Results 141 to 150 of about 884 (177)
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Minimum Flashover Voltage of Iced Insulators
IEEE Transactions on Electrical Insulation, 1983Experimental studies were performed in a 4.8×2.8×3.5 m3 cold room with a HV transformer of 124 kVA, 120 kV. Atmospheric ice was accreted on a vertical string of three types of insulators: a classic glass insulator and two long-rod synthetic insulators. The results obtained show that flashover occurs at the lowest voltage with hard rime formed at -12°C ...
L. C. Phan, H. Matsuo
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A Study of High-Voltage Flashovers
Transactions of the American Institute of Electrical Engineers, 1929A brief discussion is given of the various forms of electrical discharges as they are characterized by the physicists. Oscillographic records secured of voltages and currents, both before and during the flashovers, are reproduced and discussed. Polarity tests are described in which the electrode shape and spacing were found to determine the sign of the
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DC Flashover Voltage Characteristics of Contaminated Insulatirs
IEEE Transactions on Electrical Insulation, 1981An investigation was made of the influence of the dc power source on the withstand voltage ofntam-contaminated insulators. A thyristor-controlled power source was found stiff enough for the tests. DC contamination tests on various insulators were also carried out. The dc withstand voltage is generally lower than the ac one (rms).
T. Fujimura, K. Naito, Y. Suzuki
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Calculation of Impulse Flashover Voltage of a Water Column
IEEE Transactions on Electrical Insulation, 1986The impulse flashover voltage of a water colume has been calculated using numerical techniques, while considering the constriction of the water column and the dynamic behavior of the discharge propagating along a water surface. The computed values have been compared with the experimental results obtained under 1/5, 1/50, 1/500, 1/5000, 1/50000 impulse ...
A. Rumeli, M. Hizal
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Effect of area on surface flashover voltage in vacuum
IEEE Transactions on Electrical Insulation, 1988It is known that the breakdown voltage in a vacuum insulation system drops with an increase in linear dimension of electrodes and with an increase in the number of insulating spacers bridging the gap. Normally this is explained to be the result of the increase in the number of so-called weak links in the system. The influence of an external capacitance
J.D. Cross, B. Mazurek
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Polluted insulator flashover model for ac voltage
IEEE Transactions on Dielectrics and Electrical Insulation, 1995Considerable theoretical and experimental research on polluted insulators has yet to yield a perfect generalized mathematical model which can predict accurately critical flashover voltages and currents. In this paper an ac model has been proposed especially applicable to static arcs.
P.S. Ghosh, N. Chatterjee
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Effect of altitude on the flashover voltage of contaminated insulators
Proceedings of Conference on Electrical Insulation and Dielectric Phenomena - CEIDP '96, 2002Contamination flashover of insulators depends not only on the severity and type of contamination, but also on the altitude at which these insulators are situated. Reduced pressure or air density combined with light contamination at high altitudes decreases the flashover voltage. Experimental testing of a number of insulators for a wide range of outdoor
R. Sundararajan, R.W. Nowlin
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Experiment of laser-triggered flashover in pulsed voltage
2009 IEEE Pulsed Power Conference, 2009With the aim of studying the characteristics of laser-triggered surface flashover in pulsed voltage, synchronization problem of laser pulse and voltage pulse is solved through a high precision trigger system. The experimental platform of laser-triggered surface flashover in pulsed voltage is built up in the laboratory.
null Pan Ru-zheng +7 more
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Flashover prevention of high voltage piezoelectric transformers
2009 IEEE Pulsed Power Conference, 2009Piezoelectric transformers are used as step-up voltage elements in many devices [1, 2]. The University of Missouri is developing a piezoelectric transformer as an accelerator for an ion beam [3]. In cases where high voltage pulses are desired, discharges can result from a large electric field near triple point junctions [4, 5].
Andrew Benwell +4 more
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Flashover Voltage Characteristics of Segmented Diverter Strips
SAE Technical Paper Series, 1999<div class="section abstract"><div class="htmlview paragraph">The flashover voltage characteristics of different types of segmented diverter strips were determined. Especially the resistive layer on the rear side of the strip, which protect the strip from electrostatic discharges, has a major influence on the flashover characteristics.
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