Results 181 to 190 of about 247 (244)
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Development of Vacuum Interrupters with High Interrupting Capacity
IEEE Transactions on Power Delivery, 1987Vacuum interrupters, in which axial magnetic field type electrodes and CuCr contact materials are ccnbined, show excellent performance from all points of view. By this combination of electrode and contact material, the arcing phenomenon is scmewhat different from that of existing combinations. We have investigated the arcing and dielectric phenanena in
M. Okawa +5 more
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Reignition current interruption characteristics of the vacuum interrupter
IEEE Transactions on Power Delivery, 1988The high-frequency (70-600 kHz) current-interrupting capability of the vacuum interrupter has been investigated using an LC surge testing circuit. Three parameters were examined: di/dt, (di/dt)/gap, and Q*(di/dt)/gap, where Q is a quantity that represents the amount of residue between contacts at zero reignition current. It was found that Q*(di/dt)/gap
Y. Matsui, T. Yokoyama, E. Umeya
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Interrupting abilities of vacuum interrupters with horseshoe electrode
SPIE Proceedings, 1994In this paper, the high current vacuum arc behavior with horse shoe electrode has been described. These are dynamic vacuum arc distribution, the maximum current density related to the interrupting limit and factors which influences the interrupting limits. Then based on the above analyses, several vacuum interrupters within (phi) 70 mm outside diameter
W. Shang, H. Schellekens
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Interrupting capability of vacuum interrupter by various parameter
2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC), 2012Vacuum interrupter (VI) has been commercially available in medium voltage switching equipment. Recently, the development of the VIs is focused to reduce the size. Thus, it is necessary to a smaller size contact. In this paper, we investigated the interruption behavior in the real VI with two different contact size of the transverse magnetic field (TMF)
Chi-Wuk Gu +4 more
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The self actuating vacuum interrupter (SAVI): A new concept in vacuum interrupter technology
2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2016This paper describes a new approach to the design of Vacuum Interrupters. Presently a Vacuum Interrupter (VI) is a component of electrical switchgear, which relies on an external mechanism to provide the movement of the contacts required for switching operation.
L. T. Falkingham, W. J. Molan
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The vacuum arc and vacuum interruption
Journal of Physics D: Applied Physics, 1989The vacuum arc has been widely studied in recent years. One of the principal reasons for this interest has been the increasing use of the vacuum arc to achieve circuit interruption in electrical distribution systems. This is an expanding application with sales predictions of 300000 units for 1987 and with many millions already in service worldwide ...
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2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2014
Vacuum circuit breakers are extending their applications from low/medium voltage level to high voltage level due to their good properties. Multi-break vacuum circuit breakers are used in special applications because thry have better breaking capability and withstand higher breakdown voltage compared with single-break vacuum circuit breakers.
Liqiong Sun +4 more
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Vacuum circuit breakers are extending their applications from low/medium voltage level to high voltage level due to their good properties. Multi-break vacuum circuit breakers are used in special applications because thry have better breaking capability and withstand higher breakdown voltage compared with single-break vacuum circuit breakers.
Liqiong Sun +4 more
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Long-term vacuum integrity of vacuum interrupters
2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2014Vacuum 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., 2005This 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 +6 more
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