Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Osamu Kisanuki

Hitoshi Sadakuni

Manabu Yoshimura

Takao Tsurimoto

Yoshinori Shimizu

Takuya Otsuka

Keiichiro Nakamura

Masanori Osumi

Katsuhiko Nakamura

Hitoshi Taniguchi

Yukinori Koike

Yuki Hyodo

Kiyoshi Sonoda

Naochika Yamamoto

Takashi Miyamoto

Shinichiro Nakauchi

Masato Kawahigashi

Shogo Kobayashi

Masahito Tanaka

Tsuyoshi Mori

Yosuke Kuruma

A switchgear includes: a tank having a first through hole; a fixed contact in the tank; a movable contact capable of reciprocating between a position in contact with the fixed contact and a position separated from the fixed contact; and an operating rod capable of reciprocating in a direction parallel to the direction of movement of the movable contact, and penetrating through the first through hole. The switchgear further includes: a connecting plate connecting the movable contact and the operating rod; a shielding plate disposed closer to the fixed contact than the connecting plate, having a second through hole through which the operating rod penetrates and a third through hole through which the movable contact is capable of passing formed therein; a first bearing disposed in the first through hole to support the operating rod; and a second bearing disposed in the second through hole to support the operating rod.

Switchgear

An operating device for a disconnector includes a drive unit, a Geneva mechanism, and a wire. The drive unit includes a forwardly and reversely rotatable motor serving as a drive source for driving a movable contactor of the disconnector, a power source supplying power to the motor, and a first pulley connected to a rotary shaft of the motor, and is disposed apart from the disconnector. The Geneva mechanism includes a second pulley that rotates in the same direction as the first pulley with the rotation of the first pulley, and a driven wheel that is intermittently driven while the second pulley rotates and that is provided with a rotary shaft connected to the movable contactor, and is attached to the disconnector apart from the drive unit. Further, as a flexible rotational force transmission member, a wire is stretched between the second pulley and the first pulley.

Gas insulated switching apparatus and switch

A gas insulated switchgear includes: a center conductor that is arranged to extend horizontally in a tank; a cylindrical member that is arranged in the tank to surround a center conductor, and formed by curving a metal plate-like member into a cylindrical shape and then joining circumferentially opposed both ends of the plate-like member by welding to form a welding portion, the welding portion being located on a lower side of the cylindrical member; and a current transformer for instruments, through which the cylindrical member is inserted, the current transformer being supported by the cylindrical member, and being arranged to surround the center conductor. The welding portion includes a metal spacer sandwiched between the circumferentially opposed both ends of the plate-like member, and the spacer and the ends are welded to each other.

Gas insulated switchgear

A gas insulated switchgear is configured including phase-A, phase-B, and phase-C breaker units. For example, the phase-A breaker unit includes breakers connected in series in a horizontal first direction, disconnectors annexed on the breaker, disconnectors annexed on a breaker, and disconnectors annexed on a breaker. The disconnector is connected to a main bus that extends in the first direction, and the disconnector is connected to a main bus that extends in the first direction. Each of the disconnectors on the breakers is arranged while a longitudinal direction thereof is set to a second direction orthogonal to the first direction so that a switching direction of the disconnector is equal to the second direction. Thereby, the length of the main buses can be shortened, and an interphase distance and a breaker-to-breaker distance can be reduced.

In a gas-insulated power apparatus in which contiguous vessels(GIBC, GIBC) are coupled by way of flangesof respectives thereof, and power conductors(GIBC) insulated from the vessels by an insulating gasare included in the vessels, by squeezing the flangeof the vessel on one side to be coupled by a pressing memberscrewed to the flangeof the vessel on other side and the flangeof the vessel on other side, positions of the vessel on one side and the vessel on other side coupled as described above relative to each other can be shifted in a peripheral direction of the flange, and therefore, even when a direction of leading out a gas-insulated bus or the like becomes various depending on products, various directions can be dealt with out depending only on design of respective product specifications.

Gas-insulated power apparatus

It is an object to provide gas-insulated switchgear that occupies less installation space, in which the number of bellows to be used can be reduced, and that can minimize a work range in disassembling at addition or accident, and in reassembling. In double-bus gas-insulated switchgear in which a bus-side device is arranged above a breaker to reduce installation space to be occupied, a bellows is arranged between bus-side devices arranged vertically to each other, and under a support frame of the breaker, another support frame that can be separated therefrom is arranged, thereby enabling disassembling of a lower bus-side device alone.

Gas-insulated switchgear

A gas-insulated switchgear apparatus includes a center conductor, a current transformersurrounding the center conductor, an electric field shield, and a metallic vessel. The electric field shieldis located between the center conductorand the current transformerand surrounds the center conductor. The current transformerand the electric field shieldconstitute a tubular part that outputs a signal representing an electric physical quantity. The metallic vesselis filled with an insulating gas. The tubular part has an openingformed therein. In a posture in which the center axis of the tubular part about which the tubular part surrounds the center conductoris substantially horizontal, the openingis located in a surface of the tubular part, which surface is included in a lower portion of the tubular part and faces the center conductor

Gas-insulated switchgear apparatus

A fluid-insulated electrical apparatus includes a grounded tank which is an airtight metal vessel filled with an insulating fluid. A conductor to which a high voltage is applied is disposed in the grounded tank. A metal plate that is press-processed to have an inclined portion and a groove between adjacent head top portions is fixed to and electrically connected to an inner wall of the grounded tank.

Fluid-insulated electrical apparatus

[Object] A compact gas-insulated switching apparatus in which the space for arranging a gas breaker module may be reduced, and the space for arranging a circuit wiring may be reduced in the vertical direction is proposed. [Means for Resolution] Gas circuit breakers for respective phases of a breaker module have the reference axial lengths having the same length between the first and second vertical planes and arranged so as to extend in the first direction, first circuit wirings for the respective phases of a first circuit wiring module are configured with gas-insulated buses respectively and are extended in parallel to each other along the second direction which is orthogonal to the first direction, the first circuit wirings for the respective phases are positioned at the respective apexes of a right angled isosceles triangle, the first circuit wirings respectively for the phase A and the phase B are positioned at both ends of the short side of the right angled isosceles triangle and are arranged on a third vertical plane positioned between the first vertical plane and the second vertical plane so as to extend in parallel thereto.

Gas-insulated switching apparatus

A gas-insulated switchgear includes an electric conductor that is housed in a vessel that is sealed and filled with insulating gas, a current transformer that is housed in the vessel, which includes a coil wound around the electric conductor, an electric-field relaxing shield that is arranged in the vessel at a radially inward position relative to an inner side of the coil, and a dielectric insulating member that is arranged on an end portion of the electric-field relaxing shield.

Growing community of inventors

Tokyo, Japan

Osamu Kisanuki