JP2888681B2 - Gas circuit breaker with closing resistance - Google Patents
Gas circuit breaker with closing resistanceInfo
- Publication number
- JP2888681B2 JP2888681B2 JP28309091A JP28309091A JP2888681B2 JP 2888681 B2 JP2888681 B2 JP 2888681B2 JP 28309091 A JP28309091 A JP 28309091A JP 28309091 A JP28309091 A JP 28309091A JP 2888681 B2 JP2888681 B2 JP 2888681B2
- Authority
- JP
- Japan
- Prior art keywords
- closing
- circuit breaker
- lever
- gas circuit
- fixed
- 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.)
- Expired - Lifetime
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Description
【０００１】[0001]
【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ガス遮断器に係
り、特に一点切りの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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas circuit breaker with a closing resistor used in a substation or switchyard of a power system, and more particularly to a puffer type gas circuit breaker with a single-point closing resistor.
【０００２】[0002]
【従来の技術】近年の電力需要の増大により、発変電所
は容量増加の一途をたどっている。また、電力の大量消
費地である都市部では発電所の建設が難しいため、送電
線路は長距離化し、送電効率を高めるために送電系統が
高電圧化している。その結果、送電系統の大容量化が促
進し、変電所や開閉所に用いられる遮断器の遮断容量が
増大化する傾向にある。この様な状況の下、遮断器には
一層の信頼性が求められている。2. Description of the Related Art Due to an increase in power demand in recent years, power substations are steadily increasing in capacity. In urban areas, which consume large amounts of power, it is difficult to construct power plants, so the length of transmission lines is increasing, and the voltage of the transmission system is increased to increase transmission efficiency. As a result, an increase in the capacity of the transmission system is promoted, and the breaking capacity of circuit breakers used in substations and switchyards tends to increase. Under such circumstances, circuit breakers are required to have higher reliability.
【０００３】一般に遮断器の信頼性を高めるためには構
造を簡略化することが有効である。構造の簡略化を図る
場合、遮断点数を減少させることが望ましい。例えば従
来より、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。In general, it is effective to simplify the structure in order to increase the reliability of a circuit breaker. In order to simplify the structure, it is desirable to reduce the number of cutoff points. For example, a two-point puffer-type gas circuit breaker with a breaking current of 50 KA has been put into practical use in the 550 KV system, but it is required to cut it into one point.
【０００４】ところで、５５０ＫＶ級のような大容量系
統における線路用の遮断器に対して１点切り化が実施さ
れる場合、投入時の投入過電圧が信頼性を低下させる原
因として問題となる。そこで、この投入過電圧を抑制す
るために投入抵抗付き遮断器が採用されている。この投
入抵抗付き遮断器は、主接点部を有する消弧室と電気的
に並列に接続された投入抵抗と、投入抵抗と電気的に直
列に接続された投入抵抗接点部とを備えた点を構成上の
特徴としており、遮断器の投入時に主接点部に先だって
投入抵抗接点部が投入される。そのため、投入抵抗によ
り投入過電圧が抑制された状態で主接点部が投入され
る。一方遮断時には、まず投入抵抗接点部が開離され、
次いで主接点部が開極される。[0004] In the case where a single point cut is applied to a circuit breaker for a line in a large capacity system such as a 550 KV class, an overvoltage at the time of closing is a problem as a cause of lowering reliability. Therefore, a breaker with a closing resistor is employed to suppress the closing overvoltage. This circuit breaker with a closing resistor is provided with a closing resistor electrically connected in parallel with an arc-extinguishing chamber having a main contact portion, and a closing resistor contact portion electrically connected in series with the closing resistor. This is a structural feature. When the circuit breaker is closed, the closing resistance contact section is closed prior to the main contact section. Therefore, the main contact portion is closed in a state where the closing overvoltage is suppressed by the closing resistor. On the other hand, at the time of cutoff, the closing resistance contact part is first opened,
Next, the main contact is opened.
【０００５】ここで、投入抵抗付き遮断器の従来例を図
３に示す。ガス遮断器１にはＳＦ6 ガス等の絶縁性ガス
を封入した容器２が設けられ、この容器２内には遮断部
３が収納される。遮断部３は消弧室４及び投入抵抗接点
部５から構成される。消弧室４には主接点部を構成する
固定部６及び可動部７が対向配置して設けられる。FIG. 3 shows a conventional example of a circuit breaker with a closing resistor. The gas circuit breaker 1 is provided with a container 2 in which an insulating gas such as SF 6 gas is sealed. The interrupting section 3 includes an arc-extinguishing chamber 4 and a closing resistance contact section 5. The arc-extinguishing chamber 4 is provided with a fixed portion 6 and a movable portion 7 constituting a main contact portion so as to face each other.
【０００６】このうち、可動部７は通常電流を通電する
可動電極１２、可動アーク電極１３、絶縁ノズル１４、
操作ロッド１５及びパッファシリンダ１６から成る。こ
の可動部７には前記パッファシリンダ１６に嵌合される
パッファピストン２０、可動支え１９、シールド１８及
び支持絶縁筒１７が、ガス遮断器１の軸方向に沿って順
次取付けられ、これらの部材により可動部７が容器２に
支持される。また、可動部７は操作ロッド１５の駆動に
より投入方向及び遮断方向に動く。The movable part 7 includes a movable electrode 12 for supplying a normal current, a movable arc electrode 13, an insulating nozzle 14,
It comprises an operating rod 15 and a puffer cylinder 16. A puffer piston 20, a movable support 19, a shield 18, and a supporting insulating cylinder 17 fitted to the puffer cylinder 16 are sequentially attached to the movable portion 7 along the axial direction of the gas circuit breaker 1. The movable part 7 is supported by the container 2. Further, the movable section 7 is moved in the closing direction and the closing direction by driving the operation rod 15.
【０００７】一方、固定部６は通常電流を通電する固定
フィンガ８、固定アーク電極９、固定側のシールド１０
及びこれらを支える固定支え１１から成る。この固定部
６にはガス遮断器１の軸方向に沿って絶縁棒２１が取付
けられ、この絶縁棒２１が前記固定支え１９に固定され
ることにより、固定部６が容器２に支持される。On the other hand, the fixed part 6 is composed of a fixed finger 8, a fixed arc electrode 9, and a shield 10 on the fixed side for supplying a normal current.
And a fixed support 11 for supporting them. An insulating rod 21 is attached to the fixing part 6 along the axial direction of the gas circuit breaker 1, and the fixing part 6 is supported by the container 2 by fixing the insulating rod 21 to the fixing support 19.
【０００８】また、前記操作ロッド１５にはＴ字形のレ
バー２８及び絶縁操作ロッド２９がガス遮断器１の軸方
向に沿って取付けられ、これらの部材を介して操作ロッ
ド１５は操作箱３０の中に装着された操作機構（図示せ
ず）に連結される。なお、操作機構は絶縁操作ロッド２
９、レバー２８及び操作ロッド１５を投入方向及び遮断
方向に駆動するものである。A T-shaped lever 28 and an insulated operating rod 29 are attached to the operating rod 15 along the axial direction of the gas circuit breaker 1. Connected to an operation mechanism (not shown) mounted on the camera. The operating mechanism is an insulating operating rod 2
9, for driving the lever 28 and the operating rod 15 in the closing direction and the closing direction.
【０００９】投入抵抗接点部５には投入抵抗固定部２２
及び投入接点可動電極２３が対向配置して構成される。
可動電極２３は前記レバー２８の下端部に固定される。
また、可動電極２３はレバー２８の駆動により投入方向
及び遮断方向に動く。一方、投入接点固定部２２は絶縁
部材２４を介して固定支え１１に固定される。また、投
入接点固定部２２には電気的に直列に投入抵抗２７が接
続される。この投入抵抗２７は前記固定支え１１に取付
けられる。The closing resistance contact section 5 includes a closing resistance fixing section 22.
And the closing contact movable electrode 23 are arranged to face each other.
The movable electrode 23 is fixed to the lower end of the lever 28.
The movable electrode 23 moves in the closing direction and the closing direction by driving the lever 28. On the other hand, the closing contact fixing portion 22 is fixed to the fixing support 11 via the insulating member 24. A closing resistor 27 is electrically connected to the closing contact fixing section 22 in series. This closing resistor 27 is attached to the fixed support 11.
【００１０】更に投入接点固定部２２には、ばね２６を
介して投入接点の固定電極２５が移動可能に支持され
る。遮断状態において固定電極２５と可動電極２３とは
開離されるが、ばね２６の弾性力により固定電極２５は
可動電極２３側に変位される。また投入時においては固
定電極２５は可動電極２３に押圧され、ばね２６は固定
電極２５側に圧縮される。圧縮されたばね２６が元の状
態に戻る際の復元速度は可動電極２３の移動速度の方よ
り遅く設定される。なお、遮断時における消弧室４及び
投入抵抗接点部５の各電極のワイプは、消弧室４の方が
投入抵抗接点部５のそれよりも大きくなるように選定さ
れる。Further, a fixed electrode 25 of a closing contact is movably supported by a closing contact fixing portion 22 via a spring 26. In the cutoff state, the fixed electrode 25 and the movable electrode 23 are separated, but the fixed electrode 25 is displaced toward the movable electrode 23 by the elastic force of the spring 26. At the time of injection, the fixed electrode 25 is pressed by the movable electrode 23, and the spring 26 is compressed toward the fixed electrode 25. The restoration speed when the compressed spring 26 returns to the original state is set lower than the moving speed of the movable electrode 23. The wipe of each electrode of the arc-extinguishing chamber 4 and the closing resistance contact section 5 at the time of interruption is selected so that the arc-extinguishing chamber 4 is larger than that of the closing resistance contact section 5.
【００１１】以上のような構成を有するガス遮断器１の
投入時には操作機構により操作ロッド１５及びレバー２
８が投入方向に駆動する。これにより可動部７及び可動
電極２３が投入方向に動く。その際、まず可動電極２３
が固定電極２５に接触して投入抵抗接点部５が投入状態
となり、投入抵抗２７に電流が流れ、投入過電圧を抑制
する。その後、可動部７の可動電極１２が固定部６の固
定フィンガ８に投入されて主接点部である消弧室４が投
入状態となる。When the gas circuit breaker 1 having the above configuration is turned on, the operating rod 15 and the lever 2 are operated by the operating mechanism.
8 is driven in the closing direction. Thereby, the movable part 7 and the movable electrode 23 move in the closing direction. At that time, first, the movable electrode 23
Is in contact with the fixed electrode 25, and the closing resistance contact portion 5 is turned on, a current flows through the closing resistor 27, and the closing overvoltage is suppressed. Thereafter, the movable electrode 12 of the movable portion 7 is put into the fixed finger 8 of the fixed portion 6, and the arc-extinguishing chamber 4, which is the main contact portion, is turned on.
【００１２】一方、ガス遮断器１の遮断時には操作機構
により操作ロッド１５及びレバー２８が遮断方向に駆動
すると、可動部７及び可動電極２３が遮断方向に動く。
その際、消弧室４側の電極のワイプの方が投入抵抗接点
部５側のそれよりも大きく、且つばね２６の復元速度よ
りも投入接点可動電極２３の移動速度の方が速い。その
ため可動電極２３が可動部７と同速度で動かされても、
まず投入抵抗接点部５が開離され、次いで主接点部であ
る消弧室４が開極される。On the other hand, when the operation rod 15 and the lever 28 are driven in the shut-off direction by the operating mechanism when the gas circuit breaker 1 is shut off, the movable part 7 and the movable electrode 23 move in the shut-off direction.
At that time, the wipe of the electrode on the arc extinguishing chamber 4 side is larger than that on the closing resistance contact portion 5 side, and the moving speed of the closing contact movable electrode 23 is faster than the restoring speed of the spring 26. Therefore, even if the movable electrode 23 is moved at the same speed as the movable portion 7,
First, the closing resistance contact portion 5 is opened, and then the arc-extinguishing chamber 4 as the main contact portion is opened.
【００１３】ところで上記の様なガス遮断器１におい
て、要求される。そのため図３に示した従来例には、パ
ッファピストン２０及び可動支え１９にそれぞれ操作ロ
ッド１５及びレバー２８に当接可能な摺動部材３１，３
２が設けられる。この摺動部材３１，３２を設けること
によって、可動部７及び可動電極２３の動きが直線的と
なり、可動部７及び可動電極２３が直線方向と交差する
半径方向にぶれることがない。Incidentally, in the gas circuit breaker 1 as described above, it is required. For this reason, in the conventional example shown in FIG. 3, sliding members 31 and 3 which can abut on the operation rod 15 and the lever 28 respectively on the puffer piston 20 and the movable support 19 are provided.
2 are provided. By providing the sliding members 31 and 32, the movement of the movable portion 7 and the movable electrode 23 becomes linear, and the movable portion 7 and the movable electrode 23 do not move in the radial direction intersecting the linear direction.
【００１４】[0014]
【発明が解決しようとする課題】しかし、前記摺動部材
３２を設けるため可動支え１９はガス遮断器１の軸方向
に長くなる。これに伴いレバー２８もまたガス遮断器１
の軸方向に長くしなくてはならない。これは、絶縁性能
を維持するためにレバー２８と絶縁操作ロッド２９との
接続部分が遮断時でもシールド１８から操作箱３０側に
突出しないようにするためである。そこで、可動支え１
９及びレバー２８に伴ってガス遮断器１自体も軸方向に
長くならざるを得なかった。また、軸方向に延びた分だ
けレバー２８の重量も増えるため、これを駆動させる操
作機構の大形化を招いた。However, since the sliding member 32 is provided, the movable support 19 becomes longer in the axial direction of the gas circuit breaker 1. Accordingly, the lever 28 is also connected to the gas circuit breaker 1.
Must be longer in the axial direction. This is to prevent the connection between the lever 28 and the insulating operation rod 29 from protruding from the shield 18 toward the operation box 30 even when the connection is interrupted in order to maintain the insulation performance. Therefore, movable support 1
9 and the lever 28, the gas circuit breaker 1 itself had to be elongated in the axial direction. Further, since the weight of the lever 28 is increased by an amount corresponding to the extension in the axial direction, the operating mechanism for driving the lever 28 is increased in size.
【００１５】この様なガス遮断器１の軸方向への長大化
及び操作機構の大形化を防止するために、摺動部材３２
を省略することが考えられる。しかしながらこの場合、
次のような問題点が指摘されている。この問題点を図４
（ａ），（ｂ）を参照して説明する。同図は摺動部材３
２が省略されたレバー３３の動作を示しており、（ａ）
は遮断動作中，（ｂ）は遮断動作完了時を示している。In order to prevent the gas circuit breaker 1 from being lengthened in the axial direction and the operation mechanism from being enlarged, the sliding member 32 is required.
May be omitted. However, in this case,
The following problems have been pointed out. This problem is illustrated in FIG.
This will be described with reference to (a) and (b). The figure shows the sliding member 3
2 shows the operation of the lever 33 in which 2 is omitted, and (a)
Indicates the interruption operation, and (b) indicates the completion of the interruption operation.
【００１６】図４（ａ）に示すように遮断動作中では、
機構箱３０内に装着された操作機構３４が動作し、絶縁
操作ロッド２９、レバー３３、操作ロッド１５は図中矢
印Ａ方向に駆動する。また、レバー３３に接続された可
動電極２３は図中矢印Ｂ方向に動く。そして図４（ｂ）
に示すように遮断動作が完了する時、操作機構３４は停
止し、絶縁操作ロッド２９、レバー３３、操作ロッド１
５及び可動電極２３には動いていた方向に慣性力が発生
する。ところで、操作機構３４内にはダンパ３４ａが設
けられている。このダンバ３４ａが絶縁操作ロッド２
９、レバー３３及び操作ロッド１５に発生した慣性力を
吸収する。しかし、可動電極２３にはダンパ３４の吸収
力が及ばないため、その慣性力は残存する。その際、レ
バー３３は既に停止しているため、この慣性力は図中矢
印Ｃ方向へと向うモーメントとして働き、このモーメン
トは図中矢印Ｄ方向へ向う力となる。更に図中矢印Ｄ方
向への力によりレバー３３が変位し、この変位が摺動部
材３１を支点とするモーメントとして働く。その結果、
摺動部材３１付近や操作ロッド１５とレバー３３との接
続部分近辺には過大な曲げ応力が発生する。従って、投
入動作及び遮断動作の繰返しにより操作ロッド１５やレ
バー３３が破断する恐れがあり、ガス遮断器の信頼性が
低下した。[0016] As shown in FIG.
The operation mechanism 34 mounted in the mechanism box 30 operates, and the insulating operation rod 29, the lever 33, and the operation rod 15 are driven in the direction of arrow A in the figure. The movable electrode 23 connected to the lever 33 moves in the direction of arrow B in the figure. And FIG. 4 (b)
When the shut-off operation is completed as shown in FIG. 7, the operation mechanism 34 stops, and the insulating operation rod 29, the lever 33,
5 and the movable electrode 23 generate an inertial force in the moving direction. By the way, a damper 34 a is provided in the operation mechanism 34. The damper 34a is connected to the insulating operating rod 2
9. Absorb the inertial force generated in the lever 33 and the operating rod 15. However, since the absorbing power of the damper 34 does not reach the movable electrode 23, its inertia force remains. At this time, since the lever 33 has already stopped, this inertial force acts as a moment in the direction of arrow C in the figure, and this moment becomes a force in the direction of arrow D in the figure. Further, the lever 33 is displaced by a force in the direction of arrow D in the figure, and this displacement acts as a moment about the sliding member 31 as a fulcrum. as a result,
Excessive bending stress is generated near the sliding member 31 and near the connection between the operating rod 15 and the lever 33. Therefore, there is a possibility that the operating rod 15 and the lever 33 may be broken by the repetition of the closing operation and the closing operation, and the reliability of the gas circuit breaker is reduced.
【００１７】本発明は以上のような従来技術の有する問
題点を解消するために提案されたものであり、その目的
とするところは、ガス遮断器の軸方向の寸法を最小にし
てコンパクト化が進み経済性が向上すると共に、操作ロ
ッドやレバーに発生する曲げ応力が低減して優れた信頼
性を確保できる投入抵抗付きガス遮断器を提供すること
にある。The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to reduce the size of the gas circuit breaker in the axial direction to minimize the size. It is an object of the present invention to provide a gas circuit breaker with a closing resistance capable of improving the economical efficiency and reducing bending stress generated in an operation rod or a lever to ensure excellent reliability.
【００１８】[0018]
【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ガス遮断器は、消弧室にはガ
ス遮断器の軸方向に沿って摺動案内ロッドが固定され、
消弧室の可動部を駆動する操作ロッドと投入抵抗接点部
の可動電極とを連結するレバーには摺動案内ロッドが挿
通する孔が形成され、更に孔内面にはレバーが摺動案内
ロッドに沿って動作するように摺動リングが固着された
ことを特徴とする。In order to achieve the above object, a gas circuit breaker with a closing resistor according to the present invention has a sliding guide rod fixed to an arc-extinguishing chamber along an axial direction of the gas circuit breaker.
The lever that connects the operating rod that drives the movable part of the arc-extinguishing chamber and the movable electrode of the closing resistance contact part has a hole through which a sliding guide rod is inserted. The sliding ring is fixed so as to operate along.
【００１９】[0019]
【作用】以上のような構成を有する本発明の投入時及び
遮断時において、孔内の摺動リングに摺動案内ロッドが
摺動することにより、レバーは遮断器の軸方向に沿って
確実に摺動する。従って、消弧室の可動部及び投入抵抗
接点部の可動電極は半径方向にぶれず、直線的に効率良
く動くことができる。When the present invention having the above-described configuration is closed and closed, the sliding guide rod slides on the sliding ring in the hole, so that the lever can be reliably moved along the axial direction of the circuit breaker. Slide. Therefore, the movable portion of the arc-extinguishing chamber and the movable electrode of the closing resistance contact portion can move linearly and efficiently without being displaced in the radial direction.
【００２０】また、遮断動作完了時にレバーが停止した
際、摺動リングに摺動案内ロッドが挿通されているた
め、投入抵抗接点部の可動電極に慣性力が残存しても、
この慣性力によるレバーの曲げ変位を抑えることができ
る。そのため、操作ロッド及びレバー等において過大な
曲げ応力が発生しない。従って、投入動作及び遮断動作
が繰返されても操作ロッド及びレバー等が破断すること
がない。Further, when the lever is stopped when the shut-off operation is completed, since the sliding guide rod is inserted through the sliding ring, even if inertial force remains in the movable electrode of the closing resistance contact portion,
The bending displacement of the lever due to the inertial force can be suppressed. Therefore, excessive bending stress does not occur in the operation rod, the lever, and the like. Therefore, even if the closing operation and the closing operation are repeated, the operation rod, the lever, and the like do not break.
【００２１】更に、レバーに当接する摺動部材を設ける
必要がないため、ガス遮断器の軸方向の寸法を最小にす
ることができる。しかも、レバーを短くすることにより
重量を軽減化することができるため、操作機構を小さく
することが可能となる。Further, since there is no need to provide a sliding member that contacts the lever, the axial size of the gas circuit breaker can be minimized. In addition, since the weight can be reduced by shortening the lever, the operation mechanism can be reduced.
【００２２】[0022]
【実施例】以下、本発明による投入抵抗付きガス遮断器
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。図１は本実施例の断面図であり、図２は図１のII−
II線断面図である。なお、図１中、図３と同一の部材に
関しては同一符号を付し、説明は省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a gas circuit breaker with a closing resistor according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a cross-sectional view of the present embodiment, and FIG.
FIG. 2 is a sectional view taken along line II. In FIG. 1, the same members as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
【００２３】ガス遮断器４０において、消弧室４の固定
支え１９には前記摺動部材３２は設けられておらず、固
定支え１９の下部にガス遮断器４０の軸方向に沿って摺
動案内ロッド４５が固定されている。また、操作ロッド
１５にはレバー４１を介して絶縁操作ロッド２９が連結
される。In the gas circuit breaker 40, the sliding member 32 is not provided on the fixed support 19 of the arc-extinguishing chamber 4, and a sliding guide is provided below the fixed support 19 along the axial direction of the gas circuit breaker 40. The rod 45 is fixed. The operation rod 15 is connected to an insulating operation rod 29 via a lever 41.
【００２４】図２に示すように、レバー４１は絶縁操作
ロッド２９に対してピン４２が挿通され、ピン４２の両
端にスナップリング４３が固定されることによって結合
されている。ところで、レバー４１は水平な辺部と垂直
な辺部とを有する略Ｌ字形の部材であり、垂直な辺部に
は孔４６が形成される。この孔４６内には摺動リング４
４が固着されており、ここに前記摺動案内ロッド４５が
摺動自在に挿通される。摺動リング４４は四弗化エチレ
ン樹脂等から形成されており、内面に摺動案内ロッド４
５が接触して軸方向に沿って摺動されるようになってい
る。As shown in FIG. 2, the lever 41 is connected by inserting a pin 42 into the insulating operation rod 29 and fixing snap rings 43 to both ends of the pin 42. The lever 41 is a substantially L-shaped member having a horizontal side and a vertical side, and a hole 46 is formed in the vertical side. The sliding ring 4 is provided in the hole 46.
4 is fixed, and the slide guide rod 45 is slidably inserted therein. The sliding ring 44 is formed of tetrafluoroethylene resin or the like, and has a sliding guide rod 4 on its inner surface.
5 come into contact with each other and slide along the axial direction.
【００２５】以上のような構成を有する本実施例のガス
遮断器４０の投入時及び遮断時において、孔４６内の摺
動リング４４に摺動案内ロッド４５が摺動することによ
り、レバー４１は遮断器４０の軸方向に沿って確実に摺
動する。従って、可動部７及び可動電極２３は半径方向
にぶれることなく、効率良く直線的に動くことができ
る。その際、摺動リング４４は孔４６側に固着されてい
るため、摺動案内ロッド４５が摺動しても孔４６から外
れることがない。When the gas circuit breaker 40 of the present embodiment having the above-described configuration is turned on and off, the slide guide rod 45 slides on the slide ring 44 in the hole 46 so that the lever 41 is moved. It slides reliably along the axial direction of the circuit breaker 40. Therefore, the movable portion 7 and the movable electrode 23 can move efficiently and linearly without being shaken in the radial direction. At this time, since the slide ring 44 is fixed to the hole 46 side, even if the slide guide rod 45 slides, it does not come off from the hole 46.
【００２６】また遮断動作完了した時点でレバー４１が
停止する場合、可動電極２３に発生した慣性力がダンパ
等により吸収されずに残存するが、摺動リング４４に摺
動案内ロッド４５が挿通されているため、慣性力による
レバー４１の曲げ変位を抑えることができる。従って、
操作ロッド１５及びレバー４１に過大な曲げ応力が発生
しない。そのため、投入動作及び遮断動作を繰返しても
操作ロッド１５やレバー４１が破断する心配がなく、優
れた信頼性を確保できる。When the lever 41 stops at the time when the shut-off operation is completed, the inertial force generated in the movable electrode 23 remains without being absorbed by the damper or the like, but the sliding guide rod 45 is inserted through the sliding ring 44. Therefore, the bending displacement of the lever 41 due to the inertial force can be suppressed. Therefore,
Excessive bending stress does not occur in the operation rod 15 and the lever 41. Therefore, even if the closing operation and the closing operation are repeated, there is no fear that the operating rod 15 or the lever 41 is broken, and excellent reliability can be secured.
【００２７】更に、レバー４１に当接する摺動部材３２
を設ける必要がないため、レバー４１の軸方向の寸法を
短縮できる。そのため、ガス遮断器４０の軸方向の寸法
を最小にすることが可能となる。しかも、レバー４１の
軸方向の寸法を短くすることにより重量を軽減化できる
ため、操作機構を小さくすることが可能となる。その結
果、ガス遮断器４０のコンパクト化が進み、且つ経済性
が向上した。Further, the sliding member 32 abutting on the lever 41
Is not required, so that the axial dimension of the lever 41 can be reduced. Therefore, the axial dimension of the gas circuit breaker 40 can be minimized. Moreover, since the weight can be reduced by shortening the axial dimension of the lever 41, the operation mechanism can be reduced in size. As a result, the size of the gas circuit breaker 40 has been reduced, and the economy has been improved.
【００２８】[0028]
【発明の効果】以上述べたように、本発明の投入抵抗付
きガス遮断器によれば、消弧室と投入抵抗接点部とを連
結するレバーに形成された孔内の摺動リングに、消弧室
に固定された摺動案内ロッドが摺動されるという構成を
とることにより、投入時及び遮断時には消弧室の可動部
及び投入抵抗接点部の可動電極が直線的に効率良く動く
ことができ、且つ遮断動作完了時には投入抵抗接点部の
可動電極に発生する慣性力を抑えてレバー等の破断を防
止できるため、優れた信頼性を確保することができ、更
にガス遮断器の軸方向の寸法の短縮化及び操作機構の小
形化によりコンパクト化が進み、経済性が向上した。As described above, according to the gas circuit breaker with the closing resistance of the present invention, the sliding ring in the hole formed in the lever connecting the arc-extinguishing chamber and the closing resistance contact portion is provided. By adopting a configuration in which the sliding guide rod fixed to the arc chamber is slid, the movable section of the arc extinction chamber and the movable electrode of the closing resistance contact section can move linearly and efficiently during closing and closing. When the shutoff operation is completed, the inertia force generated in the movable electrode of the closing resistance contact portion can be suppressed to prevent breakage of the lever and the like, so that excellent reliability can be ensured. The reduction in size and downsizing of the operating mechanism have led to a more compact design and improved economics.
【図１】本発明の一実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】図１のII−II線断面図。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】従来の投入抵抗付き遮断器の一例の断面図。FIG. 3 is a cross-sectional view of an example of a conventional circuit breaker with a closing resistor.
【図４】従来の投入抵抗付き遮断器が持つ問題点を説明
する説明図であり、（ａ）は遮断動作中，（ｂ）は遮断
動作完了時を示す。FIGS. 4A and 4B are explanatory diagrams for explaining a problem of a conventional circuit breaker with a closing resistor, wherein FIG. 4A shows a state during a breaking operation and FIG.
２ 容器 ３ 遮断部 ４ 消弧室 ５ 投入抵抗接点部 ６ 固定部 ７ 可動部 １２ 可動電極 １５ 操作ロッド ２２ 投入接点固定部 ２３ 投入接点可動電極 ２５ 投入接点固定電極 ２７ 投入抵抗 ４０ ガス遮断器 ４１ レバー ４４ 摺動リング ４５ 摺動案内ロッド ４６ 孔 2 Container 3 Breaking part 4 Arc extinguishing chamber 5 Making resistance contact part 6 Fixed part 7 Moving part 12 Moving electrode 15 Operating rod 22 Making contact fixing part 23 Making contact movable electrode 25 Making contact fixed electrode 27 Making resistance 40 Gas circuit breaker 41 Lever 44 sliding ring 45 sliding guide rod 46 hole
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01H 33/91 H01H 33/70 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. 6 , DB name) H01H 33/91 H01H 33/70
Claims (1)
が収納され、該消弧室には固定部及び該固定部に接離可
能な可動部が設けられ、前記可動部には可動部を投入方
向及び遮断方向に動かす操作ロッドが取付けられ、該操
作ロッドには操作ロッドを駆動する操作機構が連結さ
れ、更に前記消弧室には投入時の過電圧を抑制する投入
抵抗が電気的に並列に接続され、該投入抵抗には投入抵
抗接点部が電気的に直列に接続され、該投入抵抗接点部
には固定電極及び該固定電極に接離可能な可動電極が設
けられ、前記操作ロッド及び前記可動電極には両者を連
結するレバーが取付けられた投入抵抗付きガス遮断器に
おいて、 前記ガス遮断器の軸方向に沿って前記消弧室に摺動案内
ロッドが固定され、 前記摺動案内ロッドが貫通するように前記レバーに孔が
形成され、 前記レバーが前記摺動案内ロッドに沿って動作するよう
に前記孔内面に摺動リングが固着されている、ことを特
徴とする投入抵抗付きガス遮断器。An arc-extinguishing chamber is housed in a container filled with an insulating gas, and the arc-extinguishing chamber is provided with a fixed portion and a movable portion that can be moved toward and away from the fixed portion. An operation rod for moving the movable portion in the closing direction and the closing direction is attached, an operating mechanism for driving the operating rod is connected to the operating rod, and a closing resistor for suppressing an overvoltage at closing is electrically connected to the arc-extinguishing chamber. The closing resistor is electrically connected in series to the closing resistor, and the closing resistor contact is provided with a fixed electrode and a movable electrode that can be separated from and connected to the fixed electrode. In a gas circuit breaker with a closing resistance, wherein a lever for connecting the operation rod and the movable electrode to each other is attached, a sliding guide rod is fixed to the arc-extinguishing chamber along an axial direction of the gas circuit breaker, Move the lever so that the motion guide rod The hole is formed, the lever sliding ring is fixed to the hole inner surface so as to operate along the sliding guide rods, closing resistor with a gas circuit breaker, characterized in that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28309091A JP2888681B2 (en) | 1991-10-29 | 1991-10-29 | Gas circuit breaker with closing resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28309091A JP2888681B2 (en) | 1991-10-29 | 1991-10-29 | Gas circuit breaker with closing resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05120968A JPH05120968A (en) | 1993-05-18 |
| JP2888681B2 true JP2888681B2 (en) | 1999-05-10 |
Family
ID=17661090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28309091A Expired - Lifetime JP2888681B2 (en) | 1991-10-29 | 1991-10-29 | Gas circuit breaker with closing resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2888681B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2763422B1 (en) * | 1997-05-15 | 1999-07-09 | Gec Alsthom T & D Sa | GENERATOR CIRCUIT BREAKER |
| KR102315117B1 (en) * | 2015-06-01 | 2021-10-20 | 엘에스일렉트릭 (주) | Supporting Structure of Closing Resistor of Gas Insulated Switchgear |
-
1991
- 1991-10-29 JP JP28309091A patent/JP2888681B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05120968A (en) | 1993-05-18 |
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