JPH04282522A - Buffer type gas breaker with closing resistance - Google Patents
Buffer type gas breaker with closing resistanceInfo
- Publication number
- JPH04282522A JPH04282522A JP4513191A JP4513191A JPH04282522A JP H04282522 A JPH04282522 A JP H04282522A JP 4513191 A JP4513191 A JP 4513191A JP 4513191 A JP4513191 A JP 4513191A JP H04282522 A JPH04282522 A JP H04282522A
- Authority
- JP
- Japan
- Prior art keywords
- closing
- contact
- electrode
- movable
- side electrode
- 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
- 239000000872 buffer Substances 0.000 title claims description 46
- 230000007246 mechanism Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 239000004020 conductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Circuit Breakers (AREA)
Abstract
Description
【0001】[発明の目的][Object of the invention]
【0002】0002
【産業上の利用分野】本発明は、電力系統の変電所ある
いは開閉所に用いられる投入抵抗付きパッファ形ガス遮
断器に係り、特に、遮断動作時に働く荷重の低減を図っ
た投入抵抗付きパッファ形ガス遮断器に関するものであ
る。[Industrial Field of Application] The present invention relates to a puffer type gas circuit breaker with a closing resistor used in substations or switchyards of power systems, and in particular, the present invention relates to a puffer type gas circuit breaker with a closing resistor that is designed to reduce the load applied during the breaking operation. This relates to gas circuit breakers.
【0003】0003
【従来の技術】近年、送電系統の大容量化が進んでいる
ため、変電所や開閉所に用いられる遮断器の遮断容量は
増大する傾向にある。そのため、遮断器に対しては一層
の信頼性が要求されている。遮断器の信頼性を高めるた
めには、部品点数を少なくし、構造を単純化することが
重要である。この構造の単純化を実現するために、遮断
点数の削減が望まれている。例えば、550KV系統で
は遮断電流が50KAの2点切りパッファ形ガス遮断器
が実用化されているが、これを1点切り化することが要
求されている。一般に、この様な大容量の遮断器を1点
切り化する場合、その遮断性能を向上させるためには、
従来の2点切りの遮断器の開極速度に比べて、その開極
速度を格段に早くする必要がある。2. Description of the Related Art In recent years, as power transmission systems have become larger in capacity, the breaking capacity of circuit breakers used in substations and switchyards has tended to increase. Therefore, circuit breakers are required to have even higher reliability. In order to improve the reliability of circuit breakers, it is important to reduce the number of parts and simplify the structure. In order to simplify this structure, it is desired to reduce the number of interruption points. For example, in a 550 KV system, a two-point puffer type gas circuit breaker with a breaking current of 50 KA has been put into practical use, but there is a demand for a one-point break. Generally, when cutting a large-capacity circuit breaker like this at one point, in order to improve its breaking performance,
The opening speed needs to be much faster than that of a conventional two-point circuit breaker.
【0004】ところで、168KV以上の送電電圧では
、絶縁性ガスとしてSF6 ガスを用いたパッファ形ガ
ス遮断器が主に使用されている。これは、SF6 ガス
が優れた遮断性能及び絶縁性能を有するという点に加え
て、2圧式に比べて構造が単純であるという長所を持っ
ている。また、変電所の機器全体をSF6 ガスで絶縁
する密閉形ガス開閉装置においては、他の機器との絶縁
強調や機器の配置等で更にメリットが大きい。そのため
、パッファ形ガス遮断器は高電圧遮断器の主流となって
いる。By the way, for power transmission voltages of 168 KV or higher, puffer type gas circuit breakers using SF6 gas as the insulating gas are mainly used. This has the advantage that in addition to the fact that SF6 gas has excellent blocking and insulating performance, the structure is simpler than the two-pressure type. Furthermore, in a sealed gas switchgear that insulates the entire substation equipment with SF6 gas, there are even greater benefits in terms of emphasis on insulation from other equipment, equipment placement, etc. For this reason, puffer type gas circuit breakers have become the mainstream of high voltage circuit breakers.
【0005】また、この様なパッファガス遮断器を55
0KV級の大容量系統における線路用として用いる場合
、投入時の投入過電圧を抑制するために投入抵抗方式が
採用されている。これは、パッファ形ガス遮断器の主接
点部と並列に、投入抵抗を有する投入抵抗接点部を設け
、投入時には主接点部に先だってこの投入抵抗接点部を
投入し、その投入抵抗により投入過電圧を抑制した状態
で主接点部を投入するものである。この方式の開極時に
おいては、まず投入抵抗接点部が開離し、次いで主接点
部が開極することが必要である。[0005] In addition, such a puffer gas circuit breaker is
When used as a line in a 0KV class large-capacity system, a closing resistance method is adopted to suppress the closing overvoltage at the time of closing. In this system, a closing resistor contact section with a closing resistor is installed in parallel with the main contact section of the puffer type gas circuit breaker.When closing, this closing resistor contact section is closed before the main contact section, and the closing overvoltage is suppressed by the closing resistance. The main contact part is closed in a suppressed state. When opening in this method, it is necessary to first open the closing resistance contact section and then open the main contact section.
【0006】この様な投入抵抗付きパッファ形ガス遮断
器の一例を図3に示した。なお、図3は投入抵抗付きパ
ッファ形ガス遮断器の遮断状態を示しており、この遮断
器はSF6 ガス等の絶縁性ガスを封入した図示しない
タンク内に収納されるものである。An example of such a puffer type gas circuit breaker with a closing resistor is shown in FIG. Note that FIG. 3 shows the cut-off state of a puffer type gas circuit breaker with a closing resistor, and this circuit breaker is housed in a tank (not shown) filled with an insulating gas such as SF6 gas.
【0007】図において、図示しないタンク内には絶縁
筒9が設けられており、この絶縁筒9には水平方向に延
びるベース8が固定されている。ベース8の先端部には
パッファピストン7が固定されており、パッファピスト
ン7の中央には取付穴が貫通されており、この取付穴に
は水平方向に延びるパッファシリンダ2が摺動自在に取
付けられている。このパッファシリンダ2と前記パッフ
ァピストン7とで囲まれた空間がパッファ室10になっ
ている。In the figure, an insulating cylinder 9 is provided inside a tank (not shown), and a base 8 extending horizontally is fixed to this insulating cylinder 9. A puffer piston 7 is fixed to the tip of the base 8, and a mounting hole is passed through the center of the puffer piston 7, and a horizontally extending puffer cylinder 2 is slidably mounted in this mounting hole. ing. A space surrounded by the puffer cylinder 2 and the puffer piston 7 is a puffer chamber 10.
【0008】また、パッファシリンダ2の先端部には、
主接点用可動側電圧1が設けられている。この主接点用
可動側電圧1の外周部には絶縁ノズル3及び可動通電接
触子4が同心円状に配設されている。[0008] Furthermore, at the tip of the puffer cylinder 2,
A movable side voltage 1 for the main contact is provided. An insulating nozzle 3 and a movable current-carrying contact 4 are arranged concentrically around the outer periphery of the main contact movable voltage 1.
【0009】更にパッファシリンダ2の後端部には、水
平方向に延びた絶縁操作ロッド6が取付けられている。
この絶縁操作ロッド6には図示しない操作機構が接続さ
れており、その駆動力によってパッファシリンダ2が水
平方向に往復動するように構成されている。また、絶縁
操作ロッド6にはこのロッド6に対して垂直下方に延び
たレバー5が取付けられている。Furthermore, an insulated operating rod 6 extending horizontally is attached to the rear end of the puffer cylinder 2. An operating mechanism (not shown) is connected to the insulated operating rod 6, and the puffer cylinder 2 is configured to reciprocate in the horizontal direction by its driving force. Further, a lever 5 is attached to the insulated operating rod 6 and extends vertically downward with respect to the rod 6.
【0010】また、前記主接点用可動側電圧1と対向し
て通電用導体12が配設されており、この通電用導体1
2の中央には前記主接点用可動側電圧1に接離自在な主
接点用固定側電圧11が固定されている。この主接点用
固定側電圧11の外周部には、前記可動通電接触子4と
接触する固定通電接触子13が設けられている。Further, a current-carrying conductor 12 is arranged opposite to the movable side voltage 1 for the main contact, and this current-carrying conductor 1
A fixed side voltage 11 for the main contact, which can be freely connected to and separated from the movable side voltage 1 for the main contact, is fixed at the center of the main contact 2 . A fixed current-carrying contact 13 that comes into contact with the movable current-carrying contact 4 is provided on the outer periphery of this main contact fixed-side voltage 11 .
【0011】なお、上記主接点用固定側電圧11と前記
の主接点用可動側電圧1とによって遮断器の主接点部が
構成される。The main contact portion of the circuit breaker is constituted by the fixed side voltage 11 for the main contact and the movable side voltage 1 for the main contact.
【0012】ところで、パッファ形ガス遮断器には遮断
器投入時の過電圧を抑制するために投入抵抗接点部が前
記主接点部と電気的に並列に接続されている。この投入
抵抗接点部の主要部は、投入抵抗接点用可動側電極14
、投入抵抗接点用固定側電極15、投入抵抗体17から
構成される。Incidentally, in a puffer type gas circuit breaker, a closing resistance contact section is electrically connected in parallel with the main contact section in order to suppress overvoltage when the circuit breaker is closed. The main part of this making resistance contact part is the movable side electrode 14 for making resistance contact.
, a fixed side electrode 15 for a closing resistance contact, and a closing resistor 17.
【0013】更に詳しく投入抵抗接点部の構成を説明す
る。すなわち、投入抵抗接点用可動側電極14は前記レ
バー5の先端部にパッファシリンダ2と平行に取付けら
れている。この投入抵抗接点用可動側電極14は電極1
4の外周面に摺動する摺動部18を介して前記主接点用
可動側電圧1に電気的に接続される。The structure of the closing resistance contact section will be explained in more detail. That is, the movable electrode 14 for the closing resistance contact is attached to the tip of the lever 5 in parallel with the puffer cylinder 2. This movable side electrode 14 for making resistance contact is the electrode 1
It is electrically connected to the movable side voltage 1 for the main contact via a sliding portion 18 that slides on the outer peripheral surface of the main contact.
【0014】また、前記通電用導体12の下端部にはス
ペーサ22が設けられており、このスペーサ22を介し
て水平方向に固定側シリンダ20が設けられている。固
定側シリンダ20は前記投入抵抗接点用可動側電極14
と対向する位置に配置されており、前記接点用可動側電
極14との対向面側に開口部が形成されている。A spacer 22 is provided at the lower end of the current-carrying conductor 12, and a fixed cylinder 20 is provided horizontally via this spacer 22. The fixed cylinder 20 is connected to the movable electrode 14 for the closing resistance contact.
, and an opening is formed on the side facing the movable contact electrode 14 .
【0015】また、投入抵抗接点用固定側電極15は前
記固定側シリンダ20内に復帰バネ16と共に収納され
ている。この投入抵抗接点用固定側電極15はその先端
が固定側シリンダ20の開口部から突出して前記投入抵
抗接点用可動側電極14と接離自在に配置されており、
復帰バネ16によって前記の可動側電極14側に常に付
勢されている。更に、投入抵抗接点用固定側電極15と
固定側シリンダ20に囲まれた空間がガス圧縮室21に
なっている。また、投入抵抗接点用固定電極15にはガ
ス圧縮室21内のガスを逃がすガス抜き穴19が設けら
れている。Further, the fixed side electrode 15 for the closing resistance contact is housed in the fixed side cylinder 20 together with a return spring 16. The fixed side electrode 15 for the making resistance contact has its tip protruding from the opening of the fixed side cylinder 20 and is arranged so as to be able to freely come into contact with and separate from the movable side electrode 14 for the making resistance contact.
The return spring 16 always urges the movable electrode 14 side. Further, a space surrounded by the fixed side electrode 15 for the closing resistance contact and the fixed side cylinder 20 is a gas compression chamber 21 . Further, the fixed electrode 15 for the closing resistance contact is provided with a gas vent hole 19 through which the gas in the gas compression chamber 21 escapes.
【0016】また、投入抵抗体17は固定側シリンダ2
0の外部に設けられており、この投入抵抗体17を介し
て、固定側シリンダ20内の投入抵抗接点用固定側電極
15と、前記通電導体12とが電気的に接続されている
。Furthermore, the closing resistor 17 is connected to the fixed cylinder 2.
The closing resistor contact fixed electrode 15 in the fixed cylinder 20 is electrically connected to the current-carrying conductor 12 via the closing resistor 17 .
【0017】以上の様に構成された投入抵抗付きパッフ
ァ形ガス遮断器は、以下に述べるように動作する。すな
わち、図3に示した遮断状態において、図示しない操作
機構を駆動すると、それに連結された絶縁操作ロッド6
が図中左方向へ移動し、主接点用可動側電極1が主接点
用固定側電極11に投入される。The puffer type gas circuit breaker with closing resistor constructed as described above operates as described below. That is, in the cut-off state shown in FIG. 3, when the operating mechanism (not shown) is driven, the insulated operating rod 6 connected to it
moves to the left in the figure, and the movable main contact electrode 1 is inserted into the fixed main contact electrode 11.
【0018】また、絶縁操作ロッド6の移動に伴って、
レバー5も図中左方向へ移動し、それと共に投入抵抗接
点用可動側電極14も図中左方向へ移動して、投入抵抗
接点用固定側電極15に投入される。この様な投入抵抗
接点部の投入動作は、主接点の投入動作よりも早いタイ
ミングで行われる。Furthermore, as the insulating operation rod 6 moves,
The lever 5 also moves to the left in the drawing, and at the same time, the movable electrode 14 for the making resistance contact also moves to the left in the drawing, and is thrown into the fixed electrode 15 for the making resistance contact. Such a closing operation of the closing resistance contact portion is performed at an earlier timing than the closing operation of the main contact.
【0019】更に、投入動作時にガス圧縮室21内のガ
スが投入抵抗接点用固定側電極15によって圧縮される
ため、ガス圧縮室21が投入抵抗接点用固定側電極15
に対するダンパとして作用し、投入抵抗接点部のチャタ
リングを抑制する。Furthermore, since the gas in the gas compression chamber 21 is compressed by the fixed side electrode 15 for the closing resistance contact during the closing operation, the gas compression chamber 21 is compressed by the fixed side electrode 15 for the closing resistance contact.
This acts as a damper for suppressing the chattering of the closing resistance contact.
【0020】一方、遮断動作時には絶縁操作ロッド6に
固定されたパッファシリンダ2が、図中右方向に移動す
る。その結果、パッファピストン7とパッファシリンダ
2によって形成されるパッファ室10が圧縮されるので
、パッファ室10内部の消弧ガスが絶縁ノズル3に案内
されて、開離する主接点用可動と主接点用固定電極11
の間に吹き付けられ、消弧動作がなされる。On the other hand, during the shutoff operation, the puffer cylinder 2 fixed to the insulated operating rod 6 moves rightward in the figure. As a result, the puffer chamber 10 formed by the puffer piston 7 and the puffer cylinder 2 is compressed, so that the arc-extinguishing gas inside the puffer chamber 10 is guided to the insulating nozzle 3, and the movable main contact and the main contact are separated. Fixed electrode 11
The arc is extinguished by being sprayed during this period.
【0021】また、投入抵抗接点用可動側電極14も投
入抵抗接点用固定側電極15との開離動作を行うが、復
帰バネ16の応答遅れによって、投入抵抗接点用可動電
極14が動き出した瞬間に両電極14,15は開離し、
ワイプのある主接点の開極動作よりも早いタイミングと
なる。Furthermore, the movable electrode 14 for the closing resistance contact also performs a separating operation from the fixed electrode 15 for the closing resistance contact, but due to the response delay of the return spring 16, the moment the movable electrode 14 for the closing resistance contact begins to move. Both electrodes 14 and 15 are separated,
This timing is earlier than the opening operation of the main contact with wipe.
【0022】以上のような投入抵抗付きパッファ形ガス
遮断器によれば、構造が単純であると同時に、投入抵抗
接点部により投入時の過電圧を抑制するため、大容量電
流を遮断する際にも優れた信頼性を発揮できる。[0022] According to the puffer type gas circuit breaker with closing resistor as described above, the structure is simple, and at the same time, the overvoltage at the time of closing is suppressed by the closing resistor contact part, so that it can be used even when interrupting a large current. Demonstrates excellent reliability.
【0023】[0023]
【発明が解決しようとする課題】しかしながら、上記の
ような投入抵抗付きパッファ形ガス遮断器に対し、構造
の単純化を目的として遮断点数の削減を図った場合、次
のような不具合を生じた。すなわち、前述したように遮
断点数を削減した上で優れた遮断性能を確保するには、
主接点部の開極速度を格段に速くする必要がある。この
様な主接点部の開極速度の上昇は、遮断動作時に働く慣
性力の増大を招き、そのため、各部材に働く応力が大き
くなった。[Problem to be Solved by the Invention] However, when attempting to reduce the number of breaking points for the above-mentioned puffer type gas circuit breaker with closing resistor for the purpose of simplifying the structure, the following problems occurred. . In other words, in order to ensure excellent interrupting performance while reducing the number of interrupting points as described above,
It is necessary to significantly increase the opening speed of the main contact. Such an increase in the opening speed of the main contact portion causes an increase in the inertial force that acts during the breaking operation, and therefore, the stress that acts on each member increases.
【0024】特に、図3に示した従来の投入抵抗付きパ
ッファ形ガス遮断器において、投入抵抗接点用可動側電
極14やレバー5の配設位置は、絶縁操作ロッド6に対
して偏心しているため、遮断動作時に働く慣性力の影響
によって大きな力のモーメントを生じる原因となってい
た。In particular, in the conventional puffer type gas circuit breaker with closing resistor shown in FIG. This caused a large moment of force to be generated due to the influence of inertial force during the shutoff operation.
【0025】ここで、図4に、遮断動作時にレバー5に
働く図3中矢印方向の力のモーメントT0 の理論値の
一例を示す。図に示したように、遮断動作終了時付近で
は投入抵抗接点用可動側電極14等に大きな慣性力が働
くため、力のモーメントT0 も非常に大きくなる。従
って、レバー5に大きな力のモーメントが働く為、絶縁
操作ロッド6やパッファシリンダ2及びパッファシリン
ダ2の支持部材あるいはパッファシリンダ2が摺動する
部位等に大きな荷重が働き、破損等の原因となっていた
。FIG. 4 shows an example of the theoretical value of the moment T0 of the force acting on the lever 5 in the direction of the arrow in FIG. 3 during the shutoff operation. As shown in the figure, near the end of the breaking operation, a large inertial force acts on the movable side electrode 14 for the closing resistance contact, etc., so the moment T0 of the force also becomes very large. Therefore, since a large moment of force is applied to the lever 5, a large load is applied to the insulated operating rod 6, the puffer cylinder 2, the supporting member of the puffer cylinder 2, the parts on which the puffer cylinder 2 slides, etc., which may cause damage. was.
【0026】この様な欠点を解消するために、構成部材
の機械的強度を高める必要が増し、部材の肉厚を増やす
等の方策が考えられる。しかし、両接点部の可動部分の
重量増加につながるため、開極速度が鈍化して必要な開
極速度を得られなくなる。In order to eliminate such drawbacks, there is an increasing need to increase the mechanical strength of the constituent members, and measures such as increasing the wall thickness of the members may be considered. However, since this leads to an increase in the weight of the movable parts of both contact portions, the opening speed slows down, making it impossible to obtain the required opening speed.
【0027】そこで、必要な開極速度を得るために両接
点部の可動部分への駆動力の増大を図ることが考えられ
る。ところが、駆動力を増大させるためには操作機構部
の大形化が必要になる。その結果、機器全体の大形化を
招き、且つ構造が複雑化され易いという問題点があった
。[0027] Therefore, in order to obtain the necessary opening speed, it is conceivable to increase the driving force to the movable parts of both contact portions. However, in order to increase the driving force, it is necessary to increase the size of the operating mechanism. As a result, there are problems in that the overall size of the device increases and the structure tends to become complicated.
【0028】本発明は、この様な従来技術の持つ問題点
を解決するために提案されたものであり、その目的は、
遮断動作時に働く荷重を低減し、高い開極速度を確保し
て、構造の単純化及び信頼性の向上を図ると共に、操作
機構部の小形化に寄与できる投入抵抗付きパッファ形ガ
ス遮断器を提供することにある。The present invention was proposed to solve the problems of the prior art, and its purpose is to:
We provide a puffer-type gas circuit breaker with closing resistance that reduces the load applied during breaking operation, ensures high opening speed, simplifies the structure and improves reliability, and contributes to the miniaturization of the operating mechanism. It's about doing.
【0029】[発明の構成][Configuration of the invention]
【0030】[0030]
【課題を解決するための手段】上記目的を達成する為に
、本発明の投入抵抗付きパッファ形ガス遮断器は、主接
点部の可動側電極を投入動作方向及び遮断動作方向に駆
動する移動自在な絶縁操作ロッドに、この絶縁操作ロッ
ドの移動方向と直交する方向に延びるレバーを設け、レ
バーの先端部に投入抵抗接点用可動側電極を設けると共
に、投入抵抗接点用可動側電極の遮断動作方向側に投入
抵抗接点用可動側電極が当接されるダンパが設けられた
ことを特徴とするものである。[Means for Solving the Problems] In order to achieve the above object, the puffer type gas circuit breaker with closing resistor of the present invention is provided with a movable side electrode of the main contact portion that is movable to drive in the closing operation direction and the disconnection operation direction. An insulated operating rod is provided with a lever that extends in a direction perpendicular to the moving direction of the insulated operating rod, and a movable electrode for the closing resistance contact is provided at the tip of the lever, and a lever that extends in the direction of the breaking operation of the movable electrode for the closing resistance contact is provided at the tip of the lever. It is characterized in that a damper is provided on the side of the movable side electrode for the making resistance contact.
【0031】[0031]
【作用】以上のような構成を有する本発明においては、
遮断動作終了付近にて投入抵抗接点用可動側電極に大き
な慣性力が働いて、レバーに大きな力のモーメントが加
わる。ところが、遮断動作終了付近では投入抵抗接点用
可動側電極がダンパが当接する。これにより、レバーに
働く力はダンパから投入抵抗接点用可動側電極に働く反
力によって軽減される。従って、レバーに働く力のモー
メントの最大値を極めて小さくすることができる。[Operation] In the present invention having the above configuration,
Near the end of the breaking operation, a large inertial force acts on the movable electrode for the closing resistance contact, and a large moment of force is applied to the lever. However, near the end of the breaking operation, the movable electrode for the closing resistance contact comes into contact with the damper. Thereby, the force acting on the lever is reduced by the reaction force acting from the damper on the movable side electrode for the closing resistance contact. Therefore, the maximum value of the moment of force acting on the lever can be made extremely small.
【0032】[0032]
【実施例】以下に、本発明による投入抵抗付きパッファ
形ガス遮断器の一実施例を、図1及び図2を参照して具
体的に説明する。なお、図3に示した従来例と同一部材
に関しては同一符号を付し、説明は省略する。図1は投
入状態、図2は遮断状態を示している。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a puffer type gas circuit breaker with a closing resistor according to the present invention will be described in detail below with reference to FIGS. 1 and 2. Note that the same members as those in the conventional example shown in FIG. 3 are designated by the same reference numerals, and explanations thereof will be omitted. FIG. 1 shows the closed state, and FIG. 2 shows the closed state.
【0033】図1及び図2に示すように、ベース8にお
ける投入抵抗接点用可動側電極14と対向する位置には
、水平方向に可動側シリンダ27が設けられている。
つまり、この可動側シリンダ27、投入抵抗接点用可動
側電極14、投入抵抗接点用固定側電極15及び固定側
シリンダ27は同一直線上に配置されている。As shown in FIGS. 1 and 2, a movable cylinder 27 is provided in the horizontal direction on the base 8 at a position facing the movable electrode 14 for the closing resistance contact. In other words, the movable cylinder 27, the movable electrode 14 for the making resistance contact, the fixed electrode 15 for the making resistance contact, and the fixed cylinder 27 are arranged on the same straight line.
【0034】また、可動側シリンダ27内にはシリンダ
内を摺動するダンパ23及びこのダンパ23を投入抵抗
接点用可動側電極14側に付勢する復帰バネ26が収納
配置されている。Further, a damper 23 that slides within the cylinder and a return spring 26 that urges the damper 23 toward the movable electrode 14 for the closing resistance contact are housed in the movable cylinder 27.
【0035】ダンパ23先端部は投入抵抗接点用可動側
電極14の端部に当接するように可動側シリンダ27か
ら突出して設けられており、常に可動側シリンダ27内
に配置されているダンパ23基部にはガス抜き穴24が
開口されている。また、可動側シリンダ27とダンパ2
3に囲まれた空間はガス圧縮室25になっている。The tip of the damper 23 is provided to protrude from the movable cylinder 27 so as to come into contact with the end of the movable electrode 14 for the closing resistance contact, and the base of the damper 23 is always disposed within the movable cylinder 27. A gas vent hole 24 is opened in the. In addition, the movable cylinder 27 and the damper 2
The space surrounded by 3 is a gas compression chamber 25.
【0036】この様な構成を有する本実施例における作
用は次の通りである。なお、本実施例の投入動作は、図
3にて示した従来例の投入動作と等しいため、説明は省
略する。また、本実施例の遮断動作において、消弧動作
及び開極動作もまた図3にて示した従来例の投入動作と
等しいため、説明は省略する。The operation of this embodiment having such a configuration is as follows. Note that the closing operation of this embodiment is the same as the closing operation of the conventional example shown in FIG. 3, so a description thereof will be omitted. Furthermore, in the breaking operation of this embodiment, the arc-extinguishing operation and the opening operation are also the same as the closing operation of the conventional example shown in FIG. 3, so their explanations will be omitted.
【0037】すなわち、本実施例の遮断動作に伴って投
入抵抗接点用可動側電極14と投入抵抗接点用固定側電
極15との開離動作が行われる。この時、投入抵抗接点
用可動側電極14は図中右方向に移動し、この開離動作
終期付近にて投入抵抗接点用可動側電極14の端部はダ
ンパ23に当接する。開離動作が進むと投入抵抗接点用
可動側電極14は図中右方向に移動し、その端部は復帰
バネ26の付勢力に抗してダンパ23を可動側シリンダ
27内に押圧する。これにより、ダンパ23がガス圧縮
室25内のガスを圧縮する。That is, in conjunction with the breaking operation of this embodiment, the movable side electrode 14 for the making resistance contact and the fixed side electrode 15 for the making resistance contact are opened and separated. At this time, the movable electrode 14 for the closing resistance contact moves rightward in the drawing, and the end of the movable electrode 14 for the closing resistance contact contacts the damper 23 near the end of this opening operation. As the opening operation progresses, the closing resistance contact movable electrode 14 moves rightward in the figure, and its end presses the damper 23 into the movable cylinder 27 against the biasing force of the return spring 26. Thereby, the damper 23 compresses the gas in the gas compression chamber 25.
【0038】ここで、図5に、本実施例における遮断動
作時のガス圧縮室25内の圧力変化の理論値Pを示す。
ガス圧縮室25内の圧力上昇によってダンパ23からレ
バー5に働く力のモーメントTD は、次の(1)式に
よって表される。FIG. 5 shows the theoretical value P of the pressure change inside the gas compression chamber 25 during the shutoff operation in this embodiment. The moment TD of the force acting on the lever 5 from the damper 23 due to the rise in pressure within the gas compression chamber 25 is expressed by the following equation (1).
【0039】[0039]
【数1】[Math 1]
【0040】ここで、Pはガス圧縮室25内の圧力、P
φは図示しない容器のガスの充気圧力、Scはシリンダ
27の内径側断面積、Lはレバー5の長さである。Here, P is the pressure inside the gas compression chamber 25, P
φ is the filling pressure of gas in a container (not shown), Sc is the cross-sectional area on the inner diameter side of the cylinder 27, and L is the length of the lever 5.
【0041】本実施例では、レバー5に働く力のモーメ
ントの総和Tは、前述した投入抵抗接点用可動側電極1
4等に働く慣性力による力のモーメントT0と、ダンパ
から働く力のモーメントTD との和になり、次の(2
)式によって表される。In this embodiment, the total moment T of the force acting on the lever 5 is the movable side electrode 1 for the making resistance contact described above.
It is the sum of the moment T0 of the force due to the inertial force acting on the damper, and the moment TD of the force acting on the damper, and the following (2
) is expressed by the formula.
【0042】T=T0 +TD …(2)また、図
6は、慣性力による力のモーメントT0 、ダンパから
働く力のモーメントTD 及び力のモーメントの総和T
の理論値を示している。この図から明らかなように、ダ
ンパ23から働く力のモーメントTD によって、慣性
力による力のモーメントT0 が軽減されるため、力の
モーメントの総和Tの最大値TMAX は、図4にて示
した従来の力のモーメントの総和であるT0 の最大値
T0MAXよりも、非常に小さくなる。T=T0 +TD (2) Also, FIG. 6 shows the moment of force T0 due to inertial force, the moment of force TD acting from the damper, and the sum of the moments of force T
shows the theoretical value of As is clear from this figure, the moment T0 of force due to inertia force is reduced by the moment TD of force acting from the damper 23, so the maximum value TMAX of the total moment T of force is lower than that of the conventional method shown in FIG. It is much smaller than the maximum value T0MAX of T0, which is the sum of the moments of force.
【0043】以上述べたような本実施例によれば、可動
側シリンダ27内のガス圧縮室25における圧力上昇を
利用してダンパ23から働く力のモーメントを獲得し、
この力のモーメントの作用によって、遮断動作時の慣性
力によりレバー5に働く力のモーメントを、低減するこ
とができる。そのため、絶縁操作ロッド6、パッファシ
リンダ2及びパッファシリンダ2の支持部材あるいは摺
動する部位等に働く荷重を低減することができる。その
結果、主接点部の開極速度を確実に上げることができ、
優れた遮断性能を確保しつつ遮断点数を削減することが
可能となる。従って、構造を単純化することができ、信
頼性を高めることができる。According to this embodiment as described above, the moment of the force acting from the damper 23 is obtained by utilizing the pressure increase in the gas compression chamber 25 in the movable cylinder 27,
Due to the action of this moment of force, the moment of force acting on the lever 5 due to the inertial force during the shutoff operation can be reduced. Therefore, it is possible to reduce the load acting on the insulating operation rod 6, the puffer cylinder 2, the support member of the puffer cylinder 2, or the sliding portion thereof. As a result, the opening speed of the main contact can be reliably increased,
It becomes possible to reduce the number of interrupting points while ensuring excellent interrupting performance. Therefore, the structure can be simplified and reliability can be improved.
【0044】また、これらの部材の機械的強度を向上す
ることができ、しかも操作機構の小形化に寄与でき、構
造の単純化に貢献できる。[0044] Furthermore, the mechanical strength of these members can be improved, and moreover, it can contribute to downsizing of the operating mechanism and simplifying the structure.
【0045】なお、本発明は、前記実施例に限定される
ものではなく、例えばダンパとしては、本実施例のよう
にガス圧力を利用したガスダンパに限らず、オイルダン
パ等を用いても同様の効果を得ることができる。また、
ガス抜き穴の大きさを変えることによって遮断機の仕様
等に合せて自由に設定可能である。It should be noted that the present invention is not limited to the above-mentioned embodiments, and for example, the damper is not limited to a gas damper that utilizes gas pressure as in this embodiment, but an oil damper or the like may also be used. effect can be obtained. Also,
By changing the size of the gas vent hole, it can be freely set according to the specifications of the circuit breaker.
【0046】[0046]
【発明の効果】以上述べたように、本発明によれば、主
接点部の可動側電極を駆動する絶縁操作ロッドに、この
絶縁操作ロッドと直交するレバーを設け、このレバーの
先端に投入抵抗接点用可動側電極を設け、更に投入抵抗
接点用可動側電極の遮断動作方向側にダンパを設けるこ
とによって、遮断動作時に働く荷重を低減することがで
きるため、主接点部の開極速度を確実に上げて遮断点数
の削減が可能となる。そのため、構造を単純化して、信
頼性を高めることができる。また、遮断動作時に働く荷
重を低減できるため、操作機構部の小形化に寄与するこ
とができる。As described above, according to the present invention, the insulated operating rod that drives the movable side electrode of the main contact portion is provided with a lever orthogonal to the insulated operating rod, and the closing resistor is attached to the tip of the lever. By providing a movable side electrode for the contact and further providing a damper on the side of the movable side electrode for the closing resistance contact in the breaking operation direction, the load applied during the breaking operation can be reduced, so the opening speed of the main contact section can be ensured. It is possible to reduce the number of interruption points by increasing the number of interruption points. Therefore, the structure can be simplified and reliability can be increased. Further, since the load applied during the shutoff operation can be reduced, it is possible to contribute to downsizing of the operating mechanism section.
【図1】本発明による投入抵抗付きパッファ形ガス遮断
器の一実施例を示す側面断面図であり、投入状態を示し
ている。FIG. 1 is a side sectional view showing an embodiment of a puffer type gas circuit breaker with closing resistance according to the present invention, showing the closing state.
【図2】本発明による投入抵抗付きパッファ形ガス遮断
器の一実施例を示す側面断面図であり、遮断状態を示し
ている。FIG. 2 is a side cross-sectional view showing one embodiment of the puffer type gas circuit breaker with closing resistance according to the present invention, showing the shut-off state.
【図3】図3は従来の投入抵抗付きパッファ形ガス遮断
器の一実施例を示す側面断面図であり、遮断状態を示し
ている。FIG. 3 is a side sectional view showing an embodiment of a conventional puffer type gas circuit breaker with a closing resistor, showing the shutoff state.
【図4】図4は従来の投入抵抗付きパッファ形ガス遮断
器において、レバーに働く力のモーメントを示す特性図
である。FIG. 4 is a characteristic diagram showing the moment of force acting on the lever in a conventional puffer type gas circuit breaker with closing resistance.
【図5】図5は図1に示した本実施例において、可動側
ガス圧縮室内の圧力変化を示す特性図である。FIG. 5 is a characteristic diagram showing pressure changes in the movable gas compression chamber in the embodiment shown in FIG. 1;
【図6】図6は図1に示した本実施例において、レバー
に働く力のモーメントを示す特性図である。6 is a characteristic diagram showing the moment of force acting on the lever in the embodiment shown in FIG. 1. FIG.
1 主接点用可動側電極2
パッファシリンダ
5 レバー
6 絶縁操作ロッド
7 パッファピストン
10 パッファ室
11 主接点用固定側電極
12 通電導体
14 投入抵抗接点用可動側電極15
投入抵抗接点用固定側電極23 ダン
パ
25 ガス圧縮室
27 可動側シリンダ1 Movable side electrode for main contact 2
Puffer cylinder 5 Lever 6 Insulated operating rod 7 Puffer piston 10 Puffer chamber 11 Fixed electrode for main contact 12 Current-carrying conductor 14 Movable electrode for closing resistance contact 15
Fixed side electrode for closing resistance contact 23 Damper 25 Gas compression chamber 27 Movable side cylinder
Claims (1)
れ、該タンク内に固定される固定側電極と、この固定側
電極に接離自在な可動側電極とから構成される主接点部
が設けられ、前記固定側電極に対して前記可動側電極を
投入動作方向及び遮断動作方向に駆動する絶縁操作ロッ
ドが移動自在に設置されると共に、投入時の過電圧を抑
制する投入抵抗接点部が前記主接点部と電気的に並列に
接続された投入抵抗付きパッファ形ガス遮断器において
、前記投入抵抗接点部は、投入抵抗接点用固定側電極と
、この投入抵抗接点用固定側電極と直列に接続された投
入抵抗体と、投入抵抗接点用固定側電極に接離自在な投
入抵抗接点用可動側電極とから構成され、前記主接点部
の固定側電極に投入抵抗接点部の投入抵抗接点用固定側
電極及び投入抵抗体が設けられ、前記絶縁操作ロッドに
この絶縁操作ロッドの移動方向と直交する方向に延びる
レバーが設けられ、該レバーの先端部に前記投入抵抗接
点部の投入抵抗接点用可動側電極が設けられ、前記投入
抵抗接点用可動側電極の遮断動作方向側に、投入抵抗接
点用可動側電極が当接されるダンパが設けられたことを
特徴とする投入抵抗付きパッファ形ガス遮断器。Claim 1: A main contact section is housed in a tank filled with an insulating gas, and includes a fixed side electrode fixed in the tank, and a movable side electrode that can be freely connected to and separated from the fixed side electrode. An insulated operating rod that drives the movable electrode in the closing operation direction and the disconnection operation direction with respect to the fixed electrode is movably installed, and a closing resistor contact portion that suppresses overvoltage at the time of closing is connected to the main electrode. In a puffer type gas circuit breaker with a closing resistor electrically connected in parallel with a contact portion, the closing resistor contact portion is connected in series with a fixed side electrode for the closing resistor contact and the fixed side electrode for the closing resistor contact. It consists of a closing resistor and a movable electrode for the closing resistance contact that can be freely connected to and separated from the fixed side electrode for the closing resistance contact, and the fixed side for the closing resistance contact of the closing resistance contact section is connected to the fixed side electrode of the main contact section. An electrode and a closing resistor are provided, and the insulated operating rod is provided with a lever extending in a direction perpendicular to the direction of movement of the insulated operating rod, and a movable side for the closing resistor contact of the closing resistor contact portion is provided at the tip of the lever. A puffer type gas circuit breaker with a closing resistor, characterized in that a damper is provided on the breaking operation direction side of the movable electrode for the closing resistor contact, and the movable side electrode for the closing resistor contact comes into contact with the damper. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4513191A JPH04282522A (en) | 1991-03-11 | 1991-03-11 | Buffer type gas breaker with closing resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4513191A JPH04282522A (en) | 1991-03-11 | 1991-03-11 | Buffer type gas breaker with closing resistance |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04282522A true JPH04282522A (en) | 1992-10-07 |
Family
ID=12710721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4513191A Pending JPH04282522A (en) | 1991-03-11 | 1991-03-11 | Buffer type gas breaker with closing resistance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04282522A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113745047A (en) * | 2021-07-01 | 2021-12-03 | 巨东电气有限公司 | Indoor vacuum circuit breaker |
KR20220118674A (en) * | 2021-02-19 | 2022-08-26 | 엘에스일렉트릭(주) | Gas insulation switchgear |
-
1991
- 1991-03-11 JP JP4513191A patent/JPH04282522A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20220118674A (en) * | 2021-02-19 | 2022-08-26 | 엘에스일렉트릭(주) | Gas insulation switchgear |
CN113745047A (en) * | 2021-07-01 | 2021-12-03 | 巨东电气有限公司 | Indoor vacuum circuit breaker |
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