JPH03257731A - Tank type gas-blast circuit-breaker with closing resistor - Google Patents

Tank type gas-blast circuit-breaker with closing resistor

Info

Publication number
JPH03257731A
JPH03257731A JP5266090A JP5266090A JPH03257731A JP H03257731 A JPH03257731 A JP H03257731A JP 5266090 A JP5266090 A JP 5266090A JP 5266090 A JP5266090 A JP 5266090A JP H03257731 A JPH03257731 A JP H03257731A
Authority
JP
Japan
Prior art keywords
closing
circuit breaker
resistor
resistors
support insulator
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
JP5266090A
Other languages
Japanese (ja)
Inventor
Yasushi Kijima
木嶋 靖
Tetsuya Nakamoto
哲哉 中本
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP5266090A priority Critical patent/JPH03257731A/en
Publication of JPH03257731A publication Critical patent/JPH03257731A/en
Pending legal-status Critical Current

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  • Circuit Breakers (AREA)

Abstract

PURPOSE:To enhance the reliability of a support insulator supporting resistors, and thereby prevent the occurrence of failures due to grounding just after interruption by supporting one end of each resistor with the support insulator connected onto a connecting conductor which is connected to the other equipment. CONSTITUTION:In the stationary side of a circuit breaker, a support insulator 20 is fixed onto a connecting conductor 12 by which the breaker is connected to the other equipment, within the circuit breaker, and the stationary end sections of resistors 3b and 3c are supported by the support insulator 20 via the connecting conductor 3d of both of the resistors. Current is applied to the resistors 3b and 3c only for about 10ns from the functional point of view. No current does flow therefore into each resistor for the time other than the aforesaid time for making current, neither potential difference is built up between the connecting conductors 12 and 3d nor voltage is applied to the support insulator 20. By this constitution, insulating properties just after interruption are lowered less, and the insulating cylinder 20 supporting the resistors 3b and 3c is prevented from being stressed by voltage at all times.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は、開閉時に発生する過電圧を抑制する投入抵抗
付タンク形ガス遮断器に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a tank-type gas circuit breaker with closing resistance that suppresses overvoltage generated during opening and closing.

(従来の技術) 我国においては、550kV系統のような高電圧系統に
使用される遮断器においては、投入時には、投入抵抗を
挿入して回路に発生する開閉サージを抑制するのが一般
的である。これは、遮断器の主接点と並列に投入抵抗と
繋がる投入接点を設け、投入時には主接点に先行して投
入接点が投入され、その投入抵抗により投入過電圧が抑
制された状態で主接点が投入されるものである。
(Prior art) In Japan, in circuit breakers used in high-voltage systems such as 550kV systems, it is common to insert a closing resistor to suppress switching surges that occur in the circuit when the circuit is closed. . In this system, a closing contact connected to a closing resistor is installed in parallel with the main contact of the circuit breaker, and when the circuit breaker is closed, the closing contact is closed before the main contact, and the main contact is closed while the closing overvoltage is suppressed by the closing resistance. It is something that will be done.

一般に、この様な投入抵抗骨の遮断器において、同一定
格電圧では最適な投入抵抗の抵抗値はほぼ同じ値であり
、従って、投入時に抵抗体が処理すべき熱容量もほぼ同
一となる。そして、使用される抵抗体の大きさは、抵抗
体の材料が処理できる熱容量と材料の耐電圧値により決
まる。
Generally, in such a circuit breaker having a closing resistance, the optimum resistance value of the closing resistor is approximately the same value at the same rated voltage, and therefore the heat capacity that the resistor must handle at the time of closing is also approximately the same. The size of the resistor used is determined by the heat capacity that the material of the resistor can handle and the withstand voltage value of the material.

ところで、近年の遮断性能の向上により、遮断点数の低
減により遮断器は1点切り化へと進みつつあるため、同
様に投入抵抗接点も1点化されつつある。しかしながら
、上記理由により投入抵抗の大きさがなかなか小さくな
らないため、投入抵抗が投入接点等に比べ相対的に大き
いものとなり、この投入抵抗をどのように支持するかが
問題となる。これを解決するために、例えば特開昭64
−89127公報に記載の発明などが、従来技術として
提案されている。
By the way, with the recent improvement in breaking performance, the number of breaking points has been reduced, and circuit breakers are now becoming one-point breaking, and accordingly, the number of closing resistance contacts is also being reduced to one point. However, due to the above-mentioned reasons, the magnitude of the closing resistance is not easily reduced, so that the closing resistance is relatively large compared to the closing contact, etc., and the problem is how to support this closing resistance. In order to solve this problem, for example,
The invention described in Publication No.-89127 has been proposed as a prior art.

第2図はこの様な従来技術の一例を示すもので、横形遮
断器について投入抵抗の支持構造を改良したものである
。この従来技術において、遮断器のガスタンク1内に消
弧室2と並列に抵抗接点部3が並列に接続されており、
前記消弧室2と抵抗接点部3の可動側の端部(図中右側
の端部)は、可動支持部材4を介して絶縁筒5によりガ
スタンク1に支持されている。そして、ガスタンク1の
こちら側の端部には機構箱6が取付けられ、その内部に
駆動部が収納されている。
FIG. 2 shows an example of such a conventional technique, in which the supporting structure of the closing resistor of a horizontal circuit breaker is improved. In this prior art, a resistance contact part 3 is connected in parallel with an arc extinguishing chamber 2 in a gas tank 1 of a circuit breaker,
The movable ends of the arc extinguishing chamber 2 and the resistance contact portion 3 (right end in the figure) are supported by the gas tank 1 by an insulating tube 5 via a movable support member 4. A mechanism box 6 is attached to this end of the gas tank 1, and a drive section is housed inside the mechanism box 6.

消弧室2は、機構箱6内にある図示していない駆動部に
より駆動される絶縁ロッド7によって支持された可動電
極2a、これに固着されたバッファシリンダ2b及び絶
縁ノズル2 c sバッファシリンダ2bと摺動自在で
かつ消弧室に固定されたバッファピストン2dより成る
可動部と、前記可動電極に対向して配置された固定電極
2eを有する固定部と、これら可動部と固定部の外周に
設けられた絶縁筒2fとから構成されている。
The arc extinguishing chamber 2 includes a movable electrode 2a supported by an insulating rod 7 driven by a drive unit (not shown) in a mechanism box 6, a buffer cylinder 2b fixed to the movable electrode 2a, and an insulating nozzle 2cs buffer cylinder 2b. a movable part consisting of a buffer piston 2d which is slidable and fixed to the arc extinguishing chamber; a fixed part having a fixed electrode 2e disposed opposite to the movable electrode; It is composed of an insulating cylinder 2f provided.

抵抗接点部3は、接続導体3aにより消弧室2の固定部
側に電気的に接続された投入抵抗3b。
The resistance contact portion 3 is a closing resistor 3b electrically connected to the fixed portion side of the arc extinguishing chamber 2 via a connecting conductor 3a.

3c、この投入抵抗3b、3cを直列に接続する接続導
体3d、この投入抵抗3a、3cと直列に接続された固
定側投入接点3e及び可動側投入抵抗接点3f、可動側
投入接点3fを可動側支持部材4に接続固定する支持導
体3gより構成されている。また、投入抵抗3b、3c
は、両者の接続導体3d部分に設けた絶縁筒8により、
ガスタンク1の底部に支持されている。
3c, a connecting conductor 3d connecting the making resistors 3b and 3c in series, a fixed side closing contact 3e and a movable side closing contact 3f connected in series with the closing resistors 3a and 3c, and a movable side closing contact 3f connected to the movable side. It is composed of a support conductor 3g that is connected and fixed to the support member 4. In addition, the closing resistances 3b and 3c
Due to the insulating tube 8 provided at the 3d portion of the connecting conductor,
It is supported at the bottom of the gas tank 1.

そして、他の機器へは消弧室可動側からは接続導体10
を介して接続され、固定側は接続部11、接続導体12
、接続子13及びこれらを支持する絶縁スペーサ14を
介して、他の機器へと接続されている。
A connecting conductor 10 is connected to other equipment from the movable side of the arc extinguishing chamber.
The fixed side has a connecting part 11 and a connecting conductor 12.
, a connector 13 and an insulating spacer 14 that supports these, and is connected to other equipment.

(発明が解決しようとする課題) しかし、この様な構成を有する従来技術においては、投
入抵抗3b、3cが絶縁筒8を介してガスタンク1に支
持されているので、遮断器の投入時あるいは開極時でも
、遮断器の固定側に電圧が印加されている時には、常時
絶縁筒8に電気的なストレスが加わっている。
(Problem to be Solved by the Invention) However, in the prior art having such a configuration, since the closing resistors 3b and 3c are supported by the gas tank 1 via the insulating cylinder 8, when the circuit breaker is closed or opened, Even in extreme conditions, when voltage is applied to the fixed side of the circuit breaker, electrical stress is constantly applied to the insulating tube 8.

また、この種のバッファ形ガス遮断器は、電流遮断時に
おいて、可動電極2aと固定電極2eの間に発生したア
ークに対してバッファシリンダ2bにより圧縮されたガ
スを絶縁ノズル2Cによって導いて吹付けることにより
、このアークを消弧するため、アークによって熱せられ
た大量の熱ガスが発生する。この熱ガスは、第2図にお
いて、図中の矢印の方へ向かうが、固定側に絶縁筒8が
あると、この熱ガスにより絶縁筒8近傍のガスの絶縁性
能が低下し、ガスギャップよりも絶縁性能の弱い絶縁筒
8の沿面方向の絶縁性能が低下する恐れがあり、遮断直
後に内絡する可能性がある。
In addition, this type of buffer type gas circuit breaker blows gas compressed by a buffer cylinder 2b, guided by an insulating nozzle 2C, against an arc generated between a movable electrode 2a and a fixed electrode 2e when interrupting current. As a result, a large amount of hot gas heated by the arc is generated in order to extinguish the arc. This hot gas moves in the direction of the arrow in Fig. 2, but if the insulating cylinder 8 is on the fixed side, this hot gas will reduce the insulation performance of the gas near the insulating cylinder 8, and the gas gap will decrease. However, there is a risk that the insulation performance in the creeping direction of the insulating tube 8, which has a weak insulation performance, will deteriorate, and there is a possibility that an internal circuit will occur immediately after the interruption.

本発明は、上記の様な従来技術の問題点を解決するため
に提案されたもので、その目的は、遮断直後の絶縁性能
の低下が少なく、且つ、投入抵抗を支持する絶縁筒に常
時電圧ストレスがかかることのない信頼性の高い投入抵
抗骨タンク形ガス遮断器を提供することにある。
The present invention was proposed in order to solve the problems of the prior art as described above, and its purpose is to minimize the deterioration of insulation performance immediately after disconnection, and to maintain constant voltage on the insulating tube supporting the closing resistor. To provide a highly reliable closing resistance bone tank type gas circuit breaker that is not subjected to stress.

[発明の構成] (課題を解決するための手段) 上記の目的を達成するために、本発明の投入抵抗骨タン
ク形ガス遮断器は、遮断器を他の機器へ接続するための
遮断器内の接続導体に支持絶縁物が固着され、この支持
絶縁物により投入抵抗が支持されていることを構成上の
特徴とする。
[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the closing resistance bone tank type gas circuit breaker of the present invention has a structure in which the circuit breaker is connected to other equipment. The structure is characterized in that a support insulator is fixed to the connecting conductor, and the making resistor is supported by the support insulator.

(作用) 上記の様な構成を有する本発明においては、前記接続導
体と投入抵抗間は、投入時に抵抗に電流が流れる約10
ns以外は同電位であるため、投入抵抗を支持している
支持絶縁物には遮断器の投入時以外は電気的ストレスが
加わらず、且つ、遮断時にも支持絶縁物沿面の絶縁破壊
の心配はない。
(Function) In the present invention having the above-mentioned configuration, the connection conductor and the closing resistor have a current of about 100 mL, through which a current flows through the resistor at the time of closing.
Since everything other than ns is at the same potential, no electrical stress is applied to the support insulator supporting the closing resistor except when the circuit breaker is closed, and there is no fear of dielectric breakdown along the support insulator even when the circuit breaker is disconnected. do not have.

(実施例) 以下、本発明の一実施例を第1図に従って説明する。な
お、第2図の従来技術と同一の部材については同一の符
号を付し、説明は省略する。
(Example) An example of the present invention will be described below with reference to FIG. Note that the same members as those in the prior art shown in FIG. 2 are designated by the same reference numerals, and explanations thereof will be omitted.

本実施例において、投入抵抗3b、3cの可動側の端部
は、前記従来技術と同様に抵抗接点部3の固定側投入接
点3eに支持されている。一方、遮断器の固定側では、
遮断器を他の機器へ接続するための遮断器内の接続導体
12に支持絶縁物20が固着されており、この支持絶縁
物20に前記投入抵抗3b、3cの固定側の端部が、両
者の接続導体3dを介して支持されている。
In this embodiment, the movable end portions of the closing resistors 3b and 3c are supported by the fixed closing contact 3e of the resistance contact portion 3, as in the prior art described above. On the other hand, on the fixed side of the circuit breaker,
A support insulator 20 is fixed to the connection conductor 12 in the circuit breaker for connecting the circuit breaker to other equipment, and the fixed side ends of the closing resistors 3b and 3c are connected to the support insulator 20. is supported via the connecting conductor 3d.

この様な構成を有する本実施例においては、投入抵抗3
b、3cには、その必要とされる機能上、投入時の約1
0nsLか電流は流れない。この電流の流れる期間には
、この電流により投入抵抗3b、3cには電位差が生じ
、接続導体12と投入抵抗3b、3cを接続している接
続導体3dとの間に電位差が生じる。これにより、支持
絶縁物20には電圧が印加される。しかし、これ以外の
期間には、抵抗に電流が流れているため、接続導体12
と接続導体3dに電位差が生じず、よって支持絶縁物2
0にも電圧が印加されない。この結果、支持絶縁物20
には常時電気的ストレスが印加されず、絶縁信頼性を高
めることができる。また、遮断時には、遮断時に発生す
る熱ガスが、第2図の従来技術とと同様に固定側へ吹付
けられるが、支持絶縁物20は前記理由により電圧が印
加されないため、熱ガスが吹付けることにより、支持絶
縁物20沿面の絶縁性能の低下を心配する必要がなく、
その結果、電流遮断直後の地絡が起こり難い。
In this embodiment having such a configuration, the closing resistor 3
b, 3c, due to their required functions, approximately 1 at the time of input.
0nsL or no current flows. During the period in which this current flows, a potential difference is generated between the closing resistors 3b and 3c, and a potential difference is generated between the connecting conductor 12 and the connecting conductor 3d connecting the closing resistors 3b and 3c. As a result, a voltage is applied to the support insulator 20. However, during periods other than this, current flows through the resistor, so the connecting conductor 12
There is no potential difference between the supporting insulator 2 and the connecting conductor 3d.
No voltage is applied to 0 either. As a result, supporting insulator 20
Since no electrical stress is constantly applied to the insulation, insulation reliability can be improved. In addition, when shutting off, the hot gas generated at the time of shutting off is blown toward the stationary side as in the prior art shown in FIG. As a result, there is no need to worry about deterioration of the insulation performance of the supporting insulator 20,
As a result, a ground fault is less likely to occur immediately after the current is cut off.

[発明の効果コ 以上の通り、本発明によれば、投入抵抗の一端を他の機
器へと接続するための接続導体に固着した支持絶縁物に
より支持するという簡単な手段にもかかわらず、投入抵
抗を支持する支持絶縁物の信頼性を高め、遮断直後の地
絡事故の発生を防ぐことができる信頼性の高い投入抵抗
付タンク形ガス遮断器を提供することができる。
[Effects of the Invention] As described above, according to the present invention, despite the simple means of supporting one end of the closing resistor with a supporting insulator fixed to a connecting conductor for connecting to other equipment, It is possible to provide a highly reliable tank-type gas circuit breaker with a closing resistor that can improve the reliability of the support insulator that supports the resistor and prevent the occurrence of a ground fault immediately after shutoff.

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

第1図は、本発明の投入抵抗付タンク形ガス遮断器の一
実施例を示す断面図、第2図は、従来の投入抵抗付タン
ク形ガス遮断器の一例を示す断面図である。 1・・・ガスタンク、2・・・消弧室、3・・・抵抗接
点部、3b、3c・・・投入抵抗、3d・・・接続導体
、12・・・遮断器を他の機器へ接続するための遮断器
内の接続導体、20・・・支持絶縁物。
FIG. 1 is a sectional view showing an embodiment of a tank-type gas circuit breaker with closing resistance according to the present invention, and FIG. 2 is a sectional view showing an example of a conventional tank-type gas circuit breaker with closing resistance. 1... Gas tank, 2... Arc extinguishing chamber, 3... Resistance contact section, 3b, 3c... Closing resistance, 3d... Connection conductor, 12... Connecting the circuit breaker to other equipment A connecting conductor in the circuit breaker for the purpose of connecting, 20... supporting insulator.

Claims (1)

【特許請求の範囲】[Claims] (1)絶縁性ガスを封入したタンク内に収納され、投入
時の過電圧を抑制するための投入接点と投入抵抗とが直
列に接続された抵抗接点部と、この抵抗接点部と電気的
に並列に接続された主接点部とを有する投入抵抗付タン
ク形ガス遮断器において、遮断器を他の機器へ接続する
ための遮断器内の接続導体に支持絶縁物が固着され、こ
の支持絶縁物によって前記投入抵抗が支持されているこ
とを特徴とする投入抵抗付タンク形ガス遮断器。
(1) A resistive contact section that is housed in a tank filled with insulating gas and has a closing contact and a closing resistor connected in series to suppress overvoltage during closing, and is electrically parallel to this resistive contact section. In a tank-type gas circuit breaker with a closing resistor that has a main contact section connected to a A tank type gas circuit breaker with a closing resistor, characterized in that the closing resistor is supported.
JP5266090A 1990-03-06 1990-03-06 Tank type gas-blast circuit-breaker with closing resistor Pending JPH03257731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5266090A JPH03257731A (en) 1990-03-06 1990-03-06 Tank type gas-blast circuit-breaker with closing resistor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5266090A JPH03257731A (en) 1990-03-06 1990-03-06 Tank type gas-blast circuit-breaker with closing resistor

Publications (1)

Publication Number Publication Date
JPH03257731A true JPH03257731A (en) 1991-11-18

Family

ID=12921021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5266090A Pending JPH03257731A (en) 1990-03-06 1990-03-06 Tank type gas-blast circuit-breaker with closing resistor

Country Status (1)

Country Link
JP (1) JPH03257731A (en)

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