WO2023053191A1 - タンク型遮断器 - Google Patents

タンク型遮断器 Download PDF

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Publication number
WO2023053191A1
WO2023053191A1 PCT/JP2021/035612 JP2021035612W WO2023053191A1 WO 2023053191 A1 WO2023053191 A1 WO 2023053191A1 JP 2021035612 W JP2021035612 W JP 2021035612W WO 2023053191 A1 WO2023053191 A1 WO 2023053191A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed
outer conductor
tank
movable
side outer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/035612
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
基宗 佐藤
泰規 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to US18/681,970 priority Critical patent/US20240339818A1/en
Priority to PCT/JP2021/035612 priority patent/WO2023053191A1/ja
Priority to JP2022506706A priority patent/JP7090825B1/ja
Priority to EP21959242.5A priority patent/EP4412011B1/en
Publication of WO2023053191A1 publication Critical patent/WO2023053191A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
    • 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
    • H01H33/02—Details
    • H01H33/025—Terminal arrangements
    • 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
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • 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
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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
    • H01H2033/6665—Details concerning the mounting or supporting of the individual vacuum bottles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0358—Connections to in or out conductors

Definitions

  • the present disclosure relates to a tank circuit breaker having an arc extinguishing chamber.
  • Tank-type circuit breakers such as vacuum circuit breakers and gas circuit breakers contain an arc extinguishing chamber for current interruption in the ground tank.
  • the arc-extinguishing chamber is supported in the grounding tank by support insulators at two points, the side on which the movable side contacts are arranged and the side on which the fixed side contacts are arranged.
  • the structure and assembly of the support part using the insulator becomes complicated and the size of the tank-type circuit breaker increases due to the arrangement of the support insulator. Therefore, it is desired to support the arc extinguishing chamber in the ground tank while suppressing the increase in size of the tank circuit breaker.
  • the fixed side of the arc extinguishing chamber is suspended and supported by a bushing conductor, thereby suppressing an increase in the size of the tank-type circuit breaker.
  • the present disclosure has been made in view of the above, and an object thereof is to obtain a tank-type circuit breaker that can prevent damage to fastening portions of parts with a small device configuration.
  • the tank-type circuit breaker of the present disclosure includes a cylindrical grounding tank in which insulating gas is sealed; , a movable conductor electrically connected to the movable contact, and a fixed conductor electrically connected to the fixed contact.
  • the tank-type circuit breaker of the present disclosure includes a movable-side outer conductor and a fixed-side outer conductor arranged in a pair of bushings extending above the grounding tank, and a lower end of the movable-side outer conductor electrically connected to the movable conductor.
  • a fixed-side frame for electrically connecting the lower end of the fixed-side outer conductor to the fixed conductor; and a movable-side insulating support cylinder for insulatingly supporting the movable-side frame to the ground tank.
  • the fixed-side frame and the fixed-side outer conductor are connected via at least two elastic members arranged in series along the extending direction of the fixed-side outer conductor, thereby connecting the fixed-side frame to the fixed-side outer conductor. Suspended support.
  • the tank-type circuit breaker according to the present disclosure has the effect of being able to prevent damage to the fastening portions of parts with a small device configuration.
  • FIG. 1 shows a configuration of a tank-type circuit breaker according to Embodiment 1
  • FIG. 2 is a diagram showing a configuration of a holding portion included in the tank circuit breaker according to Embodiment 1; The figure which shows the structure of the holding
  • a tank-type circuit breaker according to an embodiment of the present disclosure will be described in detail below based on the drawings.
  • FIG. 1 is a diagram showing the configuration of a tank circuit breaker according to Embodiment 1.
  • FIG. 2 is a diagram showing a configuration of a holding portion included in the tank circuit breaker according to Embodiment 1.
  • FIG. 1 a case where the tank circuit breaker 100 is a vacuum circuit breaker will be described, but the tank circuit breaker 100 may be a circuit breaker other than a vacuum circuit breaker such as a gas circuit breaker or an air circuit breaker. may
  • a tank-type circuit breaker 100 includes a cylindrical grounding tank 1 sealed with an insulating gas, and is insulated and supported in the grounding tank 1, and has a movable side contact 5a and a fixed side contact 5a. a contact portion having 5b.
  • the contact portion is the vacuum valve 4 .
  • the arc-extinguishing chamber movable side is located on the left side of the movable contact 5a and the movable side contact 5a
  • the arc-extinguishing chamber fixed side is located on the right side of the fixed side contact 5b and the fixed side contact 5b.
  • the tank-type circuit breaker 100 includes a movable conductor 20a electrically connected to the movable contact 5a, a fixed conductor 20b electrically connected to the fixed contact 5b, and a ground tank 1 extending upwardly. and a pair of bushings.
  • a pair of bushings are connected to a movable side branch pipe 22a and a fixed side branch pipe 22b of the ground tank 1 .
  • a movable-side external conductor 21a is arranged in the movable-side branch pipe 22a, and a fixed-side external conductor 21b is arranged in the fixed-side branch pipe 22b.
  • the movable-side outer conductor 21a and the fixed-side outer conductor 21b are bushing conductors.
  • the tank-type circuit breaker 100 also includes a movable frame 13 that electrically connects the lower end of the movable outer conductor 21a to the movable conductor 20a, and a fixed outer conductor 21b that electrically connects the lower end of the fixed outer conductor 21b to the fixed conductor 20b.
  • the movable-side frame 13 is electrically connected to the movable-side contact 5a through the movable conductor 20a.
  • the stationary frame 14 is electrically connected to the stationary contact 5b via a stationary conductor 20b.
  • the tank-type circuit breaker 100 also includes an insulating operation rod 12 connected to an operating device 10 outside the ground tank 1 to operate the movable-side contact 5a, and a movable-side frame 13 that insulates and supports the ground tank 1.
  • An insulating support cylinder 9 is provided.
  • the stationary frame 14 is suspended and supported by the stationary outer conductor 21b. Therefore, the tank-type circuit breaker 100 does not include a fixed-side insulating support tube that insulates and supports the fixed-side frame 14 on the ground tank 1 . In this manner, the tank-type circuit breaker 100 is miniaturized without a fixed-side insulating support tube.
  • the movable-side end of the grounding tank 1 is covered with a movable-side flange 2a formed with a hole through which the movable-side insulating support cylinder 9 penetrates.
  • the fixed-side end of the ground tank 1 is covered with a fixed-side flange 2b.
  • Arc-extinguishing chamber 3 connecting movable-side insulating support cylinder 9 , movable-side frame 13 , vacuum valve 4 , and fixed-side frame 14 is housed in grounding tank 1 .
  • the vacuum valve 4 is fixed to the stationary frame 14 with bolts 23 .
  • the vacuum valve 4 is fixed to the movable frame 13 with bolts (not shown).
  • the driving force of the operating device 10 is transmitted to the movable side contact 5a via the connecting mechanism 11, the insulating operating rod 12, and the movable conductor 20a.
  • the tank-type circuit breaker 100 has a closing state in which the movable side contact 5a and the fixed side contact 5b are brought into contact with each other by receiving the driving force of the operating device 10, and a breaking state in which the movable side contact 5a and the fixed side contact 5b are separated from each other. can take
  • the contact pressure spring 8 applies a force to the insulating operating rod 12 to press the movable side contact 5a against the fixed side contact 5b when closing. Therefore, the energization performance between the movable side contact 5a and the fixed side contact 5b is ensured when the contact is closed.
  • the arc-extinguishing chamber 3 is supported inside the grounding tank 1 using the holding portion 41 arranged on the fixed side. That is, the movable-side insulating support cylinder 9 is fixed to the movable-side flange 2a, and the fixed-side frame 14 is fixed to the fixed-side outer conductor 21b using the holding portion 41, so that the arc-extinguishing chamber 3 is connected to the ground tank 1. Insulated support inside. That is, the arc extinguishing chamber 3 is fixed to the ground tank 1 at two points, the fixed side and the movable side.
  • the arc extinguishing chamber 3 including the vacuum valve 4 is inserted into the grounding tank 1, and then the fixed side outer conductor is attached to the fixed side frame 14 attached to the fixed side of the vacuum valve 4. 21b is inserted. Then, the fixed-side outer conductor 21 b is fixed to the fixed-side frame 14 .
  • the holding portion 41 has a stationary frame 14, springs 18A and 18B that are elastic members, a current-carrying contact 19, a threaded rod 15, a nut 17, and a restraining plate 16.
  • Springs 18A and 18B are coil springs, disc springs, or the like.
  • the springs 18A and 18B may be any springs that, when compressed, generate a reaction force in a direction opposite to the direction in which they were compressed.
  • the stationary frame 14 extends toward the stationary flange 2b along the axial direction of the stationary conductor 20b and extends toward the stationary outer conductor 21b along the axial direction of the stationary outer conductor 21b.
  • the fixed-side frame 14 has a member extending along the axial direction of the fixed conductor 20b fixed to the fixed conductor 20b, and a member extending along the axial direction of the fixed-side outer conductor 21b (hereinafter referred to as , frame 14P) is connected to the fixed-side outer conductor 21b.
  • a frame 14P of the fixed-side frame 14 is a portion used for connection with the fixed-side external conductor 21b.
  • the axial direction of the fixed-side outer conductor 21b will be referred to as the holding axial direction.
  • the holding axis direction may be a vertical direction or a direction inclined from the vertical direction.
  • the outer wall surface of the fixed-side outer conductor 21b and the inner wall surface of the frame 14P are connected via the current-carrying contact 19.
  • the frame 14P is movably connected to the fixed-side outer conductor 21b via the current-carrying contact 19.
  • the lower end of the fixed-side outer conductor 21b is axially inserted into the tubular region of the frame 14P and movably connected to the frame 14P via the current-carrying contact 19.
  • the current-carrying contact 19 electrically connects the fixed-side frame 14 and the fixed-side external conductor 21b while allowing the frame 14P to move in the holding-axis direction and the fixed-side external conductor 21b to move in the holding-axis direction. Connected. In other words, the current-carrying contact 19 maintains the electrical connection between the fixed-side outer conductor 21b and the fixed-side frame 14 even if the relative positions of the fixed-side outer conductor 21b and the frame 14P are shifted in the holding axis direction.
  • the current-carrying contact 19 is also called a multi-contact, a tulip contact, or a spring contact.
  • the frame 14P has a cylindrical shape, and the lower end of the rod-shaped fixed-side external conductor 21b is inserted into the upper side. That is, the lower end portion of the fixed-side external conductor 21b is arranged in the upper step portion inside the frame 14P.
  • a middle step portion 61A inside the frame 14P is a columnar space in which a spring 18A is arranged.
  • the spring 18A is housed in the intermediate stage portion 61A so that the axial direction is the same as the holding axis direction.
  • the lower part 61B inside the frame 14P is a columnar space in which the spring 18B is arranged.
  • the spring 18B is stored in the lower stage portion 61B so that the axial direction is the same as the holding axis direction.
  • the springs 18A, 18B are arranged in series along the axial direction of the fixed-side outer conductor 21b. That is, the springs 18A and 18B are arranged in series along the direction in which the fixed-side outer conductor 21b extends from the lower end side of the fixed-side outer conductor 21b.
  • the lower part 61B may be a region below the frame 14P.
  • the lower part 61B is the inner area of the stationary frame 14.
  • the spring 18A is the first elastic member and the spring 18B is the second elastic member.
  • a plate-like convex portion 62 is formed between the middle portion 61A and the lower portion 61B.
  • the convex portion 62 has an annular shape.
  • the convex portion 62 is formed so as to protrude toward the center from the inner wall surface forming the tubular region of the frame 14P. That is, the convex portion 62 extends from the inner wall surface of the frame 14P toward the central portion (central axis) of the cylindrical region of the frame 14P.
  • a central region of the annular projection 62 is a disk-shaped space through which the threaded rod 15 made of a rod-shaped member is passed. The convex portion 62 prevents the springs 18A and 18B from colliding.
  • the upper surface of the convex portion 62 (on the side of the fixed-side outer conductor 21b) faces the bottom surface of the fixed-side outer conductor 21b, and the bottom surface of the convex portion 62 faces the upper surface of the restraining plate 16.
  • the top surface of the protrusion 62 is parallel to the bottom surface of the fixed-side outer conductor 21 b , and the bottom surface of the protrusion 62 is parallel to the top surface of the pressing plate 16 .
  • the bottom side of the spring 18A is pressed against the upper surface of the projection 62.
  • the bottom surface of the projection 62 is pressed against the upper side of the spring 18B.
  • the upper side of the spring 18A is pressed against the lower end (bottom surface) of the fixed-side outer conductor 21b.
  • the bottom side of the spring 18B is pressed against the upper surface of the holding plate 16, which is an annular plate-shaped member.
  • the convex portion 62 is an annular portion.
  • the holding plate 16 is fixed to the lower end of the fixed-side outer conductor 21b with a screw rod 15 and a nut 17 so that the upper surface of the holding plate 16 is parallel to the bottom surface of the fixed-side outer conductor 21b.
  • a screw hole is provided in the bottom portion of the fixed-side outer conductor 21b along the holding axis direction, and a screw hole is provided in the center portion of the restraining plate 16 along the holding axis direction. Both ends of the threaded rod 15 are provided with thread grooves.
  • the threaded rod 15 is fixed to the fixed-side outer conductor 21b by screwing one thread groove into the bottom portion of the fixed-side outer conductor 21b.
  • the threaded rod 15 is fixed to the pressing plate 16 by having the other thread groove pass through the pressing plate 16 and be screwed to the nut 17 .
  • the threaded rod 15 is fixed to the fixed-side outer conductor 21b while extending in the axial direction of the fixed-side outer conductor 21b, that is, in the extending direction of the fixed-side outer conductor 21b.
  • the threaded rod 15 is fixed to the fixed-side outer conductor 21b with the spring 18A stored in the middle step portion 61A and the spring 18B stored in the lower step portion 61B.
  • the tip of the screw groove on the side of the threaded rod 15 for fixing the restraining plate 16 protrudes from the bottom surface of the restraining plate 16, and the nut 17 is screwed into this projecting portion.
  • the fixed-side outer conductor 21b and the pressing plate 16 are fixed by the screw rod 15 and the nut 17, and the relative position between the fixed-side outer conductor 21b and the pressing plate 16 does not change.
  • the convex portion 62 is fixed to the frame 14P, and the relative position between the convex portion 62 and the frame 14P does not change. The relative position in the holding axis direction between the frame 14P and the fixed-side outer conductor 21b can be changed.
  • the vibration propagates to the frame 14P, and the frame 14P vibrates in the holding axis direction. As a result, the frame 14P moves upward and downward along the holding axis direction.
  • the temperature of the fixed-side outer conductor 21b increases when the tank-type circuit breaker 100 is energized, the length of the fixed-side outer conductor 21b in the holding axis direction increases, and when the temperature of the fixed-side outer conductor 21b decreases, the fixed-side The length of the outer conductor 21b in the holding axis direction is restored.
  • the frame 14P moves upward along the holding axis direction.
  • the projection 62 also moves upward.
  • the convex portion 62 contracts the spring 18A.
  • the spring 18A restrains the upward displacement of the frame 14P when the frame 14P tries to move upward along the holding axis direction. That is, when the spring 18A is pushed by the protrusion 62, the spring 18A pushes back the protrusion 62 downward by a reaction force. That is, the spring 18A pushes back the frame 14P downward when the frame 14P moves upward.
  • the frame 14P moves downward along the holding axis direction.
  • the projection 62 also moves downward.
  • the convex portion 62 contracts the spring 18B.
  • the spring 18B restrains the downward displacement of the frame 14P when the frame 14P tries to move downward along the holding axis direction. That is, when the spring 18B is pushed by the protrusion 62, the spring 18B pushes back the protrusion 62 upward due to the reaction force. That is, the spring 18B pushes back the frame 14P upward when the frame 14P moves downward.
  • the fixed-side outer conductor 21b when the temperature of the fixed-side outer conductor 21b rises, the fixed-side outer conductor 21b extends downward with respect to the frame 14P.
  • the fixed-side outer conductor 21b contracts the spring 18A.
  • the spring 18A suppresses downward displacement of the fixed-side outer conductor 21b when the fixed-side outer conductor 21b tries to move downward. That is, when the spring 18A is pushed by the fixed-side outer conductor 21b, the reaction force pushes the fixed-side outer conductor 21b upward.
  • the stationary frame 14 and the stationary outer conductor 21b are in mechanical contact via at least two springs (springs 18A and 18B).
  • the springs 18A and 18B are capable of suppressing vibration components in both directions. , and the vibration of the arc extinguishing chamber 3 can be suppressed.
  • the spring constants of the springs 18A and 18B can be appropriately set. , the compression of the springs 18A and 18B can absorb the elongation of the fixed-side outer conductor 21b.
  • the springs 18A and 18B can reduce the load acting on the fastening portions of the parts that constitute the arc-extinguishing chamber 3 and the holding part 41, thereby preventing damage to these parts.
  • the tank-type circuit breaker 100 there is no need to provide a fixed-side support insulator between the arc-extinguishing chamber 3 and the grounding tank 1, and the heavy arc-extinguishing chamber 3 is supported by the fixed-side outer conductor 21b. Therefore, the tank-type circuit breaker 100 has a small device configuration.
  • the tank-type circuit breaker of the comparative example will be explained.
  • an object having a specific mass is attached to the tip of the bushing.
  • the tank-type circuit breaker of the first comparative example suppresses the vibration of the entire equipment by the vibration of this object.
  • tank-type circuit breaker of the second comparative example an object having a specific mass is attached via an elastic element to the base on which the tank-type circuit breaker is installed.
  • the tank-type circuit breaker of the second comparative example suppresses the vibration of the entire equipment by the vibration of this object.
  • the tank-type circuit breakers of these first and second comparative examples are seismically isolated by attaching a vibrating object.
  • the vibration of the arc-extinguishing chamber in the grounding tank cannot be suppressed, and the fastening portions of the parts constituting the arc-extinguishing chamber cannot be prevented from being damaged.
  • the tank-type circuit breaker 100 may have an elastic member other than the springs 18A and 18B.
  • rubber may be arranged in the tank circuit breaker 100 instead of the springs 18A, 18B.
  • the fixed-side frame 14 and the fixed-side outer conductor 21b are connected via at least two elastic members arranged in series along the extending direction of the fixed-side outer conductor 21b.
  • the fixed-side frame 14 is suspended and supported by the fixed-side outer conductor 21b. Therefore, the tank circuit breaker 100 can prevent the fastening portion of the component from being damaged with a small device configuration.
  • Embodiment 2 Next, Embodiment 2 will be described with reference to FIG.
  • an annular plate-like member is joined to frame 14P instead of convex portion 62. As shown in FIG.
  • FIG. 3 is a diagram showing the configuration of a holding portion included in a tank-type circuit breaker according to Embodiment 2.
  • FIG. 3 constituent elements that achieve the same functions as those of the holding portion 41 provided in the tank-type circuit breaker 100 according to the first embodiment shown in FIG. do.
  • the arc-extinguishing chamber 3 is supported within the grounding tank 1 using the holding portion 42 arranged on the fixed side.
  • the holding portion 42 includes the stationary frame 14 (the frame 14P is shown in FIG. 3), springs 18A and 18B that are elastic members, current-carrying contacts 19, bolts 26 and 28, an upper plate 31, and an intermediate plate. 32 and a bottom plate 33 .
  • the bottom surface of the top plate 31 faces the top surface of the intermediate plate 32
  • the bottom surface of the intermediate plate 32 faces the top surface of the bottom plate 33 .
  • the bottom surface of the top plate 31 is parallel to the top surface of the intermediate plate 32
  • the bottom surface of the intermediate plate 32 is parallel to the top surface of the bottom plate 33 .
  • the intermediate plate 32 is an annular portion.
  • a plate-shaped intermediate plate 32 is arranged between the middle step portion 61A and the lower step portion 61B.
  • the intermediate plate 32 is composed of an annular plate-like member and is joined to the frame 14P.
  • the top and bottom surfaces of the intermediate plate 32 are parallel to the plane perpendicular to the inner wall surface forming the tubular region of the frame 14P.
  • the inner region of the annular intermediate plate 32 is a disk-shaped space through which the bolt 26 is passed.
  • Intermediate plate 32 prevents springs 18A and 18B from colliding.
  • a plurality of holes for passing the bolts 28 are provided in the outer peripheral portion of the intermediate plate 32 .
  • the frame 14P is provided with a plurality of screw holes extending in a direction parallel to the holding axis direction for fastening the bolts 28 .
  • a bolt 28 is passed through each hole provided in the intermediate plate 32 and each screw hole provided in the frame 14P, and the bolt 28 is screwed into the screw hole of the frame 14P. Thereby, the intermediate plate 32 is fixed to the frame 14P by the bolts 28. As shown in FIG.
  • a hole for passing the bolt 25 is provided in the center of the upper plate 31 .
  • the fixed-side outer conductor 21b is provided with a screw hole extending in the holding axis direction for fastening the bolt 25.
  • a bolt 25 is passed through a hole provided in the upper plate 31 and a screw hole provided in the fixed-side outer conductor 21b, and the bolt 25 is screwed into the screw hole of the fixed-side outer conductor 21b.
  • the upper plate 31 is fixed to the fixed-side outer conductor 21b by the bolts 25.
  • a hole for passing the bolt 26 is provided in the center of the bottom plate 33 . Further, the bolt 25 is provided with a screw hole extending in the holding axis direction for fastening the bolt 26 .
  • a bolt 26 is passed through a hole provided in the bottom plate 33 and a screw hole provided in the bolt 25 , and the bolt 26 is screwed into the screw hole of the bolt 25 . Thereby, the bottom plate 33 is fixed to the bolts 25 by the bolts 26 .
  • the upper plate 31 and the bottom plate 33 are fixed to the fixed-side outer conductor 21b, and the frame 14P is fixed to the intermediate plate 32. Therefore, the relative positions of the fixed-side outer conductor 21b, the top plate 31, and the bottom plate 33 do not change. Also, the relative position between the intermediate plate 32 and the frame 14P does not change. The relative position in the holding axis direction between the frame 14P and the fixed-side outer conductor 21b can be changed.
  • the spring 18A is arranged in the middle part 61A and the spring 18B is arranged in the lower part 61B.
  • the bottom side of the spring 18A is pressed against the upper surface of the intermediate plate 32 (on the side of the fixed-side outer conductor 21b).
  • the bottom surface of the intermediate plate 32 is pressed against the upper side of the spring 18B.
  • the upper side of the spring 18A is pressed against the bottom surface of the upper plate 31.
  • the bottom side of the spring 18B is pressed against the top surface of the bottom plate 33 .
  • the intermediate plate 32 is used instead of the convex part 62 to push the spring 18A from the bottom side of the spring 18A. Further, in the holding portion 42, the intermediate plate 32 is used instead of the convex portion 62 to push the spring 18B from above.
  • the upper plate 31 is used instead of the fixed-side outer conductor 21b to push the spring 18A from above.
  • the bottom plate 33 is used instead of the pressing plate 16 to push the spring 18B from below.
  • the tank-type circuit breaker 100 since the tank-type circuit breaker 100 includes the holding portion 42, even if upward or downward vibration occurs in the arc extinguishing chamber 3 during the opening/closing operation, as in the first embodiment, The springs 18A and 18B generate resistance against the vibration components in both directions, and the vibration of the arc extinguishing chamber 3 can be suppressed.
  • the spring constants of the springs 18A and 18B can be appropriately set. , the compression of the springs 18A and 18B can absorb the elongation of the fixed-side outer conductor 21b.
  • a gap 70 is provided between the upper surface of the upper plate 31 and the surface of the frame 14P facing the upper surface of the upper plate 31 . This gap 70 is provided to avoid collision between the upper plate 31 and the fixed-side outer conductor 21b when the fixed-side outer conductor 21b shrinks due to part tolerance.
  • the tank-type circuit breaker 100 since the tank-type circuit breaker 100 includes the holding portion 42, the tank-type circuit breaker 100 has a small device configuration and the fastening portion of the parts is reduced as in the first embodiment. It can prevent damage.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Gas-Insulated Switchgears (AREA)
PCT/JP2021/035612 2021-09-28 2021-09-28 タンク型遮断器 Ceased WO2023053191A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US18/681,970 US20240339818A1 (en) 2021-09-28 2021-09-28 Tank-type circuit breaker
PCT/JP2021/035612 WO2023053191A1 (ja) 2021-09-28 2021-09-28 タンク型遮断器
JP2022506706A JP7090825B1 (ja) 2021-09-28 2021-09-28 タンク型遮断器
EP21959242.5A EP4412011B1 (en) 2021-09-28 2021-09-28 Tank type circuit-breaker

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EP4412011A1 (en) 2024-08-07
JP7090825B1 (ja) 2022-06-24
US20240339818A1 (en) 2024-10-10
JPWO2023053191A1 (https=) 2023-04-06
EP4412011A4 (en) 2024-11-20
EP4412011B1 (en) 2025-10-15

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