JPH07335095A - Vacuum circuit breaker - Google Patents
Vacuum circuit breakerInfo
- Publication number
- JPH07335095A JPH07335095A JP12335494A JP12335494A JPH07335095A JP H07335095 A JPH07335095 A JP H07335095A JP 12335494 A JP12335494 A JP 12335494A JP 12335494 A JP12335494 A JP 12335494A JP H07335095 A JPH07335095 A JP H07335095A
- Authority
- JP
- Japan
- Prior art keywords
- circuit breaker
- vacuum
- rod
- dashpot
- movable shaft
- 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
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は真空遮断器に関する。FIELD OF THE INVENTION This invention relates to vacuum circuit breakers.
【０００２】[0002]
【従来の技術】周知のように、真空遮断器は真空の優れ
た絶縁耐力を利用したものであり、真空バルブの真空度
が電気的性能に大きく左右する。このため、真空バルブ
の真空度判定を適宜行っていく必要がある。2. Description of the Related Art As is well known, a vacuum circuit breaker utilizes the excellent dielectric strength of a vacuum, and the degree of vacuum of a vacuum valve greatly influences its electrical performance. Therefore, it is necessary to appropriately determine the degree of vacuum of the vacuum valve.
【０００３】ところで、真空中の放電現象は圧力により
特異な様相を呈する。すなわち、図４に示すパッシェン
の法則で知られているように、放電電圧Ｖs は圧力ｐ×
間隙長ｄの関数としてＶ字形を示す。正常の真空バルブ
はｐ×ｄに対して放電電圧Ｖs が一定値となる“Ａ”領
域の特性を示す。気密に欠陥があるような不良な真空バ
ルブは、圧力が上がるにつれてパッシェン曲線に沿って
耐圧が低下することになる。By the way, the discharge phenomenon in a vacuum has a peculiar aspect due to the pressure. That is, as known from Paschen's law shown in FIG. 4, the discharge voltage Vs is the pressure p ×
The V-shape is shown as a function of the gap length d. A normal vacuum valve exhibits characteristics in the "A" region where the discharge voltage Vs is a constant value with respect to pxd. A defective vacuum valve having a defect in airtightness has a reduced withstand pressure along the Paschen curve as the pressure increases.
【０００４】従来の真空度判定においては、このような
真空中の放電現象を利用し、例えば特公昭５６−３９０
０７に示されているように、真空バルブの極間に真空不
良時に放電する値の電圧を印加して行っていた。In the conventional determination of the degree of vacuum, such a discharge phenomenon in a vacuum is utilized, and for example, Japanese Patent Publication No. 56-390.
As shown in No. 07, a voltage of a value that causes a discharge when a vacuum defect occurs is applied between the electrodes of the vacuum valve.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
真空遮断器では、真空バルブの接点ギャップが大きくな
るにつれ印加電圧も大きくする必要があり、大容量設備
が必要となった。本発明の目的は、真空バルブの接点ギ
ャップの調整を行い、小容量設備で真空度判定を行える
真空遮断器を提供することにある。However, in the conventional vacuum circuit breaker, it is necessary to increase the applied voltage as the contact gap of the vacuum valve is increased, and a large capacity facility is required. An object of the present invention is to provide a vacuum circuit breaker capable of adjusting a contact gap of a vacuum valve and determining a degree of vacuum with a small capacity facility.
【０００６】[0006]
【課題を解決するための手段および作用】上記目的を達
成するために本発明は、真空容器内に接離自在の固定電
極と可動電極が配設され、一端が前記可動電極に固着す
る可動軸が前記真空容器外に気密に導出した真空バルブ
を備える遮断部の可動軸の操作を調整する調整手段を設
けたので、調整手段により可動軸の操作を調整して接点
ギャップを調整することができる。In order to achieve the above object, the present invention provides a movable shaft in which a fixed electrode and a movable electrode which can be freely contacted and separated from each other are arranged in a vacuum container, and one end of which is fixed to the movable electrode. Since the adjusting means for adjusting the operation of the movable shaft of the shutoff portion including the vacuum valve airtightly drawn out of the vacuum container is provided, the contact gap can be adjusted by adjusting the operation of the movable shaft by the adjusting means. .
【０００７】[0007]
【実施例】以下、本発明の一実施例を図面を参照して説
明する。図１は本発明の一実施例を示す真空遮断器の全
体構造図である。同図において、１は真空バルブであ
り、真空バルブ１を開路する場合は、操作機構２による
主シャフト５の回転力がレバー３の回転力、さらに操作
ロッド４の直線運動（開路力）に変換され、真空バルブ
１の接点が開離される。このとき、主シャフト５に固着
されたレバー６に連結されたロッド７がダッシュポット
８に衝突し、真空遮断器の開路力は緩衝される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall structural diagram of a vacuum circuit breaker showing an embodiment of the present invention. In the figure, 1 is a vacuum valve, and when the vacuum valve 1 is opened, the rotational force of the main shaft 5 by the operating mechanism 2 is converted into the rotational force of the lever 3 and further the linear movement (opening force) of the operating rod 4. Then, the contact of the vacuum valve 1 is opened. At this time, the rod 7 connected to the lever 6 fixed to the main shaft 5 collides with the dashpot 8 and the open circuit force of the vacuum circuit breaker is buffered.
【０００８】図２は、図１の操作機構２の部分拡大図で
ある。同図において、ダッシュポット８は真空遮断器ベ
ース９に取付けられたベース10にナットにより取付けら
れている。緩衝作用のための可動部であるダッシュポッ
トピストン11には、中心に穴のあいたスペーサ12を被せ
ている。スペーサ12の穴部には、ピン13がスペーサ12頂
部より突出するように挿入されている。FIG. 2 is a partially enlarged view of the operating mechanism 2 shown in FIG. In the figure, the dashpot 8 is attached to the base 10 attached to the vacuum circuit breaker base 9 by a nut. A dashpot piston 11, which is a movable part for cushioning, is covered with a spacer 12 having a hole in the center. A pin 13 is inserted into the hole of the spacer 12 so as to project from the top of the spacer 12.
【０００９】この状態で、（ａ）の閉路時から（ｂ）の
開路時へ移行する真空遮断器の開路動作が開始される
と、主シャフト５とレバー６は反時計方向に回転し、レ
バー６にピンを介して連結されているロッド７は降下し
て、ピン13を介しダッシュポットピストン11に衝突す
る。これにより、真空遮断器の開路力は緩衝される。ロ
ッド７は更に降下し、スペーサ12の頂部と衝突して停止
する。In this state, when the opening operation of the vacuum circuit breaker which shifts from the closed state of (a) to the opened state of (b) is started, the main shaft 5 and the lever 6 rotate counterclockwise, and the lever is rotated. The rod 7, which is connected to 6 via a pin, descends and collides with the dashpot piston 11 via a pin 13. This damps the open circuit force of the vacuum circuit breaker. The rod 7 further descends, collides with the top of the spacer 12 and stops.
【００１０】このようなピン11とスペーサ12とをダッシ
ュポット部に装着したものにおいて、真空遮断器が開路
を完了した場合、スペーサ12の存在により主シャフト５
の閉極状態からの回転量が小さくなり、従ってレバー３
の回転量及び操作ロッド４の降下量が小さくなり、真空
バルブ１の接点ギャップ（図１（ａ）の“ａ”）は減少
する。In the case where the pin 11 and the spacer 12 are mounted on the dashpot portion, when the vacuum circuit breaker completes the circuit opening, the presence of the spacer 12 causes the main shaft 5 to move.
The amount of rotation from the closed state of the
The amount of rotation and the amount of lowering of the operating rod 4 are reduced, and the contact gap (“a” in FIG. 1A) of the vacuum valve 1 is reduced.
【００１１】以上のように本実施例によれば、真空度を
判定する際に必要な接点ギャップに容易に調整すること
ができる。このため真空度判定時の印加電圧を小さくす
ることができ、小容量設備で真空度の判定を行うことが
できる。As described above, according to this embodiment, it is possible to easily adjust the contact gap required for determining the degree of vacuum. Therefore, the applied voltage at the time of vacuum degree determination can be reduced, and the vacuum degree can be determined by a small capacity facility.
【００１２】さらに、ダッシュポットを利用することに
より、操作時において、操作機構に衝撃力を与えること
がなく、操作機構の寿命の低下を防ぐことができる。一
方、図３に本発明の他の実施例を示す真空遮断器の部分
拡大図である。同図において、操作ロッド４の下端はね
じ加工されている。両端がねじ加工されたピン14の上端
は操作ロッド４とねじれ結合され、ピン14の下端はダッ
シュポット８とねじれ結合されている。Furthermore, by utilizing the dashpot, it is possible to prevent the operating mechanism from being subjected to an impact force at the time of operation and to prevent the operating mechanism from having a reduced life. Meanwhile, FIG. 3 is a partially enlarged view of a vacuum circuit breaker showing another embodiment of the present invention. In the figure, the lower end of the operating rod 4 is threaded. The upper end of the pin 14 whose both ends are screwed is screwed to the operating rod 4, and the lower end of the pin 14 is screwed to the dashpot 8.
【００１３】この状態で、（ａ）の閉路時から（ｂ）の
開路時へ移行する真空遮断器の開路動作が開始される
と、前述の手順で操作ロッド４が降下する。操作ロッド
４が降下すると、最初にダッシュポットピストン11が真
空遮断器ベース９に衝突し、真空遮断器の開路力が緩衝
される。更に開路動作が進むと、ダッシュポット８の本
体と真空遮断器ベース９が衝突し、開極状態が保持され
る。In this state, when the opening operation of the vacuum circuit breaker, which shifts from the closed circuit of (a) to the open circuit of (b), is started, the operating rod 4 descends in the above-described procedure. When the operating rod 4 descends, the dashpot piston 11 first collides with the vacuum circuit breaker base 9 to buffer the open circuit force of the vacuum circuit breaker. When the opening operation further proceeds, the main body of the dashpot 8 and the vacuum circuit breaker base 9 collide with each other, and the open state is maintained.
【００１４】このような構成によれば、ピン14の長さを
任意に選定することにより、真空バルブ１の接点ギャッ
プを任意に減少することができる。なお、ダッシュポッ
ト８を使用せず、ピン14を真空遮断器ベース９に衝突さ
せるようにして真空バルブ１の接点ギャップを減少させ
るようにしてもよい。With such a structure, the contact gap of the vacuum valve 1 can be arbitrarily reduced by arbitrarily selecting the length of the pin 14. The contact gap of the vacuum valve 1 may be reduced by colliding the pin 14 with the vacuum circuit breaker base 9 without using the dashpot 8.
【００１５】[0015]
【発明の効果】以上のように本発明によれば、真空容器
内に接離自在の固定電極と可動電極が配設され、一端が
前記可動電極に固着する可動軸が前記真空容器外に気密
に導出した真空バルブを備える遮断部の可動軸の操作を
調整する調整手段を設けたので、真空度判定時に必要な
接点ギャップに調整することができ、小容量設備で真空
度判定を行える真空遮断器を得ることができる。As described above, according to the present invention, the fixed electrode and the movable electrode which are freely contactable and separable are arranged in the vacuum container, and the movable shaft whose one end is fixed to the movable electrode is hermetically sealed outside the vacuum container. Since the adjustment means for adjusting the operation of the movable shaft of the shutoff unit equipped with the vacuum valve that was introduced in 1. is provided, it is possible to adjust to the contact gap required when determining the degree of vacuum, and vacuum shutoff that enables the degree of vacuum determination with small capacity equipment. You can get a vessel.
【図１】本発明の一実施例を示す真空遮断器の構造図。FIG. 1 is a structural diagram of a vacuum circuit breaker showing an embodiment of the present invention.
【図２】［図１］の部分拡大図。FIG. 2 is a partially enlarged view of FIG.
【図３】本発明の他の実施例を示す真空遮断器の部分拡
大図。FIG. 3 is a partially enlarged view of a vacuum circuit breaker showing another embodiment of the present invention.
【図４】代表的な真空遮断器の真空度判定方法を説明す
るための図。FIG. 4 is a diagram for explaining a vacuum degree determination method for a typical vacuum circuit breaker.
１…真空バルブ、２…操作機構、３…レバー、４…操作
ロッド、７…ロッド、８…ダッシュポット、11…ダッシ
ュピストン、12…スペーサ、13，14…ピン。1 ... vacuum valve, 2 ... operating mechanism, 3 ... lever, 4 ... operating rod, 7 ... rod, 8 ... dash pot, 11 ... dash piston, 12 ... spacer, 13,14 ... pin.
Claims (6)
電極が配設され、一端が前記可動電極に固着する可動軸
が前記真空容器外に気密に導出した真空バルブを備える
遮断部と、一端が前記遮断部の可動軸側に接続した操作
ロッドに連結される駆動レバーと、主シャフトの回転力
による駆動力を前記駆動レバーの他端側に供給して前記
遮断部の可動軸を操作する操作手段と、この操作手段を
支持する遮断器ベースと、この遮断器ベースと操作手段
との間に設けられ、前記操作手段の駆動力を緩和して前
記遮断部の可動軸の操作を調整する調整手段とを有する
真空遮断器。1. A shut-off unit, in which a fixed electrode and a movable electrode, which can freely come into contact with and separate from each other, are arranged in a vacuum container, and a movable shaft, one end of which is fixed to the movable electrode, includes a vacuum valve airtightly drawn out of the vacuum container. , A drive lever having one end connected to an operation rod connected to the movable shaft side of the cutoff portion, and a driving force by the rotational force of the main shaft to the other end side of the drive lever to move the movable shaft of the cutoff portion. An operating means for operating, a circuit breaker base supporting the operating means, and a circuit breaker base provided between the circuit breaker base and the operating means are provided to relax the driving force of the operating means to operate the movable shaft of the breaking section. A vacuum circuit breaker having adjusting means for adjusting.
主シャフトに固着されたレバーに連結されるロッドと、
前記遮断器ベースに取り付けられたベースに固定され前
記ロッドと衝突可能な位置に設置されるダッシュポット
部とを有し、このダッシュポット部とロッドとの衝突に
より前記操作手段の駆動力を緩和するようにしたことを
特徴とする請求項１記載の真空遮断器。2. The rod, one end of which is connected to a lever fixed to a main shaft of the operating means,
A dashpot portion fixed to a base attached to the circuit breaker base and installed at a position where it can collide with the rod, and the driving force of the operating means is relaxed by the collision of the dashpot portion and the rod. The vacuum circuit breaker according to claim 1, characterized in that.
トピストンと、中心部に前記ロッドの外径より小さい挿
入口が形成されるスペーサと、このスペーサの挿入口の
下部に一端が挿入されるダッシュポットピストンと、前
記スペーサの挿入口の上部から突出し前記ロッドとダッ
シュポットピストンとの間に設置されるピンとを備えた
ことを特徴とする請求項２記載の真空遮断器。3. The dashpot portion includes a dashpot piston, a spacer having an insertion opening smaller than an outer diameter of the rod formed at a central portion, and a dashpot having one end inserted below a insertion opening of the spacer. The vacuum circuit breaker according to claim 2, further comprising a piston, and a pin protruding from an upper portion of the insertion port of the spacer and installed between the rod and the dashpot piston.
電極が配設され、一端が前記可動電極に固着する可動軸
が前記真空容器外に気密に導出した真空バルブを備える
遮断部と、一端が前記遮断部の可動軸側に接続した操作
ロッドに連結される駆動レバーと、主シャフトの回転力
による駆動力を前記駆動レバーの他端側に供給して前記
遮断部の可動軸を操作する操作手段と、この操作手段を
支持する遮断器ベースと、この遮断器ベースと前記操作
ロッドとの間に設けられ、前記可動軸の操作を緩和する
調整手段とを有する真空遮断器。4. A shutoff unit, in which a fixed electrode and a movable electrode, which can be contacted and separated from each other, are disposed in a vacuum container, and a movable shaft having one end fixed to the movable electrode is equipped with a vacuum valve which is airtightly drawn out of the vacuum container. , A drive lever having one end connected to an operation rod connected to the movable shaft side of the cutoff portion, and a driving force by the rotational force of the main shaft to the other end side of the drive lever to move the movable shaft of the cutoff portion. A vacuum circuit breaker comprising: operating means for operating; a circuit breaker base supporting the operating means; and adjusting means provided between the circuit breaker base and the operating rod for relaxing the operation of the movable shaft.
に連結されるピンと、このピンの他端に取り付けられる
ダッシュポット部とを有し、前記操作ロッドの降下によ
りダッシュポット部が前記遮断器ベースに衝突して前記
可動軸の操作を緩和するようにしたことを特徴とする請
求項４記載の真空遮断器。5. The adjusting means has a pin whose one end is connected to the operation rod, and a dashpot portion attached to the other end of the pin, and the dashpot portion is provided with the dashpot portion when the operation rod descends. 5. The vacuum circuit breaker according to claim 4, wherein the operation of the movable shaft is relieved by colliding with the base.
に連結されるピンが、前記操作ロッドの降下により前記
遮断器ベースに衝突して前記可動軸の操作を緩和するよ
うにしたことを特徴とする請求項４記載の真空遮断器。6. The adjusting means is characterized in that a pin, one end of which is connected to the operating rod, collides with the circuit breaker base due to the lowering of the operating rod, thereby relaxing the operation of the movable shaft. The vacuum circuit breaker according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12335494A JPH07335095A (en) | 1994-06-06 | 1994-06-06 | Vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12335494A JPH07335095A (en) | 1994-06-06 | 1994-06-06 | Vacuum circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07335095A true JPH07335095A (en) | 1995-12-22 |
Family
ID=14858505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12335494A Pending JPH07335095A (en) | 1994-06-06 | 1994-06-06 | Vacuum circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07335095A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100323739B1 (en) * | 1999-11-08 | 2002-02-19 | 이종수 | ciruit trip device with function for controlling trip time in MCCB |
| WO2011086670A1 (en) * | 2010-01-13 | 2011-07-21 | 三菱電機株式会社 | Electromagnetically-operated switching device |
-
1994
- 1994-06-06 JP JP12335494A patent/JPH07335095A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100323739B1 (en) * | 1999-11-08 | 2002-02-19 | 이종수 | ciruit trip device with function for controlling trip time in MCCB |
| WO2011086670A1 (en) * | 2010-01-13 | 2011-07-21 | 三菱電機株式会社 | Electromagnetically-operated switching device |
| JP5490147B2 (en) * | 2010-01-13 | 2014-05-14 | 三菱電機株式会社 | Electromagnetic operation switchgear |
| US8754730B2 (en) | 2010-01-13 | 2014-06-17 | Mitsubishi Electric Corporation | Electromagnetically operated switching device |
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