Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Naoki Asari"'
Autor:
Yo Sasaki, Yoshimitsu Niwa, Akira Daibo, Naoki Asari, Takeshi Yoshida Toshiba, Sakaguchi Wataru
Publikováno v:
IEEJ Transactions on Power and Energy. 141:712-717
In vacuum interrupters, an insulation ability is degraded immediately after high current interruption, because of thermal electrons, metal vapors, and residual plasma. Thermal electrons and metal vapors are produced from the electrode surface, which
Analysis of arc behavior and electrode surface temperature in spiral electrode of vacuum interrupter
Publikováno v:
2022 6th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST).
Autor:
Haruki Ejiri, Ryo Kikuchi, Yoshimitsu Niwa, Junichi Kondo, Yuichi Hirano, Akira Daibo, Yuki Inada, Kunihiko Hidaka, Yo Sasaki, Naoki Asari, Akiko Kumada
Publikováno v:
2020 29th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV).
Neutral atom density in intense-mode vacuum arc just before current zero as a determinant factor for the current interruption success or failure was measured by Shack-Hartmann laser wavefront sensors. The electrode selected in this study was Cu50Cr50
Publikováno v:
2020 29th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV).
Surface flashover is one of the problems in improving insulation performance in gas, liquid and vacuum. It has been regarded that the emission of electrons from the cathode triple junction (CTJ) is a first step of initiating the surface flashover. Th
Publikováno v:
Electronics and Communications in Japan. 104
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 26:1527-1531
Alumina ceramics are often used as vacuum electrical device insulators owing to their excellent properties, high hardness quality, high heat resistivity, and high insulation and low gas desorption properties. As alumina is chemically stable, directly
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 26(1):56-63
Solid insulated switchgear (SIS) has been developed as a substitution for sulfur hexafluoride gas insulated switchgears in the medium voltage class.Its main circuit including a vacuum interrupter is coated with epoxy resin.An embedded electrode was e
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 24:3055-3062
Solid insulated switchgear (SIS) has been developed as a substitution for medium voltage SF6 gas insulated switchgear. Its main circuits including a vacuum interrupter are coated with epoxy resin and a solid/gas insulation system is formed. For furth
Publikováno v:
2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST).
A vacuum interrupter used for high voltage distribution system must have enough insulation strength in air in order not to breakdown along an external surface of a vacuum interrupter. Coating dielectric substances on sealing parts of a vacuum interru
Autor:
Tomoyuki Fujishima, Takahiko Yamashita, Tomohiro Furusato, Naoki Asari, Junichi Sato, Hiroyuki Koreeda, Kazuhisa Iwanaga
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 23:3026-3033
Solid insulated switchgear (SIS) has been developed as a substitution for medium voltage SF6 gas insulated switchgear. Its main circuits including a vacuum interrupter are coated with epoxy resin, therefore, a solid/gas insulation system is formed. F