Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
  • H01H33/66—Vacuum switches
  • H01H33/666—Operating arrangements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
  • H01H31/003—Earthing switches
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H1/00—Contacts
  • H01H1/58—Electric connections to or between contacts; Terminals
  • H01H1/5822—Flexible connections between movable contact and terminal
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
  • H01H33/66—Vacuum switches
  • H01H33/662—Housings or protective screens
  • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
  • H01H2033/6623—Details relating to the encasing or the outside layers of the vacuum switch housings
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
  • H01H33/66—Vacuum switches
  • H01H33/666—Operating arrangements
  • H01H2033/6668—Operating arrangements with a plurality of interruptible circuit paths in single vacuum chamber
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/12—Means for earthing parts of switch not normally conductively connected to the contacts

Definitions

• the present invention includes a plurality of switches, such as a main circuit switch including a breaking part and a disconnecting part that connects and disconnects the bus side and the load side, and a plurality of grounding switches that connect and separate the load side and the grounding conductor.
• the present invention relates to a test terminal structure of a composite insulation vacuum switchgear (switch) in which a vacuum container is molded.
• switch gears are used to distribute power received from a bus to various types of load equipment and other electrical rooms.They are connected to a bus-side conductor for connection to the bus and a power transmission cable to the load.
• connection conductors such as the load side conductor for connection, the main circuit switch for connecting / disconnecting the bus side conductor and the load side conductor, the grounding switch for grounding the load side conductor, and the The internal equipment such as control equipment is arranged appropriately in an outer box made of grounded metal.
• this switchgear for example, as described in Japanese Patent Publication No. 7-284488, a main circuit switch and a ground switch as main internal devices are integrated together with a part of a connection conductor.
• a switchgear provided with a function unit configured in such a manner that the function unit is disposed in an outer box and only the connection with the bus and the power transmission cable needs to be performed.
• FIG. 8 is a configuration diagram showing a main part of a conventional switch gear described in, for example, Japanese Patent Publication No. 7-284488
• FIG. 9 is an electrical connection diagram of the switch gear shown in FIG.
• the container 100 is made of grounded metal, and contains SF 6 gas (insulating gas) inside. Then, a pusher 92 for connecting the power transmission cable and a pusher 92 for connecting the bus are airtightly inserted into a part of the peripheral wall of the container 100, and further, the first, second and third switches are provided. 50, 51, 52 and a vacuum arc extinguishing chamber 90 are disposed in the container 100.
• the three bus-bar-side branch conductors 61 are supported by insulating support insulators 110, respectively. It is arranged in 100 and is connected to the bus of the corresponding phase of the external three-phase bus (not shown) via the bushing 92b. These bus-bar-side branch conductors 61 are connected to the first switch 50 via switchgears (not shown) provided in the corresponding vacuum arc extinction chambers 90.
• Intermediate conductors 60 are fixedly supported by insulating support insulators 11 1, respectively, and are disposed in the container 10 °. Then, the first switch 50 is connected to the intermediate conductor 60, is branched in two directions by the intermediate conductor 60, and is connected to the second and third switches 51, 52. I have.
• Six load-side conductors 92 are disposed so as to pass through the container 100 while being supported by the pushing 92a.
• the six load-side conductors 92 constitute two sets of three-phase load-side conductors.
• the second switch 51 is connected to an external power transmission cable (not shown) through one set of three-phase load-side conductors 92
• the third switch 52 is connected to another set of three It is connected to an external power transmission cable via the phase load-side conductor 92.
• the first switch 50 includes an oscillating electrode 5 Ob which is oscillated around an axis 50a via a metal link 80 and an insulating link 70 by an operation mechanism (not shown).
• the oscillating electrode 5 Ob is connected to a fixed electrode protruding at a position corresponding to the output electrode of the opening / closing device inside the vacuum arc extinction chamber 90 and the intermediate conductor 60 according to the oscillating position.
• a grounding position connected to the grounding conductor 100a, and a disconnection position between the fixed position and the grounding conductor 100a between the closed position and the grounding position. It is configured to take.
• the second switch 51 includes an oscillating electrode 5 lb which is oscillated around the axis 51 a via a metal link 80 and an insulating link 70 by an operation mechanism (not shown).
• the swing electrode 5 lb has a closed position connecting the load-side conductor 92 and the fixed electrode protruding at a position corresponding to the intermediate conductor 60 according to the swing position, and a grounding conductor. It is configured to take a ground position connected to 100 b and a disconnection position between the fixed position and the grounding conductor 100 O b, which is intermediate between the closed position and the ground position.
• the third switch 52 includes an oscillating electrode 52 b that is oscillated around an axis 52 a via a metal link 80 and an insulating link 70 by an operation mechanism (not shown). So The oscillating electrode 52b is provided with a closing position for connecting the load-side conductor 92 and the fixed electrode protruding at a position corresponding to the intermediate conductor 60, according to the oscillating position, and a grounding conductor. It is configured to take a grounding position connected to 100 c and a disconnection position between the fixed position and the grounding conductor 100 c, which is intermediate between the closed position and the grounding position.
• the conventional switchgear has a first and a second switch that constitute a main circuit switch that connects and separates the bus-side branch conductor 61 and the load-side conductor 92 and a ground switch that grounds the load-side conductor 92.
• the second and third switches 50, 51, 52 are arranged in the container 100 together with the busbar-side branch conductor 61 and the load-side conductor 92, thereby realizing miniaturization.
• the bus-side branch conductor 61 is connected to an external bus via the pushing 92b
• the load-side conductor 92 is connected to the power transmission cable via the pushing 92a. It is applied to the application to distribute the power received from the bus to various load devices.
• a pushing through which the test terminal is inserted is penetrated through the wall of the container 100, and furthermore, the test terminal in the container 100 is closed.
• the protruding end is connected to the grounding conductor 100a, 100Obs 100c. Then, a withstand voltage test of the power transmission cable is performed using the test terminal.
• the conventional switchgear has a bushing in which the test terminal is inserted through the container 100 in which the insulating gas is filled, and the bushing installation space is thus reduced. This necessitates a problem that the volume of the container 100 becomes large and the cost increases.
• a main circuit contact including a fixed side and a movable side is provided in a vacuum container, and main circuit conductors respectively connected to these two contacts penetrate the wall of the vacuum container.
• a ground conductor penetrating through the wall of the vacuum vessel and having one end disposed so as to be able to contact and separate from at least one of the main circuit conductors in the vacuum vessel;
• An operating mechanism connected to the other end of the grounding conductor extending from the container, and a grounding / testing terminal connected to the other end of the grounding conductor extending from the vacuum container so as to be relatively displaceable. It is equipped with.
• the vacuum vessel is grounded, and the grounding / testing terminal is insulated from the vacuum vessel.
• grounding / testing terminal and the other end of the grounding conductor are connected by a flexible conductor, and a connecting portion between the grounding conductor and the flexible conductor is surrounded by a cylindrical insulating barrier. is there.
• the vacuum container is formed by molding a metal tank with an insulating resin, and the grounding / testing terminal is insulated from the tank and molded integrally with the tank with the insulating resin. is there.
• grounding / testing terminal is formed in a ring shape surrounding the grounding conductor, and the flexible conductor is connected to one end of the ring-shaped grounding / testing terminal.
• grounding conductor penetrates through the bottom of a bottomed cylindrical flange insulated and fixed to the tank, and is airtightly and elastically attached.
• One end of the grounding / testing terminal is connected to the flange.
• a ring-shaped insulating elastic member is interposed between one end of the ring-shaped grounding / testing terminal and the flange.
• a space between the insulating member and the insulating barrier is tightly closed by a stretchable insulating member.
• a U-shaped connection terminal is attached so that one end is connected to the other end of the ground conductor and is orthogonal to the axial direction of the ground conductor, and the flexible conductor is connected to the other end of the connection terminal. Is what is being done.
• a flange portion extends to the insulating barrier side over the entire periphery of the edge of the insulating member, and is formed to have an inner diameter larger than the outer diameter of the insulating barrier.
• the flange portion is disposed so as to overlap the front end portion of the insulating barrier in the axial direction of the ground conductor when in contact with the circuit conductor.
• FIG. 1 is a side sectional view schematically showing a configuration of a switch gear according to Embodiment 1 of the present invention
• FIG. 2 is an electrical connection diagram of the switchgear according to the first embodiment of the present invention
• FIG. 3 is a diagram schematically showing a main part of the switchgear according to the second embodiment of the present invention
• FIG. FIG. 4 is a side cross-sectional view schematically illustrating a main part of the switch gear according to Embodiment 3.
• FIG. 5 is a side sectional view schematically showing a main part of a switch gear according to Embodiment 4 of the present invention.
• FIG. 6 is a diagram schematically showing a main part of a switch gear according to a fifth embodiment of the present invention.
• FIG. 6 is a side sectional view schematically showing a main part of the switch gear according to a sixth embodiment of the present invention.
• FIG. 8 is a configuration diagram showing a main part of a conventional switch gear
• FIG. 9 is an electrical connection diagram of a conventional switch gear. BEST MODE FOR CARRYING OUT THE INVENTION
• FIG. 1 is a side sectional view schematically showing a configuration of a switch gear according to Embodiment 1 of the present invention. Here, a single-phase switch gear is shown.
• a vacuum vessel 1 has a metal tank 2 and perforations on both end faces of the tank 2.
• Cylindrical insulating members 3a to 3d made of insulating ceramics, which are air-tightly brazed (joined) to the outer edges of the plurality of openings, and those of the insulating members 3a to 3d and air-tight. It is provided with a bottomed cylindrical flange 4a to 4d joined, and an insulating resin 5 in which the tank 2, insulating members 3a to 3d and flanges 4a to 4d are integrally molded.
• the inside of the vacuum vessel 1 is maintained in a vacuum, and a conductive treatment is performed on the outer peripheral surface of the color resin 5 to form a conductive film 19, and the conductive film 19 is grounded. I have.
• the fixed conductor 10 for the main circuit contact as the main circuit conductor is hermetically fixed to the vacuum vessel 1 so as to penetrate the flange 4 a and the insulating resin 5. And fixed conductor
• the end extending into the vacuum vessel 1 of 10 constitutes the fixed contact 8 a of the main circuit contact 8, and the end extending out of the vacuum vessel 1 is connected to the main bus 6.
• the movable rod 14 is airtightly sealed to the flange 4 b via the bellows 16, coaxial with the fixed conductor 10, and is fixed.
• the movable conductor for main circuit contact 11 is coaxially fixed to an end of the movable opening 14 extending into the vacuum vessel 1 via an insulating rod 15.
• the end of the movable conductor 11 facing the fixed contact 8 a forms a movable contact 8 b of the main circuit contact 8.
• the fixed conductor 12 for the ground contact as the main circuit conductor is hermetically fixed to the vacuum vessel 1 so as to penetrate the flange 4 c and the insulating resin 5. And fixed conductor 1
• the end extending into the vacuum vessel 1 of 2 constitutes the fixed contact 9a of the ground contact 9, and the end extending outside the vacuum vessel 1 is connected to the power transmission cable ⁇ .
• the movable conductor 13 for the ground contact as the ground conductor is airtightly sealed to the fixed conductor 1 via the bellows 17 on the flange 4 d.
• the fixed conductor 1 is attached to the vacuum vessel 1 so as to be reciprocable along the axial direction of the fixed conductor 12.
• the end of the movable conductor 13 extending into the vacuum vessel 1 constitutes the movable contact 9 b of the ground contact 9.
• the movable conductor 11 for the main circuit contact and the fixed conductor 12 for the ground contact are made of a first flexible conductor 1 made of, for example, a copper thin plate.
• grounding / testing terminal 21 Formed in a cylindrical shape so as to surround the periphery, and constitute an insulating barrier 20. Further, the grounding / testing terminal 21 has one end extending into the insulating barrier 20. It is molded integrally with the insulating resin 5. The extension of the grounding / testing terminal 21 in the insulation barrier 20 is electrically connected to the movable conductor 13 via a second flexible conductor 22 as a flexible conductor made of, for example, a copper thin plate. The grounding conductor 27 is connected to the other end of the grounding / testing terminal 21 (the grounding / testing terminal 21 is grounded). In addition, the grounding / testing terminal 21 is disposed apart from the conductive film 19.
• the movable opening 14 is connected to the main circuit contact opening / closing operation mechanism 23 via a link mechanism (not shown), and the movable conductor 13 for the ground contact is grounded via the link mechanism (not shown). It is connected to the contact opening / closing operation mechanism 24.
• An insulating rod 25 as an insulating member is interposed between the movable conductor 13 and the operating rod 24a of the ground contact opening / closing operation mechanism 24. Electrical insulation is secured.
• the main circuit contact opening / closing operation mechanism 23 and the ground contact opening / closing operation mechanism 24 are housed in a grounded metal frame 26.
• a shield 29 is provided so as to surround the main circuit contact point 8 to prevent the inside of the tank 2 from being contaminated by metal vapor generated by the arc.
• the flanges 4a and 4c are joined to the tank 2 via insulating members 3a and 3c, respectively, and the fixed conductors 10 for the main circuit contact and the fixed conductors 12 for the ground contact are adjusted to position the flange 4a. a, 4c joint each.
• the movable conductor 11 for the main circuit contact and the movable rod 14 are connected via the insulating rod 15.
• the flange 4b is joined to the nozzle 2 via the insulating member 3b.
• the movable conductor 11 is inserted into the tank 2, the movable conductor 11 is connected to the fixed conductor 12 by the first flexible conductor 18, and then the position of the movable conductor 11 is adjusted, and the movable rod 1 is adjusted.
• 4 is joined to flange 4 b via a through hole 16.
• the flange 4d is joined to the tank 2 via an insulating member 3d.
• the assembly and the grounding / testing terminal 21 are positioned and arranged in a mold, and the insulating resin 5 integrally molds the assembly and the grounding / testing terminal 21.
• the mold body is subjected to a conductive treatment to form a conductive film 19 on the surface of the insulating resin 5.
• the movable conductor for ground contact 13 is inserted into the tank 2 from the flange 4d. After adjusting the position of the movable conductor 13, the movable conductor 13 is joined to the flange 4 d via the bellows 17 in a vacuum atmosphere. Then, the movable conductor 13 and the grounding / testing terminal 21 are connected by the second flexible conductor 22 to obtain the switch gear shown in FIG.
• the main circuit contact opening / closing operation mechanism 23 is operated to move the movable port 14 downward in FIG. 1, and the movable contact 8b is brought into contact with the fixed contact 8a to make the main circuit contact. 8 is closed.
• the movable contact 13 is moved upward in FIG. 1 by operating the ground contact opening / closing operation mechanism 24, and the movable contact 9b is separated from the fixed contact 9a to open the ground contact 9. Therefore, the main bus 6 is connected to the power transmission cable 7 via the fixed conductor 10, the movable conductor 11, the first flexible conductor 18 and the fixed conductor 12, as shown in FIG.
• the power supply from the main bus 6 is distributed to various load devices via the power transmission cable 7. At this time, electrical insulation between the main circuit and the vacuum vessel 1 is ensured by the insulating members 3a and 3c, electrical insulation between the ground is provided by the insulating members 3b and 3d, and the tank 2 is It has an intermediate potential.
• the main circuit contact opening / closing operation mechanism 23 is operated to move the movable rod 14 upward in FIG. 1, and the main circuit contact 8 is opened by moving the movable contact 8b away from the fixed contact 8a. are doing.
• the ground contact opening / closing operation mechanism 24 is operated to move the movable conductor 13 downward in FIG. 1, and the movable contact 9 b is brought into contact with the fixed contact 9 a to close the ground contact 9. I have.
• the grounding / testing terminal 21 is disposed outside the vacuum vessel 1, and the grounding contact side movable conductor 13 and the grounding / testing terminal 21 are connected to the vacuum capacity. Since the connection is made by the second flexible conductor 22 outside the vessel 1, the structure inside the vacuum vessel 1 is simplified, reliability is improved, and the space inside the tank 2 is reduced. Therefore, miniaturization can be achieved and cost can be reduced. Furthermore, since the connection work between the grounding contact side movable conductor 13 and the grounding / testing terminal 21 is performed outside the vacuum vessel 1 which is easy to work, productivity is improved and cost is reduced accordingly. .
• the flange 4 d is connected to the tank 2 via the insulating member 3 d, the tank 2 has an intermediate potential, and in the vacuum vessel 1, the grounding portion is only the movable conductor 13 on the ground contact side, and the grounding portion Is minimized. Therefore, the flange 4d is connected to the tank 2 via the insulating member 3d.
• the movable contact 9b of the ground contact 9 can be arranged with a sufficient distance from the main circuit contact 8 that generates an arc, and the influence of the arc can be reduced.
• the grounding / testing terminal 21 is molded integrally with the tank 2 with the insulating resin 5, and the insulation and rear 20 are molded as a part of the insulating resin 5 at the time of molding. This eliminates the need for assembling the terminal 21 and the insulating barrier 20, thereby reducing costs.
• the extension of the ground contact side movable conductor 13 from the vacuum vessel 1 is surrounded by the insulating barrier 20 and housed in the frame 26, so that the size can be reduced.
• the other end of the ground contact side movable electrode 13 extends outside the vacuum vessel 1, but during normal operation, the movable electrode 13 is at the ground potential, and the voltage is applied to the movable electrode 13. Since the voltage is applied only at the time of inspection, it does not reduce the reliability and safety as compared with the conventional technology in which all components are arranged inside the container.
• the insulating barrier 20 is formed in a cylindrical shape.
• the shape of the insulating barrier is not limited to a cylindrical shape. It only needs to surround the connection portion between the two flexible conductors 22 and may be formed, for example, in a hexagonal or square cylindrical shape.
• FIG. 3 is a diagram schematically showing a main part of a switch gear according to Embodiment 2 of the present invention.
• FIG. 3 (a) is a top view thereof
• FIG. 3 (b) is a side sectional view thereof.
• the grounding / testing terminal 30 has a ring-shaped connecting portion 30a formed at one end thereof, and has insulation so that the grounding contact side movable conductor 13 can be inserted into the opening of the connecting portion 30a. Molded with resin 5.
• the second flexible conductor 40 as a flexible conductor is formed by bending a short flexible copper thin plate into a U-shape, and then bending both ends outwardly, and further opening at the center of the U-shape. It is formed by drilling. Then, the second flexible conductor 40 is connected to the ground contact side movable conductor 13 by inserting the movable conductor 13 into the opening, and both ends are connected to the connection part 30a by mouth. Then, the movable conductor 13 is opened at the opening. It can be attached by attaching to the mouth.
• the other configuration is the same as that of the first embodiment.
• the arrangement of the second flexible conductor 40 can be freely changed. It can. That is, since the connecting portion 30a is arranged so as to surround the ground contact side movable conductor 13, any position where the second flexible conductor 40 is rotated around the axis of the movable conductor 13 is used as the center. However, the second flexible conductor 40 can be connected to the connection portion 30a. Therefore, the second flexible conductor 40 can be mounted in a different arrangement according to the position of the frame 26, and the insulation distance from the frame 26 can be ensured.
• Embodiment 3 Embodiment 3.
• FIG. 4 is a side sectional view schematically showing a main part of a switch gear according to Embodiment 3 of the present invention.
• a grounding / testing terminal 31 has a bottomed cylindrical connection part 31a formed at one end thereof, and a grounding contact side movable conductor 1 is formed at an opening formed in the center of the bottom of the connection part 31a. Molded with insulating resin 5 so that 3 is inserted. A ring 41 as an elastic member made of insulating rubber is interposed between the inner peripheral wall surface of the connection portion 31a and the outer peripheral wall surface of the flange 4d.
• the other configuration is the same as that of the second embodiment.
• the ring 41 is connected. It is interposed between the inner wall surface of 31a and the outer wall surface of flange 4d, and is then integrally molded with insulating resin 5.
• the space between the insulating rod 25 and the insulating barrier 20 is sealed by a stretchable insulating member 42 made of insulating rubber.
• the other configuration is the same as that of the first embodiment.
• the space between the insulating opening 25 and the insulating barrier 20 is sealed by the self-contained insulating member 42, so that the insulation resistance can be improved. At the same time, it is possible to suppress a decrease in the creepage dielectric strength of the insulator caused by the portion being contaminated by foreign matter or the like in the air.
• FIG. 6 is a view schematically showing a main part of a switch gear according to a fifth embodiment of the present invention.
• FIG. 6 (a) is a top view thereof
• FIG. 6 (b) is a side sectional view thereof.
• connection terminal 43 is formed in a U-shape and arranged so as to be orthogonal to the axial direction of the ground contact movable conductor 13, and one end thereof is connected to the other end of the ground contact movable conductor 13. Have been. Then, the second flexible conductor 22 is connected to the other end of the connection terminal 43.
• the other configuration is the same as that of the first embodiment.
• the flange portion 44a extends to the insulating rear 20 side over the entire periphery of the insulating rod 44 as an insulating member.
• the flange 44 a is formed with an inner diameter larger than the outer diameter of the insulating barrier 20. Then, when the ground contact 9 is closed, the flange 44 a is overlapped with the front end of the insulating barrier 20 in the axial direction of the ground contact side movable conductor 13 when the grounding contact 9 is closed. It is arranged to overlap.
• the other configuration is the same as that of the second embodiment.
• the insulation resistance can be improved, and the portion is contaminated by foreign matters in the air.
• the present invention may be applied to a switch gear having a multi-phase structure. Needless to say.
• the main circuit contacts and the ground contacts for multiple phases may be accommodated in the vacuum vessel 1.
• the main circuit contacts including the fixed side and the movable side are provided in the vacuum vessel, and the main circuit conductors respectively connected to these two contacts are connected to the vacuum vessel.
• the vacuum vessel is grounded and the grounding / testing terminal is insulated from the vacuum vessel, it is not necessary to newly provide a pushing or the like, and the configuration is simplified.
• grounding / testing terminal and the other end of the grounding conductor are connected by a flexible conductor, and a connecting portion between the grounding conductor and the flexible conductor is surrounded by a cylindrical insulating barrier. The insulation distance from the grounding part is reduced, and the device can be made compact.
• the vacuum vessel is formed by molding a metal tank with an insulating resin, and the grounding / testing terminal is insulated from the tank and integrally molded with the tank with the insulating resin, The need for assembling the grounding and testing terminals is eliminated, and productivity can be improved.
• one end of the grounding / testing terminal is formed in a ring shape surrounding the grounding conductor, and the flexible conductor is connected to one end of the ring-shaped grounding / testing terminal.
• the degree of freedom in arranging the conductors is increased, and the insulation distance to the frame accommodating the operation mechanism can be secured.
• the grounding conductor penetrates through the bottom of a bottomed cylindrical flange insulated and fixed to the tank, and is airtightly and elastically attached.
• One end of the grounding / testing terminal is connected to the flange.
• a ring-shaped insulating elastic member is interposed between one end of the ring-shaped grounding / testing terminal and the flange, so that the components of the vacuum vessel are grounded.
• the insulating member and the insulating barrier are tightly closed by a stretchable insulating member, the creepage insulation strength due to contamination of the aerial insulating portion and adhesion of foreign matter is reduced. Reduction is suppressed.
• connection terminal is attached so that one end is connected to the other end of the ground conductor and is orthogonal to the axial direction of the ground conductor, and the flexible conductor is connected to the other end of the connection terminal. Therefore, the electromagnetic force generated at the connection terminal when a short-circuit current flows acts so as to cancel the electromagnetic repulsion acting on the ground conductor so as to form the ground contact, thereby preventing the formation of the ground contact. it can.
• a flange portion extends to the insulated nore side over the entire periphery of the edge of the insulated member, and is formed with an inner diameter larger than an outer diameter of the insulated barrier.

Landscapes

• High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
• Gas-Insulated Switchgears (AREA)
• Switch Cases, Indication, And Locking (AREA)

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Publications (1)

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Citations (2)

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• 1999
  • 1999-11-10 JP JP31938599A patent/JP3577247B2/ja not_active Expired - Fee Related
• 2000
  • 2000-06-05 KR KR10-2001-7008534A patent/KR100447050B1/ko not_active IP Right Cessation
  • 2000-06-05 WO PCT/JP2000/003646 patent/WO2001035431A1/ja active Application Filing
  • 2000-06-05 CN CNB008026173A patent/CN1193394C/zh not_active Expired - Fee Related
  • 2000-06-05 EP EP00931702A patent/EP1152444B1/en not_active Expired - Lifetime
  • 2000-06-09 TW TW089111233A patent/TW480799B/zh not_active IP Right Cessation
• 2002
  • 2002-05-23 HK HK02103866.3A patent/HK1042161B/zh not_active IP Right Cessation

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