Results 201 to 210 of about 247 (244)
Some of the next articles are maybe not open access.
Review of vacuum interrupter development carried out in London by Vacuum Interrupters Limited
29th Annual Weekend Meeting History of Electrical Engineering, 2001Vacuum 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 ...
openaire +1 more source
Useful Life of Vacuum Interrupters
IEEE Transactions on Power Apparatus and Systems, 1978A 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
openaire +1 more source
Interrupting capacity of vacuum interrupters depending on the frequency of current
IEEE Transactions on Plasma Science, 1993Results 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 ...
openaire +1 more source
Current interruption in vacuum
1994The 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 ...
openaire +1 more source
Dynamic insulation in vacuum interrupters
SPIE Proceedings, 1994Breaking 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
openaire +1 more source
Bouncing phenomena of vacuum interrupters
24th ISDEIV 2010, 2010Bouncing 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
openaire +1 more source
On the prevention of restrikes of vacuum interrupters
Russian Electrical Engineering, 2011In 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 +2 more
openaire +1 more source
V-t characteristics of vacuum interrupter after large current interruption
24th ISDEIV 2010, 2010Because of the contact material's evaporation and ejection of some metal particles out of the contact gap during the flow of the vacuum arc, the contact surface may exhibit some erosion after each operation of vacuum circuit breakers. In this study, the insulation properties were investigated for vacuum interrupters with the rated voltage about 10 kV ...
S. Sato +5 more
openaire +1 more source
2007
The invention relates to a vacuum interrupter chamber having an insulating ceramic wall, within which contact pieces which move in a vacuum are arranged and are surrounded by a screen between the contact piece and the interrupter chamber wall, according to the preamble of patent claim 1.
ABB TECHNOLOGY AG +3 more
openaire +1 more source
The invention relates to a vacuum interrupter chamber having an insulating ceramic wall, within which contact pieces which move in a vacuum are arranged and are surrounded by a screen between the contact piece and the interrupter chamber wall, according to the preamble of patent claim 1.
ABB TECHNOLOGY AG +3 more
openaire +1 more source
The intrinsic limits of vacuum interruption
2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum, 2008The role of particles, metal vapour, gas and molten electrode surfaces are discussed in relation to post arc failure of vacuum circuit breakers. A new full PIC-Monte-Carlo simulation model is descried and the numerous physical mechanisms which are included in it are illustrated.
openaire +1 more source