Results 251 to 260 of about 4,358 (304)

Insulator surface contamination

Electrical Engineering, 1948
ONE OF THE major unsolved problems in the insulation of electric power lines is that of obtaining trouble-free operation under conditions of severe atmospheric contamination. The presence of conducting film on the surface of outdoor insulators subjected to high voltage leads to a number of serious results. This may be summarized briefly as follows:
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Influence of sugar in contaminant to outdoor insulation characteristics of glass insulator

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena, 2009
This paper describes the influence of sugar in contaminant to outdoor insulation characteristics of glass insulator. First of all, field tests were carried out to analyze the pollution layer condition of discharged glass insulators. Then the differences of surface resistance, leakage current and flashover voltage of glass insulators between the ...
Hongwei Mei, Yingke Mao, Liming Wang, Jianchao Zheng, Zhicheng Guan   +4 more
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Influence of nonsoluble contaminants on the flashover voltages of artificially contaminated insulators

IEEE Transactions on Power Delivery, 1996
This paper describes the results of investigation into the influence of a kind of nonsoluble contaminant (Tonoko or Kaolin) on flashover voltages of artificially contaminated insulators. The deposit density of Kaolin on the insulator surface is less than that of Tonoko when contaminated with the suspension containing the same amount of Tonoko or Kaolin.
R. Matsuoka, K. Kondo, K. Naito, M. Ishii   +3 more
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Contamination of HVDC insulators

2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES), 2016
The Relatively failure rate of HVDC line insulators is 10–25 times higher than in corresponding AC lines. The main reason for this are surface erosion, ion migration and voltage distribution. A special samples preparation technique was used for conducting ageing tests.
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Flashover voltage of contaminated insulators

Conference Record of the 1988 IEEE International Symposium on Electrical Insulation, 2003
Methods have been developed for the calculation of flashover voltage of contaminated circular strip models and outdoor insulators of practical but simple geometric shape. The criteria for discharge elongation and the assumptions made are examined. A typical flow diagram of the programs for evaluating the critical values using the equations derived is ...
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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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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.
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DC contamination performance of station insulators

IEEE Transactions on Electrical Insulation, 1988
The authors describe the results of an investigation of the contamination performance of equipment insulators under the application of a DC voltage. Artificial contamination tests on insulators with various shed profiles were carried out. In addition to total leakage distance, shed profile is found to play a role in determining the DC withstand voltage.
K. Naito, S. Kunieda, Y. Hasegawa, S. Ito   +3 more
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Application of Insulators in a Contaminated Environment

IEEE Transactions on Power Apparatus and Systems, 1979
The application and maintenance of outdoor ceramic insulation on overhead transmission systems has been an art learned by experience. This document combines the experiences of electric utilities, manufacturers, and research laboratories into a single comprehensive report on the design and maintenance of transmission insulation in a contaminated ...
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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.
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