Results 251 to 260 of about 20,507 (308)
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Accelerated diagnostics of high-voltage circuit breakers
Russian Electrical Engineering, 2007Diagnostics of high-voltage circuit breakers (HVCBs) is considered on the basis of an analysis of digital records generated by a multichannel digital recorder. A technique of the accelerated control of HVCB characteristics in switching on/off modes without opening the breaker tanks is described.
G. M. Mikheev +3 more
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Flow Behavior in High-Voltage Circuit Breaker
IEEE Transactions on Plasma Science, 2011Since several years, high-voltage circuit breakers (voltages of up to 800 kV) have been studied by the thermal plasma community to attain high level of reliability, good operating economy, and long intervals without maintenance. The studies are also related to gas substitution in order to replace SF6. This feature consists to study, by a numerical tool
Jean-Jacques Gonzalez, Pierre Freton
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Contact Erosion in High Voltage Circuit Breakers
2018 IEEE Electrical Insulation Conference (EIC), 2018During current interruption in the high voltage circuit breaker, the contacts are eroded due to high temperature in the arc zone. This may influence the lifetime of the breaker and even current interruption process. Although there are many parameters that influence contact erosion, the work presented in this paper focuses on the shape of the contact ...
M. T. Dhotre, X. Ye, S. Kotilainen
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Condition monitoring of high voltage circuit breakers
Proceedings of IEEE. AFRICON '96, 2002The advances made in microprocessor-based measuring equipment can be used to good effect to determine the condition of a circuit breaker. In essence a very effective condition monitoring tool is represented by a number of products that are now commercially available.
M.H.B. de Grijp +3 more
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Arc Energy in High Voltage Circuit Breakers
Arabian Journal for Science and Engineering, 2012This work is devoted to the study of the energy balance at the opening of an SF6 circuit breaker. A new model is proposed to simulate the thermal exchanges involved around the current zero as a function of time. The theoretical basis of this model consists of the coupling of the electric and thermal equations of the arc plasma, which takes into account
A. Ziani, H. Moulai
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High voltage oil circuit breakers
Electrical Engineering, 1932MECHANICAL maintenance of high voltage circuit breakers is of considerable importance to the successful operation of power systems. Experience obtained over a number of years has proved that in many ways existing equipment may be modernized and betterments provided by the operating engineer.
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Condition monitoring of high voltage circuit breakers
2022This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
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Worldwide Reliability Survey of High-Voltage Circuit Breakers
IEEE Industry Applications Magazine, 1995CIGRE 13.06 Working Group has conducted two worldwide reliability surveys of the reliability of high-voltage circuit breakers of 63 kV and above. The first enquiry included 78000 breaker-years of "in-service data" from 102 companies in 22 countries during the years 1974 through 1977 and included all interrupting technologies.
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Development of High Voltage Vacuum Circuit Breakers in China
2006 International Symposium on Discharges and Electrical Insulation in Vacuum, 2006This paper introduces research work on the development of high-voltage (HV) vacuum circuit breakers (VCBs) in China from its starting point in 1989 to 2006. In this period, a 126-kV two-breaks VCB prototype and a 126-kV single-break VCB prototype were developed. A latest 252-kV single-break interrupter prototype is introduced. Five HV VCBs technologies
Zhiyuan Liu +7 more
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Comparison of Synthetic Test Circuits for Ultra-High-Voltage Circuit Breakers
IEEE Power Engineering Review, 1996Three synthetic test circuits to verify the interrupting performance of UHV circuit breakers (765kV, 63kA, 50Hz) are compared on aspects of equivalence, operation, required capacitive energy and applicability. The comparisons show that, although each circuit has its own merits, the EPIC circuit appears to be very attractive.
B.L. Sheng, L. van der Sluis
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