JPH09147700A - Vacuum circuit-breaker - Google Patents

Vacuum circuit-breaker

Info

Publication number
JPH09147700A
JPH09147700A JP30243195A JP30243195A JPH09147700A JP H09147700 A JPH09147700 A JP H09147700A JP 30243195 A JP30243195 A JP 30243195A JP 30243195 A JP30243195 A JP 30243195A JP H09147700 A JPH09147700 A JP H09147700A
Authority
JP
Japan
Prior art keywords
insulating
insulating cover
rod
contact spring
cover
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
Application number
JP30243195A
Other languages
Japanese (ja)
Inventor
Masamitsu Kitsunai
正光 橘内
Osamu Akita
治 秋田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP30243195A priority Critical patent/JPH09147700A/en
Publication of JPH09147700A publication Critical patent/JPH09147700A/en
Pending legal-status Critical Current

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
    • H01H2033/6667—Details concerning lever type driving rod arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • 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

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

PROBLEM TO BE SOLVED: To eliminate the necessity of increasing the axial length of an insulating rod even in the case where the insulating degree of a device is raised by providing an insulating cover for covering a contact spring, which always pushes the insulating rod to a movable shaft side, in the contact spring. SOLUTION: An insulating cover 24 for covering a contact spring 11 is formed into a bell-shape and an opening thereof is arranged in a lower side. A bottom part of the cover 24 is arranged over an insulating rod 10, and while screwed to a rod 9 by a nut 25 through a washer 27 and a spring washer 26 passing through the metal rod 9. At the time of dielectric breakdown of the rod 10, a flash-over path is formed into a long detour around the edge of the opening part of the cover 24 like a discharging passage B by providing the cover 24. Consequently, the discharging passage B is formed long, and the insulating proof stress is improved. Namely, even in the case where the insulating degree of a device is raised, axial length of the cover 24 is increased, but the increase of the axial length of the rod 10 is unnecessary, and the increase of the height of the whole of the device is unnecessary.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は、開閉部を内部に
収納した真空バルブと、この真空バルブを開閉操作する
操作部とにより構成された真空遮断器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum circuit breaker composed of a vacuum valve having an opening / closing portion housed therein and an operating portion for opening / closing the vacuum valve.

【０００２】[0002]

【従来の技術】図６は、従来の真空遮断器の構成を示す
側面図であり、側面のパネルを除外して内部を見た図で
ある。遮断器側のフレーム３と操作部側のフレーム２と
が台車１に載置されている。フレーム３内には、真空バ
ルブ５が収納され、一方、フレーム２内には、操作部４
が収納されている。ただし、操作部４は、点線枠だけで
示され詳細な構成の図示は省略されている。真空バルブ
５は、真空容器内部に開閉部を収納したものよりなり、
真空容器内に固定接触子と可動接触子とが互いに開閉可
能に対向配置されて開閉部を形成している。固定接触子
および可動接触子は、それぞれ真空容器内で固定軸８Ａ
および可動軸８Ｂの一方端に接合され、この固定軸８Ａ
および可動軸８Ｂの他方端がそれぞれ真空容器の両端か
ら固定的または可動的に外部へ引き出されている。真空
容器の外部では、固定軸８Ａが主回路端子６Ａに直接接
続され、一方、可動軸８Ｂがフレキシブル導体７を介し
て主回路端子６Ｂに接続されている。また、可動軸８Ｂ
の下端は、リンク機構を介して操作部４に連結されてい
る。すなわち、リンク機構は、可動軸８Ｂから、金属ロ
ッド９、絶縁ロッド１０、接触スプリング１１、クラン
ク１２、変換レバー１４の順で連結され、操作部４から
の駆動力が真空バルブ５側に伝達される。変換レバー１
４は、固定ピン２３で回動自由に支持され、変換レバー
１４の左端がピン１５で操作部４側に連結され、変換レ
バー１４の右端がピン１３でクランク１２に連結されて
いる。2. Description of the Related Art FIG. 6 is a side view showing the structure of a conventional vacuum circuit breaker, and is a view of the inside without a side panel. A frame 3 on the circuit breaker side and a frame 2 on the operating portion side are mounted on a carriage 1. Inside the frame 3, a vacuum valve 5 is housed, while inside the frame 2, an operating section 4
Is stored. However, the operation unit 4 is shown only by a dotted frame, and the detailed configuration is omitted. The vacuum valve 5 is made up of an opening / closing part housed inside a vacuum container,
A fixed contact and a movable contact are arranged in the vacuum container so as to be capable of opening and closing with each other to form an opening / closing portion. The fixed contact and the movable contact are each fixed shaft 8A in the vacuum container.
And the fixed shaft 8A joined to one end of the movable shaft 8B.
The other end of the movable shaft 8B is fixedly or movably drawn to the outside from both ends of the vacuum container. Outside the vacuum container, the fixed shaft 8A is directly connected to the main circuit terminal 6A, while the movable shaft 8B is connected to the main circuit terminal 6B via the flexible conductor 7. In addition, the movable shaft 8B
The lower end of is connected to the operation unit 4 via a link mechanism. That is, in the link mechanism, the metal rod 9, the insulating rod 10, the contact spring 11, the crank 12, and the conversion lever 14 are connected in this order from the movable shaft 8B, and the driving force from the operation unit 4 is transmitted to the vacuum valve 5 side. It Conversion lever 1
4 is rotatably supported by a fixed pin 23, the left end of the conversion lever 14 is connected to the operation portion 4 side by a pin 15, and the right end of the conversion lever 14 is connected to the crank 12 by a pin 13.

【０００３】図６において、変換レバー１４は、操作部
４からの駆動力の方向を変えて真空バルブ５側に力を伝
達させる。フレキシブル導体７は、真空バルブ５が開閉
の度に可動軸８Ｂを上下させても、その動きが、主回路
端子６Ｂ側の伝わらないようにしている。なお、真空バ
ルブ５は、図示されていない絶縁フレームを介してフレ
ーム３に固定されている。In FIG. 6, the conversion lever 14 changes the direction of the driving force from the operating portion 4 to transmit the force to the vacuum valve 5 side. The flexible conductor 7 prevents the movement thereof from being transmitted to the main circuit terminal 6B side even if the movable shaft 8B is moved up and down each time the vacuum valve 5 is opened and closed. The vacuum valve 5 is fixed to the frame 3 via an insulating frame (not shown).

【０００４】図７は、図６の要部拡大断面図である。金
属ロッド９の上部が真空バルブの可動軸に固定され、ク
ランク１２が変換レバーに連結されている。絶縁ロッド
１０には、金属ロッド９と１８との端部が対向された状
態で埋め込まれ、金属ロッド９と１８とが、互いに絶縁
されるとともに同一の軸線上に固定されている。さら
に、絶縁ロッド１０の下面側には、中心軸を周回する周
回溝１０Ａが形成されている。金属ロッド９の上部は、
ねじ加工され、上側の可動軸８Ｂ（図６）にボルト止め
される。金属ロッド１８の下部もねじ加工され、そのね
じ部１８Ａに止め板１９を貫通させるとともにワッシャ
ー２０およびスプリングワッシャー２１を嵌め込み、ナ
ット２２で止め板１９が金属ロッド１８に固定されてい
る。接触スプリング１１は、圧縮性のコイルスプリング
であり、内部に金属ロッド１８が通るように配されてい
る。接触スプリング１１の軸方向の上下には、盆形で中
央穴の明いた金属キャップ１６，１７が嵌め込まれてい
る。上側の金属キャップ１６の中央穴には、絶縁ロッド
１６の突出部１０Ｂに嵌め込まれ、下側の金属キャップ
１７の中央穴には金属ロッド１８が貫通している。さら
に、下側の金属キャップ１７と止め板１９との間には、
クランク１２のつば部１２Ｂが介装されている。一方、
クランク１２には、ピン穴１２Ａと止め穴１２Ｃとが貫
通し、ピン穴１２Ａには、変換レバ−１４に連結させる
ためのピン１３（図６）が通される。止め穴１２Ｃの上
部は開口しており、止め穴１２Ｃ内部に止め板１９を納
めるとともに止め板１９が止め穴１２Ｃから上方へ抜け
ないようになっている。FIG. 7 is an enlarged cross-sectional view of the main part of FIG. The upper part of the metal rod 9 is fixed to the movable shaft of the vacuum valve, and the crank 12 is connected to the conversion lever. The end portions of the metal rods 9 and 18 are embedded in the insulating rod 10 so as to face each other, and the metal rods 9 and 18 are insulated from each other and fixed on the same axis. Furthermore, on the lower surface side of the insulating rod 10, a circular groove 10A that circulates around the central axis is formed. The upper part of the metal rod 9
It is threaded and bolted to the upper movable shaft 8B (FIG. 6). The lower portion of the metal rod 18 is also threaded, the stopper plate 19 is penetrated through the threaded portion 18A, the washer 20 and the spring washer 21 are fitted, and the stopper plate 19 is fixed to the metal rod 18 by the nut 22. The contact spring 11 is a compressible coil spring, and is arranged so that the metal rod 18 passes through the inside thereof. Metal caps 16 and 17 each having a tray shape and a central hole are fitted on the upper and lower sides of the contact spring 11 in the axial direction. A metal rod 18 is inserted through the central hole of the upper metal cap 16 into the protruding portion 10B of the insulating rod 16 and a central hole of the lower metal cap 17 penetrates. Furthermore, between the lower metal cap 17 and the stop plate 19,
The flange portion 12B of the crank 12 is interposed. on the other hand,
A pin hole 12A and a stop hole 12C pass through the crank 12, and a pin 13 (FIG. 6) for connecting to the conversion lever 14 is passed through the pin hole 12A. The upper part of the stop hole 12C is open, and the stop plate 19 is housed inside the stop hole 12C and the stop plate 19 does not come out upward from the stop hole 12C.

【０００５】図７において、真空バルブの開閉部が閉極
状態のとき、変換レバ−によってクランク１２を下方へ
駆動させると、クランク１２のつば部１２Ｂが止め板１
９を下方へ押圧するので、その駆動力が、金属ロッド１
８、絶縁ロッド１０、金属ロッド９を介して上部の可動
軸へ伝達される。それによって、真空バルブの開閉部が
開極する。次に、真空バルブの開閉部が開極状態のと
き、変換レバ−によってクランク１２を上方へ駆動させ
ると、その駆動力が、接触スプリング１１、絶縁ロッド
１０、金属ロッド９を介して上部の可動軸へ伝達され
る。それによって、真空バルブの開閉部が閉極する。こ
の真空バルブの開閉部が閉極状態において、接触スプリ
ング１１が絶縁ロッド１０を常時押圧している。そのた
めに、真空バルブ内部の固定接点と可動接点との接触状
態が良好になり、接点間の接触抵抗を常時極小に保って
いる。なお、金属キャップ１６，１７は、接触スプリン
グ１１がずれないようにするためのものであり、絶縁ロ
ッド１０の周回溝１０Ａは、絶縁ロッド１０表面の沿面
距離を長くするためのものである。すなわち、金属ロッ
ド９には、真空バルブの主回路にかかる高電圧が印加さ
れている。一方、金属ロッド１８は、接地電位にあるの
で、金属ロッド９と１８との間にも高電圧がかかる。絶
縁ロッド１０表面の沿面距離を長くすることによって、
絶縁ロッド１０が例え汚損されても、絶縁ロッド１０が
表面閃絡することがなくなる。In FIG. 7, when the crank lever 12 is driven downward by the conversion lever when the opening / closing portion of the vacuum valve is in the closed state, the flange portion 12B of the crank 12 causes the stop plate 1 to move.
Since 9 is pushed downward, its driving force is the metal rod 1
It is transmitted to the upper movable shaft via 8, the insulating rod 10 and the metal rod 9. As a result, the opening / closing part of the vacuum valve is opened. Next, when the open / close part of the vacuum valve is in the open state, the crank 12 is driven upward by the conversion lever, and the driving force of the crank 12 moves the upper part via the contact spring 11, the insulating rod 10, and the metal rod 9. Transmitted to the shaft. As a result, the opening / closing part of the vacuum valve is closed. When the opening / closing portion of the vacuum valve is in the closed state, the contact spring 11 constantly presses the insulating rod 10. Therefore, the contact state between the fixed contact and the movable contact inside the vacuum valve is improved, and the contact resistance between the contacts is always kept to a minimum. The metal caps 16 and 17 are provided to prevent the contact spring 11 from being displaced, and the circumferential groove 10A of the insulating rod 10 is provided to increase the creeping distance on the surface of the insulating rod 10. That is, a high voltage applied to the main circuit of the vacuum valve is applied to the metal rod 9. On the other hand, since the metal rod 18 is at the ground potential, a high voltage is also applied between the metal rods 9 and 18. By increasing the creepage distance on the surface of the insulating rod 10,
Even if the insulating rod 10 is contaminated, the surface of the insulating rod 10 will not be flashed.

【０００６】[0006]

【発明が解決しようとする課題】しかしながら、前述し
たような従来の装置は、絶縁階級が高くなると絶縁ロッ
ドの軸方向長さを増す必要が生じ、装置全体が高くなる
という問題があった。前述のように絶縁ロッドに主回路
の対地電圧がかかるために絶縁ロッドの軸方向長さは、
絶縁階級の高さに応じて変えなければならなかった。す
なわち、図７において、絶縁ロッド１０が絶縁破壊した
ときの閃絡経路は、放電路Ａ（点線）のように絶縁ロッ
ド１０の外周面にほぼ沿うようになる。この放電路Ａが
長くなる程、絶縁耐力が高くなる。そのために、装置の
絶縁階級が高くなる程、その絶縁ロッド１０の軸方向長
を増していた。However, the conventional device as described above has a problem that the axial length of the insulating rod needs to be increased as the insulation class increases, and the overall device becomes high. As mentioned above, the axial length of the insulating rod is
Had to change according to the height of the insulation class. That is, in FIG. 7, the flashover path when the insulating rod 10 is dielectrically broken is substantially along the outer peripheral surface of the insulating rod 10 like the discharge path A (dotted line). The longer the discharge path A, the higher the dielectric strength. Therefore, as the insulation class of the device is increased, the axial length of the insulation rod 10 is increased.

【０００７】この発明の目的は、装置の絶縁階級が高く
なっても絶縁ロッドの軸方向長を増さなくてもよいよう
にすることにある。An object of the present invention is to prevent the axial length of the insulating rod from being increased even if the insulating class of the device is increased.

【０００８】[0008]

【課題を解決するための手段】上記目的を達成するため
に、この発明によれば、真空容器内に固定接触子と可動
接触子とが互いに開閉可能に対向配置されて開閉部が形
成され、前記固定接触子および可動接触子がそれぞれ真
空容器内で固定軸および可動軸の一方端に接合され、こ
の固定軸および可動軸の他方端がそれぞれ前記真空容器
の両端から固定的または可動的に外部へ引き出されると
ともに、真空容器の外部へ引き出された可動軸の他方端
にリンク機構を介して前記開閉部に開閉操作力を与える
操作部が連結され、前記リンク機構は可動軸の他方端側
に連結された絶縁ロッドと、この絶縁ロッドの反可動軸
側に圧縮性の接触スプリングを介して連結され力の伝達
方向を変える変換レバーとにより構成され、前記接触ス
プリングは絶縁ロッドを可動軸側に常時押圧してなる真
空遮断器において、前記接触スプリングを覆う絶縁カバ
ーが設けられたものとするとよい。絶縁カバーによっ
て、絶縁ロッドの閃絡に於ける放電路が長くなるので、
絶縁ロッドの絶縁耐力が高くなる。そのために、装置の
絶縁階級が高くなっても絶縁ロッドの軸方向長を増す必
要がなくなる。To achieve the above object, according to the present invention, a fixed contact and a movable contact are arranged in a vacuum container so as to be openable and closable to form an opening / closing portion. The fixed contact and the movable contact are respectively joined to one ends of a fixed shaft and a movable shaft in the vacuum container, and the other ends of the fixed shaft and the movable shaft are fixedly or movably externally provided from both ends of the vacuum container. To the other end of the movable shaft, which is pulled out to the outside of the vacuum vessel, is connected to the other end of the movable shaft through a link mechanism, which provides an opening / closing operation force to the opening / closing part. It is composed of a connected insulating rod and a conversion lever connected to the opposite movable shaft side of the insulating rod via a compressible contact spring to change the direction of force transmission. In the vacuum circuit breaker made by pressing constantly de the movable shaft side, it may assume the insulating cover for covering the contact spring is provided. Since the insulating cover lengthens the discharge path in the flash of the insulating rod,
The dielectric strength of the insulating rod is increased. Therefore, it is not necessary to increase the axial length of the insulating rod even if the insulating class of the device is increased.

【０００９】また、かかる構成において、絶縁カバーが
釣鐘形に形成され、この絶縁カバーの開口側が変換レバ
ー側に向けて配されるとともに、絶縁カバーの底部が絶
縁ロッドの可動軸側に取り付けられ、絶縁カバーの内部
に絶縁ロッドと接触スプリングとが納められてなるもの
としてもよい。また、かかる構成において、絶縁カバー
が釣鐘形に形成され、この絶縁カバーの開口側が可動軸
側に向けて配されるとともに、絶縁カバーの底部が接触
スプリングの変換レバー側に取り付けられ、絶縁カバー
の開口部縁端が絶縁ロッドの接触スプリング側に形成さ
れた周回溝の内部に嵌挿され、絶縁カバーの内部に接触
スプリングが納められてなるものとしてもよい。Further, in such a structure, the insulating cover is formed in a bell shape, the opening side of the insulating cover is arranged toward the conversion lever side, and the bottom portion of the insulating cover is attached to the movable shaft side of the insulating rod. The insulating rod and the contact spring may be housed inside the insulating cover. In addition, in such a configuration, the insulating cover is formed in a bell shape, the opening side of the insulating cover is arranged toward the movable shaft side, and the bottom portion of the insulating cover is attached to the conversion lever side of the contact spring. The edge of the opening may be fitted and inserted in the circumferential groove formed on the contact spring side of the insulating rod, and the contact spring may be housed inside the insulating cover.

【００１０】また、かかる構成において、絶縁カバーが
釣鐘形に形成され、この絶縁カバーの開口側が変換レバ
ー側に向けて配されるとともに、絶縁カバーの底部が絶
縁ロッドの変換レバー側に取り付けられ、絶縁カバーの
内部に接触スプリングが納められてなるものとしてもよ
い。また、かかる構成において、絶縁カバーの可動軸側
にリング状の突起が形成され、この突起が絶縁ロッドの
接触スプリング側に形成された周回溝の内部に嵌挿され
てなるものとしてもよい。Further, in such a structure, the insulating cover is formed in a bell shape, the opening side of the insulating cover is arranged toward the conversion lever side, and the bottom of the insulating cover is attached to the conversion lever side of the insulating rod. A contact spring may be housed inside the insulating cover. Further, in such a configuration, a ring-shaped protrusion may be formed on the movable shaft side of the insulating cover, and the protrusion may be fitted and inserted into the circumferential groove formed on the contact spring side of the insulating rod.

【００１１】[0011]

【発明の実施の形態】以下、この発明を実施例に基づい
て説明する。図１は、この発明の実施例にかかる真空遮
断器の構成を示す側面図である。また、図２は、図１の
要部拡大断面図である。図２において、接触スプリング
１１を覆う絶縁カバー２４が設けられている。絶縁カバ
ー２４は、釣鐘形に形成され、この絶縁カバー２４の開
口側が、下側（変換レバー側）に向けて配されている。
絶縁カバー２４の底部は、絶縁ロッド１０の上側（可動
軸側）に配されるとともに、金属ロッド９を貫通するワ
ッシャー２７およびスプリングワッシャー２６を介して
ナット２５で金属ロッド９にねじ止めされている。絶縁
カバー２４の内部に絶縁ロッド１０と接触スプリング１
１とが納められている。その他の構成は、図６、図７の
従来の構成と同じである。従来と同じ部分には同一参照
符号を付け、詳細な説明をここで繰り返すことは省略す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. FIG. 1 is a side view showing the structure of a vacuum circuit breaker according to an embodiment of the present invention. Further, FIG. 2 is an enlarged cross-sectional view of a main part of FIG. In FIG. 2, an insulating cover 24 that covers the contact spring 11 is provided. The insulating cover 24 is formed in a bell shape, and the opening side of the insulating cover 24 is arranged toward the lower side (conversion lever side).
The bottom of the insulating cover 24 is arranged on the upper side (movable shaft side) of the insulating rod 10 and is screwed to the metal rod 9 with a nut 25 via a washer 27 and a spring washer 26 that penetrate the metal rod 9. . The insulating rod 10 and the contact spring 1 are provided inside the insulating cover 24.
1 is paid. Other configurations are the same as the conventional configurations of FIGS. 6 and 7. The same parts as those of the related art are designated by the same reference numerals, and detailed description thereof will not be repeated here.

【００１２】図２において、絶縁カバー２４が備えられ
たので、絶縁ロッド１０が絶縁破壊したときの閃絡経路
は、放電路Ｂ（点線）のように絶縁カバー２４の開口部
縁端を大回りするようになる。したがって、放電路Ｂが
従来の装置の場合より長くなり、絶縁耐力が高くなる。
それによって、装置の絶縁階級が高くなってもその絶縁
ロッド１０の軸方向長を増す必要はなくなり、絶縁カバ
ー２４の軸方向長を増すだけで済む。そのために、装置
全体も高くならない。In FIG. 2, since the insulating cover 24 is provided, the flashover path when the insulating rod 10 is dielectrically broken goes around the edge of the opening portion of the insulating cover 24 as a discharge path B (dotted line). Like Therefore, the discharge path B becomes longer than in the case of the conventional device, and the dielectric strength increases.
This eliminates the need to increase the axial length of the insulating rod 10 even if the insulating class of the device is increased, and only needs to increase the axial length of the insulating cover 24. Therefore, the entire device does not become expensive.

【００１３】図３は、この発明の異なる実施例にかかる
真空遮断器の構成を示す要部拡大断面図である。釣鐘形
の絶縁カバー２８の開口側が上側（可動軸側）に向けて
配されるとともに、絶縁カバーの底部が接触スプリング
１１の変換レバー側（金属キャップ１７とクランク１２
のつば部１２Ｂとの間）に設けられている。絶縁カバー
２８の開口部縁端は、絶縁ロッド１０に形成された周回
溝１０Ａの内部に嵌挿され、絶縁カバー２８の内部に接
触スプリング１１が納められている。その他の構成は、
図２の構成と同じである。FIG. 3 is an enlarged sectional view of a main part showing the structure of a vacuum circuit breaker according to another embodiment of the present invention. The opening side of the bell-shaped insulating cover 28 is arranged toward the upper side (movable shaft side), and the bottom portion of the insulating cover is on the conversion lever side of the contact spring 11 (the metal cap 17 and the crank 12).
Between the rib portion 12B). The edge of the opening of the insulating cover 28 is fitted into the circular groove 10 </ b> A formed in the insulating rod 10, and the contact spring 11 is housed inside the insulating cover 28. Other configurations are
The configuration is the same as in FIG.

【００１４】図３において、絶縁カバー２８が備えられ
たので、絶縁ロッド１０が絶縁破壊したときの閃絡経路
は、放電路Ｃ（点線）のように周回溝１０Ａ内の絶縁カ
バー２８の開口部縁端を折れ曲がって進むようになる。
したがって、放電路Ｃが従来の装置の場合より長くな
り、絶縁耐力が高くなる。それによって、装置の絶縁階
級が高くなってもその絶縁ロッド１０の軸方向長を増す
必要はなくなり、絶縁カバー２８の周回溝１０Ａ内への
突っ込み長を増すだけでよくなる。そのために、装置全
体も高くならない。In FIG. 3, since the insulating cover 28 is provided, the flashover path when the insulating rod 10 is dielectrically broken down is the opening portion of the insulating cover 28 in the orbiting groove 10A like the discharge path C (dotted line). You will bend at the edge and proceed.
Therefore, the discharge path C becomes longer than in the case of the conventional device, and the dielectric strength increases. This eliminates the need to increase the axial length of the insulating rod 10 even if the insulating class of the device is increased, and only needs to increase the thrusting length of the insulating cover 28 into the circumferential groove 10A. Therefore, the entire device does not become expensive.

【００１５】図４は、この発明のさらに異なる実施例に
かかる真空遮断器の構成を示す要部拡大断面図である。
釣鐘形に形成された絶縁カバー２９の開口側が、下側
（変換レバー側）に向けて配されている。絶縁カバー２
９の底部は、絶縁ロッド１０と金属キャップ１６との間
に取り付けられ、絶縁カバー２９の内部に接触スプリン
グ１１が納められている。その他の構成は、図２の構成
と同じである。FIG. 4 is an enlarged cross-sectional view of the essential parts showing the structure of the vacuum circuit breaker according to a further different embodiment of the present invention.
The opening side of the insulating cover 29 formed in a bell shape is arranged toward the lower side (conversion lever side). Insulation cover 2
The bottom portion of 9 is attached between the insulating rod 10 and the metal cap 16, and the contact spring 11 is housed inside the insulating cover 29. Other configurations are the same as those in FIG.

【００１６】図４において、絶縁カバー２９が備えられ
たので、絶縁ロッド１０が絶縁破壊したときの閃絡経路
は、放電路Ｄ（点線）のように絶縁カバー２９の底部に
沿い、絶縁ロッド１０の中心軸に向かって進むようにな
る。したがって、放電路Ｄが従来の装置の場合より長く
なり、絶縁耐力が高くなる。それによって、装置の絶縁
階級が高くなってもその絶縁ロッド１０の軸方向長を増
す必要はなくなる。そのために、装置全体も高くならな
い。In FIG. 4, since the insulating cover 29 is provided, the flashover path when the insulating rod 10 is dielectrically broken down is along the bottom portion of the insulating cover 29 as the discharge path D (dotted line), and the insulating rod 10 is provided. It will proceed toward the central axis of. Therefore, the discharge path D becomes longer than in the case of the conventional device, and the dielectric strength increases. Thereby, it is not necessary to increase the axial length of the insulating rod 10 even if the insulating class of the device is increased. Therefore, the entire device does not become expensive.

【００１７】図５は、この発明のさらに異なる実施例に
かかる真空遮断器の構成を示す要部拡大断面図である。
絶縁カバー３０の底部上側（可動軸側）にリング状の突
起３０Ａが形成され、この突起３０Ａが絶縁ロッド１０
の周回溝１０Ａの内部に嵌挿させる。その他の構成は、
図４の構成と同じである。図５において、絶縁カバー３
０が備えられたので、絶縁ロッド１０が絶縁破壊したと
きの閃絡経路は、放電路Ｅ（点線）のように絶縁カバー
２９の底部で突起３０Ａを大回りして進むようになる。
したがって、放電路Ｅが従来の装置の場合より長くな
り、絶縁耐力が高くなる。それによって、装置の絶縁階
級が高くなってもその絶縁ロッド１０の軸方向長を増す
必要はなくなり、突起３０Ａの周回溝１０Ａ内への突っ
込み長を増すだけでよくなる。そのために、装置全体も
高くならない。FIG. 5 is an enlarged cross-sectional view of the essential parts showing the structure of a vacuum circuit breaker according to a further different embodiment of the present invention.
A ring-shaped protrusion 30A is formed on the upper side (the movable shaft side) of the bottom of the insulating cover 30, and the protrusion 30A is formed on the insulating rod 10.
It is inserted into the inside of the orbiting groove 10A. Other configurations are
This is the same as the configuration in FIG. In FIG. 5, the insulating cover 3
Since 0 is provided, the flashover path at the time of insulation breakdown of the insulating rod 10 goes around the protrusion 30A at the bottom of the insulating cover 29, like the discharge path E (dotted line).
Therefore, the discharge path E becomes longer than in the case of the conventional device, and the dielectric strength increases. This eliminates the need to increase the axial length of the insulating rod 10 even if the insulation class of the device is increased, and only needs to increase the length of protrusion of the protrusion 30A into the circumferential groove 10A. Therefore, the entire device does not become expensive.

【００１８】なお、前記の実施例の他に、図２の絶縁カ
バー２４と図３の絶縁カバー２８とがともに設けられ、
互いに嵌合し合うように配してもよい。また、図２の絶
縁カバー２４の下側開口部を絶縁材で完全に覆ってよ
い。ただし、クランク１２と絶縁カバー２４との間隙長
は、接触スプリング１１によって真空バルブの開閉の度
に変化するので、絶縁カバー２４の下側開口部を覆う絶
縁材は、ゴムなどの可とう性のあるものが用いられる。In addition to the above-mentioned embodiment, the insulating cover 24 of FIG. 2 and the insulating cover 28 of FIG. 3 are both provided,
You may arrange | position so that it may mutually fit. Also, the lower opening of the insulating cover 24 in FIG. 2 may be completely covered with an insulating material. However, since the gap length between the crank 12 and the insulating cover 24 changes each time the vacuum valve is opened and closed by the contact spring 11, the insulating material covering the lower opening of the insulating cover 24 is made of a flexible material such as rubber. Some are used.

【００１９】[0019]

【発明の効果】この発明は前述のように、前記接触スプ
リングを覆う絶縁カバーが設けられることによって、絶
縁ロッドの絶縁耐力が高くなる。そのために、装置の絶
縁階級が高くなっても絶縁ロッドの軸方向長を増す必要
がなくなる。それによって、装置全体も高くならず、装
置の縮小化、低コスト化が実現する。As described above, according to the present invention, since the insulating cover for covering the contact spring is provided, the dielectric strength of the insulating rod is increased. Therefore, it is not necessary to increase the axial length of the insulating rod even if the insulating class of the device is increased. As a result, the entire device does not become expensive, and the device can be downsized and the cost can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の実施例にかかる真空遮断器の構成を
示す側面図FIG. 1 is a side view showing a configuration of a vacuum circuit breaker according to an embodiment of the present invention.

【図２】図１の要部拡大断面図FIG. 2 is an enlarged cross-sectional view of the main part of FIG.

【図３】この発明の異なる実施例にかかる真空遮断器の
構成を示す要部拡大断面図FIG. 3 is an enlarged sectional view of an essential part showing the structure of a vacuum circuit breaker according to another embodiment of the present invention.

【図４】この発明のさらに異なる実施例にかかる真空遮
断器の構成を示す要部拡大断面図FIG. 4 is an enlarged sectional view of an essential part showing the configuration of a vacuum circuit breaker according to a further different embodiment of the present invention.

【図５】この発明のさらに異なる実施例にかかる真空遮
断器の構成を示す要部拡大断面図FIG. 5 is an enlarged sectional view of an essential part showing the structure of a vacuum circuit breaker according to a still further embodiment of the present invention.

【図６】従来の真空遮断器の構成を示す側面図FIG. 6 is a side view showing the configuration of a conventional vacuum circuit breaker.

【図７】図６の要部拡大断面図7 is an enlarged cross-sectional view of the main part of FIG.

【符号の説明】[Explanation of symbols]

４：操作部、５：真空バルブ、８Ａ：固定軸、８Ｂ：可
動軸、１０：絶縁ロッド、１０Ａ：周回溝、１１：接触
スプリング、１４：変換レバー、２４，２８，２９，３
０：絶縁カバー、３０Ａ：突起4: Operation part, 5: Vacuum valve, 8A: Fixed shaft, 8B: Movable shaft, 10: Insulating rod, 10A: Orbital groove, 11: Contact spring, 14: Conversion lever, 24, 28, 29, 3
0: Insulation cover, 30A: Protrusion

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】真空容器内に固定接触子と可動接触子とが
互いに開閉可能に対向配置されて開閉部が形成され、前
記固定接触子および可動接触子がそれぞれ真空容器内で
固定軸および可動軸の一方端に接合され、この固定軸お
よび可動軸の他方端がそれぞれ前記真空容器の両端から
固定的または可動的に外部へ引き出されるとともに、真
空容器の外部へ引き出された可動軸の他方端にリンク機
構を介して前記開閉部に開閉操作力を与える操作部が連
結され、前記リンク機構は可動軸の他方端側に連結され
た絶縁ロッドと、この絶縁ロッドの反可動軸側に圧縮性
の接触スプリングを介して連結され力の伝達方向を変え
る変換レバーとにより構成され、前記接触スプリングは
絶縁ロッドを可動軸側に常時押圧してなる真空遮断器に
おいて、前記接触スプリングにこれを覆う絶縁カバーが
設けられたことを特徴とする真空遮断器。1. A fixed contact and a movable contact are arranged in a vacuum container so as to be openable and closable to form an opening / closing portion, and the fixed contact and the movable contact are respectively fixed shaft and movable in the vacuum container. The other ends of the fixed shaft and the movable shaft are joined to one end of the shaft, and the other ends of the fixed shaft and the movable shaft are fixedly or movably drawn to the outside from both ends of the vacuum container, and the other end of the movable shaft is drawn to the outside of the vacuum container. An operating portion for applying an opening / closing operation force to the opening / closing portion is connected to the opening / closing portion via a link mechanism, and the link mechanism includes an insulating rod connected to the other end side of the movable shaft, and a compressive property on the side opposite to the movable shaft of the insulating rod. In the vacuum circuit breaker, which is connected through a contact spring and changes the force transmission direction, the contact spring constantly presses the insulating rod toward the movable shaft. Vacuum circuit breaker, characterized in that the insulating cover covering the provided pulling. 【請求項２】請求項１に記載のものにおいて、絶縁カバ
ーが釣鐘形に形成され、この絶縁カバーの開口側が変換
レバー側に向けて配されるとともに、絶縁カバーの底部
が絶縁ロッドの可動軸側に取り付けられ、絶縁カバーの
内部に絶縁ロッドと接触スプリングとが納められてなる
ことを特徴とする真空遮断器。2. The insulating cover according to claim 1, wherein the insulating cover is formed in a bell shape, the opening side of the insulating cover is arranged toward the conversion lever side, and the bottom of the insulating cover is a movable shaft of the insulating rod. A vacuum circuit breaker, which is mounted on the side, and in which an insulating rod and a contact spring are housed inside an insulating cover. 【請求項３】請求項１に記載のものにおいて、絶縁カバ
ーが釣鐘形に形成され、この絶縁カバーの開口側が可動
軸側に向けて配されるとともに、絶縁カバーの底部が接
触スプリングの変換レバー側に取り付けられ、絶縁カバ
ーの開口部縁端が絶縁ロッドの接触スプリング側に形成
された周回溝の内部に嵌挿され、絶縁カバーの内部に接
触スプリングが納められてなることを特徴とする真空遮
断器。3. The conversion lever of claim 1, wherein the insulating cover is formed in a bell shape, the opening side of the insulating cover is arranged toward the movable shaft side, and the bottom of the insulating cover is a contact spring. The vacuum is characterized in that the opening edge of the insulating cover is fitted into the circular groove formed on the contact spring side of the insulating rod, and the contact spring is housed inside the insulating cover. Circuit breaker. 【請求項４】請求項１に記載のものにおいて、絶縁カバ
ーが釣鐘形に形成され、この絶縁カバーの開口側が変換
レバー側に向けて配されるとともに、絶縁カバーの底部
が絶縁ロッドの変換レバー側に取り付けられ、絶縁カバ
ーの内部に接触スプリングが納められてなることを特徴
とする真空遮断器。4. The conversion lever according to claim 1, wherein the insulating cover is formed in a bell shape, the opening side of the insulating cover is arranged toward the conversion lever side, and the bottom portion of the insulating cover is an insulation rod. A vacuum circuit breaker that is mounted on the side and has a contact spring housed inside an insulating cover. 【請求項５】請求項４に記載のものにおいて、絶縁カバ
ーの可動軸側にリング状の突起が形成され、この突起が
絶縁ロッドの接触スプリング側に形成された周回溝の内
部に嵌挿されてなることを特徴とする真空遮断器。5. The ring cover according to claim 4, wherein a ring-shaped protrusion is formed on the movable shaft side of the insulating cover, and the protrusion is fitted and inserted into a circular groove formed on the contact spring side of the insulating rod. A vacuum circuit breaker characterized by the following.
JP30243195A 1995-11-21 1995-11-21 Vacuum circuit-breaker Pending JPH09147700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30243195A JPH09147700A (en) 1995-11-21 1995-11-21 Vacuum circuit-breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30243195A JPH09147700A (en) 1995-11-21 1995-11-21 Vacuum circuit-breaker

Publications (1)

Publication Number Publication Date
JPH09147700A true JPH09147700A (en) 1997-06-06

Family

ID=17908849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30243195A Pending JPH09147700A (en) 1995-11-21 1995-11-21 Vacuum circuit-breaker

Country Status (1)

Country Link
JP (1) JPH09147700A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2850204A1 (en) * 2003-01-17 2004-07-23 Mitsubishi Electric Corp Sealed-unit switching device useful in circuit breakers comprises a spring mounted on the end of the moving shaft connected to the moving contact of a switch in a tank of insulating gas
JP2007188798A (en) * 2006-01-14 2007-07-26 Nippon Kouatsu Electric Co Operating rod cover
JP2011204591A (en) * 2010-03-26 2011-10-13 Mitsubishi Electric Corp Switching device
WO2018197196A1 (en) * 2017-04-26 2018-11-01 Siemens Aktiengesellschaft Vacuum switch
RU196566U1 (en) * 2019-11-05 2020-03-05 Общество с ограниченной ответственностью "Астер Электро" VACUUM SWITCH INSULATION CAP

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2850204A1 (en) * 2003-01-17 2004-07-23 Mitsubishi Electric Corp Sealed-unit switching device useful in circuit breakers comprises a spring mounted on the end of the moving shaft connected to the moving contact of a switch in a tank of insulating gas
US6927356B2 (en) 2003-01-17 2005-08-09 Mitsubishi Denki Kabushiki Kaisha Enclosed switchgear
JP2007188798A (en) * 2006-01-14 2007-07-26 Nippon Kouatsu Electric Co Operating rod cover
JP4669398B2 (en) * 2006-01-14 2011-04-13 日本高圧電気株式会社 Operating rod cover
JP2011204591A (en) * 2010-03-26 2011-10-13 Mitsubishi Electric Corp Switching device
WO2018197196A1 (en) * 2017-04-26 2018-11-01 Siemens Aktiengesellschaft Vacuum switch
RU196566U1 (en) * 2019-11-05 2020-03-05 Общество с ограниченной ответственностью "Астер Электро" VACUUM SWITCH INSULATION CAP

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