Mitsubishi Denki Kabushiki Kaisha

Tmt & D Corporation

Kiyoshi Inami

Hiroyuki Hama

Hitoshi Sadakuni

Takuya Otsuka

Eiichi Nagao

Yoshinori Shimizu

Hirohide Aoki

Kouichi Oosumi

Takuya Ootsuka

A gas-insulated equipment such as a gas-insulated switchgear provided according to the invention can efficiently improve dielectric strength of an entire electrode system considering electric field distribution of the electrodes and conductors and improving insulation coordination so that miniaturization of the entire device can be achieved. The gas-insulated switchgear includes insulating gas sealed within an earth metal container and an insulating spacer insulating and supporting high-voltage receiving portions. Surfaces of shielding electrodes having a larger diameter than that of high-voltage conductors are covered with thick dielectric coatings, and surfaces of the high-voltage conductors are covered with thin dielectric coatings.

Gas-insulated equipment

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.

Gas-insulated switchgear

Growing community of inventors

Tokyo, Japan

Kiyoshi Inami