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: 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 vacuum insulated switchgear is arranged as a panel for a power substation with the other or the others in parallel rows. the vacuum insulated switchgear comprises a housing with a switch section, a bus section, a cable section, and a control section which are partitioned by earthed metal plates respectively. The vacuum insulated switchgear comprises: a connection member provided in each bus connecting part in the bus section of the each panel and enabling each bus to be connected and disconnected; and a bus recovery member which is detachably connected between the connection members of faultless panels adjacent to a faulty panel when the faulty panel occurred.

Abstract: A gas-insulated power apparatus comprising a vertically arranged gas-insulated circuit breaker included in a vertically arranged gas-insulated main tank, a first gas-insulated branch pipe connected to one side of an upper portion of the gas-insulated main tank substantially orthogonal to a direction of extending the gas-insulated main tank and leading out a feeder from a movable side of the gas-insulated circuit breaker, and a second and a third gas-insulated branch pipes which are respectively connected to both sides in a peripheral direction of a lower portion of the gas-insulated main tank substantially orthogonal to the direction of extending the gas-insulated main tank, one of which connects a fixed side of the gas-insulated circuit breaker to one gas-insulated Y bus of gas-insulated double buses and other of which connects the fixed side of the gas-insulated circuit breaker to other gas-insulated X bus of the gas-insulated double buses, respectively, by which a gas-insulated power apparatus having a str

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 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: 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: 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 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: A gas insulated switchgear has: circuit breakers, circuit breaker vessels, first disconnector and maintenance earthning switches connected to first bus bars connected to circuit breaker vessels and also to main bus bars, second disconnector and maintenance earthning switches connected to second bus bars connected to the circuit breaker vessels, circuit breaker operating mechanisms, first and second disconnector and maintenance earthning switch operating mechanisms, and first and second disconnector and maintenance earthning switch operation links for linking the disconnector and maintenance earthning switches and the operating mechanisms for three phases. The second disconnector and maintenance earthning switch operation links are arranged so as to pass through inter-phases of the first bus bars and the operating panels of the circuit breaker operating mechanism and the first and second disconnector and maintenance earthning switch operating mechanisms of each phase are arranged on a common flat plane.

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: 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 fulfil 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: 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: 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.

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 power apparatus comprising a vertically arranged gas-insulated circuit breaker included in a vertically arranged gas-insulated main tank, a first gas-insulated branch pipe connected to one side of an upper portion of the gas-insulated main tank substantially orthogonal to a direction of extending the gas-insulated main tank and leading out a feeder from a movable side of the gas-insulated circuit breaker, and a second and a third gas-insulated branch pipes which are respectively connected to both sides in a peripheral direction of a lower portion of the gas-insulated main tank substantially orthogonal to the direction of extending the gas-insulated main tank, one of which connects a fixed side of the gas-insulated circuit breaker to one gas-insulated Y bus of gas-insulated double buses and other of which connects the fixed side of the gas-insulated circuit breaker to other gas-insulated X bus of the gas-insulated double buses, respectively, by which a gas-insulated power apparatus having a str

Abstract: A gas-insulated switchpanel of a medium-voltage switchgear assembly includes busbar connection and cable outlet regions with a manually actuable switch arrangement having a contact position, with a conductive connection from the busbar connection region to the cable outlet region via the switch arrangement and a vacuum contactor, driven by a magnet, and a grounding position, in which the cable outlet region and the vacuum contactor are grounded by the switch arrangement. The vacuum contactor switches a current between the busbar connection region and the cable outlet region in the contact position and the switchpanel has a relatively high current-carrying capacity. The switch arrangement grounding and isolatinges switch mechanically coupled to one another and actuable by a single drive. In the contact position, the isolating switch forms the conductive connection and, in the grounding position, the grounding switch connects the vacuum contactor and the cable outlet region with a grounding contact.

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: In a one-and-a-half circuit breaker system gas-insulated switchgear assembly for three-phase AC transmission, the circuit breakers are located on a common horizontal floor directed in Y direction. First main bus bars extending in X direction are located above the first circuit breakers. The positions of the first main bus bars in different phases are different from one another only in height. Similarly, the second main bus bars extending in X direction are located above the third circuit breakers. Each phase of the main bus bars and disconnecting switches is located in a common horizontal plane. The heights are different for different phases. Relative locations of the disconnecting switches are substantially common for every phase horizontally, but are shifted in the X direction.

Abstract: The invention relates to a gas-insulated switchgear, particularly a gas-insulated medium-voltage switchgear, according to claim 1. In order to satisfy additional safety requirements also with position 2 and 3 disconnectors in gas-insulated switchgears, an inspection glass (9) is inserted/mounted in the housing (10) such that the positions of the switching contact elements can be seen directly or indirectly via optical means from outside the housing.

Abstract: For simple structure and easy manufacture, module tanks have a common standardized size so that the same tank is applicable even when the components to be accommodated are changed. The basic structure of the module is arranged so that all of the interrupter, the disconnector with the grounding switch, the bus bar bushing, the cable connecting bushing and the gas section spacer can be mounted, and necessary main circuit components depending upon the circuit to be used are left behind and unnecessary main circuit components are short-circuited by a short-circuiting conductor, and that the tank opening portions are either left un-worked during manufacture or closed by a cover. The bus bar bushings and the cable connecting bushings are attached at the rear face of the tank and the gas section spacer is disposed on the top or bottom face of the tank. A lightning arrester in lieu of interrupter may be accommodated within an insulating cylinder housing the main circuit of the interrupter.

Abstract: The invention pertains to a current transformer (1?) for enclosed, gas-insulated high-voltage switchgear (10). According to the invention, a current transformer (1?) is characterized in that a removable installation flange (12, 12?) is provided on a fill opening (3c) of the core carrier (11) for one-piece current transformer cores (2). Among other things, embodiments pertain to: a removable installation flange (12, 12?) in the form of a two-part clamping flange (12) or in the form of a one-piece rotary flange (12?) that is screwed on the fill opening (3c) similar to a bayonet catch. Among other things, the attained advantages are: radially increased installation space for one-piece current transformer cores (2); reduced diameter (d) for one-piece current transformer cores (2) and reduced structural volume of the current transformer casing (11a).

Abstract: Disclosed is a gas-insulated switchgear device, in which a space for dismantlement and inspection work which facilitates the dismantlement and inspection work of circuit breakers at the time of the occurrence of accidents of the circuit breakers are provided and an installation area for the gas-insulated switchgear device can be reduced. The gas-insulated switchgear device includes a pair of spaced apart main bus lines, three circuit breakers connected between the main bus lines, a common space for dismantlement and inspection work provided between two of the three circuit breakers, and branch bus lines provided above the common dismantlement and inspection work space using the common dismantlement and inspection work space and disposed in such a manner that insulatedly leading-out directions of the branch bus lines cross in order to balance voltage.

Abstract: The switchgear assembly has a polyphase design and has a gas-filled, modular encapsulation for each phase. Provided as the modules are at least one busbar, which is guided predominantly horizontally, a circuit breaker and two combined disconnecting-earthing switches having a disconnection and grounding function. A first one of the combined disconnecting-earthing switches supports a section of the busbar and is connected between the busbar and a first current terminal of the circuit breaker. The second combined disconnecting-earthing switch is connected between an outgoing feeder or a further busbar of the assembly and the second current terminal of the circuit breaker. The combined disconnecting-earthing switches are aligned such that two drive apparatuses, which are provided for their actuation, point in the same, predominantly horizontal direction.

Abstract: A gas insulated switchgear has: circuit breakers, circuit breaker vessels, first disconnector and maintenance earthning switches connected to first bus bars connected to circuit breaker vessels and also to main bus bars, second disconnector and maintenance earthning switches connected to second bus bars connected to the circuit breaker vessels, circuit breaker operating mechanisms, first and second disconnector and maintenance earthning switch operating mechanisms, and first and second disconnector and maintenance earthning switch operation links for linking the disconnector and maintenance earthning switches and the operating mechanisms for three phases. The second disconnector and maintenance earthning switch operation links are arranged so as to pass through inter-phases of the first bus bars and the operating panels of the circuit breaker operating mechanism and the first and second disconnector and maintenance earthning switch operating mechanisms of each phase are arranged on a common flat plane.

Abstract: A distribution switchgear has an equipment room, main busbar room and cable room, which are formed in a distribution panel housing by partitioning the housing, from front to back such that the equipment room is located just behind the front door of the housing, with the busbar room behind the equipment room. In the equipment room, are disposed a circuit breaker, a current transformer on a load side of the circuit breaker and a zero-phase-sequence current transformer on a power supply side of the circuit breaker. The equipment units are vertically arranged in the equipment room. In the busbar room are a solid-insulated main busbar, a solid-insulated link busbar connected with the main busbar and connected with one side of each of the equipment units and a solid-insulated branch busbar connected with the other side of each of the equipment units.

Abstract: Single phase or polyphase switchgear having one or more switches which are mounted with the aid of solid insulation such that they are insulated, as well as associated live components such as rail systems, connectors and the like. Both the switches and the associated live components are housed in a housing enveloping the switches and live components. The enveloping housing is filled with air having a low moisture content and the interior space thereof is sealed with respect to the exterior space around the enveloping housing in such a way that the air present in the housing is not contaminated and will not reach the dew point.

Abstract: The aim of the invention is to prevent an unwanted conduction of a flow of gas inside a channel that connects an inner space of an enclosed switchgear (1) to another space. To this end, the channel is closed by means of a closing mechanism according to an increase in pressure in the inner space.

Abstract: A tank filled with an insulating gas accommodates insulator tubes incorporating vacuum-valve breakers for individual phases. One end of each insulator tube is fixed to the inside of the tank. Each vacuum-valve breaker is installed generally on a common longitudinal axis with the corresponding insulator tube so that a movable electrode rod is directed toward a fixed end of the insulator tube. The insulator tube has as an integral part a bus line fixing portion projecting in a direction intersecting the longitudinal axis of the insulator tube from the proximity of an end opposite to the fixed end, supporting a bus-side conductor in an insulated fashion.

Abstract: The invention provides a “hybrid” high voltage multiphase distribution substation having one or more sets of busbars including at least one air-insulated set of busbars (10), the substation having feeders (A, B, C, D) for air-insulated lines (21, 22) placed in substantially parallel bays (11, 12) on either side of the set(s) of busbars (10) and including metal-clad breaking and switching modules each formed by metal cladding (2) containing, for each electrical phase passing through a module, breaking and disconnection systems connected to a phase conductor (6) in an insulating gas, an end disconnection system (4A, 4B) being placed at each of the two ends (13, 14) of a module, the substation being characterized in that the feeders are opposite in facing pairs, and in that two opposite feeders (A, B) are electrically interconnected for each electrical phase via a single module (1) when the break systems (3A, 3B, 3C) and the end disconnector systems (4A, 4B) of said module are closed, said end discon

Abstract: A compact and economical gas-insulated switchgear is provided. The gas-insulated switchgear includes: a grounding metal housing 1 filled with insulating gas, and in which the disconnector part 2 having a moving side electrode part 2a and a stationary side electrode part 2b is accommodated; and composite insulating shields 17a, 17b 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 2a and 2b with the dielectric. To form the composite insulating shields 17a, 17b, a metal shield of less than 0.6 in non-uniform constant before coating with the dielectric is coated with dielectrics 18a, 18b having a thickness of not more than approximately 30% of an interelectrode distance from a facing electric-field relaxation shield.

Abstract: A gas-insulated switch gear has a plurality of bay units having bus ducts each containing a three-phase bus and connected by bellows expansion joints. When the bay unit needs to be inspected for maintenance, the bellows expansion joints are compressed, and only the bay unit can be pulled out of the gas-insulated switchgear.

Abstract: In a gas-insulated switching device capable of reducing the physical installation space while suppressing the installation height of the device, busbar connecting lines are disposed perpendicularly to and between as pair of main busbars to connect the main busbars. Three sets (one set per phase) of three serially connected horizontal broker units are placed in parallel, and each of the main busbars has three busbar units along a portion extending vertically from the end of the busbar connecting line.

Abstract: The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked by the insulating tube 21a and the primary-side lead lines 49 and 53 connected electrically to the primary-side terminal of the instrumentation transformers 6a and 7a are made routed from the container 15b through the insulating tube 21a to the container 15a, and the containers 15b and 15c are linked by the insulating tube 21b and the primary-side lead lines 51 and 55 connected electrically to the primary-side terminal of the instrumentation transformers 6d and 7e are made routed from the container 15b through the insulating tube 21b to the container 15c.

Abstract: In a gas insulated switchgear device, a phase transposing unit for bus line conductors is provided in a bus line tank without providing a separate bus line extending unit. A bus line container includes a plurality of tanks connected in a straight line shape in which three phase main bus line conductors are accommodated. The container also includes connecting ports through which conductors can be connected. Terminal portions near the connecting portions of respective phases of the three phase bus line conductors in at least one of the tanks are extended so as to match an arrangement position of three phase bus line conductors in an adjacent tank.

Abstract: In a conventional gas insulated switchgear device, when transposing bus line phases, a separate unit which extends bus lines is provided and the bus line phase transposition was performed with the extension unit. However, because of the use of such extension unit, a bay interval in the gas insulated switchgear device is elongated and the installation area thereof is enlarged.

Abstract: In order to shorten the length of connection buses and reduce a cost, in the present invention, a plurality of T-branched circuit breaker units 12 are arranged in a direction perpendicular to the T-branch direction, and the plurality of circuit breaker units 12 are connected by first connection bus units 14 and second connection bus units 15 in series alternately in a rectangular wave shape on a horizontal plane of approximately the same height as the T-branch portions of the circuit breaker units 12. Thereby, first connection buses 5 and second connection buses 6 are stretched around on the horizontal plane of the same height as the T-branch portions of the circuit breaker units 12, but not stretched around in an up and down direction. Therefore, the length of the connection buses can be reduced, and the cost also can be reduced.

Abstract: A gas insulated switchgear includes a plurality of T-branched circuit breaker units arranged in a direction perpendicular to the T-branch direction, and connected by first connection bus units and second connection bus units in series alternately in a rectangular wave shape on a horizontal plane of approximately the same height as the T-branch portions of the circuit breaker units. First connection buses and second connection buses are arranged around on the horizontal plane of the same height as the T-branch portions of the circuit breaker units, but are not arranged in an up and down direction.

Abstract: To provide a gas insulation switch reducing the SF6 gas use amount without damaging the insulation performance and arc extinguishing performance, the present invention uses SF6 gas as insulating gas to be charged in the grounding tank 1 of a unit having a switching unit of the breaker 5, the disconnecting switches 3, 4, and 8, and the grounding switches 6, 7; and 9, for example, the line unit 190 and uses gas having a smaller warming coefficient than that of SF6 gas, for example, nitrogen gas 23, or air as insulating gas to be charged in the grounding tank 1 of a unit having no switching unit, for example, the main bus units 100 and 110 and the connection bus unit 160.

Abstract: A gas-insulated switchgear comprising a gas-insulated first hermetic vessel, at least one electric device selected from a group consisting of an interrupter, a disconnector, a grounding switch and a load switch contained within the hermetic vessel. The switchgear also comprises a cable bushing having a first end that passes through and is secured to a lower vessel wall of the first hermetic vessel and connected to the electric device and a second end that is connectable to a cable, and bus conductor bushings mounted to the hermetic vessel. The switchgear may further comprise a second gas-insulated hermetic vessel disposed between the first vessel and the bus conductor, containing a disconnector or a disconnector and a grounding switch together, and an electrically insulated sealed terminal. The switchgear is compact and inexpensive, free from the damegaes by the explosive phenomenon due to the arc short-circuiting faults.

Abstract: The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked by the insulating tube 21a and the primary-side lead lines 49 and 53 connected electrically to the primary-side terminal of the instrumentation transformers 6a and 7a are made routed from the container 15b through the insulating tube 21a to the container 15a, and the containers 15b and 15c are linked by the insulating tube 21b and the primary-side lead lines 51 and 55 connected electrically to the primary-side terminal of the instrumentation transformers 6d and 7e are made routed from the container 15b through the insulating tube 21b to the container 15c.

Abstract: A gas-insulated switchgear provided with a resin mold bushing for supporting and insulating a main circuit conductor from a ground tank is miniaturized. A container portion 3a is formed by opening an end inside of the tank of a resin mold bushing 3 for supporting and insulating an internal conductor 7 from a ground tank 1 where a breaker 2 and a disconnector are accommodated. A blade-supporting conductor 5 of the disconnector for joining the internal conductor 7 and the disconnector is installed in the container portion.

Abstract: A device for carrying high currents at a low inductance, in particular for a power converter or the like, is provided with two flat electrical conductors which are arranged roughly parallel to each other and are spaced apart from each other. The space between the two conductors contains no transition from one of the two conductors to a solid-state insulator, and from there to the other of the two conductors. As a result, no aging phenomena can arise in the device according to the invention owing to partial discharges.

Abstract: In order to provide a good gas-insulated circuit breaker which is compact and easy in assembling and preparation, a gas-insulated circuit breaker 100 is constructed with a grounded enclosure 104 enclosed a insulation nature gas, a current interruption part having a fixed contactor 115 arranged in the grounded enclosure 104 and a movable contactor 116 to be contacted with and to be separated from the fixed contactor 115, and an operating mechanism 101 to output a driving force to drive the movable contactor 116, wherein a grounded enclosure side main rotating shaft 110 connected to the movable contactor 116 through a connection member and a main output shaft 102 for outputting a rotating force to actuate the movable contactor 116 through the grounded enclosure side main rotating shaft 110 provided on the operating mechanism 101, are arranged on a coax so as to be coupled with a gear coupling 120, and the operating mechanism 101 is arranged almost under the grounded enclosure 104.

Abstract: A gas insulated switchgear of the present invention, a plurality of disconnect switches are provided on a line connecting a bus line to a circuit-breaker in such a manner as to be arranged in both a main bus unit, a breaker unit or in both a first and second insulating gas sections. Accordingly, when an inconvenience occurs in the gas insulated switchgear apparatus and the exchange work of a unit is required, it is possible to exchange the inconvenient damaged unit only by turning the circuit including the inconvenient damaged unit into power supply interruption, that is, without turning a normal circuit unit into power supply interruption.

Abstract: To provide a gas insulation switch reducing the SF6 gas use amount without damaging the insulation performance and arc extinguishing performance, the present invention uses SF6 gas as insulating gas to be charged in the grounding tank 1 of a unit having a switching unit of the breaker 5, the disconnecting switches 3, 4, and 8, and the grounding switches 6, 7, and 9, for example, the line unit 190 and uses gas having a smaller warming coefficient than that of SF6 gas, for example, nitrogen gas 23, or air as insulating gas to be charged in the grounding tank 1 of a unit having no switching unit, for example, the main bus units 100 and 110 and the connection bus unit 160.

Abstract: To provide a gas insulation switch reducing the SF6 gas use amount without damaging the insulation performance and arc extinguishing performance, the present invention uses SF6 gas as insulating gas to be charged in the grounding tank 1 of a unit having a switching unit of the breaker 5, the disconnecting switches 3, 4, and 8, and the grounding switches 6, 7, and 9, for example, the line unit 190 and uses gas having a smaller warming coefficient than that of SF6 gas, for example, nitrogen gas 23, or air as insulating gas to be charged in the grounding tank 1 of a unit having no switching unit, for example, the main bus units 100 and 110 and the connection bus unit 160.

Abstract: A gas insulation switch has a container charged with insulating gas which contains an electric conductor and at least a pair of contactors. The container is divided into a plurality of sections. For the sections which have no switching devices or separable contactors, a different insulating gas is used as compared with that for the sections having breakers or separable contactors. In particular, in the section of the container, such as a grounding tank, that contains only electric conductors without separable contactors, an insulating gas having a smaller earth warming coefficient or global warming coefficient than that of SF6 gases is used. On the other hand, for the section of the grounding tank which contains a breaker or switch having separable contactors, an SF6 insulating gas is used.

Abstract: A gas insulated switch gear has a main bus unit, a circuit breaker unit and a line unit. The line unit has a top plate with a hole through which a potential transformer is inserted into the inside of the line unit and an adapter cover fixed to the potential transformer is connected to the top plate.

Abstract: The encapsulation (1) of a gas-insulated switchgear assembly is supported at both ends (7, 9) on a foundation (11). To this end, mounting device (12) are provided at the first end (7) and are anchored in the foundation (11) such that they cannot move. At the second end (9), the mounting device (13) are designed such that they can move with respect to the foundation (11), in the longitudinal direction of the encapsulation (1). This avoids mechanical stresses in the assembly. A force absorbing member is also provided at the first end (7), which transmits horizontal forces from the encapsulation (1) to the foundation (11), and thus relieves the load on the mounting device (12, 13).