Results 191 to 200 of about 248 (246)

Long-term vacuum integrity of vacuum interrupters

2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2014
Vacuum interrupters (VI's) are the primary switching technology for medium voltage (1–52kV) electrical power systems. The extensive field service of VI's is now raising interest in determining the end of life for these devices, with the primary concern being the loss of vacuum.
E. D. Taylor, A. Lawall, D. Gentsch
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The influence of CuCr25 characteristics on the interruption capability of vacuum interrupters

XXIst International Symposium on Discharges and Electrical Insulation in Vacuum, 2004. Proceedings. ISDEIV., 2005
This paper presents an extended survey on the influence of material characteristics of CuCr2S on the overall performance of Axial Magnetic Field Vacuum Interrupters (VI'S). Three distinct production processes are used to manufacture this material which can be discriminated by the maximum operating temperature; these processes are : solid state ...
M. Devismes, H. Schellekens, P. Picot, S. Olive, A. Henon, J. Ponthenier, M. Boutillier   +6 more
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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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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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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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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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Current interruption in vacuum

1994
The vast majority of power switching devices spend almost all their service life in the closed position, conducting current to a load. Yet the major effort in their design and development is directed to the relatively infrequent occasions when, on command, they interrupt this current, or to the even rarer occasions, when they operate in anger to clear ...
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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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