JP2013058312A - Tank-shaped vacuum circuit-breaker - Google Patents

Tank-shaped vacuum circuit-breaker Download PDF

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JP2013058312A
JP2013058312A JP2011194539A JP2011194539A JP2013058312A JP 2013058312 A JP2013058312 A JP 2013058312A JP 2011194539 A JP2011194539 A JP 2011194539A JP 2011194539 A JP2011194539 A JP 2011194539A JP 2013058312 A JP2013058312 A JP 2013058312A
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fixed
movable
tank
conductor
bushing terminal
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JP5796425B2 (en
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Kazuhiro Nagatake
和浩 長竹
Hideki Watanabe
英樹 渡辺
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Meiden T&D Corp
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Meiden T&D Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a tank-shaped vacuum circuit-breaker capable of improving cooling characteristics of vacuum interrupter both end portions in a ground tank, and increasing energizing capacity.SOLUTION: A vacuum circuit-breaker includes: a vacuum interrupter 2; a moving side conductor 23 and a fixed side conductor 24; a moving side contact case 9 and a fixed side contact case 13; a moving side bushing terminal 25 and a fixed side bushing terminal 26; an insulation supporting cylinder 11 and an insulation supporting body 14; and a moving side supporting plate 28 and a fixed side supporting plate 29, in a ground tank 1. The moving side conductor 23 and the moving side contact case 9 are formed so as to be hollow and communicated with each other. The moving side bushing terminal 25 and the moving side supporting plate 28 are provided with ventilation ports 25a and 28a to the outside of the ground tank 1. A ventilation passage, which communicates from the ventilation port 28a of the moving side supporting plate to the atmosphere through the inside of the insulation supporting cylinder 11, the inside of the moving side contact case 9; the inside of the moving side conductor 23, and the ventilation port 25a of the moving side bushing terminal, is formed.

Description

本発明は、電力設備の保護用として、変電所内で使用されている屋外用等のタンク形真空遮断器に関し、特にタンク内の冷却構造に関するものである。   The present invention relates to a tank-type vacuum circuit breaker used outdoors in a substation for protecting electric power equipment, and more particularly to a cooling structure in a tank.

一般に、タンク形真空遮断器においては、絶縁媒体が密閉された接地タンク内に、遮断部を構成する真空インタラプタが収納されている。例えば特許文献１に記載のタンク形真空遮断器は、真空インタラプタの両端に設けられたコンタクトケースにそれぞれ絶縁性の支持物を接続することで、真空インタラプタを接地タンクに固定している。   In general, in a tank-type vacuum circuit breaker, a vacuum interrupter constituting a circuit breaker is housed in a grounded tank in which an insulating medium is sealed. For example, the tank-type vacuum circuit breaker described in Patent Document 1 fixes the vacuum interrupter to the ground tank by connecting insulating supports to contact cases provided at both ends of the vacuum interrupter.

しかしながら上記特許文献１中の図１に記載のタンク形真空遮断器の構成においては、通電時において真空インタラプタの両端に設けられたコンタクトケースの温度上昇が厳しくなるため、真空遮断器の通電容量増加の妨げとなっていた。また、コンタクトケースは絶縁ガスが密閉されたタンク内に配置されているため、タンク内の絶縁ガスが温度平衡状態では絶縁ガスの対流等も期待できず、コンタクトケースを効果的に冷却することができない構成となっていた。   However, in the configuration of the tank-type vacuum circuit breaker shown in FIG. 1 of the above-mentioned Patent Document 1, since the temperature rise of the contact cases provided at both ends of the vacuum interrupter becomes severe during energization, the current carrying capacity of the vacuum circuit breaker increases. It was an obstacle. In addition, since the contact case is arranged in a tank in which the insulating gas is sealed, the insulating gas in the tank cannot be expected to convect the insulating gas when the temperature is in an equilibrium state, and the contact case can be effectively cooled. It was impossible to configure.

特開２００７−３０６７０１号公報JP 2007-306701 A

本発明は上記の課題を解決するために、接地タンク内の真空インタラプタ両端部の冷却効果が高く、真空遮断器の通電容量の増加を可能にしたタンク形真空遮断器の提供を目的とする。   In order to solve the above-described problems, an object of the present invention is to provide a tank-type vacuum circuit breaker that has a high cooling effect at both ends of a vacuum interrupter in a grounded tank and can increase the current-carrying capacity of the vacuum circuit breaker.

上記目的を達成するために本発明は、絶縁媒体を密封した接地タンクと、前記接地タンク内に絶縁支持され、一対の電極を備えた真空インタラプタと、前記タンクの上方に延びた１対のブッシング内に配置された可動側及び固定側導体と、前記可動側導体の下端を前記真空インタラプタの可動側電極に電気的に接続する可動側コンタクトケースと、前記固定側導体の下端を前記真空インタラプタの固定側電極に電気的に接続する固定側コンタクトケースと、前記可動側及び固定側導体の上端とそれぞれ接続する可動側及び固定側ブッシング端子と、前記真空インタラプタの可動側電極を操作するために前記接地タンク外の操作器に接続された絶縁ロッドと、前記真空インタラプタの可動側及び固定側コンタクトケースを前記接地タンクに絶縁支持する絶縁支持筒及び絶縁支持体と、前記接地タンクの一部を形成すると共に、前記絶縁支持筒及び前記絶縁支持体を前記接地タンクに固定するための可動側及び固定側支持板を備えた真空遮断器において、前記可動側導体と前記可動側コンタクトケースを中空に形成して連通させ、さらに前記可動側ブッシング端子及び前記可動側支持板に前記接地タンク外部への通気口部を設け、前記可動側支持板の通気口部から前記絶縁支持筒内、前記可動側コンタクトケース内、前記可動側導体内、前記可動側ブッシング端子の通気口部を経て大気に至る通気路を形成したことを特徴とする。   To achieve the above object, the present invention provides a ground tank in which an insulating medium is sealed, a vacuum interrupter having a pair of electrodes insulated and supported in the ground tank, and a pair of bushings extending above the tank. A movable-side and fixed-side conductor disposed inside, a movable-side contact case that electrically connects a lower end of the movable-side conductor to a movable-side electrode of the vacuum interrupter, and a lower end of the fixed-side conductor of the vacuum interrupter. A stationary contact case electrically connected to the stationary electrode, a movable and stationary bushing terminal connected to the upper ends of the movable and stationary conductors, respectively, and the movable interrupter to operate the movable electrode of the vacuum interrupter. Insulating rod connected to the controller outside the ground tank and the movable and fixed contact cases of the vacuum interrupter are insulated from the ground tank. An insulating support cylinder and an insulating support body to be held, and a movable side and a fixed side support plate for forming a part of the grounding tank and fixing the insulating support cylinder and the insulating support body to the grounding tank are provided. In the vacuum circuit breaker, the movable-side conductor and the movable-side contact case are formed to communicate with each other, and the movable-side bushing terminal and the movable-side support plate are provided with a vent portion to the outside of the ground tank, A vent passage is formed from the vent portion of the movable side support plate to the atmosphere through the insulating support cylinder, the movable contact case, the movable conductor, and the vent portion of the movable bushing terminal. And

好ましくは、前記可動側ブッシング端子及び前記可動側支持板の通気口部に水滴の侵入を阻止するフィルタを設けたことを特徴とする。   Preferably, a filter for preventing intrusion of water droplets is provided at the movable-side bushing terminal and the vent hole portion of the movable-side support plate.

また、前記固定側導体、前記固定側コンタクトケース及び前記絶縁支持体を中空に形成して連通させ、さらに前記固定側ブッシング端子及び前記固定側支持板に前記接地タンク外部への通気口部を設け、前記固定側支持板の通気口部から前記固定側絶縁支持体内、前記固定側コンタクトケース内、前記固定側導体内、前記固定側ブッシング端子の通気口部を経て大気に至る通気路を形成したことを特徴とする。   Further, the fixed-side conductor, the fixed-side contact case, and the insulating support are formed and communicated with each other, and the fixed-side bushing terminal and the fixed-side support plate are provided with a vent hole portion to the outside of the ground tank. The air passage from the fixed side support plate to the atmosphere through the fixed side insulating support, the fixed side contact case, the fixed side conductor, and the fixed side bushing terminal is formed. It is characterized by that.

好ましくは、前記固定側ブッシング端子及び前記固定側支持板の通気口部に水滴の侵入を阻止するフィルタを設けたことを特徴とする。   Preferably, a filter that prevents intrusion of water droplets is provided in the vent portion of the fixed-side bushing terminal and the fixed-side support plate.

本発明のタンク形真空遮断器の請求項１によれば、絶縁支持筒内から可動側コンタクトケース内を介して可動側ブッシング端子に至るまでに接地タンク外部の大気が通る通気路を形成し、該大気を自然対流させることで、高温部となる真空インタラプタの端部を効率よく冷却することができ、ひいては遮断器の通電容量の増加を図ることができる。   According to claim 1 of the tank type vacuum circuit breaker of the present invention, an air passage is formed through which the atmosphere outside the ground tank passes from the inside of the insulating support cylinder to the movable side bushing terminal through the movable side contact case. By natural convection of the atmosphere, it is possible to efficiently cool the end portion of the vacuum interrupter, which is a high temperature portion, and as a result, it is possible to increase the current carrying capacity of the circuit breaker.

また、請求項２によれば、可動側ブッシング端子及び可動側支持板の大気と連通する通気口部にフィルタを設けたので、雨水等が接地タンク内の可動側に形成した通気路に浸入することを防止できる。   According to the second aspect of the present invention, since the filter is provided in the vent portion communicating with the atmosphere of the movable side bushing terminal and the movable side support plate, rainwater or the like enters the vent path formed on the movable side in the ground tank. Can be prevented.

また、請求項３によれば、固定側導体及び絶縁支持体を中空に形成して連通し、絶縁支持体内から前記固定側コンタクトケース内を介して固定側ブッシング端子に至るまでに接地タンク外部の大気が通る通気路を形成し、該大気を自然対流させることで、真空インタラプタの両端部における冷却効果が期待でき、よりいっそう遮断器の通電容量の増加を図ることができる。   According to a third aspect of the present invention, the fixed-side conductor and the insulating support are formed in a hollow shape and communicated with each other, and from the insulating support to the fixed-side bushing terminal through the fixed-side contact case. By forming a ventilation path through which the atmosphere passes and allowing natural convection of the atmosphere, a cooling effect at both ends of the vacuum interrupter can be expected, and the energization capacity of the circuit breaker can be further increased.

さらに、請求項４によれば、固定側導体及び絶縁支持体の大気と連通する通気口部にフィルタを設けたので、雨水等が接地タンク内の固定側に形成した通気路に浸入することを防止できる。   Furthermore, according to the fourth aspect, since the filter is provided in the vent hole portion that communicates with the atmosphere of the fixed-side conductor and the insulating support body, rainwater or the like enters the vent passage formed on the fixed side in the ground tank. Can be prevented.

本発明に係るタンク形真空遮断器を示す正面断面図である。It is front sectional drawing which shows the tank type vacuum circuit breaker which concerns on this invention. 図１の可動側導体部分の拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of a movable side conductor portion of FIG. 1. 図１の取り付け板周辺の拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view around the mounting plate of FIG. 1. 本発明に係るタンク形真空遮断器の他の実施例を示す正面断面図である。It is front sectional drawing which shows the other Example of the tank type vacuum circuit breaker which concerns on this invention.

以下、本発明を適用した実施例につき適宜図面を用いて説明する。図１において、接地タンク１内には０．１５〜０．５ＭＰａ程度の絶縁性の高圧ガスが封入されている。接地タンク１の水平方向の両端には可動側支持板２８、固定側支持板２９が取り付けられており、接地タンク１内を気密に保持している。なお高圧ガスには、例えば乾燥空気、ＳＦ６ガス等を用いることが出来る。 Hereinafter, embodiments to which the present invention is applied will be described with reference to the accompanying drawings. In FIG. 1, an insulating high-pressure gas of about 0.15 to 0.5 MPa is sealed in the ground tank 1. A movable support plate 28 and a fixed support plate 29 are attached to both ends of the ground tank 1 in the horizontal direction, and the inside of the ground tank 1 is kept airtight. For example, dry air or SF 6 gas can be used as the high-pressure gas.

接地タンク１内には真空インタラプタ２が収納されている。真空インタラプタ２の内部には、可動側電極３及び固定側電極４が対向配置されている。さらに、これら可動側及び固定側電極にはそれぞれ、可動リード５、固定リード６が固着されている。   A vacuum interrupter 2 is accommodated in the ground tank 1. Inside the vacuum interrupter 2, a movable side electrode 3 and a fixed side electrode 4 are arranged to face each other. Further, a movable lead 5 and a fixed lead 6 are fixed to the movable side and fixed side electrodes, respectively.

真空インタラプタ２はその両端を可動側端板７及び固定側端板１２によって封止されると共に、可動側端板７と可動リード５との間に、外周側が真空となるベローズ８を設けることで、内部が真空状態に保たれている。   Both ends of the vacuum interrupter 2 are sealed by the movable side end plate 7 and the fixed side end plate 12, and a bellows 8 whose outer peripheral side is vacuum is provided between the movable side end plate 7 and the movable lead 5. The interior is kept in a vacuum state.

可動側端板７は、中空の可動側コンタクトケース９に支持されている。さらに、可動側コンタクトケース９は中空の金属性のサポート１０及び絶縁支持筒１１を介して可動側支持板２８に支持されている。   The movable side end plate 7 is supported by a hollow movable side contact case 9. Further, the movable contact case 9 is supported by the movable support plate 28 via a hollow metallic support 10 and an insulating support cylinder 11.

一方、真空インタラプタ２の固定側端板１２は、固定側コンタクトケース１３及び絶縁支持体１４を介して固定側支持板２９に支持されている。   On the other hand, the fixed-side end plate 12 of the vacuum interrupter 2 is supported by the fixed-side support plate 29 via the fixed-side contact case 13 and the insulating support 14.

可動リード５は、可動側コンタクトケース９に挿通され、リングコンタクト１５を介して可動側コンタクトケース９と電気的に接続される。さらに、可動リード５はサポート１０内および絶縁支持筒内１１を挿通した絶縁ロッド１６と連結されている。絶縁ロッド１６は接地タンク１外部に配置された操作器に接続され、可動側電極３を操作する。なお、リングコンタクト１５にはスリットが切られているため、可動側コンタクトケース９内とサポート１０内は通気状態にある。   The movable lead 5 is inserted into the movable contact case 9 and is electrically connected to the movable contact case 9 via the ring contact 15. Further, the movable lead 5 is connected to an insulating rod 16 inserted through the support 10 and the insulating support cylinder 11. The insulating rod 16 is connected to an operating device arranged outside the ground tank 1 and operates the movable electrode 3. Since the ring contact 15 is slit, the movable contact case 9 and the support 10 are in a vented state.

接地タンク１内の上面には、２つの円筒状のブッシング取付台１７、１８が一体に形成され、ブッシング取付台１７、１８上にブッシング１９、２０がそれぞれ接地タンク１の外方向に傾斜した状態で取り付けられている。また、ブッシング取付台１７、１８の外周にはそれぞれ変流器２１、２２が配置されている。   Two cylindrical bushing mounts 17 and 18 are integrally formed on the upper surface of the ground tank 1, and the bushings 19 and 20 are inclined on the bushing mounts 17 and 18, respectively. It is attached with. Further, current transformers 21 and 22 are arranged on the outer circumferences of the bushing mounts 17 and 18, respectively.

ブッシング１９、２０の内部には可動側導体２３及び固定側導体２４がそれぞれ配置されている。可動側導体２３は中空状となっている。また、ブッシング１９、２０と可動側導体２３、固定側導体２４の間の空間には、接地タンク１内と同等の圧力の絶縁性ガスが封入されている。   A movable side conductor 23 and a fixed side conductor 24 are disposed inside the bushings 19 and 20, respectively. The movable side conductor 23 is hollow. In addition, in the space between the bushings 19, 20 and the movable conductor 23 and the fixed conductor 24, an insulating gas having the same pressure as that in the ground tank 1 is sealed.

可動側導体２３の下端は可動側コンタクトケース９に、上端は可動側ブッシング端子２５にそれぞれ電気的に接続されている。一方、固定側導体２４の下端は固定側コンタクトケース１３に、上端は固定側ブッシング端子２６にそれぞれ電気的に接続されている。また、図２に示すように、可動側ブッシング端子２５の大気と連通する通気口部２５ａにはフィルタ２７を設けている。   The lower end of the movable conductor 23 is electrically connected to the movable contact case 9, and the upper end is electrically connected to the movable bushing terminal 25. On the other hand, the lower end of the fixed-side conductor 24 is electrically connected to the fixed-side contact case 13, and the upper end is electrically connected to the fixed-side bushing terminal 26. Further, as shown in FIG. 2, a filter 27 is provided in the vent portion 25 a that communicates with the atmosphere of the movable-side bushing terminal 25.

このような構成において、真空遮断器の投入時には、可動側ブッシング端子２５、可動側導体２３、可動側コンタクトケース９、リングコンタクト１５、可動リード５、可動側電極３の順に通電経路が形成される。さらに、真空インタラプタ２の固定側の通電経路は、固定側電極４、固定リード６、固定側コンタクトケース１３、固定側導体２４、固定側ブッシング端子２６の順に通電される。   In such a configuration, when the vacuum circuit breaker is turned on, an energization path is formed in the order of the movable side bushing terminal 25, the movable side conductor 23, the movable side contact case 9, the ring contact 15, the movable lead 5, and the movable side electrode 3. . Furthermore, the energization path on the stationary side of the vacuum interrupter 2 is energized in the order of the stationary electrode 4, the stationary lead 6, the stationary side contact case 13, the stationary side conductor 24, and the stationary side bushing terminal 26.

可動側導体２３内、ベローズ８の内周側、可動側コンタクトケース９内、サポート１０内、及び絶縁支持筒１１内は互いに連通されている。さらに絶縁支持筒１１内は、可動側支持板２８の通気口部２８ａに設けられたフィルタ３０を介して、ハウジング（図示せず）内と連通されている。ハウジング内は可動側電極３をはじめとする可動部の操作器系統が配置されるとともに、外部空気が流入可能な大気圧空間となっている。このため、絶縁支持筒１１内より可動側ブッシング端子２５に至る連通部は、接地タンク１外部の大気が流れる通気路となっている。   The movable conductor 23, the inner peripheral side of the bellows 8, the movable contact case 9, the support 10, and the insulating support cylinder 11 are in communication with each other. Further, the inside of the insulating support cylinder 11 communicates with the inside of a housing (not shown) through a filter 30 provided in the vent hole portion 28a of the movable side support plate 28. In the housing, an operating system of movable parts including the movable electrode 3 is arranged, and an atmospheric pressure space into which external air can flow is formed. For this reason, the communication part from the inside of the insulating support cylinder 11 to the movable-side bushing terminal 25 is a ventilation path through which the atmosphere outside the ground tank 1 flows.

具体的には、接地タンク１内部の絶縁性ガスに比べて冷たい、接地タンク１外部の大気が、ハウジング内よりフィルター３０を介して絶縁支持筒１１内に流入し、サポート１０内、可動側コンタクトケース９内を経てベローズ８の内周側の順に流れる。   Specifically, the atmosphere outside the ground tank 1 that is cooler than the insulating gas inside the ground tank 1 flows into the insulating support cylinder 11 through the filter 30 from the inside of the housing, and within the support 10 and the movable contact. It flows in the order of the inner peripheral side of the bellows 8 through the case 9.

可動側コンタクトケース９周辺は温度上昇が厳しく、熱せられた状態にあるので、タンク外部から流入した大気は、可動側コンタクトケース９周囲の熱によって温められる。温められた大気は、可動側導体２３内部を通って上方へと流れ、可動側ブッシング端子２５に設けられた通気口部２５ａより放出される。このときに生じる上昇風により、可動側コンタクトケース９及びその周囲をスムーズに冷却する構成としている。   Since the temperature rise around the movable contact case 9 is severe and is in a heated state, the air flowing from the outside of the tank is warmed by the heat around the movable contact case 9. The warmed air flows upward through the inside of the movable side conductor 23, and is discharged from the vent portion 25 a provided in the movable side bushing terminal 25. The movable contact case 9 and its surroundings are smoothly cooled by the rising air generated at this time.

以上述べたように、本実施例に係るタンク形真空遮断器によれば、絶縁支持筒１１から可動側コンタクトケース９を介して可動側ブッシング端子２５に至るまでに接地タンク１外部の大気が通る通気路を形成し、該大気を自然対流させることで、高温部となる真空インタラプタ２の端部を効率よく冷却することができ、ひいては遮断器の通電容量の増加を図ることができる。   As described above, according to the tank-type vacuum circuit breaker according to this embodiment, the atmosphere outside the ground tank 1 passes from the insulating support cylinder 11 to the movable-side bushing terminal 25 through the movable-side contact case 9. By forming a ventilation path and allowing natural convection of the atmosphere, the end portion of the vacuum interrupter 2 that is a high temperature portion can be efficiently cooled, and as a result, the current carrying capacity of the circuit breaker can be increased.

また、可動側ブッシング端子２５の通気口部２５ａにフィルタ２７を、可動側支持板２８の通気口部２８ａにフィルタ３０をそれぞれ設けたので、雨水等が接地タンク１内の可動側に形成した通気路に浸入することを防止できる。   Further, since the filter 27 is provided in the vent portion 25a of the movable-side bushing terminal 25, and the filter 30 is provided in the vent portion 28a of the movable-side support plate 28, rainwater or the like is formed on the movable side in the ground tank 1. Intrusion into the road can be prevented.

次に本発明の他の実施例につき図４に基づき説明する。なお、実施例１と同様の構成については、同一の符号を付し、説明は省略する。   Next, another embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

本実施例では、図４に示すように、固定側導体２４、固定側コンタクトケース１３及び絶縁支持体１４内を中空形成し、互いに大気を連通させた構成としている。さらに絶縁支持体１４は固定側支持板２９に直接取り付けられるとともに、絶縁支持体１４内は取付板２９の通気口部２９ａに設けられたフィルタ３１を介して、接地タンク１外部と連通されている。こうすることで、可動側と同様に、接地タンク１内の絶縁性ガスよりも比較的冷たい、接地タンク１外部の大気が絶縁支持体１４側からも流入する。   In this embodiment, as shown in FIG. 4, the inside of the fixed side conductor 24, the fixed side contact case 13 and the insulating support 14 is formed hollow, and the atmosphere is communicated with each other. Further, the insulating support 14 is directly attached to the fixed support plate 29, and the inside of the insulating support 14 is communicated with the outside of the ground tank 1 through a filter 31 provided in the vent portion 29a of the mounting plate 29. . By doing so, similarly to the movable side, the atmosphere outside the ground tank 1 that is relatively cooler than the insulating gas in the ground tank 1 flows also from the insulating support 14 side.

流入した大気は高温部となる固定側コンタクトケース１３の周囲で温められて上昇気流となり、固定側導体２４内を通過した後、固定側ブッシング端子２６に設けられた通気口部（図示せず）より接地タンク１外部に放出される。このような上昇気流により、固定側コンタクトケース１３の周囲が効率よく冷却される。なお、固定側ブッシング端子２６の通気口部は、可動側ブッシング端子の通気口部２５ａと同様の構造のため図示を省略する。   The inflowing air is heated around the fixed contact case 13 that becomes a high temperature portion to become an ascending air current, and after passing through the fixed conductor 24, a vent (not shown) provided in the fixed bushing terminal 26 And discharged to the outside of the ground tank 1. By such an updraft, the periphery of the stationary contact case 13 is efficiently cooled. Note that the vent part of the fixed-side bushing terminal 26 has the same structure as that of the vent part 25a of the movable-side bushing terminal, and therefore the illustration thereof is omitted.

以上述べたように本実施例によれば、固定側導体２４及び絶縁支持体１４を中空に形成して連通し、絶縁支持体１４内から固定側コンタクトケース１３内を介して固定側ブッシング端子２６に至るまでに接地タンク１外部の大気が通る通気路を形成し、該大気を自然対流させることで、真空インタラプタ２両端における冷却効果が期待でき、実施例１に比べてよりいっそう遮断器の通電容量の増加を図ることができる。   As described above, according to the present embodiment, the fixed-side conductor 24 and the insulating support 14 are formed hollow and communicated with each other, and the fixed-side bushing terminal 26 is connected from the inside of the insulating support 14 to the fixed-side contact case 13. By forming a ventilation path through which the atmosphere outside the grounded tank 1 passes and natural convection, the cooling effect at both ends of the vacuum interrupter 2 can be expected, and the circuit breaker is more energized than in the first embodiment. The capacity can be increased.

また、固定側ブッシング端子２６の通気口部（図示せず）及び固定側支持板２９の通気口部２９ａにフィルタ３１を設けたので、雨水等が接地タンク１内の固定側に形成した通気路に浸入することを防止できる。   In addition, since the filter 31 is provided in the vent portion (not shown) of the fixed-side bushing terminal 26 and the vent portion 29a of the fixed-side support plate 29, rain passages and the like are formed on the fixed side in the ground tank 1. Can be prevented from entering.

１ 接地タンク
２ 真空インタラプタ
８ ベローズ
９ 可動側コンタクトケース
１０ サポート
１１ 絶縁支持筒
１３ 固定側コンタクトケース
１４ 絶縁支持体
１６ 絶縁ロッド
２３ 可動側導体
２４ 固定側導体
２５ 可動側ブッシング端子
２６ 固定側ブッシング端子
２５ａ、２８ａ、２９ａ 通気口部
２７、３０、３１ フィルタ
２８ 可動側支持板
２９ 固定側支持板 DESCRIPTION OF SYMBOLS 1 Grounding tank 2 Vacuum interrupter 8 Bellows 9 Movable side contact case 10 Support 11 Insulating support cylinder 13 Fixed side contact case 14 Insulating support 16 Insulating rod 23 Movable side conductor 24 Fixed side conductor 25 Movable side bushing terminal 26 Fixed side bushing terminal 25a , 28a, 29a Ventilation holes 27, 30, 31 Filter 28 Movable support plate 29 Fixed support plate

Claims (4)

絶縁媒体を密封した接地タンクと、
前記接地タンク内に絶縁支持され、一対の電極を備えた真空インタラプタと、
前記タンクの上方に延びた１対のブッシング内に配置された可動側及び固定側導体と、
前記可動側導体の下端を前記真空インタラプタの可動側電極に電気的に接続する可動側コンタクトケースと、
前記固定側導体の下端を前記真空インタラプタの固定側電極に電気的に接続する固定側コンタクトケースと、
前記可動側及び固定側導体の上端とそれぞれ接続する可動側及び固定側ブッシング端子と、
前記真空インタラプタの可動側電極を操作するために前記接地タンク外の操作器に接続された絶縁ロッドと、
前記真空インタラプタの可動側及び固定側コンタクトケースを前記接地タンクに絶縁支持する絶縁支持筒及び絶縁支持体と、
前記接地タンクの一部を形成すると共に、前記絶縁支持筒及び前記絶縁支持体を前記接地タンクに固定するための可動側及び固定側支持板を備えた真空遮断器において、
前記可動側導体と前記可動側コンタクトケースを中空に形成して連通させ、
さらに前記可動側ブッシング端子及び前記可動側支持板に前記接地タンク外部への通気口部を設け、
前記可動側支持板の通気口部から前記絶縁支持筒内、前記可動側コンタクトケース内、前記可動側導体内、前記可動側ブッシング端子の通気口部を経て大気に至る通気路を形成したことを特徴とするタンク形真空遮断器。 A grounded tank sealed with an insulating medium;
A vacuum interrupter that is insulated and supported in the ground tank and includes a pair of electrodes;
A movable side and a fixed side conductor disposed in a pair of bushings extending above the tank;
A movable contact case for electrically connecting the lower end of the movable conductor to the movable electrode of the vacuum interrupter;
A fixed contact case that electrically connects a lower end of the fixed conductor to a fixed electrode of the vacuum interrupter;
A movable side and fixed side bushing terminal connected to the upper ends of the movable side and fixed side conductors, respectively;
An insulating rod connected to an operating device outside the ground tank for operating the movable electrode of the vacuum interrupter;
An insulating support cylinder and an insulating support for insulatingly supporting the movable and fixed contact cases of the vacuum interrupter on the ground tank; and
A vacuum circuit breaker comprising a movable side and a fixed side support plate for fixing the insulating support cylinder and the insulating support to the ground tank while forming a part of the ground tank.
The movable side conductor and the movable side contact case are formed in a hollow shape and communicated with each other,
Further, the movable side bushing terminal and the movable side support plate are provided with a vent portion to the outside of the ground tank,
Forming a vent path from the vent portion of the movable side support plate to the atmosphere through the insulating support cylinder, the movable side contact case, the movable side conductor, and the vent portion of the movable side bushing terminal. Characteristic tank type vacuum circuit breaker. 前記可動側ブッシング端子及び前記可動側支持板の通気口部に水滴の侵入を阻止するフィルタを設けたことを特徴とする請求項１に記載のタンク形真空遮断器。   2. The tank-type vacuum circuit breaker according to claim 1, wherein a filter for preventing intrusion of water droplets is provided at the vent portion of the movable side bushing terminal and the movable side support plate. 前記固定側導体、前記固定側コンタクトケース及び前記絶縁支持体を中空に形成して連通させ、
さらに前記固定側ブッシング端子及び前記固定側支持板に前記接地タンク外部への通気口部を設け、
前記固定側支持板の通気口部から前記固定側絶縁支持体内、前記固定側コンタクトケース内、前記固定側導体内、前記固定側ブッシング端子の通気口部を経て大気に至る通気路を形成したことを特徴とする請求項１に記載のタンク形真空遮断器。 The fixed-side conductor, the fixed-side contact case and the insulating support are formed in a hollow and communicated with each other,
Further, the stationary-side bushing terminal and the stationary-side support plate are provided with a vent portion to the outside of the ground tank,
An air passage is formed from the vent portion of the fixed side support plate to the atmosphere through the fixed side insulating support body, the fixed side contact case, the fixed side conductor, and the vent portion of the fixed side bushing terminal. The tank-type vacuum circuit breaker according to claim 1. 前記固定側ブッシング端子及び前記固定側支持板の通気口部に水滴の侵入を阻止するフィルタを設けたことを特徴とする請求項３に記載のタンク形真空遮断器。   4. The tank-type vacuum circuit breaker according to claim 3, wherein a filter for preventing water droplets from entering is provided at the vent portion of the fixed-side bushing terminal and the fixed-side support plate.
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CN103441031A (en) * 2013-08-30 2013-12-11 沈阳华德海泰电子有限公司 Double fracture tank type vacuum circuit breaker
CN104485252A (en) * 2014-11-20 2015-04-01 平高集团有限公司 Vacuum circuit breaker, and embedded pole and conductive seat thereof
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CN103441031A (en) * 2013-08-30 2013-12-11 沈阳华德海泰电子有限公司 Double fracture tank type vacuum circuit breaker
WO2015043938A1 (en) * 2013-09-24 2015-04-02 Siemens Aktiengesellschaft Converter housing arrangement
CN104485252A (en) * 2014-11-20 2015-04-01 平高集团有限公司 Vacuum circuit breaker, and embedded pole and conductive seat thereof
CN104485255A (en) * 2014-11-20 2015-04-01 平高集团有限公司 Double-break switch equipment and monopole structure thereof
US11462376B2 (en) 2019-01-31 2022-10-04 Mitsubishi Electric Corporation Vacuum circuit breaker
WO2021140668A1 (en) 2020-01-10 2021-07-15 三菱電機株式会社 Vacuum interrupter
EP4089706A4 (en) * 2020-01-10 2023-01-11 Mitsubishi Electric Corporation Vacuum interrupter
US11935713B2 (en) 2020-01-10 2024-03-19 Mitsubishi Electric Corporation Vacuum circuit breaker
CN113410087A (en) * 2021-06-17 2021-09-17 西安西电开关电气有限公司 Compact high-pressure tank type rapid mechanical combination switch equipment
CN113410087B (en) * 2021-06-17 2023-06-20 西安西电开关电气有限公司 Compact high-voltage tank type quick mechanical combined switch equipment
JP7114000B1 (en) * 2021-11-08 2022-08-05 三菱電機株式会社 Arc-extinguishing chamber, vacuum circuit breaker and arc-extinguishing chamber assembly method
WO2023079740A1 (en) * 2021-11-08 2023-05-11 三菱電機株式会社 Arc-extinguishing chamber, vacuum breaker, and method for assembling arc-extinguishing chamber

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