Abstract: A switch-fuse module and a ring main unit. The switch-fuse module includes: a housing having therein a switch enclosure including an insulating gas and a cable compartment that is different and separate from the switch enclosure; at least one switch disconnector arranged within the switch enclosure; and at least one fuse canister with a vertically oriented longitudinal axis; wherein the fuse canister i) is adapted to receive a fuse, and ii) is arranged within the cable compartment, and the insulating gas has a global warming potential less than a global warming potential of SF6.

Abstract: A gas insulated switchgear (GIS) system is provided including at least two separate modules including components of GIS, the at least two separate modules being independent of one another and configured to be assembled into the GIS system at a destination, wherein one or more of the at least two separate modules includes one of cabling and a solid insulated bus bar to connect the GIS system to an electrical power system at the destination. Related cabling modules are also provided.

Abstract: Housings for gas in a gas insulated switchgear (GIS) system is provided. The housing includes a pressure relief mechanism incorporated into the housing. The pressure relief mechanism includes a portion of the housing having a first thickness, different from a second thickness of a remaining portion of the housing, the first thickness being less than the second thickness. The pressure relief mechanism is configured to rupture at predetermined overpressure conditions to vent bi-products of an arc fault in the GIS system.

Abstract: A cable adapter that is operable to electrically couple an existing switchgear cable used for old switchgear to a connection location on new switchgear. The adapter includes an elbow portion that is configured to be electrically coupled to a connector for the switchgear cable and an extension portion that is electrically coupled to the elbow portion. The adapter also includes a cylindrical connection portion electrically coupled to the extension portion and being configured to be electrically coupled to the new switchgear at the proper location. In one embodiment, the elbow portion, the extension portion and the connection portion combine as a single piece member including an internal conductor, a dielectric insulation rubber layer covering the internal conductor and an outer semi-conductive rubber layer covering the insulation layer, where the rubber layers are molded over the conductor.

Abstract: In order to develop a gas-insulated medium-voltage switchgear assembly, which has an encapsulated container for accommodating components of the medium-voltage switchgear assembly, a grounding contact and a grounding busbar terminal provided on the outer side of the container, such that it has a simple and economical design, it is proposed that the grounding contact is secured by integral bonding in a container opening and has the grounding busbar connection terminal.

Abstract: In a switchgear in which cables are used on both of the input side and the output side for connection between a main circuit and an external main circuit, a circuit breaker and connection conductors of the switchgear are stored in a box-shaped pressure tank together with insulating gas; an operating mechanism that performs opening and closing operation of the circuit breaker and a first cable connection portion that is connected to the connection conductors are attached to one face of the pressure tank; and a second cable connection portion that is connected to the connection conductors is attached to the other face of the pressure tank, the other face being parallel with respect to a direction connecting the operating mechanism and the circuit breaker.

Abstract: A gas-insulated switchgear includes: a circuit breaker; a connection bus bar; a first disconnect switch; a second disconnect switch; a line bus bar; a main bus bar; and an abutment. The circuit breaker includes first and second branch outlets provided on a side surface of a cylindrical circuit breaker tank. The connection bus bar has one end connected to the first branch outlet. The first disconnect switch is connected to the other end of the connection bus bar. The second disconnect switch is connected to the second branch outlet. The line bus bar is led out from the second disconnect switch in a horizontal direction. The main bus bar is arranged above the second disconnect switch coaxially with the second branch outlet. The abutment is fixed to a top portion of the second disconnect switch and supports the main bus bar from below.

Abstract: A housing for a switchgear assembly module of a switchgear assembly forms a common gas space suitable for accommodating an insulating gas and three gas-insulated busbar nominal conductors of the switchgear assembly module. The housing includes three first busbar openings, which are arranged areally in a first opening plane and along a first straight line, three second busbar openings, which are arranged on a side, which is opposite the three first busbar openings, of the housing, and three outgoing conductor openings which are arranged areally in a second opening plane and along a second straight line.

Abstract: A switchgear having an electrified conductor accommodated in a tank in which insulating gas is contained includes a fixed contact connected to the electrified conductor, a movable contact installed to be contactable and separable to and from the fixed contact, an insulating rod that is externally extended from inside of the tank while being electrically insulated from the tank and turned by an operation device, and an insert that is extended from an end of the insulating rod toward the movable contact and is rotatably supported by a holding part installed in the electrified conductor. A flange part that is installed in the insert at a position where the holding part opposes the insulating rod and is extended in a substantially right-angle direction with respect to a direction of a rotation axis of the insulating rod is formed on the insert.

Abstract: A gas insulated switchgear including a circuit breaker, a first through third switches, a voltage transformer, a cable head, a gas insulated busbar unit, and first and second current transformers is provided. The gas insulated busbar unit is connected with the second current transformer and the first and second switches are connected with a bottom of the gas insulated busbar unit. The third switch is connected with the first current transformer, the cable head is connected with the third switch, and the voltage transformer is connected with a top of the cable head. The first and second current transformers are respectively connected with first and second sides of the circuit breaker.

Abstract: A switchgear assembly module has a housing, which forms a common gas space for accommodating an insulating gas for the switchgear assembly module. The switchgear assembly module includes a busbar conductor arrangement having three busbar conductor sections, which are accommodated in the common gas space, an outgoing conductor connection group with three outgoing conductor openings and with three outgoing conductor sections, which extend from within the housing towards a respective one of the outgoing conductor openings, and three switch disconnectors, which each connect a respective one of the busbar conductor sections to a respective one of the outgoing conductor sections via a disconnection point. The disconnection point of a first one of the switch disconnectors is arranged on a first side of an outgoing normal plane and the disconnection point of a second one of the switch disconnectors is arranged on a second side of the outgoing normal plane.

Abstract: In order to obtain a switchgear which can improve heat dissipation efficiency, in the switchgear which dissipates heat outside an apparatus vessel, the heat being generated from an electrical apparatus placed in the apparatus vessel, the switchgear includes a first heat conductor in which one side is connected to a heat generation portion of the apparatus vessel and the other side is extended toward the apparatus vessel side, a second heat conductor in which one side is disposed near the other side of the first heat conductor and the other side is extended outside the apparatus vessel, and an insulating member between conductors disposed between the other side of the first heat conductor and one side of the second heat conductor.

Abstract: A GIS (Gas Insulated Switchgear) includes a main bus compartment including a main bus-bar unit, a transfer bus compartment including a transfer bus-bar unit, a sealed circuit breaker compartment including a circuit breaker unit and a load side compartment including a current transforming unit and a transfer bus conductor electrically coupling the transfer bus-bar unit and the current transformer unit. The circuit breaker unit is contained in the sealed circuit breaker compartment being separately independent from other compartments. The transfer bus conductor passes from the transfer bus-bar unit through the load side compartment to the current transformer unit without passing through the circuit breaker compartment. The sealed circuit breaker compartment and the load side compartment do not share insulating gas.

Abstract: The present disclosure relates to a gas insulated switchgear (GIS), and more particularly, a structure of a bus in a GIS. A structure of a three-phase integrated bus in a GIS, in a bus of a gas insulated switchgear comprising an enclosure, three phase conductors inserted in the enclosure, and spacers coupled to both sides of the enclosure to fix the three phase conductors, is characterized in that the three phase conductors are arranged in a shape of inverted triangle, wherein a conductor located at a lower side, of the three phase conductors, is formed in a shape of straight pipe, and has a branch bus upwardly extending from its middle portion, and wherein each of two conductors located at an upper end of the inverted triangle, of the three phase conductors, has both side portions formed in a shape of straight pipe and a middle portion outwardly curved.

Abstract: A contact bus bar assembly for supplying power to a load, and further pertains to a switching device which can be connected to such a compact bus bar assembly, and to a power distribution system. The bus bar assembly includes at least two electrically conductive tracks which are at least partly covered by an electrically insulating cover. An outer surface of said insulating cover is provided with a plurality of ribs arranged in a region connecting pin terminals. The switching device may additionally comprise a separating element provided with a plurality of second ribs.

Abstract: 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.

Abstract: The current in a generator circuit breaker is measured using the Faraday effect of an optical sensing fiber looped around the breaker's conductor. The sensing fiber is arranged in a sensing strip, which can be mounted to the enclosure of the generator circuit breaker or to the conductor. Exemplary embodiments can have a wide measuring range and can easily be fitted to new or existing generator circuit breakers.

Abstract: 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.

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 switch bay for a high-voltage switchgear assembly includes three gas-insulated circuit breakers each for corresponding one of first, second and third current phases. The circuit breakers are arranged parallel to one another along an x direction. Three switch disconnectors are provided for a corresponding one of the first, second and third current phases. The switch disconnectors each have a corresponding isolating gap. The isolating gaps are arranged parallel to one another. A first busbar phase conductor section of the first current phase and a second busbar phase conductor section of the second current phase extend parallel to one another along a y direction, which runs transversely with respect to the x direction. A busbar connection is provided for connection of a third busbar phase conductor section of the third current phase.

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: A gas-insulated switchgear bay includes at least three circuit breakers, which define a longitudinal direction, for interrupting conductor phases at different electrical potentials. The circuit breakers each have a first and second power connection, which define a first and second axis extending orthogonally to the longitudinal direction. A first busbar section is attachable to the first power connection, and the first busbar conductors thereof, each define a third axis, which extends orthogonally to the longitudinal direction and the first axis. A second busbar section is attachable to the second power connection, and the second busbar conductors thereof, each define a fourth axis, which extends orthogonally to the longitudinal direction and the first axis. A first distance between the first and second axes is such that the fourth axis is arranged with respect to position and orientation on a common straight line with the third axis in the second mounting state.

Abstract: The invention relates to a gas-insulated medium-voltage switchgear comprising circuit breakers, disconnectors, and earth electrodes according to the preamble of patent claim 1. The aim of the invention is to fulfill the described market-specific requirements and to improve one such gas-insulated medium-voltage switchgear. To this end, the circuit breaker region is measured in such a way that the circuit breakers, and the output-side disconnectors and earth electrodes are all arranged therein.

Abstract: A gas-insulated electric device, by which a cross-sectional area of a central conductor can be reduced. The gas-insulated electric device includes an insulation tube that ranges to portions facing to ground potential portions for a central conductor and to upper-lower portions along the grounding potential portions, and is coaxially arranged along the central conductor in a state where a gap intervenes between the central conductor and the insulation tube; a conductive layer that is formed on an inner surface of an insulation tube and is electrically connected to the central conductor; and a ground layer that is formed on an inner surface or an outer surface of the insulation tube and is grounded; in which heat generated from the central conductor is radiated by convecting the insulation gas through the gap between the central conductor and insulation tube.

Abstract: The vacuum insulated switchgear includes: a housing enclosing a control compartment, a switch compartment, and a busbar compartment, each of the three compartments being partitioned by a metallic earthing plate; a first busbar and second busbar extended from an adjacent panel, in the busbar compartment; and a first busbar-connecting bushing and second busbar-connecting bushing making the first and second busbars connectible/disconnectible; a double-breaking three position vacuum switch, two sets of earthing switches, the first busbar-connecting bushing, and the second busbar-connecting bushing being integrally molded to form a switch provided on an electrical phase-by phase basis independently, wherein the switches for three phases are arranged in order side by side in the housing.

Abstract: The invention relates to a gas-insulated high-voltage switchgear, comprising at least one bus bar with three phase conductors, whereby each phase conductor is connected to the input of a respectively provided bus bar section. The phase conductor and the bus bar section are arranged in a three-phase bus bar module with three single-phase power switches, each arranged in a separate power switch housing and each bus bar section is connected at the output therefrom to a respectively provided power switch.

Abstract: A housing for a switchgear assembly module of a switchgear assembly forms a common gas space suitable for accommodating an insulating gas and three gas-insulated busbar nominal conductors of the switchgear assembly module. The housing includes three first busbar openings, which are arranged areally in a first opening plane and along a first straight line, three second busbar openings, which are arranged on a side, which is opposite the three first busbar openings, of the housing, and three outgoing conductor openings which are arranged areally in a second opening plane and along a second straight line.

Abstract: 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.

Abstract: An exemplary gas-insulated switchgear device is disclosed which includes a current sensor and a voltage sensor located at a partition insulator. The current sensor can include a magneto-optical fiber on a flexible carrier strip and can be manufactured separately for being easily mounted to an assembled switchgear device. The current sensor can include an electro-optical fiber extending radially into the partition insulator and whose ends are embedded in recesses in the bus bar as well as in the metal embracing of the partition insulator for accurately integrating the voltage.

Abstract: The object is to provide ring-bus-type gas insulated switchgear that ensures maintenance and inspection performance, reduces the installation space, and further reduces costs. Each of a plurality of breaker units is formed by connecting an instrument current transformer and a disconnector to each of the upper and lower branch ports drawn horizontally from the side surface of a vertical breaker in the same direction, and the breaker units are arranged in parallel. Adjacent disconnectors are connected to each other by a connection bus, so that the bus route runs alternately at upper and lower levels. Furthermore, the breaker units positioned at the two ends are connected linearly to each other by a communication bus. In addition, the line-side devices are arranged to face the corresponding breaker units across the disconnectors.

Abstract: One or more infrared transmitting ports are placed in the insulating housing of standard switchgear components to allow far infrared viewing of internal conductive components permitting earlier and more precise location of possible thermal failure through thermographic monitoring.

Abstract: A gas-insulated switchgear apparatus includes a center conductor 2, a current transformer 4 surrounding the center conductor 2, an electric field shield 5, and a metallic vessel 1. The electric field shield 5 is located between the center conductor 2 and the current transformer 4 and surrounds the center conductor 2. The current transformer 4 and the electric field shield 5 constitute a tubular part that outputs a signal representing an electric physical quantity. The metallic vessel 1 is filled with an insulating gas 19. The tubular part has an opening 6 formed therein. In a posture in which the center axis of the tubular part about which the tubular part surrounds the center conductor 2 is substantially horizontal, the opening 6 is 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 2.

Abstract: A switchgear assembly module has a housing, which forms a common gas space for accommodating an insulating gas for the switchgear assembly module. The switchgear assembly module includes a busbar conductor arrangement having three busbar conductor sections, which are accommodated in the common gas space, an outgoing conductor connection group with three outgoing conductor openings and with three outgoing conductor sections, which extend from within the housing towards a respective one of the outgoing conductor openings, and three switch disconnectors, which each connect a respective one of the busbar conductor sections to a respective one of the outgoing conductor sections via a disconnection point. The disconnection point of a first one of the switch disconnectors is arranged on a first side of an outgoing normal plane and the disconnection point of a second one of the switch disconnectors is arranged on a second side of the outgoing normal plane.

Abstract: 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.

Abstract: A gas-insulated switchgear allowing reduction in layout dimension in a direction of axis lines of circuit breakers and also reduction in layout dimension in a direction orthogonal to the direction of the axis lines of the circuit breakers, thereby allowing reduction in installation area. Between two main buses disposed in parallel, first, second and third circuit breakers are disposed as being aligned so that each axis line is orthogonal to a direction of axis lines of the main buses. A branch line drawn from a portion between the first and second circuit breakers and a branch line drawn from a portion between the second and third circuit breakers are connected to respective cable heads. The centers of the cable heads are configured so as to be positioned on a straight line orthogonal to the direction of the axis lines of the main buses.

Abstract: [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.

Abstract: 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.

Abstract: The invention relates to a gas-insulated high-voltage switchgear, comprising at least one bus bar with three phase conductors, whereby each phase conductor is connected to the input of a respectively provided bus bar section. The phase conductor and the bus bar section are arranged in a three-phase bus bar module with three single-phase power switches, each arranged in a separate power switch housing and each bus bar section is connected at the output therefrom to a respectively provided power switch.

Abstract: Each integral unit is structured by arranging partial units (I), (II), and (Ill) side by side, while line-side devices are branched from positions between the partial units adjacent to each other. Each of the partial units is structured by connecting a current transformer and a disconnector in sequence to each of upper and lower outlets horizontally drawn out from a lateral face of a vertical-type circuit breaker in the same direction. Any two partial units positioned adjacent to each other are connected in series by connecting the disconnectors included therein with a connection bus. The line-side devices are positioned to oppose the circuit breakers while the disconnectors are interposed therebetween. The switchgear includes a plurality of integral units. Two ends of each of the integral units are respectively connected to two main buses that are provided in an upper position and a lower position while the disconnectors are interposed therebetween.

Abstract: A gas-insulated switchgear is provided, which can be made smaller and causes less increase in length in the circuit direction, by means of an improvement to the layout configuration of the operating rod of a bus-use grounding switch. Operating rods of bus-use grounding switches are vertically disposed so as to be substantially perpendicular to the buses, and operating devices are disposed along an extension of the operating rods, respectively. Bus-use voltage transformers are horizontally disposed in such a manner that they vertically overlap each other, and are respectively connected in the circuit breaker direction of the buses.

Abstract: 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.

Abstract: A connector switchpanel for medium voltage switchgear assemblies includes first and second feed devices connected together by conductors with a busbar branch on a connector. Disconnectors disconnecting the conducting connection and disconnecting the busbar branch and grounding contacts are provided. An improved compact construction and simplified operation are provided due to the connector switchpanel being a gas-insulated switchpanel and each of the first and second feed devices being connected by a three-position switch to the busbar branch with contact, disconnecting and grounding positions.

Abstract: An optical fiber of which one end is optically coupled to a laser light source propagating, from the one end to other end, a laser light emitted from the laser light source. A light-guiding plate includes a light-guiding section in which a plurality of right prisms of the same shape for extracting the laser light by contacting the optical fiber are arranged parallel to each other in the same direction at equal intervals. A planar section diffuses the laser light extracted from the light-guiding section and emits the diffused laser light from one main surface. The optical fiber is bent more than twice to form a plurality of straight line portions arranged parallel to each other at unequal intervals, and the optical fiber and the light-guiding plate are positioned such that the laser light is extracted at equal intervals from each of the plurality of straight line portions.

Abstract: A metal-encapsulated, gas-insulated high-voltage switchgear assembly includes a three-phase encapsulated busbar housing, at least one busbar disposed in the housing, and at least three single-phase-encapsulated circuit breakers disposed horizontally. The assembly further includes a busbar splitting module having at least one three-phase connecting flange configured to connect to the busbar housing and at least three single-phase connecting flanges pointing downward configured to connect to the at least three single-phase-encapsulated circuit breakers and an outgoer splitting module having at least one three-phase flange and at least three single-phase flanges pointing downward and configured to connect the at least three single-phase-encapsulated circuit breakers to a three-phase-encapsulated outgoer housing.

Abstract: A power transmission/reception line circuit breaker includes a vertical-type first circuit breaker tank and a plurality of branch lead-out ports arranged at an interval H. A busbar-side device is connected to each branch lead-out port other than an uppermost branch lead-out port to which a line-side device is connected and a busbar. A busbar link line circuit breaker includes a vertical-type second circuit breaker tank having a length shorter than that of the first circuit breaker tank by the interval H and a plurality of branch lead-out ports arranged at the interval H. A busbar-side device is connected to each of the branch lead-out ports.

Abstract: In a gas-insulated switchgear provided with three-phase main bus bars consisting of single-phase bus bars arranged in parallel with one another and three-phase circuit breakers that are arranged in parallel with one another in a direction perpendicular to the main bus bar and each have two connecting terminals that are spaced a predetermined distance apart from each other, the main bus bars are arranged between two connecting terminals of each of the circuit breakers.

Abstract: 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.

Abstract: The present invention provides a gas-insulated electric apparatus which includes: a vertically-arranged gas insulation main tank; a first gas insulation branch pipe connected to and making right angle with the gas insulation main tank; a second gas insulation branch pipe connected to and making right angle with the gas insulation main tank; a breaker manipulator which is arranged on an upper side of the main tank, a feeder-side current transformer which is incorporated in the first gas insulation branch pipe; a voltage transformer arranged on the first gas insulation branch pipe; and an arrestor arranged on the first gas insulation branch pipe and connected with the feeder.

Abstract: 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.

Abstract: Switchgear having a vacuum-insulated switchgear 2 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and solid-insulated bus bars 12 for electrically connecting the switches in each unit; an air-insulated switchgear 1 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and air-insulated bus bars for electrically connecting the switches in each unit; and_the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are installed side-by-side, wherein the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are electrically connected through flexible conductors 17 which are provided between the solid-insulated bus bars 12 and the air-insulated bus bars.