JP4695496B2 - Vacuum switchgear - Google Patents

Vacuum switchgear Download PDF

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Publication number
JP4695496B2
JP4695496B2 JP2005327807A JP2005327807A JP4695496B2 JP 4695496 B2 JP4695496 B2 JP 4695496B2 JP 2005327807 A JP2005327807 A JP 2005327807A JP 2005327807 A JP2005327807 A JP 2005327807A JP 4695496 B2 JP4695496 B2 JP 4695496B2
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fixed
movable
vacuum
insulating container
vacuum insulating
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JP2007134231A (en
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哲 塩入
浩資 捧
純一 佐藤
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Toshiba Corp
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Toshiba Corp
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    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • H01H2033/024—Details particular to three-phase circuit breakers with a triangular setup of circuit breakers
    • 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
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • 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
    • H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators

Description

本発明は、複数組の接離自在の一対の接点を一つの真空絶縁容器に設けた真空開閉装置に関する。   The present invention relates to a vacuum switchgear in which a plurality of pairs of contactable contacts are provided in one vacuum insulating container.

従来、この種の真空開閉装置の遮断部は、三相交流回路において、一つの真空絶縁容器内に三相分の接離自在の一対の接点を収納したものが知られている（例えば、特許文献１参照。）。三相分の接点は、それぞれアークシールドで包囲され、各相が所定の間隔を保って配置されている。しかしながら、アークシールドで接点間を完全に包囲することができず、電流遮断時に発生する金属蒸気が真空絶縁容器内に拡散されることがある。金属蒸気が拡散されると、各相の金属蒸気が相互干渉し、遮断特性が低下する。   Conventionally, a shut-off part of this type of vacuum switchgear is known in a three-phase AC circuit in which a pair of contacts that can be separated from each other are housed in a single vacuum insulating container (for example, a patent) Reference 1). The contacts for the three phases are each surrounded by an arc shield, and the phases are arranged at a predetermined interval. However, the arc shield cannot completely enclose the contacts, and metal vapor generated when the current is interrupted may be diffused into the vacuum insulating container. When the metal vapor is diffused, the metal vapors of the respective phases interfere with each other, and the blocking characteristics are deteriorated.

これを解決するために、独立した真空絶縁容器内に一相分の接離自在の一対の接点を収納し、これらの三相分をエポキシ樹脂により一体でモールドしたものが知られている（例えば、特許文献２参照。）。しかしながら、三相分の真空絶縁容器をエポキシ樹脂で一体にモールドしなければならないので、モールド工程の追加など製造工程が増加していた。また、エポキシ樹脂は、有機絶縁物であり、課電による絶縁劣化を考慮しなくてはならなかった。
特開２０００−１４９７３３号公報 （第３〜４ページ、図１） 特開２００３−３３３７１５号公報 （第１６ページ、図１） In order to solve this, a pair of contact points that can be contacted and separated for one phase is housed in an independent vacuum insulating container, and these three phases are integrally molded with epoxy resin (for example, known) , See Patent Document 2). However, since the three-phase vacuum insulation containers must be integrally molded with epoxy resin, the number of manufacturing processes such as the addition of a molding process has increased. In addition, the epoxy resin is an organic insulator, and it has been necessary to consider insulation deterioration due to electric power.
JP 2000-149733 A (pages 3 to 4, FIG. 1) JP 2003-333715 A (page 16, FIG. 1)

上記の従来の真空開閉装置においては、遮断部が一つの真空絶縁容器に収納されているため、遮断特性が低下したり、また、エポキシ樹脂でモールドしているため、製造工程の増加や絶縁劣化を考慮したりしなくてはならない問題があった。   In the conventional vacuum switchgear described above, since the blocking part is housed in one vacuum insulating container, the blocking characteristic is lowered, or because it is molded with epoxy resin, the manufacturing process increases and the insulation deteriorates There was a problem that had to be considered.

このため、各相の遮断部を独立した真空絶縁容器内に収納し、この真空絶縁容器を絶縁劣化などが起き難いものにすることが望まれていた。   For this reason, it has been desired that the shut-off portion of each phase is housed in an independent vacuum insulating container so that the vacuum insulating container is less prone to insulation deterioration.

本発明は上記問題を解決するためになされたもので、遮断特性を向上させ、絶縁劣化の起き難い真空開閉装置を提供することを目的とする。   The present invention has been made to solve the above problems, and an object of the present invention is to provide a vacuum switchgear that improves the breaking characteristics and is less likely to cause insulation deterioration.

上記目的を達成するために、本発明の真空開閉装置は、独立した複数の開口孔を設けた無機絶縁物からなる真空絶縁容器と、前記開口孔の一方端のそれぞれに封着された固定側封着金具と、前記固定側封着金具のそれぞれに貫通固定された固定側通電軸と、前記固定側通電軸端のそれぞれに固着された固定側接点と、前記開口孔の他方端のそれぞれに封着された可動側封着金具と、前記可動側封着金具のそれぞれを気密のもと移動自在に貫通する可動側通電軸と、前記可動側通電軸端のそれぞれに固着されるとともに、前記固定側接点と対向して設けられた可動側接点と、前記可動側通電軸のそれぞれに連結された操作機構とを備え、前記開口孔の軸方向を一列配置とし、前記真空絶縁容器の外周に接地層を設けたことを特徴とする。 In order to achieve the above object, a vacuum switchgear according to the present invention comprises a vacuum insulating container made of an inorganic insulator provided with a plurality of independent openings, and a fixed side sealed at one end of each of the openings. A sealing bracket, a fixed energizing shaft fixedly penetrating to each of the fixed sealing brackets, a fixed contact fixed to each of the fixed energizing shaft ends, and each of the other ends of the opening holes It is fixed to each of the sealed movable side metal fitting, the movable side current-carrying shaft movably penetrating through each of the movable side metal fittings, and the end of the movable-side current shaft. A movable side contact provided opposite to the fixed side contact, and an operation mechanism connected to each of the movable side energization shafts, the axial direction of the opening holes being arranged in a line, and the outer periphery of the vacuum insulating container A grounding layer is provided .

本発明によれば、複数組の一対の接点を独立した複数の開口孔を有する無機絶縁物からなる真空絶縁容器内にそれぞれ収納しているので、電流遮断時に発生する金属蒸気が相互干渉することなく遮断特性を向上させることができ、長期間に亙り安定した絶縁特性を得ることができる。   According to the present invention, a plurality of pairs of contact points are respectively housed in vacuum insulating containers made of an inorganic insulator having a plurality of independent opening holes, so that metal vapor generated at the time of current interruption interferes with each other. Therefore, it is possible to improve the interruption characteristic and to obtain a stable insulation characteristic over a long period of time.

以下、図面を参照して本発明の実施例を説明する。   Embodiments of the present invention will be described below with reference to the drawings.

先ず、本発明の実施例１に係る真空開閉装置を図面を参照して説明する。図１は、本発明の実施例１に係る真空開閉装置の一部を断面して示す側面図である。   First, a vacuum switchgear according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a part of a vacuum switchgear according to Embodiment 1 of the present invention.

図１に示すように、真空開閉装置は、三相交流回路において、三相分の遮断部１ａと遮断部１ａに連結された操作機構部１ｂとから構成されている。   As shown in FIG. 1, the vacuum switching device includes a three-phase blocking unit 1 a and an operation mechanism unit 1 b connected to the blocking unit 1 a in a three-phase AC circuit.

遮断部１ａには、例えばアルミナ磁器のような無機絶縁物からなる長方形体の真空絶縁容器２が設けられている。真空絶縁容器２の長手方向には、各相が離間して独立した筒状の開口孔３が一列配置に設けられている。このような真空絶縁容器２は、焼成前の原料の段階から開口孔３を形成していてもよく、焼成後に機械加工で開口孔３を形成させたものでもよい。   The blocking portion 1a is provided with a rectangular vacuum insulating container 2 made of an inorganic insulator such as alumina porcelain. In the longitudinal direction of the vacuum insulating container 2, the cylindrical opening holes 3 that are separated from each other and are independent are provided in a row. Such a vacuum insulating container 2 may have the opening 3 formed from the stage of the raw material before firing, or may be formed by machining after firing.

以下、開口孔３の構成を一相分について説明する。開口孔３の両端開口部には、固定側封着金具４と可動側封着金具５とが封着されている。固定側封着金具４には、一方の電路となる固定側通電軸６が気密に貫通固定され、開口孔３内の固定側通電軸６端に固定側接点７が固着されている。固定側接点７と対向して、接離自在の可動側接点８が可動側通電軸９端に固着されている。可動側通電軸９は、可動側封着金具５の中央開口部を移動自在に貫通している。   Hereinafter, the structure of the opening 3 will be described for one phase. A fixed-side sealing metal fitting 4 and a movable-side sealing metal fitting 5 are sealed at both ends of the opening hole 3. A fixed-side energizing shaft 6 serving as one electric circuit is hermetically penetrated and fixed to the fixed-side sealing metal fitting 4, and a fixed-side contact 7 is fixed to the end of the fixed-side energizing shaft 6 in the opening hole 3. Opposite to the fixed side contact 7, a movable side contact 8 that can be freely contacted and separated is fixed to the end of the movable side energizing shaft 9. The movable energizing shaft 9 penetrates through the central opening of the movable sealing metal fitting 5 so as to be movable.

可動側通電軸９の中間部には、伸縮自在のベローズ１０の一方端が気密に取り付けられ、他方端が可動側封着金具５の中央開口部に気密に取り付けられている。これにより、開口孔３内の真空度を１０−２Ｐａ以下に維持しながら、可動側通電軸９を軸方向に移動させることが可能となっている。 One end of a telescopic bellows 10 is airtightly attached to the intermediate portion of the movable side energizing shaft 9, and the other end is airtightly attached to the central opening of the movable side sealing fitting 5. Thereby, it is possible to move the movable energizing shaft 9 in the axial direction while maintaining the degree of vacuum in the opening hole 3 at 10 −2 Pa or less.

一方、開口孔３内の中間部に突出して設けられた突出部２ａには、両接点７、８を包囲するような筒状のアークシールド１１が固定されており、接点７、８間で電流遮断したときに発生する金属蒸気が開口孔３内面に付着し、絶縁抵抗を低下させることを防止している。   On the other hand, a cylindrical arc shield 11 that surrounds both the contacts 7 and 8 is fixed to the projecting portion 2 a provided so as to project at the intermediate portion in the opening hole 3. It prevents the metal vapor generated when shut off from adhering to the inner surface of the opening 3 and lowering the insulation resistance.

可動側通電軸９の可動側封着金具５外には、他方の電路となる可動側外部導体１２が摺動形接触子１３を介して設けられている。また、可動側外部導体１２や固定側通電軸６と所定の絶縁距離を保った真空絶縁容器２の外周には、例えばカーボン塗料のような導電性塗料を塗布して形成させた接地電位の接地層１４が設けられている。   Outside the movable side metal fitting 5 of the movable side current-carrying shaft 9, a movable-side outer conductor 12 serving as the other electric circuit is provided via a sliding contact 13. In addition, a ground potential contact formed by applying a conductive paint such as a carbon paint on the outer periphery of the vacuum insulating container 2 maintaining a predetermined insulation distance from the movable outer conductor 12 and the fixed energizing shaft 6. A formation 14 is provided.

操作機構部１ｂには、三相分の可動側通電軸９に図示しない絶縁ロッドを介して連結された磁性体１５、この磁性体１５を移動させる永久磁石１６や操作コイル１７を有する電磁アクチュエータのような操作機構１８が設けられている。この操作機構１８により、接点７、８の開閉が行えるようになっている。   The operation mechanism 1b includes a magnetic body 15 connected to the movable energizing shaft 9 for three phases via an insulating rod (not shown), a permanent magnet 16 for moving the magnetic body 15, and an electromagnetic actuator having an operation coil 17. Such an operating mechanism 18 is provided. The operation mechanism 18 can open and close the contacts 7 and 8.

これにより、三相分の接点７、８は、それぞれ独立した開口孔３に収納されているので、電流遮断時に発生する金属蒸気が互いの相間で相互干渉することなく、遮断特性を向上させることができる。また、それぞれの開口孔３の軸方向を略平行とし、互いの間隔を略等間隔とすれば、電界分布が乱れ難く、遮断特性のほか耐電圧特性を向上させることができる。   As a result, the contact points 7 and 8 for the three phases are housed in the independent opening holes 3 respectively, so that the metal vapor generated at the time of current interruption does not interfere with each other and improves the interruption characteristics. Can do. Further, if the axial directions of the respective apertures 3 are made substantially parallel and the intervals between them are made substantially equal, the electric field distribution is hardly disturbed, and the withstand voltage characteristics as well as the cutoff characteristics can be improved.

更には、真空絶縁容器２は、無機絶縁物からなっているので、絶縁劣化し難く、数十ｋＶクラスの高電圧下においても長期間に亙り安定した絶縁特性を得ることができる。一般的に、アルミナ磁器のような無機絶縁物は、エポキシ樹脂のような有機絶縁物と比べて、課電による絶縁劣化が格段に起き難いものである。   Furthermore, since the vacuum insulating container 2 is made of an inorganic insulator, the insulation is hardly deteriorated, and stable insulating characteristics can be obtained over a long period even under a high voltage of several tens of kV class. In general, an inorganic insulator such as alumina porcelain is much less susceptible to insulation deterioration due to voltage application than an organic insulator such as an epoxy resin.

また、真空絶縁容器２の外周には、接地層１４を設けているので、外部から異物が接触しても、電界分布が乱れることがなく、真空絶縁容器２の電界緩和が図れる。なお、真空絶縁容器２の外部に異物などが接触しないように所定の絶縁距離を保った囲いなどを設けるものでは、この接地層１４を取り除いてもよい。   In addition, since the grounding layer 14 is provided on the outer periphery of the vacuum insulating container 2, the electric field distribution is not disturbed even if foreign matter comes into contact with the outside, and the electric field of the vacuum insulating container 2 can be reduced. Note that the ground layer 14 may be removed in the case of providing an enclosure or the like that maintains a predetermined insulation distance so that foreign matter does not come into contact with the outside of the vacuum insulating container 2.

上記実施例１の真空開閉装置によれば、三相分の接点７、８がそれぞれ独立した開口孔３を有する無機絶縁物からなる真空絶縁容器２内に収納されているので、電流遮断時に発生する金属蒸気が相互干渉することなく遮断特性を向上させることができ、長期間に亙り安定した絶縁特性を得ることができる。   According to the vacuum switchgear according to the first embodiment, the three-phase contacts 7 and 8 are housed in the vacuum insulating container 2 made of an inorganic insulator having the independent opening 3, and therefore generated when the current is interrupted. Therefore, the barrier property can be improved without interfering with each other, and a stable insulating property can be obtained over a long period of time.

次に、本発明の実施例２に係る真空開閉装置を図２を参照して説明する。図２は、本発明の実施例２に係る真空開閉装置を示す上面図である。なお、この実施例２が実施例１と異なる点は、開口孔の配置である。図２において、実施例１と同様の構成部分においては、同一符号を付し、その詳細な説明を省略する。   Next, a vacuum switchgear according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 2 is a top view showing a vacuum switchgear according to Embodiment 2 of the present invention. The difference between the second embodiment and the first embodiment is the arrangement of the opening holes. In FIG. 2, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図２に示すように、例えばアルミナ磁器のような無機絶縁物からなる真空絶縁容器２０は、三角柱体となっている。そして、開口孔３が三角配置されている。なお、開口孔３を正三角形のそれぞれの頂点に設けると省スペースとなり好ましい。   As shown in FIG. 2, the vacuum insulating container 20 made of an inorganic insulator such as alumina porcelain is a triangular prism. And the opening hole 3 is triangularly arranged. Note that it is preferable to provide the opening hole 3 at each vertex of the equilateral triangle because space is saved.

上記実施例２の真空開閉装置によれば、実施例１による効果のほかに、真空開閉装置の幅方向の寸法を縮小することができる。   According to the vacuum switchgear of the second embodiment, in addition to the effects of the first embodiment, the widthwise dimension of the vacuum switchgear can be reduced.

次に、本発明の実施例３に係る真空開閉装置を図３を参照して説明する。図３は、本発明の実施例３に係る真空開閉装置を示す上面図である。なお、この実施例３が実施例２と異なる点は、真空絶縁容器に貫通孔を設けたことである。図３において、図２と同様の構成部分においては、同一符号を付し、その詳細な説明を省略する。   Next, a vacuum switchgear according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 3 is a top view showing a vacuum switchgear according to Embodiment 3 of the present invention. The third embodiment differs from the second embodiment in that a through hole is provided in the vacuum insulating container. 3, the same components as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

図３に示すように、三角柱体の真空絶縁容器２０の軸方向の中心部（三角形の重心）には、三角形状の貫通孔２１が設けられている。なお、貫通孔２１は、三角形状が内面の表面積が大きく好ましいが、筒状、多角形状のいずれでもよい。   As shown in FIG. 3, a triangular through-hole 21 is provided at the axial center (triangular center of gravity) of the vacuum insulating container 20 having a triangular prism shape. In addition, although the triangular shape of the through-hole 21 is preferable because the surface area of the inner surface is large, it may be either cylindrical or polygonal.

上記実施例３の真空開閉装置によれば、実施例２による効果のほかに、真空絶縁容器２０の重量を軽減することができ、更に、貫通孔２１により冷却効果を生じさせることができる。   According to the vacuum switching device of the third embodiment, in addition to the effects of the second embodiment, the weight of the vacuum insulating container 20 can be reduced, and the cooling effect can be generated by the through holes 21.

なお、本発明は、上記実施例に限定されるものではなく、発明の要旨を逸脱しない範囲で、種々変形して実施することができる。上記実施例では、三相分について説明したが、直流回路のような正極性と負極性の二相分においても、一つの真空絶縁容器に独立した開口孔を二つ設け、遮断部を形成することができる。   In addition, this invention is not limited to the said Example, In the range which does not deviate from the summary of invention, it can implement in various deformation | transformation. In the above embodiment, the three-phase component has been described. However, in the two-phase component having a positive polarity and a negative polarity as in a DC circuit, two independent opening holes are provided in one vacuum insulating container to form a blocking portion. be able to.

本発明の実施例１に係る真空開閉装置の一部を断面して示す側面図。1 is a side view showing a part of a vacuum switchgear according to Embodiment 1 of the present invention. 本発明の実施例２に係る真空開閉装置を示す上面図。The top view which shows the vacuum switchgear which concerns on Example 2 of this invention. 本発明の実施例３に係る真空開閉装置を示す上面図。The top view which shows the vacuum switchgear which concerns on Example 3 of this invention.

符号の説明Explanation of symbols

１ａ 遮断部
１ｂ 操作機構部
２、２０ 真空絶縁容器
２ａ 突出部
３ 開口孔
４ 固定側封着金具
５ 可動側封着金具
６ 固定側通電軸
７ 固定側接点
８ 可動側接点
９ 可動側通電軸
１０ ベローズ
１１ アークシールド
１２ 可動側外部導体
１３ 摺動形接触子
１４ 接地層
１５ 磁性体
１６ 永久磁石
１７ 操作コイル
１８ 操作機構
２１ 貫通孔 DESCRIPTION OF SYMBOLS 1a Blocking part 1b Operation mechanism part 2, 20 Vacuum insulating container 2a Protruding part 3 Opening hole 4 Fixed side metal fitting 5 Movable side metal fitting 6 Fixed side energizing shaft 7 Fixed side contact 8 Movable side contact 9 Movable side energized axis 10 Bellows 11 Arc shield 12 Movable outer conductor 13 Sliding contact 14 Ground layer 15 Magnetic body 16 Permanent magnet 17 Operating coil 18 Operating mechanism 21 Through-hole

Claims (2)

独立した複数の開口孔を設けた無機絶縁物からなる真空絶縁容器と、
前記開口孔の一方端のそれぞれに封着された固定側封着金具と、
前記固定側封着金具のそれぞれに貫通固定された固定側通電軸と、
前記固定側通電軸端のそれぞれに固着された固定側接点と、
前記開口孔の他方端のそれぞれに封着された可動側封着金具と、
前記可動側封着金具のそれぞれを気密のもと移動自在に貫通する可動側通電軸と、
前記可動側通電軸端のそれぞれに固着されるとともに、前記固定側接点と対向して設けられた可動側接点と、
前記可動側通電軸のそれぞれに連結された操作機構とを備え、
前記開口孔の軸方向を一列配置とし、
前記真空絶縁容器の外周に接地層を設けたことを特徴とする真空開閉装置。 A vacuum insulating container made of an inorganic insulator provided with a plurality of independent openings;
A fixed-side sealing fitting sealed to each one end of the opening hole;
A fixed-side energizing shaft that is fixed to each of the fixed-side sealing metal fittings, and
Fixed-side contact fixed to each of the fixed-side energizing shaft ends;
A movable-side sealing fitting sealed to each of the other ends of the opening holes;
A movable-side energizing shaft that movably passes through each of the movable-side sealing fittings in an airtight manner;
A movable side contact fixed to each of the movable side energized shaft ends and provided facing the fixed side contact;
An operation mechanism connected to each of the movable side energizing shafts ,
The axial direction of the opening holes is arranged in a row,
A vacuum switchgear characterized in that a grounding layer is provided on the outer periphery of the vacuum insulating container . 独立した複数の開口孔を設けた無機絶縁物からなる真空絶縁容器と、
前記開口孔の一方端のそれぞれに封着された固定側封着金具と、
前記固定側封着金具のそれぞれに貫通固定された固定側通電軸と、
前記固定側通電軸端のそれぞれに固着された固定側接点と、
前記開口孔の他方端のそれぞれに封着された可動側封着金具と、
前記可動側封着金具のそれぞれを気密のもと移動自在に貫通する可動側通電軸と、
前記可動側通電軸端のそれぞれに固着されるとともに、前記固定側接点と対向して設けられた可動側接点と、
前記可動側通電軸のそれぞれに連結された操作機構とを備え、
前記開口孔の軸方向を三角配置とし、その中心部に貫通孔を設け、
前記真空絶縁容器の外周に接地層を設けたことを特徴とする真空開閉装置。 A vacuum insulating container made of an inorganic insulator provided with a plurality of independent openings;
A fixed-side sealing fitting sealed to each one end of the opening hole;
A fixed-side energizing shaft that is fixed to each of the fixed-side sealing metal fittings, and
Fixed-side contact fixed to each of the fixed-side energizing shaft ends;
A movable-side sealing fitting sealed to each of the other ends of the opening holes;
A movable-side energizing shaft that movably passes through each of the movable-side sealing fittings in an airtight manner;
A movable side contact fixed to each of the movable side energized shaft ends and provided facing the fixed side contact;
An operation mechanism connected to each of the movable side energizing shafts,
The axial direction of the opening hole is a triangular arrangement, and a through hole is provided at the center thereof,
A vacuum switchgear characterized in that a grounding layer is provided on the outer periphery of the vacuum insulating container .
JP2005327807A 2005-11-11 2005-11-11 Vacuum switchgear Expired - Fee Related JP4695496B2 (en)

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JP2005327807A JP4695496B2 (en) 2005-11-11 2005-11-11 Vacuum switchgear

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3944276B1 (en) * 2020-07-20 2023-02-08 ABB Schweiz AG Circuit breaker compartment

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50132474A (en) * 1974-04-10 1975-10-20
JPS53109069U (en) * 1977-02-07 1978-09-01
JPS56120042A (en) * 1980-02-27 1981-09-21 Meidensha Electric Mfg Co Ltd Vacuum switch
JPS63186031U (en) * 1987-05-25 1988-11-29
JPH01320720A (en) * 1988-06-22 1989-12-26 Mitsubishi Electric Corp Vacuum switch tube
JPH0628953A (en) * 1992-07-10 1994-02-04 Toshiba Corp Switchear
JP2002093293A (en) * 2000-09-18 2002-03-29 Toshiba Corp Vacuum valve for disconnecting switch
JP2005197128A (en) * 2004-01-08 2005-07-21 Mitsubishi Electric Corp Complex insulation switchgear

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50132474A (en) * 1974-04-10 1975-10-20
JPS53109069U (en) * 1977-02-07 1978-09-01
JPS56120042A (en) * 1980-02-27 1981-09-21 Meidensha Electric Mfg Co Ltd Vacuum switch
JPS63186031U (en) * 1987-05-25 1988-11-29
JPH01320720A (en) * 1988-06-22 1989-12-26 Mitsubishi Electric Corp Vacuum switch tube
JPH0628953A (en) * 1992-07-10 1994-02-04 Toshiba Corp Switchear
JP2002093293A (en) * 2000-09-18 2002-03-29 Toshiba Corp Vacuum valve for disconnecting switch
JP2005197128A (en) * 2004-01-08 2005-07-21 Mitsubishi Electric Corp Complex insulation switchgear

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