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Surge limiters for vacuum circuit breakers
IEEE Transactions on Industry Applications, 1988Computer modeling was used to confirm the applications which require surge protection and to verify that surge limiters installed within the switchgear will provide this protection. The basic phenomena which cause vacuum-switchgear-related surges are reviewed, and the need for surge limiters is discussed.
S.H. Telander, M.R. Wilhelm, K.B. Stump
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Medium voltage DC vacuum circuit breaker
2015 3rd International Conference on Electric Power Equipment – Switching Technology (ICEPE-ST), 2015The increased use of directed current (DC) as an enabler for the integration of renewable sources gains rising interest also for power transmission and distribution networks. Some preliminary installations showed some benefit of this technique compared with alternating current (AC) and pushed the development of switchgear for high (HV) and medium ...
Lars Liljestrand +4 more
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Continuous vacuum monitoring in vacuum circuit breakers
2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2014Vacuum presence monitoring is a routine maintenance procedure carried out on vacuum circuit breakers, in which the CB is isolated from the electrical network. The presence of the vacuum is verified by applying a voltage across the open contacts of the vacuum interrupters VI's higher than the breakdown voltage of such contacts in air. This procedure has
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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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Vacuum circuit breakers in cable networks
22nd International Conference and Exhibition on Electricity Distribution (CIRED 2013), 2013The impact of switching over-voltages in a public distribution network on cable ageing and the occurrence of earth fault failure are discussed. It is concluded that 95% of the network remains unaffected by the behaviour of the VCB, and that switching over-voltages in the remaining connected Industrial sites don't propagate into the public network ...
H. Schellekens, I. Shulepov, J. Tobias
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1982
The vacuum circuit breaker has fascinated the switchgear designer for many years, primarily because of the great advantages of vacuum interrupters, which are: (a) They are entirely self contained, need no supplies of gases or liquids and emit no flame or gas.
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The vacuum circuit breaker has fascinated the switchgear designer for many years, primarily because of the great advantages of vacuum interrupters, which are: (a) They are entirely self contained, need no supplies of gases or liquids and emit no flame or gas.
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Interruption life of vacuum circuit breakers
Proceedings ISDEIV. 19th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.00CH37041), 2002Over the past few years, there has been an increased interest in the number of short circuit interruptions a vacuum circuit breaker is capable of before excessive wear occurs on the contacts. Several methods have been proposed for recording or extrapolating the interruption life of vacuum circuit breaker contacts and these have resulted in many ...
P.N. Stoving, J.F. Baranowski
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Arc Motion in Vacuum Circuit Breakers
IEEE Transactions on Plasma Science, 1986Arc motion due to self-magnetic fields is investigated theoretically and experimentally. Using an array of four Hall probes 90° apart around a vacuum breaker, we unambiguously determine arc rotation. It is primarily the radio component of magnetic induction that causes this motion.
P. Huhse, H. J. Reinhardt
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General Guidelines for Vacuum Circuit Breaker Application
IEEE Transactions on Industry Applications, 1972Vacuum circuit breakers have been used successfully in a variety of applications, spanning duties from fault interruption to highly repetitive arc-furnace switching. Application guidelines that have resulted from extensive engineering investigations and successful experience in service are described.
D. R. Kurtz, J. H. Simpson
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