Results 151 to 160 of about 884 (177)
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Intrinsic-like surface flashover voltage of insulators
IEEE Transactions on Dielectrics and Electrical Insulation, 2015The parameter for indicating the characteristics of the surface flashover voltage in vacuum is studied. Experiment results show that, compared with another conditioning method, the flashover voltages of ablative materials obtained by the multi-round stepped increasing voltage method (termed MRSIVM) are increased by 100-200%.
Jie Cheng +7 more
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Research on flashover voltage of nylon in SF6 under high-voltage pulse
Journal of Electrostatics, 2019Abstract Flashover on the surface of dielectric failure in compact accelerators can cause equipment to malfunction and threaten personal safety during high-power microwave (HPM) applications. In this study, flashover of nylon in SF6 was induced by a high-voltage pulse that was generated by a pulse formed network (PFN) with the duration of dozens of ...
Xiaoliang Yang +5 more
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Calculation of flashover voltage of polluted insulators under DC and AC voltages
Proceedings., Second International Conference on Properties and Applications of Dielectric Materials, 2003The flashover processes of polluted insulators under both DC and AC voltages were observed with a high-speed camera. Physical and mathematical models to describe the DC and AC flashover are proposed. A formula expressing the resistance of the remainder pollution layer of a polluted insulator is derived.
Z. Guan, R. Zhang
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Using Corrected Criteria to Model Flashover Voltage of Polluted Insulators
2006 IEEE International Power and Energy Conference, 2006In this paper, a dynamic model to calculate the flashover voltage of polluted insulators is presented. This paper focuses mainly on two points: The criterion of arc propagation and the arc length in which the flashover occurs. For first point, the typical criteria of arc propagation are not regarded but also the main criterion of arc propagation is ...
Iman Ziari +2 more
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Flashover Voltage over Ceramics in High Vacuum
Japanese Journal of Applied Physics, 1974Changes of flashover voltage over various ceramics were investigated in high vacuum with repeatedly applied DC and impulse voltages. It was found that the flashover voltage vs the number of repeated stressing curve showed a peak. The increase in the flashover voltage might be attributed to degassing of the surface of the ceramics, and the decrease ...
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Modified cuckoo search algorithm and the prediction of flashover voltage of insulators
Neural Computing and Applications, 2017A novel modified cuckoo search (MCS) algorithm is proposed to enhance the performance of cuckoo search. In this MCS algorithm, an enhancing exploration strategy is adopted to extend the search region. At the same time, the control parameters of step size and discovery probability are adjusted adaptively according to the improvement rate of the ...
Jiatang Cheng, Lei Wang 0030, Yan Xiong
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Electrical Engineering in Japan, 1993
AbstractIt has been reported that the flashover voltage of gaseous dielectrics may increase greatly when they are mixed with carbon‐halide mist. However, the factors which bring about the increase of the flashover voltage still are not clarified fully. Based on the study on the basic flashover characteristics of vapor‐mist dielectrics, the authors have
Masafumi Yashima +2 more
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AbstractIt has been reported that the flashover voltage of gaseous dielectrics may increase greatly when they are mixed with carbon‐halide mist. However, the factors which bring about the increase of the flashover voltage still are not clarified fully. Based on the study on the basic flashover characteristics of vapor‐mist dielectrics, the authors have
Masafumi Yashima +2 more
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European Transactions on Electrical Power, 1991
AbstractThe paper deals with the determination of critical flashover voltage and standard deviation from flashover probability data. A new and simple algorithm is suggested for the analysis of flashover data. In this algorithm the critical flashover voltage and standard deviation of the flashover of a given insulation are determined by interpolation of
O. E. Gouda, A. G. Zeitoun, E. A. Eisawy
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AbstractThe paper deals with the determination of critical flashover voltage and standard deviation from flashover probability data. A new and simple algorithm is suggested for the analysis of flashover data. In this algorithm the critical flashover voltage and standard deviation of the flashover of a given insulation are determined by interpolation of
O. E. Gouda, A. G. Zeitoun, E. A. Eisawy
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Flashover voltage of high-voltage insulators with uniform surface-pollution films
Proceedings of the Institution of Electrical Engineers, 1969Contamination on the surface of high-voltage outdoor insulators can lead to the formation of quasistable gas discharges, which burn in series with the resistive contaminative film. Under certain conditions, these discharges may grow to cause a complete flashover. In this paper, a model for the case of a discharge burning on a rectangular polluted strip
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