Results 281 to 290 of about 711,979 (342)

Contamination Identification and Classification on Composite Insulator by Visible Light Images

IEEE International Conference on High Voltage Engineering and Application, 2020
Pollution flashover occurs more easily on contaminated transmission line insulators, which causes huge losses to the power system. In order to prevent the pollution flashover, the first step is to identify the contamination grade of insulator. This paper
Tianyi Chen, Fan Li, Zixiang Wei, Zhaojing Li   +3 more
semanticscholar   +1 more source

Contamination of low-voltage insulation

1976 IEEE International Conference on Electrical Insulation, 1976
It may appear surprising that these important facts have remained undetected during the many years the test of Publication No. 112 has been in use. However, there are two good reasons for that.
openaire   +1 more source

Chemical Contamination as Causes of Electrical-Insulation Failure

Transactions of the American Institute of Electrical Engineers, 1945
Electrical-insulation failures were investigated and found to be due to chemical contamination with ionizable materials. Examples of such contamination are certain types of hand creams, soldering fluxes, and germicides in lubricating oils. Contamination mechanisms often involve operations which are otherwise insignificant in manufacturing processes ...
C. H. Braithwaite, G. L. Moses
openaire   +1 more source

Dechlorination and Reclamation of PCB-Contaminated Insulating Fluids

IEEE Power Engineering Review, 1983
A process was developed by Ontario Hydro Research to dechlorinate PCBs in contaminated insulating fluids and reclaim the insulating fluids after treatment, thus alleviating a growing environmental hazard. The contaminated fluids, containing up to several thousand milligrams of PCB per kilogram (ppm) are contacted with metallic sodium at moderate ...
W.J. Janis, J.S. Ferrie, J.M. Braun
openaire   +1 more source

Chemical oxidation of cable insulating oil contaminated soil

Chemosphere, 2011
Leaking cable insulating oil is a common source of soil contamination of high-voltage underground electricity cables in many European countries. In situ remediation of these contaminations is very difficult, due to the nature of the contamination and the high concentrations present.
Jinlan Xu, Pancras, T., Grotenhuis, J.T.C.   +2 more
openaire   +2 more sources

Control of insulator contamination in substations

Journal of the Franklin Institute, 1972
Abstract This paper discusses in detail the procedures used by the Florida Power & Light Company which have resulted in 6 years of virtually “flashover proof” substations. The successful prevention of flashovers due to contamination in its 69, 138 and 240 kV substations and switching stations is described.
openaire   +1 more source

Ageing behaviour of contaminated complex insulation

Proceedings of 1995 IEEE 5th International Conference on Conduction and Breakdown in Solid Dielectrics, 2002
Composite insulating materials play an important role in the electrical equipment industry because of their balanced mechanical and electrical properties. Composite materials are totally homogenous and contain an organic material as binder and an inorganic material as reinforcing material. Any inhomogeneity is probably due to contaminations.
A. Hossam-Eldin, A.R. Abdelaziz, A.A. Lofty   +2 more
openaire   +1 more source

Contamination performance of polymeric insulating materials used for outdoor insulation applications

IEEE Transactions on Electrical Insulation, 1989
Results of a laboratory evaluation of the contamination performance of silicone rubber and EPDM (ethylene propylenediene monomer) rubber polymers are presented. it is shown that due to significant material differences, these polymers cannot be evaluated using experimental conditions standardized for porcelain and glass. Test conditions which yield good
R.S. Gorur, S. Sundhara Rajan, O.G. Amburgey   +2 more
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Contamination flashover theory and insulator design

Journal of the Franklin Institute, 1972
Abstract The long, unpleasant history of contamination flashover is reviewed briefly, followed by a discussion of some of the physical processes involved. The numerous flashover theories are critically examined, and recent experimental results are presented.
openaire   +1 more source

External insulation strength assessment of contaminated insulator based on acoustic emission

2012 Power Engineering and Automation Conference, 2012
External insulation strength assessment of contaminated insulator is proposed in this paper using the acoustic emission signals generated when the polluted insulator flashover discharges. Systematic artificial contamination experiments were done. The acoustic emission signals generated from the polluted insulator were monitored by the sound monitoring ...
Li Zipin, Li Hongling, Wang Youyin
openaire   +1 more source