Results 151 to 160 of about 297 (183)
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The role of vacuum in circuit breaker technology
2012 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2012Based on first installations of electrical energy systems at the second half of the 19th century, apparatus were needed to close and open electrical circuits under load and short-circuit conditions. Looking back to the origin of the development of these apparatus very different media have been used in order to switch electrical currents with the focus ...
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History of vacuum circuit breakers and recent developments in Japan
IEEE Transactions on Dielectrics and Electrical Insulation, 2005Vacuum circuit breakers (VCBs) have been developed and widely applied in Japan to meet the requirements of increasing energy consumption and also in national security of various areas. As a result, for example, a 168 kV two break porcelain type and a 100 kA one break VCB have already appeared in the Japanese market and they are currently being exported
M. Homma +3 more
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Vacuum interrupter for a generator circuit breaker
2013 2nd International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST), 2013Improvements in vacuum interrupters (VI) have led to their increased use in generator circuit breaker (GCB). However, for power applications ≥ 100 MVA, increasing the thermal and short-circuit current rating of a VI is important. This paper discusses the VI design issues on improving the efficiency of its components.
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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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Maintenance-free vacuum circuit-breaker
Second International Conference on the Reliability of Transmission and Distribution Equipment, 1995The introduction of vacuum switchgear represented the first step in the direction of a maintenance-free medium-voltage circuit-breaker. Switching in a vacuum was the first quenching principle to assure constant electrical and dielectric properties throughout the device's entire service life of more than 20 years, involving for example more than 100 ...
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Simulation of reignition processes of vacuum circuit breaker in series
Proceedings of 17th International Symposium on Discharges and Electrical Insulation in Vacuum, 1997The present theoretical study is based on experimental investigations and shows the transient behavior of vacuum tubes in series, in the case of reignition. Neglecting the real physical arc and replacing it by a programmable switch (time controlled), it can be demonstrated, in a preliminary study, that the theoretical studies do confirm the ...
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HYBRID CIRCUIT BREAKER WITH A VACUUM INTERRUPTER
2022VARRIER MAHESH +2 more
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A Contactless Pirani Approach for Vacuum Monitoring in Vacuum Circuit Breakers
IEEE Sensors Journal, 2023Juan F Sevillano, Ian Gilbert
exaly
Interruption characteristics of double-break vacuum circuit breakers
IEEE Transactions on Dielectrics and Electrical Insulation, 2008Satoru Yanabu +2 more
exaly