Abstract: A power conversion device includes a base, a first stage, a first support portion, and a support member. At least one first power conversion unit is mounted on the first stage. The first support portion extends in a normal direction of the base and is fixed to the base and the first stage. The support member includes a first panel and a second panel. The first panel and the second panel are disposed on the base to support the first stage in the Z-axis direction. The first panel and the second panel are integrally formed to intersect with each other.

Abstract: A power conversion device includes a base, a first stage, a first support portion, and a support member. At least one first power conversion unit is mounted on the first stage. The first support portion extends in a normal direction of the base and is fixed to the base and the first stage. The support member includes a first panel and a second panel. The first panel and the second panel are disposed on the base to support the first stage in the Z-axis direction. The first panel and the second panel are integrally formed to intersect with each other.

Abstract: A power conversion device includes a first stage, a second stage, a first electric field relaxation shield unit, a second electric field relaxation shield unit, and a plurality of stage posts. The first electric field relaxation shield unit is arranged to surround outer periphery of the first stage. The second electric field relaxation shield unit is arranged to surround outer periphery of the second stage. The plurality of stage posts connect the first stage and the second stage. The plurality of stage posts have outer peripheral surfaces formed of insulating bodies. Power conversion units loaded on the first stage are arranged inside a columnar region which includes at least some of the plurality of stage posts as sides.

Abstract: A power conversion device includes a first stage, a second stage, a first electric field relaxation shield unit, a second electric field relaxation shield unit, and a plurality of stage posts. The first electric field relaxation shield unit is arranged to surround outer periphery of the first stage. The second electric field relaxation shield unit is arranged to surround outer periphery of the second stage. The plurality of stage posts connect the first stage and the second stage. The plurality of stage posts have outer peripheral surfaces formed of insulating bodies. Power conversion units loaded on the first stage are arranged inside a columnar region which includes at least some of the plurality of stage posts as sides.

Abstract: A gas electrical apparatus includes: a container filled with insulating gas; a high voltage conductor arranged inside the container and applied with a prescribed voltage; and an insulating support member configured to insulate and support the high voltage conductor relative to the container. The high voltage conductor is covered by a first dielectric film. The first dielectric film includes a through hole extending from the first main surface to the second main surface. The through hole has an inner circumferential surface on which a first coating film is formed such that at least a hole diameter of the through hole is less than a diameter of an electron avalanche in a state where a gas insulated electrical apparatus is used.

Abstract: A switchgear includes a first contact capable of reciprocating along a motion axis, and a second contact. The second contact includes a facing unit movable in a first direction from the first contact toward the second contact when the facing unit is pushed in by the first contact, a spaced unit spaced from the axis and urged in a direction toward the axis, and a regulating unit coupled to the facing unit. The spaced unit abuts on the regulating unit to restrict movement of the spaced unit in the direction toward the axis as the facing unit is located in the second direction. The spaced unit is released from abutment on the regulating unit to move in the direction toward the axis into abutment on the first contact as the facing unit moves in the first direction.

Abstract: A gas-insulated electrical device includes a covering film covering an inner surface of a ground tank filled with an insulation gas. The covering film is formed of an insulation dielectric covering film that becomes more positively charged than metals in a triboelectric series, and becomes positively charged upon contact with metal foreign matter. At the same time, the metal foreign matter becomes negatively charged upon contact with the covering film. In a case where the high-voltage conductor is charged to a negative polarity, a Coulomb's force acts on the metal foreign matter in contact with the covering film in a direction away from the high-voltage conductor. The metal foreign matter in the ground tank is thus suppressed from floating.

Abstract: A switchgear includes a first contact capable of reciprocating along a motion axis, and a second contact. The second contact includes a facing unit movable in a first direction from the first contact toward the second contact when the facing unit is pushed in by the first contact, a spaced unit spaced from the axis and urged in a direction toward the axis, and a regulating unit coupled to the facing unit. The spaced unit abuts on the regulating unit to restrict movement of the spaced unit in the direction toward the axis as the facing unit is located in the second direction. The spaced unit is released from abutment on the regulating unit to move in the direction toward the axis into abutment on the first contact as the facing unit moves in the first direction.

Abstract: A gas electrical apparatus includes: a container filled with insulating gas; a high voltage conductor arranged inside the container and applied with a prescribed voltage; and an insulating support member configured to insulate and support the high voltage conductor relative to the container. The high voltage conductor is covered by a first dielectric film. The first dielectric film includes a through hole extending from the first main surface to the second main surface. The through hole has an inner circumferential surface on which a first coating film is formed such that at least a hole diameter of the through hole is less than a diameter of an electron avalanche in a state where a gas insulated electrical apparatus is used.

Abstract: Gas insulated electrical equipment includes: a metal enclosure having an insulating gas introduced therein; a conductor that is accommodated inside the metal enclosure and to which voltage is applied; and an insulating and supporting member insulating and supporting the conductor relative to the metal enclosure. The conductor is circumferentially covered with a dielectric film, and furthermore, a nonlinear resistance film provided on the dielectric film and having a nonlinear volume resistivity decreasing when the nonlinear resistance film is acted on by an electric field higher than a critical value.

Abstract: A gas-insulated electrical device includes a covering film covering an inner surface of a ground tank filled with an insulation gas. The covering film is formed of an insulation dielectric covering film that becomes more positively charged than metals in a triboelectric series, and becomes positively charged upon contact with metal foreign matter. At the same time, the metal foreign matter becomes negatively charged upon contact with the covering film. In a case where the high-voltage conductor is charged to a negative polarity, a Coulomb's force acts on the metal foreign matter in contact with the covering film in a direction away from the high-voltage conductor. The metal foreign matter in the ground tank is thus suppressed from floating.

Abstract: A gas insulated switchgear includes a high-voltage conductor installed inside a ground tank filled with an insulation gas and the high-voltage conductor is supported on an insulation spacer and thereby fixed to the ground tank. The gas insulator switchgear is configured in such a manner that an insulation portion of the insulation spacer in contact with the insulation gas is covered with a cover film formed by hardening powder of any of thermoplastic resin, glass, cellulose, and polymer resin made of carbon and hydrogen having a particle size of 100 ?m or less with epoxy resin.

Abstract: To provide a gas-insulated switchgear including a metal tank that is grounded and has insulating gas filled therein, a central conductor that is extended in the tank and to which an alternating voltage is applied, an insulative coating film that is coated on an inner surface of the tank, and a coating film that is overcoated on the coating film and is formed by coating a coating material containing an insulative coating material component and a non-linear resistance material. Due to this configuration, behavior of metallic foreign matter can be suppressed in a wide range from a region having a small electric field to a region having a large electric field.

Abstract: Gas insulated electrical equipment includes: a metal enclosure having an insulating gas introduced therein; a conductor that is accommodated inside the metal enclosure and to which voltage is applied; and an insulating and supporting member insulating and supporting the conductor relative to the metal enclosure. The conductor is circumferentially covered with a dielectric film, and furthermore, a nonlinear resistance film provided on the dielectric film and having a nonlinear volume resistivity decreasing when the nonlinear resistance film is acted on by an electric field higher than a critical value.

Abstract: A gas insulated switchgear includes a high-voltage conductor installed inside a ground tank filled with an insulation gas and the high-voltage conductor is supported on an insulation spacer and thereby fixed to the ground tank. The gas insulator switchgear is configured in such a manner that an insulation portion of the insulation spacer in contact with the insulation gas is covered with a cover film formed by hardening powder of any of thermoplastic resin, glass, cellulose, and polymer resin made of carbon and hydrogen having a particle size of 100 ?m or less with epoxy resin.

Abstract: A gas-insulated switchgear includes a fixed-side electrode having a tubular fixed-side-conducting contact and a fixed-side shield for housing the fixed-side-conducting contact, and a movable-side electrode having a movable conductor driven by a driving unit to be connected to and separated from the fixed-side-conducting contact, facing each other in a container filled with an insulating gas. The switchgear includes a fixed-side-arc shield in the form of a circular plate, which is made of an arc-resistant member and has an opening of a diameter larger than the outer diameter of the movable conductor, the opening being formed on the side of the fixed-side shield facing the movable-side electrode. The fixed-side-arc shield is formed into a thin plate so as to cause an arc current to flow outward in a radial direction during contact parting of the fixed-side-conducting contact and the movable conductor to generate magnetic flux on a surface thereof in a circumferential direction.

Abstract: Gas-insulated bus is provided with: current-carrying conductor disposed along axial direction of metallic container that is filled with insulating-gas; shield fitting through which passes current-carrying conductor and that has depressed portion formed on portion of barrel-shaped outer surface; insulating support that has second end thereof fixed in depressed portion of shield fitting and has first end thereof fixed to metallic-container, and that supports current-carrying conductor via shield fitting; internal conductor being implanted in second end of insulating support and being, along with second end, positioned in depressed portion and fixed to shield fitting; and contact being attached to inner surface of shield fitting, being disposed in space formed on inside of shield fitting, and that makes contact with current-carrying conductor so as to maintain shield fitting and current-carrying conductor at same electric potential, wherein internal conductor has such shape that internal conductor and shield fit

Abstract: A foreign matters trap in which a metallic corrugated plate is arranged in a ground tank so that a line connecting portions of the corrugated plate having the same height is made parallel to a central axis of the ground tank, a metallic round rod is mounted to an corrugated end of the corrugated plate, the corrugated plate and the metallic round rod are connected electrically to each other, and a surface of the corrugated plate is covered by an insulating material. The foreign matters trap is capable of surely trapping metallic foreign matters in a gas insulated electric apparatus and suppressing concentration of an electric field to become excellent in voltage endurance and which can be readily mounted in a ground tank.

Abstract: An object is to provide gas insulated switchgear that is able to inhibit heat generation of a pressure container. Electrically-conductive members that are non-magnetic and have higher electric conductivity than that of the material of which the pressure container is made, are provided on the inside and on the outside of the pressure container, while being positioned along a main bus and being attached via a flange of the pressure container. Thus, eddy current that occurs when an electric current flows through the main bus are caused to flow through the electrically-conductive members having higher electric conductivity than that of the pressure container. Also, a current return path for the eddy current is formed by a flow path including the electrically-conductive members. Consequently, it is possible to reduce the eddy current flowing on the pressure container and to inhibit an increase in the temperature of the pressure container.

Abstract: In a gas-insulated power apparatus in which contiguous vessels 11, 12 (GIBC1, GIBC2) are coupled by way of flanges 111, 121 of respectives thereof, and power conductors 112, 122 (GIBC5) insulated from the vessels by an insulating gas 13 are included in the vessels, by squeezing the flange 111 of the vessel on one side to be coupled by a pressing member 14 screwed to the flange 121 of the vessel on other side and the flange 121 of 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.