Results 211 to 220 of about 345 (261)

Interrupting Capacity of Vacuum Interrupters as a Function of Contact Geometry

IEEE Transactions on Components, Hybrids, and Manufacturing Technology, 1985
Systematic investigations of the interrupting capacity of vacuum circuit breakers with different contact shapes and sizes are reported. For various electrode geometries with current-dependent selfgenerated transverse and axial magnetic fields, the breaking current limit was determined.
F.-W. Behrens, A. Erk
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The Vacuum Interrupter Contact

IEEE Transactions on Components, Hybrids, and Manufacturing Technology, 1984
A survey of developments in electric contact design for vacuum interrupters is presented. The major emphasis is placed upon those characteristics of contact design that have led to practical vacuum interrupters. A brief description is given of the different modes of vacuum arc that have been observed and how these modes occur during one-half cycle of ...
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Distribution of electric field in vacuum interrupter during interrupting

Proceedings ISDEIV. 19th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.00CH37041), 2002
The electric field distribution in a high-voltage vacuum interrupter is calculated and analyzed with the finite-element method. In the calculation, the potential on the electrodes is set asymmetric and the voltage on the floating shield is unknown. The influence of plasma conductivity and charges on electrode surface is also considered.
null Wang Zhongyi, null Wang Jimei
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Particle detection in vacuum interrupter after current interruption

2013 19th IEEE Pulsed Power Conference (PPC), 2013
After high current interruption in vacuum interrupter, the electrode temperature rises because of the current heat process, and the surface becomes rough due to the arc burn on electrodes. In this paper, random discharge after current zero is reported, and conducting particle is considered to be responsible for the phenomenon.
Shuo Xu, Kunihiko Hidaka, Akiko Kumada, Hisatoshi Ikeda, Eiji Kaneko   +4 more
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Deionisation of an interrupted vacuum arc

Proceedings of the Institution of Electrical Engineers, 1977
Measurements have been made of time-dependent saturation ion currents flowing to a probe and to the discharge electrodes following the forced extinction of high-current (1–5 kA) vacuum arcs of short duration (≃1 ms) on copper electrodes.The results have been utilised to derive ion-flux distributions irrespective of ion-charge number, assuming ...
G.J. Bauer, R. Holmes
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Post-arc current measurement and interruption performance of vacuum interrupter in DC interruption

Journal of Physics D: Applied Physics, 2022
Abstract In the DC grid, fault current rises very fast due to low impedance. Fast DC circuit breakers are needed to isolate faults and avoid a collapse of the common DC grid voltage. Based on the forced current zero (CZ) technology, the vacuum interrupter (VI) equipped with fast electromagnetic repulsion mechanism is a very promising ...
Qiang Tang, Shenli Jia, Zongqian Shi, Yongpeng Mo   +3 more
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Challenges For Vacuum Interrupter Design

2006 International Symposium on Discharges and Electrical Insulation in Vacuum, 2006
Vacuum interrupters form the key component of a medium voltage (MV) vacuum switchgear design. Vacuum interrupter technology is now well established and key manufacturers across the world are routinely producing interrupters for ratings up to 52kVrms. Manufacturers have focused on reducing the cost of interrupter components by adapting to more efficient
R. Parashar, A. Baker, A. Sitzia
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Electrical Life of Vacuum Interrupters

2006 International Symposium on Discharges and Electrical Insulation in Vacuum, 2006
The breaking of currents from a couple of amperes to several tens of kilo-amperes is a main function of medium voltage circuit breakers. Vacuum has become the leading technology in this field with attributes such as high reliability and superior electrical endurance.
M. Schlaug, L. Dalmazio, U. Ernst, X. Godechot   +3 more
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Developmenbt of Power Vacuum Interrupters

Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1962
The practicality of using vacuum interrupters for switchgear applications has been demonstrated by the successful development of a number of prototype devices. Interrupting tests have been made at currents up to 43,000 amp (amperes) at 15.5 kv and recovery rates up to 6,000 volts/?sec (per microsecoind).
T. H. Lee, Allan Greenwood, D. W. Crouch, C. Elho Titus   +3 more
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Review of vacuum interrupter development carried out in London by Vacuum Interrupters Limited

29th Annual Weekend Meeting History of Electrical Engineering, 2001
Vacuum Interrupters Limited was founded in 1968. This was a joint venture originally between GEC which inherited the work carried out by English Electric and AEI, together with Reyrolle- Parsons, and later including Hawker-Sidderly (Brush). This paper concentrates briefly on some of the innovative technology developed during the period from 1968-92 ...
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