Results 161 to 170 of about 560,992 (202)

Contamination Flashover Performance of Insulators for UHV

IEEE Transactions on Power Apparatus and Systems, 1978
The results of contamination tests performed on suspension insulators and posts in a fog chamber at 60 Hz voltages up to 1450/ 13 kV are reported. Data are presented on the flashover voltage of single standard and antifog insulator strings as long as 11.5m.
H. M. Schneider, C. W. Nicholls
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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
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An artificial contamination method for composite insulators

IEEE Transactions on Power Delivery, 2000
Summary form only given, as follows. In order to better simulate the natural pollution accumulation on composite insulators, a new artificial contamination method has been developed. It is based on mixing dry contamination particles with a low amount of atomized salt solution by means of a specially designed mixing nozzle.
G. Besztercey, G.G. Karady
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The mechanism of the contamination of porcelain insulators

Journal of the Institution of Electrical Engineers - Part II: Power Engineering, 1944
An analysis of the nature of the air-borne particles which constitute the main source of contamination on outdoor porcelain insulators, and of the forces acting upon them in the electrostatic field around an insulator, suggests that these forces are inadequate to account completely for the observed distribution and the quantity of the deposits on ...
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Flashovers of Suspension Insulators Due to Contamination

Transactions of the American Institute of Electrical Engineers, 1948
Flashover of suspension insulators on steel tower lines, traceable to an accumulation of dirt followed by a deposit of moisture, has been the source of numerous outages of high-voltage transmission lines. The aim of the investigation described in this paper was to determine means of increasing the insulation level of existing lines under fog and dirt ...
H. A. Adler, W. H. Wickham, M. S. Oldacre   +2 more
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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
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Flashover on contaminated insulators with different diameters

IEEE Transactions on Electrical Insulation, 1991
The influence of the diameter on contamination flashover/withstand voltage of cylindrical insulators was investigated both for AC and DC. The increase in diameter of a cylindrical insulator significantly lowers the contaminated flashover/withstand voltage.
R. Matsuoka, S. Ito, K. Sakanishi, K. Naito   +3 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
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Surface discharges on contaminated epoxy insulators

IEEE Transactions on Electrical Insulation, 1989
Moisture layers with low layer conductivity are characterized by low power dissipation, e.g. 50 mW for the epoxy resin model post insulator under investigation. Under those conditions, no temperature-related dry zones appear, but micro partial discharges (PDs) cannot be excluded.
D. Konig, I. Quint, P. Rosch, B. Bayer
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