the pure polyimide. The deep trap density of electron trap and hole trap density is less than that of pure polyimide, the shallow trap of pure polyimide is the lowest. The change of electron trap level is small, while the hole trap level increases.
{"title":"Study on the trap properties of nano-ZnO modified polyimide based on surface potential decay method","authors":"Bo Zhang, Jiang Wu, Xiaoquan Zheng","doi":"10.1109/DIAGNOSTIKA.2018.8526134","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526134","url":null,"abstract":"The space environment will charge the surface of the spacecraft. Due to the low discharge ability of the dielectric material, it may cause the surface discharge of the spacecraft and affect the normal work of the spacecraft. Polyimide is a typical dielectric material on the spacecraft, this paper attempts to improve the surface discharge ability by modifying polyimide with nano-ZnO. The research method is based on the surface potential decay platform, which is an intuitive approach to evaluate the states of surface charging. The surface potential decay characteristics of pure polyimide and its modified samples are tested. The surface potential decay mechanism of the dielectric is analyzed by calculating the trap characteristics. Results show that the surface potential of ZnO modified polyimide has less decrement and rate of decay than that of the pure polyimide. The deep trap density of electron trap and hole trap density is less than that of pure polyimide, the shallow trap of pure polyimide is the lowest. The change of electron trap level is small, while the hole trap level increases.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122087455","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526135
S. Dudzik, A. Jakubas
The study aimed to perform the non-destructive testing of the homogeneity of the SMC structure using an infrared camera. Flat reference samples and various defect systems were made, among others, inclusions of polymer and Fe-based filler were added, impurities and cracks were prepared. The heating and cooling of material samples was recorded as the sequence of infrared images. It allowed to detect of the areas with different thermal properties. Based on the results of thermographic measurements, a comparative analysis of data from samples with defects and without defects was made. In addition, inference was made on the basis of information on crafted defects. It is assumed that it will be possible to develop new defect detection methods in SMC materials based on the obtained temperature distribution images. This will enable you to identify defects such as inclusions, lack of homogeneity, cracks or distortions in the structure of the investigated material.
{"title":"Diagnostics of the $Fe$-based soft magnetics composites using active thermography","authors":"S. Dudzik, A. Jakubas","doi":"10.1109/DIAGNOSTIKA.2018.8526135","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526135","url":null,"abstract":"The study aimed to perform the non-destructive testing of the homogeneity of the SMC structure using an infrared camera. Flat reference samples and various defect systems were made, among others, inclusions of polymer and Fe-based filler were added, impurities and cracks were prepared. The heating and cooling of material samples was recorded as the sequence of infrared images. It allowed to detect of the areas with different thermal properties. Based on the results of thermographic measurements, a comparative analysis of data from samples with defects and without defects was made. In addition, inference was made on the basis of information on crafted defects. It is assumed that it will be possible to develop new defect detection methods in SMC materials based on the obtained temperature distribution images. This will enable you to identify defects such as inclusions, lack of homogeneity, cracks or distortions in the structure of the investigated material.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"525 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123205104","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526137
O. Michal, V. Mentlík
Electro-insulating materials are used in various types of applications. One of the most common application is electrical rotating machines, where it has the function as ellectrical insulation of coils. Commonly resins are used as matrix materials for layered composites used as complex electro-insulating material, but for evaluation which type of resin is better, we must conduct several experiments (dielectric, structural, mechanical etc.) that show the best candidate. This paper presents an experiment where three types of resins (epoxy, polyester, silicone resins) are submitted to thermal aging process under three different temperatures and compared to each other by their dielectric properties. Evaluation of these commercial resins are done mainly for possible future nanocomposite application.
{"title":"Influence of Thermal Degradation on the Dielectric Properties of Polymer Composites","authors":"O. Michal, V. Mentlík","doi":"10.1109/DIAGNOSTIKA.2018.8526137","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526137","url":null,"abstract":"Electro-insulating materials are used in various types of applications. One of the most common application is electrical rotating machines, where it has the function as ellectrical insulation of coils. Commonly resins are used as matrix materials for layered composites used as complex electro-insulating material, but for evaluation which type of resin is better, we must conduct several experiments (dielectric, structural, mechanical etc.) that show the best candidate. This paper presents an experiment where three types of resins (epoxy, polyester, silicone resins) are submitted to thermal aging process under three different temperatures and compared to each other by their dielectric properties. Evaluation of these commercial resins are done mainly for possible future nanocomposite application.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122284236","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526095
Jian Li, Jinghan Zhou, Chenmeng Xiang, Zhengyong Huang, Jianfeng He, M. A. Mehmood
Vegetable insulating oils have different chemical compositions as compared to mineral oils, hence, dissolved gas characteristics under thermal and electrical faults have differences, thus fault diagnostic methods based on Dissolved gas analysis (DGA) used for mineral oil-filled transformers cannot be used to investigate vegetable oil-filled transformers. This paper presents experimental results of dissolved gases in the camellia insulating oil under typical thermal and electrical faults in transformers. The thermal fault simulation experiments include low temperature, medium temperature and high temperature, and the electrical fault simulation experiments include partial, breakdown and arc discharges. Experimental results show that except CO and CO2, H2 and C2H6 were main characteristic gases under thermal faults, the percentage contents of H2 decreases while CH4, C2H4 and C2H6 increases with the temperature increase. In addition, H2 and CH4 were main characteristic gases under partial discharge faults, C2H2 was the main characteristic gas under breakdown faults, and C2H2 and C2H4 were main characteristic gases under arc discharge faults. Characteristic parameters were extracted based on DGA, and fault diagnostic methods of camellia insulating oil-filled transformer were proposed, including graphic diagnostic method and none code diagnostic method. Results showed that faults could be effectively analyzed by triangle and pentagon diagnostic methods as well as none code diagnostic method. H2, C2H4, C2H2&H2, CH4, C2H6 Triangle method and none code diagnostic method are better fault diagnostic methods for camellia insulating oil.
{"title":"Novel Approaches of DGA to Transformers Filled with Natural Ester Based Insulating Oils","authors":"Jian Li, Jinghan Zhou, Chenmeng Xiang, Zhengyong Huang, Jianfeng He, M. A. Mehmood","doi":"10.1109/DIAGNOSTIKA.2018.8526095","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526095","url":null,"abstract":"Vegetable insulating oils have different chemical compositions as compared to mineral oils, hence, dissolved gas characteristics under thermal and electrical faults have differences, thus fault diagnostic methods based on Dissolved gas analysis (DGA) used for mineral oil-filled transformers cannot be used to investigate vegetable oil-filled transformers. This paper presents experimental results of dissolved gases in the camellia insulating oil under typical thermal and electrical faults in transformers. The thermal fault simulation experiments include low temperature, medium temperature and high temperature, and the electrical fault simulation experiments include partial, breakdown and arc discharges. Experimental results show that except CO and CO<inf>2</inf>, H<inf>2</inf> and C<inf>2</inf>H<inf>6</inf> were main characteristic gases under thermal faults, the percentage contents of H<inf>2</inf> decreases while CH<inf>4</inf>, C<inf>2</inf>H<inf>4</inf> and C<inf>2</inf>H<inf>6</inf> increases with the temperature increase. In addition, H<inf>2</inf> and CH<inf>4</inf> were main characteristic gases under partial discharge faults, C<inf>2</inf>H<inf>2</inf> was the main characteristic gas under breakdown faults, and C<inf>2</inf>H<inf>2</inf> and C<inf>2</inf>H<inf>4</inf> were main characteristic gases under arc discharge faults. Characteristic parameters were extracted based on DGA, and fault diagnostic methods of camellia insulating oil-filled transformer were proposed, including graphic diagnostic method and none code diagnostic method. Results showed that faults could be effectively analyzed by triangle and pentagon diagnostic methods as well as none code diagnostic method. H<inf>2</inf>, C<inf>2</inf>H<inf>4</inf>, C<inf>2</inf>H<inf>2</inf>&H<inf>2</inf>, CH<inf>4</inf>, C<inf>2</inf>H<inf>6</inf> Triangle method and none code diagnostic method are better fault diagnostic methods for camellia insulating oil.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130258934","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526025
Jan Fulnečck, S. Mišák
This article presents the comparison of two diagnostics methods, widely used for stator winding asymmetry detection. Several laboratory measurements were performed on induction motor and both diagnostics methods were used. The axial magnetic stray flux was measured by a special coil, mounted on the top of the fan cover, while the stator currents were recorded by an oscilloscope. All signals were analyzed and compared. Goal of the whole experiment was to compare sensitivity and suitability of described methods for low-voltage induction motor fault diagnostics.
{"title":"Stator current and axial magnetic flux analysis of induction motor","authors":"Jan Fulnečck, S. Mišák","doi":"10.1109/DIAGNOSTIKA.2018.8526025","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526025","url":null,"abstract":"This article presents the comparison of two diagnostics methods, widely used for stator winding asymmetry detection. Several laboratory measurements were performed on induction motor and both diagnostics methods were used. The axial magnetic stray flux was measured by a special coil, mounted on the top of the fan cover, while the stator currents were recorded by an oscilloscope. All signals were analyzed and compared. Goal of the whole experiment was to compare sensitivity and suitability of described methods for low-voltage induction motor fault diagnostics.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134103042","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526026
T. Maier, D. Lick, T. Leibfried
The paper presents a high-frequency model of a medium-voltage cable joint. The joint model enables calculation of the transmission line parameters over the joint length in the frequency domain with all geometrical changes and all variations of the materials. The model is based on a well-known simulation model for energy cables, which has been enhanced to represent a cable joint. The presented work introduces a connection joint with a geometrical field regulation. This type of joint was chosen because, at higher voltages, such types of field regulation are used most commonly. The model calculates the transmission line parameters over a broad frequency band with a detailed representation of a real joint.
{"title":"A High-Frequency Simulation Model of a MV Cable Joint","authors":"T. Maier, D. Lick, T. Leibfried","doi":"10.1109/DIAGNOSTIKA.2018.8526026","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526026","url":null,"abstract":"The paper presents a high-frequency model of a medium-voltage cable joint. The joint model enables calculation of the transmission line parameters over the joint length in the frequency domain with all geometrical changes and all variations of the materials. The model is based on a well-known simulation model for energy cables, which has been enhanced to represent a cable joint. The presented work introduces a connection joint with a geometrical field regulation. This type of joint was chosen because, at higher voltages, such types of field regulation are used most commonly. The model calculates the transmission line parameters over a broad frequency band with a detailed representation of a real joint.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132190408","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 : 2018-09-01DOI: 10.1109/DIAGNOSTIKA.2018.8526027
Z. Konečná, P. Žák
Each stress factor initiates different degradation processes. Study of these factors and experiments describing behavior of monitored electrical equipment are important for understanding of stressors synergies. The work is focused on gamma-irradiation as one of the most aggressive degradation factors in nuclear power plants. The aim of this paper is to compare mechanical properties (Elongation at Break - EaB) of dielectric material of a coaxial cable and its electrical properties. Experiments were conducted on two types of coaxial cable with a different kind of dielectric material: Teflon (PTFE) and polyethylene (PE). Monitoring of EaB is commonly used and accepted as a reference method for determination of residual equipment lifetime. However, this destructive testing method is not suitable for the use in power plants. Non-destructive electrical testing is the promising trend in nuclear industry.
{"title":"Changes of Electrical Properties of Coaxial Cables Exposed to Gamma-irradiation","authors":"Z. Konečná, P. Žák","doi":"10.1109/DIAGNOSTIKA.2018.8526027","DOIUrl":"https://doi.org/10.1109/DIAGNOSTIKA.2018.8526027","url":null,"abstract":"Each stress factor initiates different degradation processes. Study of these factors and experiments describing behavior of monitored electrical equipment are important for understanding of stressors synergies. The work is focused on gamma-irradiation as one of the most aggressive degradation factors in nuclear power plants. The aim of this paper is to compare mechanical properties (Elongation at Break - EaB) of dielectric material of a coaxial cable and its electrical properties. Experiments were conducted on two types of coaxial cable with a different kind of dielectric material: Teflon (PTFE) and polyethylene (PE). Monitoring of EaB is commonly used and accepted as a reference method for determination of residual equipment lifetime. However, this destructive testing method is not suitable for the use in power plants. Non-destructive electrical testing is the promising trend in nuclear industry.","PeriodicalId":211666,"journal":{"name":"2018 International Conference on Diagnostics in Electrical Engineering (Diagnostika)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115894352","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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