Results 191 to 200 of about 8,801 (231)

Russian vacuum circuit breakers for electrical networks

Proceedings of 17th International Symposium on Discharges and Electrical Insulation in Vacuum, 2002
Development of vacuum interrupters (VI) and vacuum circuit breakers (VCB) was started in the USSR under the guidance of V. Granovsky in the All-Union Electrotechnical Institute (VEI, 1955-1964) and then continued by his colleagues and scholars in different scientific and industrial establishments.
A.M. Chaly, S.P. Chistjakov, V.I. Rakhovsky, Y.P. Romotchkin   +3 more
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Vacuum circuit breaker with asymmetrical actuator

IEEE/PES Transmission and Distribution Conference and Exhibition, 2003
During the last decades vacuum replaced air, oil and almost SF/sub 6/ as switching medium in medium voltage circuit breakers. Beside the ecological and economic advantages vacuum is a proper solution for all switching applications. The range of applications last from switching of loads, such as transformers, motors to the switching of short circuit ...
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The testing of vacuum generator circuit breakers

IET Conference Publications, 2009
Testing of generator breakers is usually in accordance with the standard IEEE Std. C37.013, to be included in the IEC framework soon.
Smeets, R.P.P., Paske, te, L.H., Kuivenhoven, S., Jäger, J., Anger, N.   +4 more
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Surge Limiters for Vacuum Circuit Breaker Switchgear

IEEE Transactions on Power Delivery, 1987
The use of vacuum circult breakers In motor feeder applications (where motor terminal surge protection is not normally used) may require overvoltage surge protection within the switchgear to properly protect the motors. This need can be fulfilled by surge limiters designed for installation within the switchgear connected to the load side of the vacuum ...
S. H. Telander, M. R. Wilhelm, K. B. Stump   +2 more
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Vacuum Circuit Breakers at Transmission Voltage Level

2021
Previously, there was a general idea that all technologies in developing transmission voltage level vacuum circuit breakers were based on medium voltage vacuum circuit breakers. No essentially new technical features were necessary, while it was only an extrapolation in geometry.
Zhiyuan Liu, Jianhua Wang, Yingsan Geng, Zhenxing Wang   +3 more
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Vacuum Circuit Breaker Fault Diagnosis System

Applied Mechanics and Materials, 2012
Vacuum circuit breaker becomes more and more complicated, integrated, high-speed and intellectualized. To insure vacuum circuit breaker in its good conditions, the function of fault diagnosis gets more important than before in the process of repairing. This paper designed and developed a network fault diagnosis system based on PROFINET and B/S (Browser/
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Vacuum Circuit Breaker Metal-Clad Switchgear

IEEE Transactions on Industry Applications, 1976
This paper presents a review of vacuum circuit breakers and metal-clad switchgear for 15 and 34.5 kV applications. It is concerned primarily with a description of the ratings, design features, and application considerations characteristic of vacuum circuit breakers.
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Post arc breakdown in vacuum circuit breakers

20th International Symposium on Discharges and Electrical Insulation in Vacuum, 2003
The influence of contact out-gassing on late breakdowns has been studied. Results show that strongly delayed breakdowns can occur for conditions corresponding to those of the left hand side of the Paschen curve. Cold gas breakdown delay times are shown to depend directly and precisely on pressure. Delays of up to 100ms are possible.
S.W. Rowe, H. Schellekens
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New solution of a vacuum circuit breaker

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV., 2004
To be able to optimise a vacuum circuit breaker one has to pay attention to: - possible short arcing time to reduce the energy dissipated between contacts; - application of a high speed actuator especially for the highest rated voltages; - concentrate on solution of vacuum chambers and contact design generating axial magnetic field (AMF) and the lowest
A. Dzierzynski, H. Sibilski
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Capacitor bank switching with vacuum circuit breakers

2008 China International Conference on Electricity Distribution, 2008
After interruption of a capacitive current sometimes Non Sustained Disruptive Discharges (NSDDpsilas) are observed when using vacuum circuit breakers. According to network calculations, NSDDpsilas generate significant over-voltage on the terminal of the capacitor bank to earth and across the circuit breaker (CB) terminals. In a full scale experiment at
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