JPH07249351A - Gas filled breaker - Google Patents
Gas filled breakerInfo
- Publication number
- JPH07249351A JPH07249351A JP3893994A JP3893994A JPH07249351A JP H07249351 A JPH07249351 A JP H07249351A JP 3893994 A JP3893994 A JP 3893994A JP 3893994 A JP3893994 A JP 3893994A JP H07249351 A JPH07249351 A JP H07249351A
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- shield
- contact
- arc
- movable contact
- 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.)
- Pending
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ガス断路器に関し、特
に固定コンタクトを覆うシールドと可動コンタクトの先
端部を改良したガス断路器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas disconnector, and more particularly to a gas disconnector having an improved shield covering a fixed contact and a tip of a movable contact.
【0002】[0002]
【従来の技術】ガス絶縁開閉装置は、遮断器,断路器,
接地開閉器等で構成され、断路器は一般的に電流を切る
ことなく、無電流の状態で入・切りされるが、しかし、
実際にはある程度の充電電流,ループ電流などを開閉す
る開閉能力を備えている。2. Description of the Related Art Gas-insulated switchgear includes circuit breakers, disconnectors,
It consists of a grounding switch, etc., and the disconnecting switch is generally turned on and off without cutting the current, but
Actually, it has a switching ability to open and close charging current and loop current to some extent.
【0003】図2はこの電流開閉能力を備えた断路器
で、絶縁ガス中に設けた固定側ユニット1と、可動側ユ
ニット2とで構成され、固定側ユニットは次のように構
成されている。FIG. 2 shows a disconnecting switch having this current switching capability, which is composed of a fixed unit 1 and a movable unit 2 provided in an insulating gas. The fixed unit is constructed as follows. .
【0004】図示を省略した固定部に固定され、先端に
鍔3a付円柱部を有する固定ベース3と、鍔3aの外周
部に放射状の溝を多数設けて接触片4を挿入し2個のリ
ング状コイルばね5により固定ベース3に取り付けると
同時に、挿入された可動コンタクトとの間に接触圧力を
保持する固定コンタクト6と、固定コンタクト6での電
界集中を防止するために設けられるとともに外周面の角
部に大きなアールが形成された固定側シールド7とで構
成される。A fixed base 3 which is fixed to a fixed portion (not shown) and has a cylindrical portion with a collar 3a at its tip, and a large number of radial grooves are provided on the outer peripheral portion of the collar 3a to insert a contact piece 4 into which two rings are inserted. The fixed contact 6 is attached to the fixed base 3 by the coil spring 5, and at the same time, the fixed contact 6 holds contact pressure between the fixed contact 6 and the inserted movable contact. It is composed of a fixed side shield 7 having large rounded corners.
【0005】一方可動側ユニット2は、筒状であって固
定側ベース3と同一軸心の状態で図示省略の固定部に固
定されたシリンダ8と,該シリンダ8内の先端に埋設さ
れたリング状の通電コンタクト9と,固定側シールド7
と同様の目的で設けられた可動側シールド10と,通電
コンタクト9に対して摺動自在にシリンダ8内に設けら
れるとともに、図示省略の駆動手段に連動連結された可
動コンタクト11と軸受12とで構成される。On the other hand, the movable unit 2 has a cylindrical shape and a cylinder 8 fixed to a fixed portion (not shown) in the same axial center as the fixed base 3, and a ring embedded in the tip of the cylinder 8. -Shaped energizing contact 9 and fixed side shield 7
The movable side shield 10 provided for the same purpose as above, the movable contact 11 and the bearing 12 which are provided in the cylinder 8 so as to be slidable with respect to the energizing contacts 9 and which are interlocked and coupled with a driving means (not shown). Composed.
【0006】図2(A)は閉路状態の断面図で、この状
態から開路(断路)する場合は、可動コンタクト11を
図2(A)の右方へ駆動する。可動コンタクト11が右
側に移動すると、可動コンタクト11は固定コンタクト
6と離れて断路されるが、離れる際、ループ電流が流れ
ていると、両コンタクト間にアークが発生しそのアーク
が引き伸ばされて消弧し、断路状態となる。FIG. 2A is a cross-sectional view of a closed state. When opening (disconnecting) from this state, the movable contact 11 is driven to the right in FIG. 2A. When the movable contact 11 moves to the right side, the movable contact 11 is disconnected from the fixed contact 6 and is disconnected. However, when a loop current flows when the movable contact 11 separates, an arc is generated between both contacts and the arc is stretched and extinguished. It turns off and becomes disconnected.
【0007】[0007]
【発明が解決しようとする課題】しかし、開路途中にお
いて図2(B)に示すようにアーク13がシールド7側
に点弧する場合がある。シールド7に点弧すると、この
アーク13により固定側シールド7の外表面が損傷し、
凹凸を生じ電界集中が起こって閃絡し易くなる。However, as shown in FIG. 2B, the arc 13 may ignite to the shield 7 side during the opening of the circuit. When the shield 7 is ignited, the arc 13 damages the outer surface of the fixed-side shield 7,
Concavities and convexities are generated, electric field concentration occurs, and flashover easily occurs.
【0008】固定側シールド7の外径を小さくして内径
を可動コンタクト11に近づけるとこの傾向はますます
大きくなり断路部の縮小化の阻害要因となっていた。When the outer diameter of the fixed side shield 7 is reduced and the inner diameter is brought closer to the movable contact 11, this tendency becomes more and more and it becomes an obstacle to the reduction of the disconnection portion.
【0009】即ち、シールド7への点弧を避けようとし
て図3に示すように外径を大きくした固定側シールド1
4を使用すれば、固定側シールド14と可動コンタクト
11の先端との間にアークは発生しないが、固定側シー
ルド14の外径が大きくなるために図4に示すように3
相分の断路器15,16,17を一括して取り付けよう
とすると母線管路の管18の外径をより大きなものにし
なければならないという問題を生ずる。That is, in order to avoid the ignition of the shield 7, the fixed-side shield 1 whose outer diameter is increased as shown in FIG.
If No. 4 is used, no arc is generated between the fixed-side shield 14 and the tip of the movable contact 11, but since the outer diameter of the fixed-side shield 14 becomes large, as shown in FIG.
If the disconnectors 15, 16 and 17 for the phases are to be attached together, there arises a problem that the outer diameter of the pipe 18 of the bus line must be made larger.
【0010】本発明は以上の点に鑑みてなされたもの
で、固定側シールドの外径を小さくすることができて、
かつ該固定側シールドの外表面と可動コンタクト先端と
の間にアークを生ずることがない断路器の提供を目的と
している。The present invention has been made in view of the above points, and it is possible to reduce the outer diameter of the fixed shield.
Moreover, it is an object of the present invention to provide a disconnector which does not generate an arc between the outer surface of the fixed side shield and the tip of the movable contact.
【0011】[0011]
【課題を解決するための手段】本発明における上記の課
題を解決するための手段は、固定コンタクトと,該固定
コンタクトを覆う固定側シールドと,前記固定コンタク
トに挿入して閉路する円柱状の可動コンタクトとを絶縁
ガス中に設けたガス断路器において、前記固定側シール
ドの外表面にテフロン等の耐熱性のフッ素樹脂から成る
絶縁物をコーティングする。Means for solving the above problems in the present invention include a fixed contact, a fixed shield for covering the fixed contact, and a cylindrical movable member which is inserted into the fixed contact to make a closed circuit. In a gas disconnecting switch provided with a contact in an insulating gas, the outer surface of the fixed side shield is coated with an insulator made of heat-resistant fluororesin such as Teflon.
【0012】また、前記可動コンタクトの先端に、先端
形状が半球状の突出部を形成して固定側シールドへの点
弧を防止し、小形化を可能とする。Further, a protrusion having a hemispherical tip shape is formed at the tip of the movable contact to prevent ignition to the fixed side shield, thereby enabling miniaturization.
【0013】[0013]
【作用】固定側シールドの可動コンタクトと対向する外
表面に耐熱性絶縁物をコーティングしてあるのでアーク
が固定側シールド間に点弧することはない。Since the outer surface of the fixed-side shield facing the movable contact is coated with a heat-resistant insulator, the arc does not ignite between the fixed-side shields.
【0014】また、可動コンタクトの先端に、可動コン
タクトの径より小径の半球状突出部を設けたので、アー
クは可動コンタクトの中心軸上の突出部に集まるため
に、アークは固定側コンタクト間に集中され、固定側シ
ールド外表面との間では点弧したり、またアークが固定
側シールドに移行することはない。Further, since the hemispherical protrusion having a diameter smaller than that of the movable contact is provided at the tip of the movable contact, the arc gathers on the protrusion on the central axis of the movable contact, so that the arc is present between the fixed contacts. It is concentrated and does not ignite between the outer surface of the fixed shield and the arc does not transfer to the fixed shield.
【0015】[0015]
【実施例】以下、本発明を図面に示す実施例に基づいて
説明する。なお本発明は従来のガス断路器の一部を改良
したものなので、従来と同一部分には同一符号を付して
説明を省略し、異なる部分のみを説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. Since the present invention is an improvement of a part of the conventional gas disconnecting switch, the same parts as those of the prior art are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.
【0016】図1は本発明の一実施例を示す要部断面図
で、同図において19は固定側シールド、20は固定側
シールド19の外表面にコーティングしたテフロン等の
耐熱性のフッ素樹脂から成る絶縁物で、このコーティン
グは、必ずしも固定側シールドの全外表面に設ける必要
はないが、少なくとも可動コンタクト21と対向する外
表面には設ける必要がある。21は円柱状の可動コンタ
クト、22は可動コンタクト21の先端に形成した半球
状の突出部で、球状の直径(最大)は可動コンタクト2
1の直径より小となす。23は固定コンタクト6と可動
コンタクト21との間に発生したアークである。FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention. In FIG. 1, 19 is a fixed side shield, and 20 is a heat-resistant fluororesin such as Teflon coated on the outer surface of the fixed side shield 19. This coating does not necessarily have to be provided on the entire outer surface of the fixed-side shield, but at least on the outer surface facing the movable contact 21. Reference numeral 21 is a cylindrical movable contact, 22 is a hemispherical protrusion formed at the tip of the movable contact 21, and the spherical diameter (maximum) is the movable contact 2
The diameter is less than 1. Reference numeral 23 is an arc generated between the fixed contact 6 and the movable contact 21.
【0017】開路時に可動コンタクト21が図1の右方
へ移動して固定コンタクト6から離れると、可動コンタ
クト21と固定コンタクト6との間にはアーク23を生
じ、該アーク23の一端は球状の突出部22に移行して
可動コンタクト21先端の中心軸上に集まり、他端は固
定コンタクト6の接触片4上を固定側シールド19に向
かって移行し消滅する。When the movable contact 21 moves to the right in FIG. 1 and separates from the fixed contact 6 when the circuit is opened, an arc 23 is generated between the movable contact 21 and the fixed contact 6, and one end of the arc 23 has a spherical shape. It moves to the protruding portion 22 and gathers on the central axis of the tip of the movable contact 21, and the other end moves on the contact piece 4 of the fixed contact 6 toward the fixed side shield 19 and disappears.
【0018】万一アーク23が固定側シールド19に点
弧したとしても高電界である外表面は耐熱性絶縁物20
によりコーティングされているために裏面の低電界面で
あり、アーク23の痕跡により固定側シールド19が耐
電圧低下を生ずることはない。 耐熱性絶縁物20がコ
ーティングされている固定側シールド19の外表面と、
可動コンタクト21との間にはアーク23を生じないか
ら、固定側シールド19の内径を小さくして可動コンタ
クト21の外径に近付け、固定側シールド19の外径を
接触片4の動作を妨げない最小寸法とすることができ
る。図1においては小さくした固定側シールド19の外
径に合わせて、固定ベース3,シリンダ8の外径をそれ
ぞれ小さくした場合の図を示してある。Even if the arc 23 ignites on the fixed side shield 19, the outer surface having a high electric field has a heat-resistant insulator 20.
Is a low electric field surface on the back surface, and the fixed-side shield 19 does not have a withstand voltage drop due to the trace of the arc 23. An outer surface of the fixed-side shield 19 coated with the heat-resistant insulator 20,
Since no arc 23 is generated between the movable contact 21 and the movable contact 21, the inner diameter of the fixed shield 19 is reduced to approach the outer diameter of the movable contact 21, and the outer diameter of the fixed shield 19 does not hinder the operation of the contact piece 4. It can be the smallest dimension. FIG. 1 shows a case where the outer diameters of the fixed base 3 and the cylinder 8 are made smaller in accordance with the outer diameter of the fixed shield 19 which is made smaller.
【0019】このように固定側シールド19の外径が小
さくなると、3相を一括化した場合の管路径を小さくす
ることができ、より縮小化された絶縁開閉装置の提供が
可能となる。さらに、管路を小さくすることができるた
め管路および管路に付属する部品類も小形化され価格の
低減に対する効果も大きなものがある。When the outer diameter of the fixed-side shield 19 is reduced in this way, the diameter of the conduit when the three phases are integrated can be reduced, and a more compact insulated switchgear can be provided. Further, since the pipeline can be made small, the pipeline and the parts attached to the pipeline are also downsized, and there is a great effect on the cost reduction.
【0020】[0020]
【発明の効果】以上の説明からわかるように本発明に係
るガス断路器は、固定コンタクトを覆う固定側シールド
の外表面に耐熱性絶縁物をコーティングし、また可動コ
ンタクトの先端に先端形状が球状の突出部を設けて、発
生したアークが可動コンタクトの中心軸上に集まるよう
にしたので、前記固定側シールドの高電界面へアークが
点弧することはなく、固定側シールドの内径を可動コン
タクトの外径に近付けて、その内径を小さくすることに
より固定側シールドの外径を小さくすることができるか
ら、母線管路の管外径を小さくすることができて、より
縮小化された低価格のガス絶縁開閉装置の提供が可能に
なるという優れた効果を奏するものである。As can be seen from the above description, in the gas disconnector according to the present invention, the outer surface of the fixed-side shield that covers the fixed contact is coated with a heat-resistant insulator, and the tip of the movable contact has a spherical tip shape. Since the generated arc is concentrated on the central axis of the movable contact, the arc does not ignite to the high electric field surface of the fixed side shield, and the inner diameter of the fixed side shield is set to the movable contact. The outer diameter of the fixed-side shield can be reduced by bringing it closer to the outer diameter of the bus, and the outer diameter of the fixed-side shield can be reduced. It has an excellent effect that it is possible to provide the gas insulated switchgear.
【図1】本発明の一実施例の要部断面図。FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.
【図2】従来例の説明図。(A)は閉路状態、(B)は
開路途中状態を示す。FIG. 2 is an explanatory diagram of a conventional example. (A) shows a closed state, and (B) shows an open state.
【図3】従来例の説明図。FIG. 3 is an explanatory diagram of a conventional example.
【図4】断路器を管路母線に適用した場合の説明図。FIG. 4 is an explanatory diagram when a disconnector is applied to a pipeline busbar.
6…固定コンタクト 19…固定側シールド 20…絶縁物 21…可動コンタクト 22…球状の突出部 6 ... Fixed contact 19 ... Fixed side shield 20 ... Insulator 21 ... Movable contact 22 ... Spherical protrusion
Claims (2)
覆う固定側シールドと、前記固定コンタクトに挿出入さ
れる円柱状の可動コンタクトとを絶縁ガス中に設けたガ
ス断路器において、 前記固定側シールドの少なくとも可動コンタクトとの対
向側表面にフッ素樹脂等の耐熱性の絶縁物をコーティン
グしたことを特徴とするガス断路器。1. A gas disconnecting switch, comprising: a fixed contact; a fixed shield that covers the fixed contact; and a cylindrical movable contact that is inserted into and removed from the fixed contact in an insulating gas. A gas disconnecting switch, characterized in that at least the surface facing the movable contact is coated with a heat-resistant insulator such as a fluororesin.
クトの径より小径の半球状の突出部を設けたことを特徴
とする請求項1記載のガス断路器。2. The gas disconnector according to claim 1, wherein a hemispherical protrusion having a diameter smaller than the diameter of the movable contact is provided at the tip of the movable contact.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3893994A JPH07249351A (en) | 1994-03-10 | 1994-03-10 | Gas filled breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3893994A JPH07249351A (en) | 1994-03-10 | 1994-03-10 | Gas filled breaker |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07249351A true JPH07249351A (en) | 1995-09-26 |
Family
ID=12539203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3893994A Pending JPH07249351A (en) | 1994-03-10 | 1994-03-10 | Gas filled breaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07249351A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6831828B2 (en) | 2002-11-19 | 2004-12-14 | Tmt&D Corporation | Gas-insulated switchgear |
JP2008071540A (en) * | 2006-09-12 | 2008-03-27 | Energy Support Corp | Movable electrode of power distribution apparatus |
JP2010178526A (en) * | 2009-01-30 | 2010-08-12 | Mitsubishi Electric Corp | Tank type vacuum breaker |
JP2021190251A (en) * | 2020-05-28 | 2021-12-13 | 株式会社日立製作所 | Switchgear |
-
1994
- 1994-03-10 JP JP3893994A patent/JPH07249351A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6831828B2 (en) | 2002-11-19 | 2004-12-14 | Tmt&D Corporation | Gas-insulated switchgear |
JP2008071540A (en) * | 2006-09-12 | 2008-03-27 | Energy Support Corp | Movable electrode of power distribution apparatus |
JP4680856B2 (en) * | 2006-09-12 | 2011-05-11 | エナジーサポート株式会社 | Movable electrodes of power distribution equipment |
JP2010178526A (en) * | 2009-01-30 | 2010-08-12 | Mitsubishi Electric Corp | Tank type vacuum breaker |
JP2021190251A (en) * | 2020-05-28 | 2021-12-13 | 株式会社日立製作所 | Switchgear |
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