Pub Date : 1985-09-01DOI: 10.1109/EIC.1985.7458589
M. Markovitz, W. H. Gottung, G. D. McClary, J.R. Richute, W. R. Schultz, J. D. Sheaffer
A new, third generation, impregnating resin has been developed which uses “controllable reactivity” chemistry resulting in polyether linkages. This resin impregnant is capable of producing better chemical resistance, improved electrical properties, and superior thermal properties, and a long shelf life with low viscosity for thorough impregnation when compared with other commercially available epoxy or polyester resin impregnants.
{"title":"General electric's third generation VPI resin","authors":"M. Markovitz, W. H. Gottung, G. D. McClary, J.R. Richute, W. R. Schultz, J. D. Sheaffer","doi":"10.1109/EIC.1985.7458589","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458589","url":null,"abstract":"A new, third generation, impregnating resin has been developed which uses “controllable reactivity” chemistry resulting in polyether linkages. This resin impregnant is capable of producing better chemical resistance, improved electrical properties, and superior thermal properties, and a long shelf life with low viscosity for thorough impregnation when compared with other commercially available epoxy or polyester resin impregnants.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127792073","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458601
J. Conroy
While polybutadiene resins have been around for a good while, their full capabilities have not been realized. A properly formulated system can provide both the electrical and electronics industry with a superior insulating system.
{"title":"The use of a modified polybutadiene resin system for electrical and electronic applications","authors":"J. Conroy","doi":"10.1109/EIC.1985.7458601","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458601","url":null,"abstract":"While polybutadiene resins have been around for a good while, their full capabilities have not been realized. A properly formulated system can provide both the electrical and electronics industry with a superior insulating system.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130405192","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458612
K. Lin
Space factor is used to determine the compactness of a processed transformer core. It is desirable that the method used for determination of the space-factor represents that of the actual core. Several methods are available for determining space factor, including: the ASTM 719-75 lamination stack method, the wound toroid method, and the stacked core model method.
{"title":"Space factor of amorphous metal laminations","authors":"K. Lin","doi":"10.1109/EIC.1985.7458612","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458612","url":null,"abstract":"Space factor is used to determine the compactness of a processed transformer core. It is desirable that the method used for determination of the space-factor represents that of the actual core. Several methods are available for determining space factor, including: the ASTM 719-75 lamination stack method, the wound toroid method, and the stacked core model method.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123915812","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458617
C. Rickson
Engineers are now aware of the resultant insulation degradation that may be caused by stator core damage. Visual location is often simple. However a deep seated fault is not conspicuous and it is not generally appreciated that a coil burn out can be caused by shorted laminations which in turn further precipitates the iron fault.
{"title":"A new technique for core lamination testing","authors":"C. Rickson","doi":"10.1109/EIC.1985.7458617","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458617","url":null,"abstract":"Engineers are now aware of the resultant insulation degradation that may be caused by stator core damage. Visual location is often simple. However a deep seated fault is not conspicuous and it is not generally appreciated that a coil burn out can be caused by shorted laminations which in turn further precipitates the iron fault.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116724383","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458597
H. Neidhart
The US market for small electric motors is undergoing rapid and fundamental changes due to major shifts in the motor using industries and to advances in the technologies affecting motor design, construction, and application. Traditional users and established customers are being replaced by high technology applications requiring sophisticated system design engineering and innovative motor solutions.
{"title":"Small motor market trends","authors":"H. Neidhart","doi":"10.1109/EIC.1985.7458597","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458597","url":null,"abstract":"The US market for small electric motors is undergoing rapid and fundamental changes due to major shifts in the motor using industries and to advances in the technologies affecting motor design, construction, and application. Traditional users and established customers are being replaced by high technology applications requiring sophisticated system design engineering and innovative motor solutions.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128042303","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458636
H. Pops
Because of stringent demands imposed upon rod producers by manufacturers of magnet wire, the highest quality copper being produced today is usually channelled towards this very important segment of the wire industry. Unfortunately, there are no existing specifications presently in use that can predict quantitively such factors as drawability, annealing behaviour, surface quality, and conformability. Inasmuch as ASTM specification B49 (Hot-rolled copper redraw rod for electrical purposes) describes only very general requirements such as 99.90% copper, tensile elongation exceeding 30%, conductivity greater than 100% IACS and surface quality “free of all imperfections not consistent with good commercial practice”, a wide spectrum of rod grades having considerable variation in quality frequently finds its way into the magnet wire marketplace. Consequently, a need exists to replace subjective opinions concerning copper rod quality with meaningful parameters that not only can be accurately measured, but, equally important, can give some estimate of processing capability and final (bare) wire quality. The purpose of this paper is to help fill this void and remove some of the guesswork and inconsistencies frequently employed to assess rod performance. No attempt will be made to develop a working set of specifications.
{"title":"Copper rod requirements for magnet wire","authors":"H. Pops","doi":"10.1109/EIC.1985.7458636","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458636","url":null,"abstract":"Because of stringent demands imposed upon rod producers by manufacturers of magnet wire, the highest quality copper being produced today is usually channelled towards this very important segment of the wire industry. Unfortunately, there are no existing specifications presently in use that can predict quantitively such factors as drawability, annealing behaviour, surface quality, and conformability. Inasmuch as ASTM specification B49 (Hot-rolled copper redraw rod for electrical purposes) describes only very general requirements such as 99.90% copper, tensile elongation exceeding 30%, conductivity greater than 100% IACS and surface quality “free of all imperfections not consistent with good commercial practice”, a wide spectrum of rod grades having considerable variation in quality frequently finds its way into the magnet wire marketplace. Consequently, a need exists to replace subjective opinions concerning copper rod quality with meaningful parameters that not only can be accurately measured, but, equally important, can give some estimate of processing capability and final (bare) wire quality. The purpose of this paper is to help fill this void and remove some of the guesswork and inconsistencies frequently employed to assess rod performance. No attempt will be made to develop a working set of specifications.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124748641","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458580
A. Rodriguez, H. Nour, F. Wang, S. Dale
Contamination on power system insulation can cause flashovers and subsequent outages when moisture deposits on the surface of the insulators to form electrolytes. Fog and light drizzle have been observed to be the most conducive form of moisture leading to flashovers; whereas, rain will wash off most of the soluble contaminants on the insulation's surface. The initial wetting is therefore a critical stage in the flashover process of contaminated insulators. This paper describes flashover tests made in a fog chamber on dc energized suspension insulators. The test insulators were preheated and the effect of the insulator's relative surface temperature on the flashover voltage was noted. The test results indicate that if the insulator's body heat can keep the surface sufficiently dry through this critical wetting stage, there can be a significant increase in the flashover voltage: as high as four times that of an insulator with a surface temperature equal to the air temperature and under the same contamination and fog conditions. This finding could be applied to abate contamination problems on insulation at severe pollution sites. To generate the required heating, an impedance element can be embedded in an insulator with a castable dielectric body. Calculations indicate that the energy necessary to obtain this internal body heating effect will be comparable to the energy losses due to leakage current and partial arcing caused by the contaminant layer.
{"title":"Effect of insulator surface temperature on the flashover voltage of outdoor insulators","authors":"A. Rodriguez, H. Nour, F. Wang, S. Dale","doi":"10.1109/EIC.1985.7458580","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458580","url":null,"abstract":"Contamination on power system insulation can cause flashovers and subsequent outages when moisture deposits on the surface of the insulators to form electrolytes. Fog and light drizzle have been observed to be the most conducive form of moisture leading to flashovers; whereas, rain will wash off most of the soluble contaminants on the insulation's surface. The initial wetting is therefore a critical stage in the flashover process of contaminated insulators. This paper describes flashover tests made in a fog chamber on dc energized suspension insulators. The test insulators were preheated and the effect of the insulator's relative surface temperature on the flashover voltage was noted. The test results indicate that if the insulator's body heat can keep the surface sufficiently dry through this critical wetting stage, there can be a significant increase in the flashover voltage: as high as four times that of an insulator with a surface temperature equal to the air temperature and under the same contamination and fog conditions. This finding could be applied to abate contamination problems on insulation at severe pollution sites. To generate the required heating, an impedance element can be embedded in an insulator with a castable dielectric body. Calculations indicate that the energy necessary to obtain this internal body heating effect will be comparable to the energy losses due to leakage current and partial arcing caused by the contaminant layer.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"898 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123261416","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458616
C. M. Evans
The objective of this paper is to inform and familiarize you as equipment OEM's, material manufacturers, utilities and large-end users with a brief history of the “Electrical Apparatus Service Association”, referred to as “EASA” and how the Association helps build the technical competence, proficiency, advancement and demand for excellence within its membership.
{"title":"“EASA” industry's answer for todays technical needs","authors":"C. M. Evans","doi":"10.1109/EIC.1985.7458616","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458616","url":null,"abstract":"The objective of this paper is to inform and familiarize you as equipment OEM's, material manufacturers, utilities and large-end users with a brief history of the “Electrical Apparatus Service Association”, referred to as “EASA” and how the Association helps build the technical competence, proficiency, advancement and demand for excellence within its membership.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131955550","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458568
M. Epstein
Modern manufacturing entered a revolutionary phase approximately 10 years ago with the introduction of the computer to the workplace. The first state of this still-devolving process was labeled computer-aided design (CAD) and computer-aided manufacturing (CAM). This early technology is now strongly established in some industries, including segments of the plastics processing industry. CAD-CAM is now giving way to a more advanced concept, known as CIMS (Computer Integrated Manufacturing Systems), in which all operations within a manufacturing complex, from accounting to inventory control, are controlled to obtain the most efficiency from the system. These developments will inevitably influence the manufacture of electrical insulation systems.
{"title":"Computer integrated manufacturing systems and insulation analysis","authors":"M. Epstein","doi":"10.1109/EIC.1985.7458568","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458568","url":null,"abstract":"Modern manufacturing entered a revolutionary phase approximately 10 years ago with the introduction of the computer to the workplace. The first state of this still-devolving process was labeled computer-aided design (CAD) and computer-aided manufacturing (CAM). This early technology is now strongly established in some industries, including segments of the plastics processing industry. CAD-CAM is now giving way to a more advanced concept, known as CIMS (Computer Integrated Manufacturing Systems), in which all operations within a manufacturing complex, from accounting to inventory control, are controlled to obtain the most efficiency from the system. These developments will inevitably influence the manufacture of electrical insulation systems.","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125744303","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 : 1985-09-01DOI: 10.1109/EIC.1985.7458571
J. W. Roberts, Sahag Ohanesian
1. A new V.P.I. tape has been developed which exhibits: a) The physical strength and flexibility for high speed taping b) Good impregnation properties c) Compatibility with a range of commercially available V.P.I. resins d) Outstanding electrical properties e) Long shelf-life f) No history of dermatitis problems
{"title":"Dielectric analysis of a vacuum pressure impregnation process to evaluate impregnating characteristics of a newly developed V.P.I, tape","authors":"J. W. Roberts, Sahag Ohanesian","doi":"10.1109/EIC.1985.7458571","DOIUrl":"https://doi.org/10.1109/EIC.1985.7458571","url":null,"abstract":"1. A new V.P.I. tape has been developed which exhibits: a) The physical strength and flexibility for high speed taping b) Good impregnation properties c) Compatibility with a range of commercially available V.P.I. resins d) Outstanding electrical properties e) Long shelf-life f) No history of dermatitis problems","PeriodicalId":188957,"journal":{"name":"1985 EIC 17th Electrical/Electronics Insulation Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125500487","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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