Results 271 to 280 of about 4,358 (304)

Performance and Diagnostics of Biologically Contaminated Insulators

2006 IEEE 8th International Conference on Properties and applications of Dielectric Materials, 2006
Biological growth has been observed on insulators installed all over the world. However, so far, its impact on insulator performance is not well known. This paper summarizes a majority of the work published in the field. Based on the gathered experiences, it can be concluded that microbiological growth is unlikely to cause severe degradation of the ...
S. Gubanski, A. Dernfalk, S. Wallstrom, S. Karlsson   +3 more
openaire   +1 more source

Remote Insulator Contamination Monitoring System

IEEE Power Engineering Review, 1997
erful features for the formulation of appropriate abstractions for the desired application. But programming is always easier if a specialized language is already available for the creation of similar applications. Specialized applications should use dedicated computational engines where the developer can build and compose with high level constructs. In
C.N. Richards, J.D. Renowden
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Wetting Processes on a Contaminated Insulator Surface

IEEE Transactions on Power Apparatus and Systems, 1982
This paper presents the theoretical aspects and the experimental results of a study carried out at Ecole Polytechnique de Montrdal on wetting processes on a contaminated insulator surface. Four wetting processes for clean-fog test using the precontamination method are distinguished, namely, collision of water droplets with the insulator surface ...
M. Leclerc, R.-P. Bouchard, Y. Gervais, D. Mukhedkar   +3 more
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
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Investigation on composite insulators in contaminated areas

Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2003
The usage of composite insulators in various contaminated areas is increasing prominently in recent years. Most of composite insulators are operating in heavy or medium pollution environment in China. As the exposure time in the field prolonging, the change of hydrophobicity and the build-up of pollution layer directly affect pollution performance of ...
null Cheng Zixia, null Liang Xidong, null Wang Yongyong, null Wang Xun, null Zhou Yuanxiang, null Li Zhi   +5 more
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Examination of contamination on electrical insulators by XPS

Surface and Interface Analysis, 1979
Abstract A method is described which allows samples to be taken form the surface of electrical insulators which suffer electrical breakdown. The insulator does not have to be removed form its immediate environment. The contaminant is removed by ‘stripping’ it off with adhesive tape and the tape is subsequently examined by XPS.
openaire   +1 more source

A study on anti-contamination design of suspension insulators-a stress grading insulator

IEEE Power Engineering Society Summer Meeting,, 2003
Insulator contamination is one of many serious problems for power systems. Outages due to insulator contamination flashover may affect a wide area and continue for a long time. Also, the corona noise causes radio and TV interference. Therefore, efforts have been made by many around the world to prevent such phenomena.
M. Akizuki, O. Fujii, S. Ito, T. Irie, S. Nishimura   +4 more
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Effect of solid and contaminants in gaseous insulation

1955 CONFERENCE ON ELECTRICAL INSULATION, 1955
Solid and gaseous dielectrics are both used for electrical insulation, either singly or in combination. Where solid is used as a major component, the detrimental effect of gases, such as air voids, has been discussed at length by various investigators. However, little has been reported on the effect of solid materials to the gaseous insulation.
T. W. Liao, G. Camilli
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
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Influence of sugar as contaminant on outdoor insulation characteristics of RTV coating insulators

2010 Annual Report Conference on Electrical Insulation and Dielectic Phenomena, 2010
This paper describes the influence of sugar in contaminant to outdoor insulation characteristics of RTV coating insulator. First of all, field tests were carried out to analyze the pollution layer condition of field discharge insulators. Then RTV coating was selected to eliminate the pollution discharge, and the differences of surface condition ...
null Hongwei Mei, null Yingke Mao, null Liming Wang, null Zhicheng Guan   +3 more
openaire   +1 more source