Tmt & D Corporation

Takuya Ootsuka

Hiroyuki Hama

Yoshinori Shimizu

Hirohide Aoki

Kiyoshi Inami

Kouichi Oosumi

A compact and economical gas-insulated switchgear is provided. The gas-insulated switchgear includes: a grounding metal housing filled with insulating gas, and in which the disconnector part having a moving side electrode part and a stationary side electrode part is accommodated; and composite insulating shields integrally formed into one metal-dielectric member in which surface of a high electric field part located in the vicinity of ends of openings is coated with a dielectric so as to cover the moving side and stationary side electrode parts and with the dielectric. To form the composite insulating shields , a metal shield of less than 0.6 in non-uniform constant before coating with the dielectric is coated with dielectrics having a thickness of not more than approximately 30% of an inter-electrode distance from a facing electric-field relaxation shield.

Growing community of inventors

Tokyo, Japan

Takuya Ootsuka