Results 261 to 270 of about 2,183 (305)

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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Interrupting capacity of vacuum interrupters depending on the frequency of current

IEEE Transactions on Plasma Science, 1993
Results of arc reignition voltages during current interruption of frequencies from 5.9 to 60 kHz by a short vacuum gap are presented. Measured arc reignition voltages depend on current amplitude and frequency, the values of preliminary arc current at the moment of switching on the HF current, and the discharge mode in the preceding current semiwave ...
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Useful Life of Vacuum Interrupters

IEEE Transactions on Power Apparatus and Systems, 1978
A vacuum interrupter may not be called upon to function to interrupt fault current for relatively lengthy periods of time. In the stand-by mode and carrying rated continuous current, some parts of the interrupter may reach temperatures substantially above ambient.
M. E. Arthur, M. J. Zunick
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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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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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Dynamic insulation in vacuum interrupters

SPIE Proceedings, 1994
Breaking capacity of vacuum circuit breakers is limited by dynamic voltage withstanding of their vacuum interrupters in a sense. Dynamic insulation in a vacuum interrupter can be represented externally by their dielectric recovery behavior and the stability of voltage withstanding.
Jiyan Zou, Junjia He, Li-chun Cheng
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Bouncing phenomena of vacuum interrupters

24th ISDEIV 2010, 2010
Bouncing is a phenomenon often observed during circuit-breakers operation. The effect occurs at the moment, when the interrupter contacts touch during closing. For vacuum interrupters, bouncing is caused by the oscillatory motion of the movable vacuum interrupter stem in conjunction with the associated contact springs. The dependencies between involved
Edgar Dullni, Sean-Feng Zhao
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On the prevention of restrikes of vacuum interrupters

Russian Electrical Engineering, 2011
In this paper, the authors show the necessity of using vacuum interrupters connected in series at the pole of vacuum circuit breakers designed for a voltage of 110 kV and above to reduce the probability of restrikes up to the values required by the corresponding standard for class C1 and C2 circuit breakers.
A. A. Pertsev, A. N. Panibratets, L. A. Ryl’skaya   +2 more
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