Results 151 to 160 of about 560,992 (202)
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IEEE Transactions on Dielectrics and Electrical Insulation, 2012
This paper attempts to address the influence of sugar as a contaminant on outdoor insulation characteristics of insulators in a substation. Strong discharge activity was occurred under relative humidity less than 80% on insulators in a 500 kV substation at south China.
Hongwei Mei +3 more
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This paper attempts to address the influence of sugar as a contaminant on outdoor insulation characteristics of insulators in a substation. Strong discharge activity was occurred under relative humidity less than 80% on insulators in a 500 kV substation at south China.
Hongwei Mei +3 more
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Control of insulator contamination in substations
Journal of the Franklin Institute, 1972Abstract 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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Influence of sugar in contaminant to outdoor insulation characteristics of glass insulator
2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena, 2009This 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 +4 more
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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 +3 more
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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 +3 more
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Flashover voltage of contaminated insulators
Conference Record of the 1988 IEEE International Symposium on Electrical Insulation, 2003Methods 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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DC contamination performance of station insulators
IEEE Transactions on Electrical Insulation, 1988The 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 +3 more
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Application of Insulators in a Contaminated Environment
IEEE Transactions on Power Apparatus and Systems, 1979The 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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Switching Surge Performance of Contaminated Insulators
IEEE Transactions on Power Apparatus and Systems, 1971The "wet contaminant" test method, originally developed for use with alternating voltage, is extended for use with switching surges. In order to evaluate insulators under conditions where dry bands would form, it was found necessary to first energize the contaminated insulators with alternating voltage before applying the surges.
B. Macchiaroli, F. Turner
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Contamination of low-voltage insulation
1976 IEEE International Conference on Electrical Insulation, 1976It 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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New technology to combat with insulator contamination
IEEE/PES Transmission and Distribution Conference and Exhibition, 2003Insulator contamination has been one of the significant subjects in the insulation design of power transmission equipment. The insulator designs and countermeasures against contamination have been studied all over the world, taking both environmental and climatic conditions into consideration. Advanced technology in insulator contamination designs have
K. Takasu, T. Irie
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