JPH11283473A - Switch device - Google Patents
Switch deviceInfo
- Publication number
- JPH11283473A JPH11283473A JP8179098A JP8179098A JPH11283473A JP H11283473 A JPH11283473 A JP H11283473A JP 8179098 A JP8179098 A JP 8179098A JP 8179098 A JP8179098 A JP 8179098A JP H11283473 A JPH11283473 A JP H11283473A
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- movable
- electrode
- conductor
- vacuum vessel
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H2033/6668—Operating arrangements with a plurality of interruptible circuit paths in single vacuum chamber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/003—Earthing switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、配電系統に用い
られる開閉装置に関するもので、特に真空容器中に主回
路開閉部と接地開閉部とを有している開閉装置や、真空
容器が接地されているような真空開閉装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchgear used in a power distribution system, and more particularly to a switchgear having a main circuit switchgear and a ground switchgear in a vacuum vessel, and a vacuum vessel grounded. And a vacuum switchgear as described above.
【０００２】[0002]
【従来の技術】図９は例えば実公昭５５−１７１９３１
号公報に記載された真空開閉装置である遮断器の構造を
示す図である。図において、１は真空容器、２は固定導
体、３は固定導体２の先端部に固定された固定電極、４
は固定導体２と同一軸線上に設けられた可動導体、５は
可動導体４の先端部に固定され固定電極３と接離可動な
可動電極、７は接地ロッド、９は接地ロッド７に接続さ
れ可動電極５に対向した接地電極、１０は真空容器１の
一端部に固定された固定端板、１１は真空容器１の他端
部に固定された可動端板、８は一端部が可動導体４の周
面に固定され他端部が可動端板１１に固定されたベロー
ズである。2. Description of the Related Art FIG. 9 is, for example, Japanese Utility Model Publication No. 55-171931.
FIG. 1 is a diagram showing a structure of a circuit breaker, which is a vacuum switchgear described in Japanese Unexamined Patent Publication. In the figure, 1 is a vacuum vessel, 2 is a fixed conductor, 3 is a fixed electrode fixed to the tip of the fixed conductor 2, 4
Is a movable conductor provided on the same axis as the fixed conductor 2, 5 is a movable electrode fixed to the tip of the movable conductor 4 and movable toward and away from the fixed electrode 3, 7 is a ground rod, and 9 is connected to the ground rod 7. The ground electrode facing the movable electrode 5 is a fixed end plate fixed to one end of the vacuum vessel 1, 11 is a movable end plate fixed to the other end of the vacuum vessel 1, 8 is a movable conductor 4 at one end. And a bellows whose other end is fixed to the movable end plate 11.
【０００３】上記構成の遮断器では、固定導体２から可
動導体４へ流れる電流を遮断する場合には、可動導体４
及び可動電極５が図中で可動導体４の下側にある駆動機
構（図示せず）によって駆動される。この結果、固定電
極３と可動電極５との間にアークが発生し、電流ゼロに
なった時点でアークが消滅して電流が遮断される。電流
遮断後、更に可動導体４及び可動電極５を図中下側へ駆
動すると、可動電極５の接地電極９と対向する部分が接
地電極９と接触し、可動導体４と接続された外部回路
（図示せず）が接地電極９、接地ロッド７を介して接地
される。[0003] In the circuit breaker having the above configuration, when the current flowing from the fixed conductor 2 to the movable conductor 4 is interrupted, the movable conductor 4
The movable electrode 5 is driven by a drive mechanism (not shown) below the movable conductor 4 in the figure. As a result, an arc is generated between the fixed electrode 3 and the movable electrode 5, and when the current becomes zero, the arc disappears and the current is cut off. When the movable conductor 4 and the movable electrode 5 are further driven downward in the figure after the current interruption, the portion of the movable electrode 5 facing the ground electrode 9 comes into contact with the ground electrode 9 and the external circuit ( (Not shown) is grounded via a ground electrode 9 and a ground rod 7.
【０００４】[0004]
【発明が解決しようとする課題】従来の遮断器は以上の
ように構成されているので、特に短絡電流などの大電流
を遮断する際に、固定電極３と可動電極５との間に発生
したアークによって、固定導体２、固定電極３、可動導
体４及び可動電極５で構成される主回路開閉部と、接地
ロッド７及び接地電極９で構成される接地開閉部との間
で絶縁性能が低下して、主回路開閉部と接地開閉部とが
アークによってつながり、主回路開閉部が地絡してしま
うといった問題点があった。Since the conventional circuit breaker is configured as described above, the circuit breaker is generated between the fixed electrode 3 and the movable electrode 5 particularly when a large current such as a short-circuit current is cut off. Due to the arc, the insulation performance between the main circuit opening / closing section composed of the fixed conductor 2, the fixed electrode 3, the movable conductor 4 and the movable electrode 5, and the ground switching section composed of the ground rod 7 and the ground electrode 9 is reduced. Then, there is a problem that the main circuit switch and the ground switch are connected by an arc, and the main circuit switch is grounded.
【０００５】この発明は、このような問題点を解決する
ことを課題とするものであって、主回路開閉部を流れる
電流を遮断する際に発生するアークによって、主回路開
閉部が地絡事故を起こすようなことのない開閉装置を得
ることを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and an arc generated when an electric current flowing through a main circuit switching unit is interrupted causes a ground fault in the main circuit switching unit. The purpose of the present invention is to obtain a switchgear that does not cause a problem.
【０００６】[0006]
【課題を解決するための手段】この発明の請求項１に係
る開閉装置は、真空容器と、この真空容器内に先端部が
臨んでいる固定導体と、この固定導体の先端部に固定さ
れた固定電極と、この固定電極に接離可能な可動電極
と、この可動電極に先端部に固定された可動導体と、こ
の可動導体及び前記固定電極を囲って設けられ固定電極
から可動電極が開離したときに生じたアークを構成する
粒子が周囲に飛散するのを防止したシールド体とを備え
たものである。According to a first aspect of the present invention, there is provided an opening / closing device, comprising: a vacuum vessel; a fixed conductor whose front end faces the vacuum vessel; and a fixed conductor fixed to the front end of the fixed conductor. A fixed electrode, a movable electrode that can be brought into contact with and separated from the fixed electrode, a movable conductor fixed to the tip of the movable electrode, and a movable electrode separated from the fixed electrode provided around the movable conductor and the fixed electrode. And a shield member which prevents particles constituting the arc generated when the arc is generated from scattering around.
【０００７】また、請求項２に係る開閉装置では、シー
ルド体は、固定導体に支持された筒状で絶縁性の保持部
の内側に設けられたものである。In the switchgear according to the second aspect, the shield body is provided inside a cylindrical insulating holding portion supported by the fixed conductor.
【０００８】また、請求項３に係る開閉装置では、固定
側プレートは、中心部が固定導体に固定され、外周部が
保持部の一端部に固定されている。Further, in the switching device according to the third aspect, the fixed side plate has a central portion fixed to the fixed conductor, and an outer peripheral portion fixed to one end of the holding portion.
【０００９】また、請求項４に係る開閉装置では、可動
側プレートは、可動導体が貫通した貫通孔を有するとと
もに外周部が保持部の他端部に固定されている。Further, in the switching device according to the fourth aspect, the movable side plate has a through hole through which the movable conductor penetrates, and the outer peripheral portion is fixed to the other end of the holding portion.
【００１０】また、請求項５に係る開閉装置では、ベロ
ーズは、一端部が可動側プレートの貫通孔の周縁部に固
定され、他端部が可動導体の周面に固定されている。Further, in the opening and closing device according to the fifth aspect, the bellows has one end fixed to the peripheral edge of the through hole of the movable plate and the other end fixed to the peripheral surface of the movable conductor.
【００１１】また、請求項６に係る開閉装置では、シー
ルド体は、絶縁性の保持部を介して真空容器で支持され
ている。Further, in the switching device according to claim 6, the shield body is supported by the vacuum vessel via the insulating holding portion.
【００１２】また、請求項７に係る開閉装置では、シー
ルド体は、固定導体を真空容器に保持した絶縁端子筒で
支持されている。Further, in the switching device according to claim 7, the shield body is supported by the insulated terminal tube in which the fixed conductor is held in the vacuum vessel.
【００１３】また、請求項８に係る開閉装置では、シー
ルド体の可動導体側の端部に取り付けられ可動導体が貫
通した貫通孔を有するベローズ取り付け板と、このベロ
ーズ取り付け板の前記貫通孔の周縁部に一端部が固定さ
れ他端部が可動導体の周面に固定されたベローズとを備
えたものである。Further, in the switching device according to the present invention, a bellows mounting plate which is attached to an end of the shield body on the movable conductor side and has a through hole through which the movable conductor penetrates, and a peripheral edge of the through hole of the bellows mounting plate. And a bellows having one end fixed to the portion and the other end fixed to the peripheral surface of the movable conductor.
【００１４】また、請求項９に係る開閉装置では、真空
容器内において、可動電極及び固定電極のうち、地絡す
る虞れが大きい領域側に位置した一方の電極の直径を他
方の電極よりも大きくしたものである。[0014] In the opening and closing device according to the ninth aspect, the diameter of one of the movable electrode and the fixed electrode, which is located on the side of the region where the risk of ground fault is greater, is set larger than that of the other electrode. It is a big one.
【００１５】また、請求項１０に係る開閉装置では、シ
ールド体は金属製である。[0015] In the switching device according to the tenth aspect, the shield body is made of metal.
【００１６】[0016]
【発明の実施の形態】実施の形態１．図１はこの発明の
実施の形態１による開閉装置である遮断器の断面図であ
る。図において、２０は内部を真空に保つことが可能な
真空容器、２は真空容器２０の外から真空容器２０の内
部へ電流を流すための第１の固定導体、２５は第１の固
定導体２を真空容器２０と電気的に絶縁して支持し、か
つ内部の真空を保つことを可能にした第１の絶縁端子
筒、３は第１の固定導体２の先端部に固定された固定電
極、５は固定電極３と接離可能な可動電極、４は可動電
極５が先端部に固定された可動導体、３４は可動導体４
の他端部に固定された可撓導体接続部、２７は可撓導体
接続部３４に一端部が接続された可撓導体、２２は可撓
導体２７の他端部が接続された第２の固定導体、２６は
第２の固定導体２２を真空容器２０と電気的な絶縁を保
って支持し、かつ真空容器２０の真空を保つことを可能
にした第２の絶縁端子筒、２３は可動電極５を固定電極
３と接離させるための駆動機構部（図示せず）と連結さ
れた操作棒、２１は可撓導体接続部３４と操作棒２３と
を絶縁する絶縁ロッド、８は操作棒２３が貫通した貫通
孔４０の周縁部に一端部が固定され他端部が操作棒２３
の周面に固定されているとともに、操作棒２３の上下動
に対しても真空容器２０の真空を保つためのベローズ、
１２は第２の固定導体２２の先端部に固定された固定接
地電極、９は固定接地電極１２と接離可能な可動接地電
極、７は端部が接地操作部（図示せず）に連結され、か
つ固定接地電極１２に可動接地電極９を接触可能にする
接地ロッド、２４は接地ロッド７が貫通した貫通孔４１
の周縁部に一端部が固定され他端部が接地ロッド７の周
面に固定されているとともに、接地ロッド７の上下動に
対しても真空容器２０の真空を保つベローズである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view of a circuit breaker which is a switchgear according to Embodiment 1 of the present invention. In the figure, reference numeral 20 denotes a vacuum vessel capable of keeping the inside vacuum, 2 denotes a first fixed conductor for flowing a current from outside the vacuum vessel 20 to the inside of the vacuum vessel 20, and 25 denotes a first fixed conductor 2 Are electrically insulated from the vacuum container 20 and supported, and a first insulating terminal tube 3 that enables the internal vacuum to be maintained is a fixed electrode fixed to the distal end of the first fixed conductor 2. Reference numeral 5 denotes a movable electrode that can be brought into contact with and separated from the fixed electrode 3, 4 denotes a movable conductor having the movable electrode 5 fixed to the tip, and 34 denotes a movable conductor 4.
, A flexible conductor 27 having one end connected to the flexible conductor connection 34, and a second conductor 22 having the other end connected to the flexible conductor 27. The fixed conductor 26 supports the second fixed conductor 22 while maintaining electrical insulation from the vacuum container 20, and a second insulating terminal tube capable of maintaining the vacuum of the vacuum container 20. An operation rod connected to a drive mechanism (not shown) for bringing the 5 into and out of contact with the fixed electrode 3, 21 is an insulating rod for insulating the flexible conductor connection portion 34 from the operation rod 23, and 8 is an operation rod 23 One end is fixed to the peripheral portion of the through hole 40 through which the control rod 23 is inserted.
A bellows, which is fixed to the peripheral surface of the
Reference numeral 12 denotes a fixed ground electrode fixed to the tip of the second fixed conductor 22, 9 denotes a movable ground electrode that can be brought into contact with and separated from the fixed ground electrode 12, and 7 denotes an end connected to a ground operation unit (not shown). And a grounding rod for allowing the movable grounding electrode 9 to come into contact with the fixed grounding electrode 12, and 24 is a through hole 41 through which the grounding rod 7 penetrates.
Is a bellows whose one end is fixed to the periphery and the other end is fixed to the peripheral surface of the grounding rod 7, and which keeps the vacuum of the vacuum vessel 20 even when the grounding rod 7 moves up and down.
【００１７】３２は中心部が第１の固定導体２に固定さ
れた固定側プレート、３０は円盤状で金属製の固定側プ
レート３２の周縁部に固定されたセラミックからなる円
筒形状の保持部、３１は保持部３０の突起部３０ａで係
止され、また突起部３０ａ以外では若干の隙間をもつス
テンレスからなるシールド体、３３は保持部３０の端部
に周縁部が固定された可動側プレートで、可動側プレー
ト３３には可動導体４と接触しない程度の貫通孔４２が
形成されている。なお、図１では、固定電極３と可動電
極５とは開極状態にあり、同じく可動接地電極９と固定
接地電極１２も開極状態にある。Reference numeral 32 denotes a fixed-side plate having a central portion fixed to the first fixed conductor 2, 30 denotes a cylindrical holding portion made of ceramic fixed to a peripheral portion of the fixed-side plate 32 made of a disc-shaped metal, Reference numeral 31 denotes a shield body made of stainless steel which is locked by the protrusion 30a of the holder 30 and has a slight gap except for the protrusion 30a. Reference numeral 33 denotes a movable side plate having a peripheral portion fixed to an end of the holder 30. The movable side plate 33 is formed with a through hole 42 that does not contact the movable conductor 4. In FIG. 1, the fixed electrode 3 and the movable electrode 5 are in the open state, and the movable ground electrode 9 and the fixed ground electrode 12 are also in the open state.
【００１８】上記構成の遮断器では、第１の固定導体２
から第２の固定導体２２へ電流が流れている状態、即ち
通電状態では固定電極３と可動電極５は接触しており、
固定接地電極１２と可動接地電極９とは開極状態にあ
る。遮断時では駆動機構部（図示せず）によって操作棒
２３、絶縁ロッド２１、可撓導体接続部３４、可動導体
４、可動電極５は図中下方向に駆動され、固定電極３と
可動電極５とが開離して電極物質を含むアークが固定電
極３と可動電極５との間に発生する。電流はこれら駆動
部分の動きに追従可能な可撓導体２７を介して第２の固
定導体２２へ流れる。このアークには、イオン、原子、
電子や電極物質が溶融したドロップレットと呼ばれる塊
が含まれている。これらアークを構成する粒子は電流が
流れている間中、各電極３、５から供給され続ける。こ
のアークを構成する粒子は固定電極３と可動電極５との
間の空間から、外側に向かって拡散する。しかし、この
拡散する粒子は、固定側プレート３２、可動側プレート
３３及び保持部３０によって構成される空間に閉じ込め
られ、この空間の外部へは到達しない。この結果、アー
クは、固定電極３及び可動電極５の付近だけに存在し、
電流ゼロ点で消滅し、電流は遮断される。In the circuit breaker having the above configuration, the first fixed conductor 2
In a state where current flows from the second fixed conductor 22 to the second fixed conductor 22, that is, in a conducting state, the fixed electrode 3 and the movable electrode 5 are in contact with each other,
The fixed ground electrode 12 and the movable ground electrode 9 are open. At the time of disconnection, the operating rod 23, the insulating rod 21, the flexible conductor connecting portion 34, the movable conductor 4, and the movable electrode 5 are driven downward by a drive mechanism (not shown), and the fixed electrode 3 and the movable electrode 5 are driven. Are separated and an arc containing the electrode substance is generated between the fixed electrode 3 and the movable electrode 5. The current flows to the second fixed conductor 22 via the flexible conductor 27 that can follow the movement of these driving parts. This arc contains ions, atoms,
It contains lumps called droplets in which electrons and electrode materials are melted. The particles constituting these arcs are continuously supplied from the electrodes 3 and 5 while the current is flowing. Particles constituting the arc diffuse outward from the space between the fixed electrode 3 and the movable electrode 5. However, the diffusing particles are confined in a space formed by the fixed side plate 32, the movable side plate 33, and the holding unit 30, and do not reach the outside of this space. As a result, the arc exists only near the fixed electrode 3 and the movable electrode 5,
It disappears at the zero current point and the current is cut off.
【００１９】なお、円筒形状の保持部３０は絶縁物で構
成され、かつ保持部３０の内壁面はシールド体で覆われ
ているので、固定電極３と可動電極５との間で生じたア
ークを構成する粒子は保持部３０の内壁面に付着するこ
となく、アークが発生した後でも、固定側プレート３２
と可動側プレート３３とは保持部３０を介して電気的に
絶縁が保たれている。また、電流遮断後、固定電極３と
可動電極５とが離れており、第１の固定導体２と第２の
固定導体２２とが電気的に切り離された状態で、第２の
固定導体２２につながれた図示していない外部回路を接
地する場合は、図示していない接地操作部によって接地
ロッド７及び可動接地電極９を図中で上方に駆動させ、
可動接地電極９を固定接地電極１２に接触させる。この
結果、外部回路は、接地ロッド７に接続された接地回路
（図示せず）と接続され、接地される。Since the cylindrical holding portion 30 is made of an insulating material and the inner wall surface of the holding portion 30 is covered with a shield, an arc generated between the fixed electrode 3 and the movable electrode 5 is prevented. The constituent particles do not adhere to the inner wall surface of the holding unit 30, and even after the arc is generated, the fixed side plate 32
The movable plate 33 is electrically insulated from the movable plate 33 via the holding unit 30. After the current is cut off, the fixed electrode 3 and the movable electrode 5 are separated from each other, and the first fixed conductor 2 and the second fixed conductor 22 are electrically separated from each other. When the connected external circuit (not shown) is grounded, the ground rod 7 and the movable ground electrode 9 are driven upward in the figure by a ground operation unit (not shown),
The movable ground electrode 9 is brought into contact with the fixed ground electrode 12. As a result, the external circuit is connected to a ground circuit (not shown) connected to the ground rod 7 and is grounded.
【００２０】以上のように、この実施の形態１の遮断器
によれば、電流遮断時に固定電極３と可動電極５との間
に発生したアークによる粒子は固定側プレート３２、保
持部３０、可動側プレー ト３３で構成された空間以外
には漏れないので、遮断時のアークによって第１の固定
導体２から第２の固定導体２２に至る主回路開閉部と、
真空容器２０や接地回路との間での絶縁低下を防止で
き、主回路開閉部と真空容器２０や接地回路との間での
地絡の発生を防止できる。As described above, according to the circuit breaker of the first embodiment, the particles generated by the arc generated between the fixed electrode 3 and the movable electrode 5 when the current is interrupted are removed by the fixed plate 32, the holding section 30, and the movable section. The main circuit opening / closing section from the first fixed conductor 2 to the second fixed conductor 22 by an arc at the time of interruption because there is no leakage to the space other than the space formed by the side plate 33;
It is possible to prevent a decrease in insulation between the vacuum vessel 20 and the ground circuit, and to prevent occurrence of a ground fault between the main circuit switching unit and the vacuum vessel 20 and the ground circuit.
【００２１】実施の形態２．図２はこの発明の実施の形
態２の遮断器の断面図である。この実施の形態では、可
動側プレートである可動側プレート３３の貫通孔４２の
周縁部にベローズ３５の一端部が固定され、可動導体４
の周面にベローズ３５の他端部が固定されている。その
他の構成は実施の形態１と同様である。Embodiment 2 FIG. FIG. 2 is a sectional view of a circuit breaker according to Embodiment 2 of the present invention. In this embodiment, one end of the bellows 35 is fixed to the peripheral portion of the through hole 42 of the movable side plate 33 which is a movable side plate, and the movable conductor 4
The other end of the bellows 35 is fixed to the peripheral surface of the bellows 35. Other configurations are the same as those of the first embodiment.
【００２２】この実施の形態では、可動側プレート３３
と可動導体４との間にベローズ３５が介在しているの
で、遮断時の固定電極３と可動電極５との間に発生した
アークの粒子が可動側プレート３３の貫通孔４２から外
部に漏れることはない。従って、この実施の形態２によ
れば、遮断時の固定電極３と可動電極５との間に発生し
たアークによって主回路開閉部が地絡することを更に確
実に防止できる。In this embodiment, the movable plate 33
Since the bellows 35 is interposed between the movable electrode 4 and the movable conductor 4, particles of the arc generated between the fixed electrode 3 and the movable electrode 5 at the time of interruption are leaked from the through hole 42 of the movable side plate 33 to the outside. There is no. Therefore, according to the second embodiment, it is possible to more reliably prevent the grounding of the main circuit opening / closing section due to the arc generated between the fixed electrode 3 and the movable electrode 5 at the time of interruption.
【００２３】実施の形態３．図３はこの発明の実施の形
態３の遮断器の正断面図、図４は図３の遮断器の側断面
図で示す。図において、４４は略円筒形状でステンレス
で構成されたシールド体であり、両端部が内側に折曲さ
れている。このシールド体４４は真空容器２０にセラミ
ックからなる保持部４３を介して２箇所で固定されてい
る。その他の構成は実施の形態１と同様であり、その説
明は省略する。Embodiment 3 FIG. FIG. 3 is a front sectional view of a circuit breaker according to Embodiment 3 of the present invention, and FIG. 4 is a side sectional view of the circuit breaker of FIG. In the figure, reference numeral 44 denotes a substantially cylindrical shield body made of stainless steel, and both ends are bent inward. The shield body 44 is fixed to the vacuum vessel 20 at two places via a holding portion 43 made of ceramic. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.
【００２４】この実施の形態では、実施の形態１の遮断
器と同様に、可動電極５と固定電極３との間に発生した
アークの粒子はシールド体４４によって真空容器２０や
接地電極９、１２へ飛散することが防止され、またシー
ルド体４４にアークの粒子が到達してもシールド体４４
は主回路開閉部や真空容器２０から絶縁されているの
で、遮断時の固定電極３と可動電極５との間に発生した
アークによって主回路開閉部が地絡することを防止でき
る。In this embodiment, similarly to the circuit breaker of the first embodiment, the particles of the arc generated between the movable electrode 5 and the fixed electrode 3 are shielded by the shield body 44 to form the vacuum vessel 20 and the ground electrodes 9 and 12. To the shield body 44 even if the particles of the arc reach the shield body 44.
Is insulated from the main circuit opening / closing section and the vacuum vessel 20, it is possible to prevent the main circuit opening / closing section from being ground-faulted by an arc generated between the fixed electrode 3 and the movable electrode 5 during interruption.
【００２５】実施の形態４．図５はこの発明の実施の形
態４による遮断器を示す断面図である。図において、４
５は略円筒形状のシールド体であり、このシールド体４
５の両端は内側へ折曲されている。このシールド体４５
の一端部は、第１の絶縁端子筒２５に固定されている。
このシールド体４５の他端部は、可動導体４、可動電極
５と接触しない形状となっている。その他の構成は実施
の形態１と同様であり、その説明は省略する。Embodiment 4 FIG. 5 is a sectional view showing a circuit breaker according to Embodiment 4 of the present invention. In the figure, 4
Reference numeral 5 denotes a substantially cylindrical shield body.
The both ends of 5 are bent inward. This shield body 45
Is fixed to the first insulating terminal tube 25.
The other end of the shield body 45 has a shape that does not contact the movable conductor 4 and the movable electrode 5. Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.
【００２６】この実施の形態では、実施の形態１と同様
に、可動電極５と固定電極３との間に発生したアークの
粒子はシールド体４５によって真空容器２０や接地電極
９、１２へ飛散することが防止される。また、シールド
体４５に粒子が到達しても、シールド体４５は、第１の
固定導体２、真空容器２０及び可動導体４と電気的に絶
縁されているので、遮断時の固定電極３と可動電極５と
の間に発生したアークによって主回路開閉部が地絡する
ことを防止できる。In this embodiment, as in the first embodiment, the particles of the arc generated between the movable electrode 5 and the fixed electrode 3 are scattered by the shield body 45 to the vacuum vessel 20 and the ground electrodes 9 and 12. Is prevented. Even if the particles reach the shield body 45, the shield body 45 is electrically insulated from the first fixed conductor 2, the vacuum vessel 20, and the movable conductor 4, so that the shield body 45 is movable with the fixed electrode 3 at the time of interruption. It is possible to prevent the main circuit opening / closing section from grounding due to the arc generated between the electrode 5 and the electrode 5.
【００２７】実施の形態５．図６にこの発明の実施の形
態５による遮断器を示す断面図である。図において、４
６は一端部が第１の絶縁端子筒２５に取り付けられたシ
ールド体、３６はシールド体４６の他端部に取り付けら
れた絶縁物からなる円板形状のベローズ取り付け板、３
５は一端部がベローズ取り付け板３６の貫通孔４７の周
縁部に固定され、他端部が可動導体４の周面に固定され
たベローズである。その他の構成は実施の形態４と同じ
であり、その説明は省略する。Embodiment 5 FIG. FIG. 6 is a sectional view showing a circuit breaker according to Embodiment 5 of the present invention. In the figure, 4
Reference numeral 6 denotes a shield body having one end attached to the first insulating terminal tube 25; 36, a disk-shaped bellows attachment plate made of an insulator attached to the other end of the shield body 46;
Reference numeral 5 denotes a bellows having one end fixed to the peripheral edge of the through hole 47 of the bellows mounting plate 36 and the other end fixed to the peripheral surface of the movable conductor 4. Other configurations are the same as those of the fourth embodiment, and a description thereof will be omitted.
【００２８】この実施の形態では、電流遮断時に固定電
極３と可動電極５との間に発生したアークの粒子がシー
ルド体４６、ベローズ取り付け板３６及びベローズ３５
によって囲まれた空間から外部に飛散するようなことは
ない。従って、電流遮断時に電極３、５間に発生するア
ークによって、主回路開閉部と、真空容器２０及び接地
回路とが橋絡して、地絡事故に至ることを防止できる。In this embodiment, the particles of the arc generated between the fixed electrode 3 and the movable electrode 5 when the current is interrupted are generated by the shield 46, the bellows mounting plate 36 and the bellows 35.
It does not fly out of the space surrounded by. Therefore, it is possible to prevent the main circuit opening / closing section, the vacuum vessel 20 and the grounding circuit from being bridged by the arc generated between the electrodes 3 and 5 when the current is interrupted, thereby leading to a ground fault.
【００２９】実施の形態６．図７はこの発明の実施の形
態６の遮断器の要部断面図である。図において、ｄは固
定電極４８の直径、Ｄは可動電極４９の直径を示してお
り、ｄ＜Ｄとなるように構成されている。その他の構成
は、例えば実施の形態１と同様であり、その説明は省略
する。Embodiment 6 FIG. FIG. 7 is a sectional view of a main part of a circuit breaker according to Embodiment 6 of the present invention. In the figure, d indicates the diameter of the fixed electrode 48, and D indicates the diameter of the movable electrode 49, and is configured so that d <D. Other configurations are the same as those in the first embodiment, for example, and the description thereof is omitted.
【００３０】この実施の形態では、図８に示すように、
固定電極４８から噴出するアークはθ3の広がりを持
ち、可動電極４９からのアークの広がりはθ4の広がり
を持つ。そして、固定電極４８から吹き出したアークは
ほとんどが可動電極４９の表面に到達するが、可動電極
４９から下側、即ち可動導体４側へは可動電極４９で覆
われており、到達しない。一方、可動電極４９から吹き
出したアークは固定電極４８の周辺へ到達する。従っ
て、主回路開閉部が地絡するおそれのある例えば真空容
器２０や接地電極９、１２等が存在する側にある電極４
９の直径を大きくすることによって、アークの粒子が真
空容器２０や接地電極９、１２等に到達する量を低減さ
せることができ、主回路開閉部の地絡を防止することが
できる。なお、この実施の形態６では固定電極４８が可
動電極４９よりも直径が小さい場合について説明した
が、固定電極が可動電極より直径が大きい場合もあり、
この関係は遮断器の全体構成によって決定すればよい。In this embodiment, as shown in FIG.
The arc ejected from the fixed electrode 48 has a spread of θ 3 , and the spread of the arc from the movable electrode 49 has a spread of θ 4 . Most of the arc blown out from the fixed electrode 48 reaches the surface of the movable electrode 49, but the lower side from the movable electrode 49, that is, the movable conductor 4 side, is covered with the movable electrode 49 and does not reach. On the other hand, the arc blown out from the movable electrode 49 reaches around the fixed electrode 48. Therefore, for example, the electrode 4 on the side where the vacuum vessel 20 and the ground electrodes 9, 12 and the like where the main circuit opening / closing section may be grounded is present.
By increasing the diameter of 9, it is possible to reduce the amount of arc particles reaching the vacuum vessel 20, the ground electrodes 9, 12 and the like, and to prevent a ground fault at the main circuit opening / closing section. Although the case where the fixed electrode 48 has a smaller diameter than the movable electrode 49 has been described in the sixth embodiment, the fixed electrode may have a larger diameter than the movable electrode.
This relationship may be determined according to the overall configuration of the circuit breaker.
【００３１】[0031]
【発明の効果】以上説明したように、この発明の請求項
１に係る開閉装置によれば、真空容器と、この真空容器
内に先端部が臨んでいる固定導体と、この固定導体の先
端部に固定された固定電極と、この固定電極に接離可能
な可動電極と、この可動電極に先端部に固定された可動
導体と、この可動導体及び前記固定電極を囲って設けら
れ固定電極から可動電極が開離したときに生じたアーク
を構成する粒子が周囲に飛散するのを防止したシールド
体とを備えたので、電流遮断時に固定電極と可動電極と
の間に発生したアークによって、主回路開閉部が真空容
器等に地絡することを防止できる。As described above, according to the opening / closing device according to the first aspect of the present invention, the vacuum vessel, the fixed conductor whose front end faces the vacuum vessel, and the front end of the fixed conductor A fixed electrode fixed to the movable electrode, a movable electrode that can be brought into contact with and separated from the fixed electrode, a movable conductor fixed to the tip of the movable electrode, and a movable electrode provided around the movable conductor and the fixed electrode and movable from the fixed electrode. The shield circuit prevents the particles that constitute the arc generated when the electrodes are separated from flying around, so that the arc generated between the fixed electrode and the movable electrode when the current is interrupted causes the main circuit to break. The opening / closing section can be prevented from grounding to a vacuum vessel or the like.
【００３２】また、請求項２に係る開閉装置によれば、
シールド体は、固定導体に支持された筒状で絶縁性の保
持部の内側に設けられたので、シールド体は周囲と絶縁
状態で確実に保持部で保持される。Further, according to the switching device of the second aspect,
Since the shield body is provided inside the cylindrical insulating holding part supported by the fixed conductor, the shield body is securely held by the holding part in an insulated state from the surroundings.
【００３３】また、請求項３に係る開閉装置によれば、
固定側プレートは、中心部が固定導体に固定され、外周
部が保持部の一端部に固定されているので、保持部は固
定側プレートを介して確実に固定導体に支持される。ま
た、固定導体側へのアークの粒子の飛散は固定側プレー
トで確実に防止される。[0033] According to the switching device of the third aspect,
Since the fixed side plate has a center portion fixed to the fixed conductor and an outer peripheral portion fixed to one end of the holding portion, the holding portion is reliably supported by the fixed conductor via the fixed side plate. Also, scattering of the arc particles to the fixed conductor side is reliably prevented by the fixed side plate.
【００３４】また、請求項４に係る開閉装置によれば、
可動側プレートは、可動導体が貫通した貫通孔を有する
とともに外周部が保持部の他端部に固定されているの
で、可動導体側へのアークの粒子の飛散は可動側プレー
トで確実に防止される。According to the opening and closing device according to the fourth aspect,
Since the movable side plate has a through hole through which the movable conductor penetrates and the outer peripheral portion is fixed to the other end of the holding portion, scattering of arc particles to the movable conductor side is reliably prevented by the movable side plate. You.
【００３５】また、請求項５に係る開閉装置によれば、
ベローズは、一端部が可動側プレートの貫通孔の周縁部
に固定され、他端部が可動導体の周面に固定されている
ので、貫通孔からアークの粒子が外部に飛散することを
確実に防止できる。According to the opening and closing device according to the fifth aspect,
One end of the bellows is fixed to the peripheral edge of the through hole of the movable plate, and the other end is fixed to the peripheral surface of the movable conductor, so that arc particles are scattered from the through hole to the outside. Can be prevented.
【００３６】また、請求項６に係る開閉装置によれば、
シールド体は、絶縁性の保持部を介して真空容器で支持
されているので、シールド体は周囲と絶縁状態で確実に
真空容器で保持される。According to the opening and closing device according to claim 6,
Since the shield body is supported by the vacuum container via the insulating holding part, the shield body is securely held by the vacuum container in an insulated state from the surroundings.
【００３７】また、請求項７に係る開閉装置によれば、
シールド体は、固定導体を真空容器に保持した絶縁端子
筒で支持されているので、シールド体は周囲と絶縁状態
で確実に絶縁端子筒で保持される。また、シールド体は
絶縁端子筒に直接固定されており、シールド体を保持す
るための専用の部材が不要である。Further, according to the opening and closing device according to claim 7,
Since the shield is supported by the insulated terminal tube holding the fixed conductor in the vacuum vessel, the shield is reliably held by the insulated terminal tube in a state of being insulated from the surroundings. Further, the shield body is directly fixed to the insulated terminal tube, and a dedicated member for holding the shield body is not required.
【００３８】また、請求項８に係る開閉装置によれば、
シールド体の可動導体側の端部に取り付けられ可動導体
が貫通した貫通孔を有するベローズ取り付け板と、この
ベローズ取り付け板の前記貫通孔の周縁部に一端部が固
定され他端部が可動導体の周面に固定されたベローズと
を備えたので、ベローズ取り付け板の貫通孔からアーク
の粒子が外部に飛散することを確実に防止できる。According to the opening and closing device according to claim 8,
A bellows mounting plate having a through-hole attached to an end of the shield body on the movable conductor side and having a through-hole through which the movable conductor penetrates; one end of which is fixed to a peripheral portion of the through-hole of the bellows mounting plate, and With the bellows fixed to the peripheral surface, it is possible to reliably prevent the arc particles from being scattered to the outside from the through holes of the bellows mounting plate.
【００３９】また、請求項９に係る開閉装置によれば、
真空容器内において、可動電極及び固定電極のうち、地
絡する虞れがある領域側に位置した一方の電極の直径が
他方の電極よりも大きくなっているので、地絡する虞れ
がある領域側にアークの粒子が飛散する量を低減させる
ことができ、主回路開閉部の地絡の発生を防止すること
ができる。According to the opening and closing device according to the ninth aspect,
In the vacuum vessel, one of the movable electrode and the fixed electrode, which is located on the side of the area where there is a risk of ground fault, has a larger diameter than the other electrode, so that there is a risk of ground fault. The amount of arc particles scattered to the side can be reduced, and the occurrence of a ground fault at the main circuit opening / closing portion can be prevented.
【００４０】また、請求項１０に係る開閉装置によれ
ば、シールド体は金属製であるので、開極状態で固定電
極、可動電極にかかる電界の強度を緩和することができ
る。According to the switching device of the tenth aspect, since the shield is made of metal, the strength of the electric field applied to the fixed electrode and the movable electrode in the open state can be reduced.
【図１】 この発明の実施の形態１による遮断器の側断
面図である。FIG. 1 is a side sectional view of a circuit breaker according to Embodiment 1 of the present invention.
【図２】 この発明の実施の形態２による遮断器の側断
面図である。FIG. 2 is a side sectional view of a circuit breaker according to Embodiment 2 of the present invention.
【図３】 この発明の実施の形態３による遮断器の正断
面図である。FIG. 3 is a front sectional view of a circuit breaker according to Embodiment 3 of the present invention.
【図４】 図３の遮断器の側断面図である。FIG. 4 is a side sectional view of the circuit breaker of FIG. 3;
【図５】 この発明の実施の形態４による遮断器の側断
面図である。FIG. 5 is a side sectional view of a circuit breaker according to Embodiment 4 of the present invention.
【図６】 この発明の実施の形態５による遮断器の側断
面図である。FIG. 6 is a side sectional view of a circuit breaker according to Embodiment 5 of the present invention.
【図７】 この発明の実施の形態６による遮断器の要部
断面図である。FIG. 7 is a sectional view of a main part of a circuit breaker according to Embodiment 6 of the present invention.
【図８】 図７の電極からアークが吹き出したときの状
態を示す図である。FIG. 8 is a diagram showing a state when an arc is blown out of the electrode of FIG. 7;
【図９】 従来の遮断器の断面図である。FIG. 9 is a sectional view of a conventional circuit breaker.
２ 第１の固定導体、３ 固定電極、４ 可動導体、５
可動電極、７ 接地ロッド、２０ 真空容器、２２
第２の固定導体、２５ 第１の絶縁端子筒、３０，４
３、 保持部、３１，４４，４５，４６ シールド体、
３２ 固定側プレート、３３ 可動側プレート、３５
ベローズ、３６ ベローズ取り付け板、４２，４７ 貫
通孔、４８ 固定電極、４９ 可動電極。2 first fixed conductor, 3 fixed electrode, 4 movable conductor, 5
Movable electrode, 7 ground rod, 20 vacuum vessel, 22
Second fixed conductor, 25 First insulated terminal tube, 30, 4
3, holding part, 31, 44, 45, 46 shield body,
32 fixed side plate, 33 movable side plate, 35
Bellows, 36 Bellows mounting plate, 42, 47 through hole, 48 fixed electrode, 49 movable electrode.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 伊藤 武文 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 河又 巌 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 関谷 卓 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 久森 洋一 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 宮本 聖一 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 糸谷 孝行 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 寄田 光政 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 丸山 稔正 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takefumi Ito 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Co., Ltd. (72) Inventor Iwao Iwao 2-3-2 Marunouchi, Chiyoda-ku, Tokyo (72) Inventor: Taku Sekiya 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Yoichi Hisamori 2-3-2, Marunouchi, Chiyoda-ku, Tokyo Rishi Electric Co., Ltd. (72) Inventor Seiichi Miyamoto 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanbishi Electric Co., Ltd. (72) Inventor Takayuki Itoya 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Electric Corporation (72) Inventor Mitsumasa Yorita 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Chome No. 2 No. 3 Mitsubishi Electric in the Corporation of the
Claims (10)
極から可動電極が開離したときに生じたアークを構成す
る粒子が周囲に飛散するのを防止したシールド体とを備
えた開閉装置。1. A vacuum vessel, a fixed conductor whose front end faces inside the vacuum vessel, a fixed electrode fixed to the front end of the fixed conductor, a movable electrode which can be brought into contact with and separated from the fixed electrode, A movable conductor having the movable electrode fixed to the distal end portion, and particles forming an arc generated when the movable electrode is separated from the fixed electrode provided around the movable conductor and the fixed electrode are scattered around. A switchgear provided with a shield body that prevents the occurrence of a shock.
状で絶縁性の保持部の内側に設けられた請求項１に記載
の開閉装置。2. The switchgear according to claim 1, wherein the shield is provided inside a cylindrical insulating holding portion supported by the fixed conductor.
保持部の一端部に固定された固定側プレートを備えた請
求項２に記載の開閉装置。3. The switchgear according to claim 2, further comprising a fixed plate fixed at a center portion to the fixed conductor and fixed at an outer peripheral portion to one end of the holding portion.
もに外周部が保持部の他端部に固定された可動側プレー
トを備えた請求項３に記載の開閉装置。4. The switchgear according to claim 3, further comprising a movable plate having a through hole through which the movable conductor penetrates, and a movable side plate having an outer peripheral portion fixed to the other end of the holding portion.
部に固定され、他端部が可動導体の周面に固定されたベ
ローズを備えた請求項４に記載の開閉装置。5. The opening / closing device according to claim 4, further comprising a bellows having one end fixed to the peripheral edge of the through hole of the movable plate and the other end fixed to the peripheral surface of the movable conductor.
真空容器で支持された請求項１に記載の開閉装置。6. The switchgear according to claim 1, wherein the shield body is supported by a vacuum vessel via an insulating holding part.
持した絶縁端子筒で支持された請求項１に記載の開閉装
置。7. The switchgear according to claim 1, wherein the shield body is supported by an insulating terminal tube holding the fixed conductor in a vacuum vessel.
けられ、可動導体が貫通した貫通孔を有するベローズ取
り付け板と、このベローズ取り付け板の前記貫通孔の周
縁部に一端部が固定され、他端部が可動導体の周面に固
定されたベローズとを備えた請求項７に記載の開閉装
置。8. A bellows mounting plate which is attached to an end of the shield body on the movable conductor side and has a through hole through which the movable conductor penetrates, one end of which is fixed to a peripheral portion of the through hole of the bellows mounting plate. The switchgear according to claim 7, further comprising a bellows having the other end fixed to a peripheral surface of the movable conductor.
電極のうち、地絡する虞れが大きい領域側に位置した一
方の電極の直径を他方の電極と比べて大きくした請求項
１ないし請求項８の何れかに記載の開閉装置。9. A method according to claim 1, wherein one of the movable electrode and the fixed electrode, which is located on the side of a region where there is a high risk of ground fault, has a larger diameter than the other electrode. 9. The switchgear according to any one of 8 above.
いし請求項９の何れかに記載の開閉装置。10. The switchgear according to claim 1, wherein the shield is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8179098A JPH11283473A (en) | 1998-03-27 | 1998-03-27 | Switch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8179098A JPH11283473A (en) | 1998-03-27 | 1998-03-27 | Switch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11283473A true JPH11283473A (en) | 1999-10-15 |
Family
ID=13756294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8179098A Pending JPH11283473A (en) | 1998-03-27 | 1998-03-27 | Switch device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11283473A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101041379B1 (en) | 2003-05-19 | 2011-06-14 | 가부시끼가이샤 히다치 세이사꾸쇼 | Vacuum switch gear |
-
1998
- 1998-03-27 JP JP8179098A patent/JPH11283473A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101041379B1 (en) | 2003-05-19 | 2011-06-14 | 가부시끼가이샤 히다치 세이사꾸쇼 | Vacuum switch gear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6506992B2 (en) | Vacuum interrupter for vacuum breaker | |
| JP2009508294A (en) | Vacuum valve | |
| WO2010052992A1 (en) | Electrode structure for vacuum circuit breaker | |
| EP0088442B1 (en) | Puffer type gas-blast circuit breaker | |
| JPH11283473A (en) | Switch device | |
| KR880002576B1 (en) | Vaccum breaker | |
| KR100331197B1 (en) | Rotating Arc Interrupter for Loadbreak Switch | |
| US4798921A (en) | Vacuum circuit breaker | |
| US4937406A (en) | Insulator-type gas circuit interrupter | |
| JP2523474B2 (en) | Gas circuit breaker | |
| CN214012847U (en) | Terminal mounting structure of direct current contactor | |
| JP2002133980A (en) | Disconnector | |
| CN218160156U (en) | Shielding device and vacuum arc-extinguishing chamber | |
| JPH0775131B2 (en) | High voltage metal cladding switch | |
| JP3724977B2 (en) | Gas circuit breaker | |
| JPS61171021A (en) | Gas blowoff breaker | |
| JPH09134651A (en) | Puffer type gas-blast circuit-breaker | |
| JPS6210916Y2 (en) | ||
| JPS60212923A (en) | Gas breaker | |
| JP2003303534A (en) | Vacuum valve | |
| CN117766331A (en) | Shielding device and vacuum arc extinguishing chamber | |
| JPH0361296B2 (en) | ||
| JPH05344616A (en) | Gas insulated switchgear | |
| JPH10321092A (en) | Bias electrode for vacuum valve and vacuum valve using the bias electrode and vacuum circuit breaker using the vacuum valve | |
| JPH10144187A (en) | Rotary arc type gas-blast load-break switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Effective date: 20051017 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20051025 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A02 | Decision of refusal |
Effective date: 20060228 Free format text: JAPANESE INTERMEDIATE CODE: A02 |