Mitsubishi Electric Corporation

Makiko Kawada

Takashi Miyamoto

Toru Yamashita

Takao Tsurimoto

Shigeyuki Yamamoto

Yuji Yoshitomo

Kazuki Kubo

Toshie Takeuchi

Eiichi Nagao

Kyoichi Ohtsuka

Tadao Minagawa

Ei Tsuchie

When electric discharging occurs inside a gas insulated apparatus in which sulfur hexafluoride is filled, hydrogen-fluoride gas is generated, which abrades a part formed of glass fiber reinforced plastics included in the apparatus. Previously, resin for preventing the abrasion has been coated on the surface of the part; however, a problem has occurred that the coating film peels off. Organic fiber woven cloth woven using organic fiber such as aramid fiber or the like having hydrogen fluoride resistance and mechanical toughness is wrapped around the surface of glass fiber reinforced plastics, and thermosetting resin is wettably impregnated into weave patterns of the organic fiber woven cloth and then heat cured; thereby, an abrasion-preventing protection layer that does not peel off is formed.

Gas insulated apparatus

In a gas insulated breaking device which accommodates open/close elements including a puffer cylinder which compresses an insulation gas and extinguishes an arc and a contact finger which has a slide contact portion which is brought into slide contact with a slide contact portion of the puffer cylinder in the inside of a vessel in which the insulation gas is sealed, a relatively soft plating film is formed on the slide contact portion of the puffer cylinder, and a relatively hard plating film is formed on the slide contact portion of the contact finger, and the silver plating film of each slide contact portion has an inner layer thereof formed of a soft film and an outer layer thereof which constitutes a surface portion formed of a hard film.

Gas insulated breaking device

Growing community of inventors

Chiyoda-ku, Japan

Makiko Kawada