JPH0877887A - Circuit breaker having resistor - Google Patents

Circuit breaker having resistor

Info

Publication number
JPH0877887A
JPH0877887A JP21363094A JP21363094A JPH0877887A JP H0877887 A JPH0877887 A JP H0877887A JP 21363094 A JP21363094 A JP 21363094A JP 21363094 A JP21363094 A JP 21363094A JP H0877887 A JPH0877887 A JP H0877887A
Authority
JP
Japan
Prior art keywords
resistor
contact portion
side contact
fixed
shield
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.)
Granted
Application number
JP21363094A
Other languages
Japanese (ja)
Other versions
JP3369319B2 (en
Inventor
Masayuki Fukunaga
雅之 福永
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 JP21363094A priority Critical patent/JP3369319B2/en
Publication of JPH0877887A publication Critical patent/JPH0877887A/en
Application granted granted Critical
Publication of JP3369319B2 publication Critical patent/JP3369319B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

PURPOSE: To provide a highly reliable circuit breaker having a resistor by which electrically and mechanically stable connection of a resistor can be maintained and surge voltage harmful to a control system and insulating performance of a compressed gas insulation switchgear can be restrained at a fixed value (1.3 pu) or less. CONSTITUTION: A movable contact part 2 and a fixed side contact part 3 are arranged on the same axis in a sealed vassel 1 in which an insulating medium is sealed, and a movable contactor 4 is arranged between these contact parts. A resistor shield 7 is arranged around the fixed side contact part 3, and the resistor shield 7 is fixed to the fixed side contact part 3 by an insulating rod. A resistor 9 has a resistance wire cast by epoxy resin, and a recess is arranged in a connecting part of one end part, and a spring is embedded, and the other end part of the spring is pressed and connected by a cover. The other connecting part of the resistor 9 is fitted into a hole arranged in the fixed side contact part 3.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は、変電所において使用さ
れる抵抗付き断路器に係り、特に、電気的・機械的に優
れた信頼性を有する抵抗体を備えた断路器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disconnector with resistance used in a substation, and more particularly to a disconnector having a resistor having excellent electrical and mechanical reliability.

【0002】[0002]

【従来の技術】一般に、ガス絶縁開閉装置は、3〜6気
圧程度のSF6 ガスなどの絶縁媒体を充填した密閉容器
内に、遮断器、断路器、接地開閉器、変流器、計器用変
圧器などの開閉操作に必要な機器を収納して構成されて
いる。これらの機器のうち、断路器の開閉操作は、通
常、遮断器を開いた状態で行われる。このような断路器
の開閉操作に伴ない、断路器サージと呼ばれるサージが
断路器の極間において発生し、ガス絶縁開閉装置内を伝
播するが、この断路器サージは、UHVクラスではガス
絶縁開閉装置の絶縁を脅かす程度に大きくなるため、何
等かの対応が必要となる。
2. Description of the Related Art Generally, a gas-insulated switchgear is used for a circuit breaker, a disconnector, a grounding switch, a current transformer, and an instrument in an airtight container filled with an insulating medium such as SF 6 gas at about 3 to 6 atmospheres. It is configured to house the equipment required for opening and closing operations such as transformers. Among these devices, the opening / closing operation of the disconnector is usually performed with the breaker opened. Along with such switching operation of the disconnector, a surge called disconnector surge is generated between the poles of the disconnector and propagates in the gas insulated switchgear. This disconnector surge is gas insulated switchgear in the UHV class. Since it becomes large enough to threaten the insulation of the device, some measures must be taken.

【0003】従来から、このような断路器サージの発生
電圧レベルを抑制することを目的として、図2に模式的
に示すような方式の抵抗付き断路器が考えられている。
この図に示すように、SF6 ガスなどの絶縁媒体を充填
したタンク1内には、可動側接触部2と固定側接触部3
とが同軸線上に配置され、この接触部2,3間に可動接
触子4が配置されており、この可動接触子4が接触部
2,3の軸方向に直線的に摺動することにより、断路器
の開閉が行われるように構成されている。すなわち、可
動側接触部2と固定側接触部3の内周部には、それぞ
れ、可動接触子4と接触するフィンガー5,6が設けら
れており、可動接触子4は、可動側接触部2のフィンガ
ー5と常時接触する一方で、固定側接触部3のフィンガ
ー6と接離可能に構成されている。
Conventionally, for the purpose of suppressing the voltage level of the disconnecting switch surge, a disconnecting switch with resistance of the type schematically shown in FIG. 2 has been considered.
As shown in this figure, a movable side contact portion 2 and a fixed side contact portion 3 are provided in a tank 1 filled with an insulating medium such as SF 6 gas.
Are arranged on a coaxial line, and the movable contactor 4 is disposed between the contact portions 2 and 3, and the movable contactor 4 linearly slides in the axial direction of the contact portions 2 and 3, It is configured to open and close the disconnector. That is, fingers 5 and 6 that come into contact with the movable contact 4 are provided on the inner peripheral portions of the movable contact 2 and the fixed contact 3, respectively. While being constantly in contact with the finger 5 of No. 3, the finger 6 of the fixed side contact portion 3 can be brought into contact with and separated from the finger 6.

【0004】そして、固定側接触部3の周囲には、電界
緩和用の抵抗体シールド7が配置されており、断路器投
入時において可動接触子4と抵抗体シールド7の抵抗接
点8との間にギャップgを有するように構成されてい
る。このギャップgは、断路器の開閉操作途中、可動接
触子4の先端が抵抗接点8の近傍に位置する時刻におい
て断路器極間に再点弧が発生した場合、抵抗接点8と可
動接触子4がフラッシオーバによって通電し、この時刻
においては可動接触子4と固定側接触部3やタンク1と
が絶縁破壊を起こすことのないように、絶縁協調面から
の検討を行って決定される。さらに、この抵抗体シール
ド7は、断路器サージを十分に抑制できる値の抵抗体9
を介して固定側接触部3に接続されている。断路器の開
閉操作途中には、可動接触子4と抵抗接点8との間で再
点弧が複数回発生するが、この時の断路器サージレベル
は抵抗体9によって十分抑制される。この抵抗体9の材
料面、構造面については、現在検討がなされている。
A resistor shield 7 for mitigating an electric field is arranged around the fixed side contact portion 3, and between the movable contact 4 and the resistance contact 8 of the resistor shield 7 when the disconnector is turned on. To have a gap g. This gap g is defined by the resistance contact 8 and the movable contact 4 when re-ignition occurs between the disconnector poles at the time when the tip of the movable contact 4 is located near the resistance contact 8 during the opening / closing operation of the disconnector. Is energized by flashover, and at this time, the movable contactor 4 and the fixed side contact portion 3 and the tank 1 are determined by conducting a study from the viewpoint of insulation coordination so as not to cause dielectric breakdown. Further, the resistor shield 7 has a resistor 9 having a value capable of sufficiently suppressing the disconnector surge.
It is connected to the fixed side contact portion 3 via. During the opening / closing operation of the disconnector, re-ignition occurs a plurality of times between the movable contactor 4 and the resistance contact 8, but the disconnector surge level at this time is sufficiently suppressed by the resistor 9. The material and structural aspects of the resistor 9 are currently being studied.

【0005】以上のような方式を採用した従来の抵抗付
き断路器の一例を図8乃至図12に示す。この場合、図
8は断路器全体を示す構成図、図9は図8のA矢視図、
図10は図8の抵抗体の取付け部分の一例を示す構成
図、図11は従来の抵抗付き断路器に使用されるセラミ
ックス抵抗体の一例を示す構成図、図12は図11のセ
ラミックス抵抗体の配置構成の一例を示す平面図であ
る。これらの図面に示す従来の抵抗付き断路器の方式
は、前述した図2の抵抗付き断路器の方式と同様であ
る。
An example of a conventional disconnecting switch with a resistance adopting the above method is shown in FIGS. In this case, FIG. 8 is a configuration diagram showing the whole disconnecting switch, FIG. 9 is a view seen from the arrow A in FIG.
10 is a configuration diagram showing an example of a mounting portion of the resistor of FIG. 8, FIG. 11 is a configuration diagram showing an example of a ceramic resistor used in a conventional disconnector with resistance, and FIG. 12 is a ceramic resistor of FIG. 3 is a plan view showing an example of the arrangement configuration of FIG. The conventional disconnecting switch with resistance shown in these drawings is similar to the disconnecting switch with resistance shown in FIG.

【0006】まず、図8に示すように、SF6 ガスなど
の絶縁媒体を充填したタンク(密閉容器)1内には、可
動側接触部2と固定側接触部3とが上下方向に同軸線上
に配置され、この接触部2,3間に可動接触子4が配置
されており、この可動接触子4が接触部2,3の軸方向
に直線的に摺動することにより、断路器の開閉が行われ
るように構成されている。この可動接触子4は、タンク
1の上部に取り付けられた操作装置10によって、開閉
機構11を介して駆動されるようになっている。すなわ
ち、操作装置10の回転駆動力が、開閉機構11によっ
て回転運動から直線運動に変換され、可動接触子4に伝
達されるように構成されている。
First, as shown in FIG. 8, in a tank (closed container) 1 filled with an insulating medium such as SF 6 gas, a movable side contact portion 2 and a fixed side contact portion 3 are coaxially arranged vertically. The movable contactor 4 is disposed between the contact portions 2 and 3, and the movable contactor 4 linearly slides in the axial direction of the contact portions 2 and 3 to open and close the disconnector. Is configured to take place. The movable contactor 4 is driven by an operating device 10 attached to the upper portion of the tank 1 via an opening / closing mechanism 11. That is, the rotational driving force of the operating device 10 is configured to be converted from the rotational movement to the linear movement by the opening / closing mechanism 11 and transmitted to the movable contactor 4.

【0007】また、抵抗体シールド7は、可動側接触部
2と固定側接触部3の間に配置され、その内周側端部に
は抵抗接点8が設けられている。この抵抗接点8は、投
入状態では可動接触子4とギャップgを介して対向する
ように構成されている。一方、抵抗体シールド7の外周
側端部の下部には、下方に伸びる複数個の抵抗体9が取
り付けられており、抵抗体9の下端部は、固定側接触部
3の接続部3aに取り付けられている。さらに、可動側
接触部2及び固定側接触部3は、タンク1の上下端部に
対して、それぞれ絶縁筒12によって支持されている。
また、可動側接触部2及び固定側接触部3の側面から
は、接続導体13がそれぞれ水平方向に導出され、絶縁
スペーサ14により外部に引き出されている。
The resistor shield 7 is arranged between the movable side contact portion 2 and the fixed side contact portion 3, and a resistance contact 8 is provided at the inner peripheral side end portion thereof. The resistance contact 8 is configured to face the movable contact 4 via the gap g in the closed state. On the other hand, a plurality of downwardly extending resistors 9 are attached to the lower part of the outer peripheral side end of the resistor shield 7, and the lower end of the resistor 9 is attached to the connecting part 3 a of the fixed side contact part 3. Has been. Further, the movable side contact portion 2 and the fixed side contact portion 3 are respectively supported by the insulating cylinder 12 with respect to the upper and lower ends of the tank 1.
In addition, the connection conductors 13 are respectively led out in the horizontal direction from the side surfaces of the movable side contact portion 2 and the fixed side contact portion 3 and are drawn out to the outside by the insulating spacer 14.

【0008】抵抗体9の配置をより詳細に説明すると、
図9に示すように、抵抗体シールド7の外周側端部の下
部には、下方に伸びる3個の抵抗体9が固定側接触部3
の周囲に等間隔で配置されている。この抵抗体9の本体
部は、図10に示すように、互いに逆向きに巻かれた2
本の抵抗線15a,15bの全体をエポキシ樹脂で注型
して形成されている。図中16は、このようにして形成
されたエポキシ樹脂部16を示している。また、この場
合、抵抗線15a,15bには絶縁被覆が施されてお
り、抵抗線15a,15bは互いに密着状態で巻かれて
いる。
The arrangement of the resistor 9 will be described in more detail.
As shown in FIG. 9, at the lower part of the outer peripheral side end of the resistor shield 7, three downwardly extending resistors 9 are provided.
Are evenly spaced around. As shown in FIG. 10, the main body of the resistor 9 is wound in opposite directions.
The entire resistance lines 15a and 15b of the book are formed by casting with an epoxy resin. In the figure, 16 indicates the epoxy resin portion 16 formed in this way. Further, in this case, the resistance wires 15a and 15b are covered with an insulating coating, and the resistance wires 15a and 15b are wound in close contact with each other.

【0009】そして、このようにエポキシ樹脂により注
型された抵抗体9の本体部の両端部には、金具17がエ
ポキシ樹脂部16内に埋め込まれる形で配置されてい
る。この金具17には、抵抗線15a,15bの両端が
ビス18によって締め付けられ、金具17と抵抗線15
a,15bとが電気的・機械的に接続されている。ま
た、金具17の両端部には、ネジ部17aが設けられて
おり、このネジ部17aとボルト19aによって、抵抗
体シールド7及び固定側接触部3の接続部3aに締結さ
れている。すなわち、抵抗体9の両端部の金具17が、
それぞれ抵抗体シールド7の下面及び接続部3aの上面
に接触する状態で、抵抗体シールド7及び接続部3aの
反対面からボルト19aが挿入され、抵抗体シールド7
及び接続部3aを介して、金具17のネジ部17aにね
じ込まれることにより、抵抗体9が抵抗体シールド7及
び固定側接触部3の接続部3aに取り付けられている。
Then, metal fittings 17 are arranged at both ends of the main body of the resistor 9 cast with the epoxy resin in this way so as to be embedded in the epoxy resin portion 16. Both ends of the resistance wires 15a and 15b are fastened to the metal fitting 17 with screws 18, so that the metal fitting 17 and the resistance wire 15 are
a and 15b are electrically and mechanically connected. Further, a threaded portion 17a is provided at both ends of the metal fitting 17, and the threaded portion 17a and a bolt 19a are used to fasten the resistor shield 7 and the connection portion 3a of the fixed side contact portion 3. That is, the metal fittings 17 at both ends of the resistor 9 are
Bolts 19a are inserted from the opposite surfaces of the resistor shield 7 and the connecting portion 3a in contact with the lower surface of the resistor shield 7 and the upper surface of the connecting portion 3a, respectively.
The resistor 9 is attached to the resistor shield 7 and the connecting portion 3a of the fixed side contact portion 3 by being screwed into the threaded portion 17a of the metal fitting 17 via the connecting portion 3a and the connecting portion 3a.

【0010】[0010]

【発明が解決しようとする課題】ところで、本来断路器
は、機械的操作を伴なう機器であるため、開閉操作に伴
ない大きな機械的振動が発生し、さらにその操作が多頻
度に及ぶことが考えられる。したがって、上記のように
抵抗体9が金具17の両端部に設けられたネジ部17a
とボルト19aによって、抵抗体シールド7及び固定側
接触部3の接続部3aに締結されている場合には、この
ような機械的振動は図11に示すように、セラミックス
抵抗体21を構成する絶縁ボルト21bと複数層のリン
グ状の抵抗体21aに加わる。そのため操作回数が多数
回に及ぶに従い、絶縁ボルト21bの緩みや抵抗体21
a間の開離といった不具合を発生させ、セラミックス抵
抗体21の電気的・機械的な特性を劣化させる可能性が
ある。
By the way, since the disconnector is originally a device that involves mechanical operation, a large mechanical vibration is generated due to the opening / closing operation, and the operation occurs frequently. Can be considered. Therefore, as described above, the resistor 9 is provided on the both ends of the metal fitting 17 with the screw portion 17a.
When the resistor shield 7 and the connecting portion 3a of the fixed-side contact portion 3 are fastened to each other by the bolts 19a and the bolts 19a, such mechanical vibration causes insulation of the ceramic resistor 21 as shown in FIG. It is added to the bolt 21b and the ring-shaped resistor 21a having a plurality of layers. Therefore, as the number of operations increases, the insulation bolt 21b is loosened and the resistor 21
There is a possibility of causing a defect such as separation between a and deteriorating the electrical and mechanical characteristics of the ceramic resistor 21.

【0011】一方、セラミックス抵抗体21を点検交換
等の理由で取り外す際、ネジ係合部に滞留していた針状
金属異物が外部に落下付着することにより、電気的強度
の著しい低下をまねくことになる。ここでネジを絶縁物
にすることも考えられるが、絶縁物には破損しやすいと
いう欠点がある。
On the other hand, when the ceramic resistor 21 is removed for inspection or replacement, needle-like metallic foreign matter staying in the screw engaging portion falls and adheres to the outside, resulting in a significant decrease in electrical strength. become. Although it is possible to use an insulator as the screw here, the insulator has a drawback that it is easily damaged.

【0012】また、ネジ締結により、セラミックス抵抗
体21と抵抗体シールド7および固定接触部3との通電
を可能にするためには、金属同士を締結する場合と同程
度のトルクを加える必要がある。しかしながらセラミッ
クス抵抗体21は絶縁注型物であるため、万一内部に注
型上の欠陥があった場合、このような高い引張応力を加
えることにより割れやクラック生じる恐れがある。さら
に絶縁物は金属に比べて線膨脹係数が大きいため、常温
で組立てた後、通電により周囲温度が上昇した場合、両
端を固定した状態だと熱応力を生じる可能性がある。す
なわち注型物の線膨脹係数は10-5オーダーであるた
め、仮に抵抗体の長さを1000mmとすると40Kの
温度上昇でも数mmの伸縮量となり、両端の伸びを許容
しないと抵抗体に無理な応力が発生する。その結果、図
11で示すように、絶縁棒15と抵抗体22の膨脹率の
違いから、l1 ≠l2 となる。
In order to allow the ceramic resistor 21, the resistor shield 7 and the fixed contact portion 3 to be energized by screw fastening, it is necessary to apply the same torque as when fastening metals together. . However, since the ceramic resistor 21 is an insulating casting, if there is a casting defect inside, there is a risk of cracking or cracking due to application of such high tensile stress. Furthermore, since the insulating material has a larger coefficient of linear expansion than metal, when assembled at room temperature and the ambient temperature rises due to energization, thermal stress may occur if both ends are fixed. That is, since the linear expansion coefficient of the casting is on the order of 10 -5 , if the length of the resistor is 1000 mm, the amount of expansion and contraction will be a few mm even if the temperature rises by 40 K, and it is impossible for the resistor to extend at both ends. Stress is generated. As a result, as shown in FIG. 11, due to the difference in expansion coefficient between the insulating rod 15 and the resistor 22, l 1 ≠ l 2 .

【0013】本発明は、以上のような従来技術の課題を
解決するために提案されたものであり、その目的は、電
気的・機械的に安定した抵抗体の接続を維持するととも
に、ガス絶縁開閉装置の制御系や絶縁性能に有害なサー
ジ電圧を一定以下(例えば、1.3pu)に抑えること
が可能な信頼性の高い抵抗付き断路器を提供することで
ある。
The present invention has been proposed in order to solve the problems of the prior art as described above, and an object thereof is to maintain an electrically / mechanically stable resistor connection and to provide gas insulation. It is an object of the present invention to provide a highly reliable disconnecting switch with resistance capable of suppressing a surge voltage harmful to the control system and insulation performance of a switchgear to a certain level or less (for example, 1.3 pu).

【0014】[0014]

【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、請求項1記載の抵抗付き断路器は、絶縁媒体を封
入した密閉容器内に、可動側接触部と固定側接触部とが
同軸線上に配置され、前記可動側接触部と前記固定側接
触部の間に可動接触子が配置されると共に、前記固定側
接触部の周囲には抵抗体シールドが配置され、前記抵抗
体シールドの外側端部の下部には抵抗体が配置され、前
記抵抗体シールドが絶縁ロッドにより前記固定側接触部
に固定され、さらに前記可動側接触部と前記固定側接触
部からは接続導体がそれぞれ導出され、絶縁スペーサに
より外部に引き出された抵抗付き断路器において、前記
抵抗体が、エポキシ樹脂で注型された抵抗線を有し、ま
た両端には金属製の接続部が設けられ、かつ少なくとも
一方の端部にはコイル状のばねを取り付けるための窪み
を有し、前記ばねを介して前記抵抗体シールドもしくは
前記固定側接触部に接続されていることを特徴とする。
In order to achieve the above object, in a disconnector with resistance according to claim 1, a movable side contact part and a fixed side contact part are provided in a hermetically sealed container containing an insulating medium. It is arranged on a coaxial line, a movable contact is arranged between the movable side contact part and the fixed side contact part, and a resistor shield is arranged around the fixed side contact part. A resistor is disposed below the outer end, the resistor shield is fixed to the fixed side contact portion by an insulating rod, and connection conductors are respectively derived from the movable side contact portion and the fixed side contact portion. In the disconnector with resistance drawn to the outside by an insulating spacer, the resistor has a resistance wire cast with epoxy resin, and metal connecting portions are provided at both ends, and at least one of At the end It has a recess for mounting the Le-shaped spring, characterized in that it is connected to the resistor shield or the fixed contact part via the spring.

【0015】請求項2記載の抵抗付き断路器は、請求項
1記載の抵抗付き断路器において、前記抵抗体の接続部
に設けられた前記ばねに、金属箔を巻き付けたことを特
徴とする。
A disconnector with resistance according to a second aspect is the disconnector with resistance according to the first aspect, characterized in that a metal foil is wound around the spring provided at the connection portion of the resistor.

【0016】請求項3記載の抵抗付き断路器は、絶縁媒
体を封入した密閉容器内に、可動側接触部と固定側接触
部とが同軸線上に配置され、前記可動側接触部と前記固
定側接触部の間に可動接触子が配置されると共に、前記
固定側接触部の周囲には抵抗体シールドが配置され、前
記抵抗体シールドの外側端部の下部には抵抗体が配置さ
れ、前記抵抗体シールドが絶縁ロッドにより前記固定側
接触部に固定され、さらに前記可動側接触部と前記固定
側接触部からは接続導体がそれぞれ導出され、絶縁スペ
ーサにより外部に引き出された抵抗付き断路器におい
て、前記抵抗体シールドあるいは前記固定側接触部の抵
抗体接続部分に、前記抵抗体が通過できる穴と着脱自在
の金属製蓋が設けられていることを特徴とする。請求項
4記載の抵抗付き断路器は、絶縁媒体を封入した密閉容
器内に、可動側接触部と固定側接触部とが同軸線上に配
置され、前記可動側接触部と前記固定側接触部の間に可
動接触子が配置されると共に、前記固定側接触部の周囲
には抵抗体シールドが配置され、前記抵抗体シールドの
外側端部の下部には抵抗体が配置され、前記抵抗体シー
ルドが絶縁ロッドにより前記固定側接触部に固定され、
さらに前記可動側接触部と前記固定側接触部からは接続
導体がそれぞれ導出され、絶縁スペーサにより外部に引
き出された抵抗付き断路器において、前記抵抗体に接続
された前記抵抗体シールドと前記可動接触子のギャップ
長を、ギャップ間電圧を定格電圧の30%としたときに
そのギャップで除して20kV/mm以下となる値と
し、前記抵抗体シールド先端に着脱可能な耐アーク性金
属製のリング状平板を設け、前記リング状平板の前記可
動接触子側に前記ギャップ長と同じ半径の円弧を設けた
ことを特徴とする。
According to a third aspect of the present invention, there is provided a disconnecting switch with resistance in which a movable side contact portion and a fixed side contact portion are coaxially arranged in an airtight container containing an insulating medium. A movable contact is disposed between the contact portions, a resistor shield is disposed around the fixed-side contact portion, and a resistor is disposed below an outer end of the resistor shield. A body shield is fixed to the fixed-side contact portion by an insulating rod, connection conductors are respectively derived from the movable-side contact portion and the fixed-side contact portion, and a disconnecting switch with resistance is drawn out to the outside by an insulating spacer, The resistor shield or the resistor connecting portion of the fixed side contact portion is provided with a hole through which the resistor can pass and a detachable metal lid. In the disconnector with resistance according to claim 4, a movable side contact portion and a fixed side contact portion are arranged on a coaxial line in an airtight container in which an insulating medium is sealed, and the movable side contact portion and the fixed side contact portion are connected. A movable contact is arranged between them, a resistor shield is arranged around the fixed side contact portion, a resistor is arranged at a lower portion of an outer end portion of the resistor shield, and the resistor shield is It is fixed to the fixed side contact part by an insulating rod,
Furthermore, in the disconnector with a resistance in which connection conductors are respectively led out from the movable side contact portion and the fixed side contact portion and are pulled out to the outside by an insulating spacer, the resistor shield connected to the resistor and the movable contact. The gap length of the child is a value that is 20 kV / mm or less when divided by the gap when the voltage between the gaps is 30% of the rated voltage, and is a ring made of arc-resistant metal that can be detachably attached to the tip of the resistor shield. A flat plate is provided, and an arc having the same radius as the gap length is provided on the movable contact side of the ring-shaped flat plate.

【0017】請求項5記載の抵抗付き断路器は、絶縁媒
体を封入した密閉容器内に、可動側接触部と固定側接触
部とが同軸線上に配置され、前記可動側接触部と前記固
定側接触部の間に可動接触子が配置されると共に、前記
固定側接触部の周囲には抵抗体シールドが配置され、前
記抵抗体シールドの外側端部の下部には抵抗体が配置さ
れ、前記抵抗体シールドが絶縁ロッドにより前記固定側
接触部に固定され、さらに前記可動側接触部と前記固定
側接触部からは接続導体がそれぞれ導出され、絶縁スペ
ーサにより外部に引き出された抵抗付き断路器におい
て、前記接続導体を、前記固定接触部と前記抵抗体シー
ルドを支持する複数本の前記絶縁ロッドと前記絶縁ロッ
ドの間から導出し、かつ前記抵抗体が前記接続導体の導
出方向とは90°の位置に配置されたことを特徴とす
る。
According to a fifth aspect of the present invention, there is provided a disconnecting switch with resistance in which a movable side contact portion and a fixed side contact portion are coaxially arranged in a hermetically sealed container in which an insulating medium is sealed. A movable contact is disposed between the contact portions, a resistor shield is disposed around the fixed-side contact portion, and a resistor is disposed below an outer end of the resistor shield. A body shield is fixed to the fixed-side contact portion by an insulating rod, connection conductors are respectively derived from the movable-side contact portion and the fixed-side contact portion, and a disconnecting switch with resistance is drawn out to the outside by an insulating spacer, The connecting conductor is led out between a plurality of the insulating rods supporting the fixed contact portion and the resistor shield and the insulating rod, and the resistor is 90 ° from the lead-out direction of the connecting conductor. Characterized in that arranged on location.

【0018】[0018]

【作用】以上のような構成を有する本発明の作用は次の
通りである。すなわち請求項1記載の発明によれば、抵
抗体をばねで支持することにより、断路器の操作時の振
動による衝撃を緩和することが可能であるばかりではな
く、このばねにより電気的接続も確保される。また、ば
ねの伸縮により抵抗体の注型時の寸法のばらつきや膨脹
による全長の変化を吸収することができる。
The operation of the present invention having the above construction is as follows. That is, according to the first aspect of the present invention, by supporting the resistor with a spring, it is possible not only to alleviate the impact due to vibration during operation of the disconnector, but also to secure electrical connection by this spring. To be done. Further, the expansion and contraction of the spring can absorb variations in the dimensions of the resistor during casting and changes in the overall length due to expansion.

【0019】請求項2記載の発明によれば、ばねに通電
可能な金属箔を巻き付けることにより、ばねの両端が短
縮され、サージ電流がばねには流れなくなるため、サー
ジ電流によりばねのコイルの一部が溶着し、その結果ば
ね性が劣化することを防止することができる。
According to the second aspect of the present invention, by winding the metal foil capable of conducting electricity around the spring, both ends of the spring are shortened and the surge current does not flow through the spring. It is possible to prevent the parts from being welded together and consequently deteriorating the spring property.

【0020】請求項3記載の発明によれば、抵抗体の交
換が蓋を取外すという簡易な作業で済み、万一抵抗体に
異常が発見された場合にも断路器自体の撤去分解という
面倒な作業を経ずに交換することが可能となる。
According to the third aspect of the present invention, the resistor can be replaced by a simple work of removing the lid, and even if an abnormality is found in the resistor, the trouble of removing and disassembling the disconnector itself is troublesome. It is possible to replace it without performing work.

【0021】請求項4記載の発明によれば、抵抗体シー
ルドと可動接触子のギャップ間電圧を0.3puとした
ときにギャップ長で除した値を20kV/mmとなる値
とし、なおかつギャップ長g抵抗体シールドの先端部の
半径Rと等しくしたことにより、電界の不平等係数は約
1.32となる。(電気学会技術報告(II部)第98号
の円筒平板の式より不平等係数fは次の式(1)により
求められる。)
According to the fourth aspect of the present invention, when the gap voltage between the resistor shield and the movable contact is 0.3 pu, the value divided by the gap length is 20 kV / mm, and the gap length is By making the radius equal to the radius R of the tip of the g-resistor shield, the inequality coefficient of the electric field becomes about 1.32. (The inequality coefficient f is obtained from the following equation (1) from the equation for the cylindrical flat plate of Technical Report of the Institute of Electrical Engineers of Japan (Part II) No. 98)

【数1】 従って抵抗体シールドの最大電界は26kV/mmとな
り、断路器の使用ガス圧4〜5kg/cm2 ・gでの破
壊電界を越えるため、放電が始まりギャップがつながる
ことによりサージ電圧を1.3pu以下に抑えることが
できる。
[Equation 1] Therefore, the maximum electric field of the resistor shield is 26 kV / mm, which exceeds the breakdown electric field at the gas pressure of the disconnecting switch of 4 to 5 kg / cm 2 · g. Therefore, the discharge starts and the gap is connected to reduce the surge voltage to 1.3 pu or less. Can be suppressed.

【0022】請求項5記載の発明によれば、固定側接触
部から外部に引き出される導体を抵抗体と90°の位置
とすることにより、ギャップ絶縁破壊時に抵抗体に電圧
がかかる際、導体と抵抗体の距離が近いためにコロナ放
電が始まり絶縁物が劣化することを防止することができ
る。
According to the fifth aspect of the present invention, the conductor drawn out from the fixed side contact portion is located at 90 ° with respect to the resistor, so that when the voltage is applied to the resistor during the gap dielectric breakdown, Since the distance between the resistors is short, it is possible to prevent the corona discharge from starting and the insulator from deteriorating.

【0023】[0023]

【実施例】以下、本発明による抵抗付き断路器の実施例
について、図1〜図7を図面を参照して具体的に説明す
る。なお、図8〜図12に示す従来例と同一部分には、
同一符号を付している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a disconnecting switch with resistance according to the present invention will be described below in detail with reference to FIGS. The same parts as those of the conventional example shown in FIGS.
The same reference numerals are attached.

【0024】(1)全体構成 本発明による抵抗付き断路器の一実施例を図1に、その
模式図を図2に示す。本実施例においては、SF6 ガス
などの絶縁媒体を充填したタンク(密閉容器)1内に
は、可動側接触部2と固定側接触部3とが上下方向に同
軸線上に配置され、この接触部2,3間に可動接触子4
が配置されており、この可動接触子4が接触部2,3の
軸方向に直線的に摺動することにより、断路器の開閉が
行われるように構成されている。この可動接触子4は、
タンク1の上部に取り付けられた操作装置10によっ
て、開閉機構11を介して駆動されるようになってい
る。すなわち、操作装置10の回転駆動力が、開閉機構
11によって回転運動から直線運動に変換され、可動接
触子4に伝達されるように構成されている。さらに、可
動側接触部2及び固定側接触部3は、タンク1の上下端
部に対して、それぞれ絶縁筒12によって支持されてい
る。また、可動側接触部2及び固定側接触部3の側面か
らは、接続導体13がそれぞれ水平方向に導出され、絶
縁スペーサ14により外部に引き出されている。
(1) Overall Structure One embodiment of a disconnecting switch with resistance according to the present invention is shown in FIG. 1 and its schematic view is shown in FIG. In this embodiment, a movable side contact portion 2 and a fixed side contact portion 3 are arranged coaxially in the vertical direction in a tank (closed container) 1 filled with an insulating medium such as SF 6 gas, and the contact is made. Moving contact 4 between parts 2 and 3
Is arranged, and the movable contactor 4 is configured to linearly slide in the axial direction of the contact portions 2 and 3 to open and close the disconnector. This movable contact 4 is
It is adapted to be driven via an opening / closing mechanism 11 by an operating device 10 attached to the upper part of the tank 1. That is, the rotational driving force of the operating device 10 is configured to be converted from the rotational movement to the linear movement by the opening / closing mechanism 11 and transmitted to the movable contactor 4. Further, the movable side contact portion 2 and the fixed side contact portion 3 are respectively supported by the insulating cylinder 12 with respect to the upper and lower ends of the tank 1. In addition, the connection conductors 13 are respectively led out in the horizontal direction from the side surfaces of the movable side contact portion 2 and the fixed side contact portion 3 and are drawn out to the outside by the insulating spacer 14.

【0025】また、抵抗体シールド7は、可動側接触部
2と固定側接触部3の間に配置され、その内周側端部に
は抵抗接点8が設けられている。この抵抗接点8は、投
入状態では可動接触子4とギャップgを介して対向する
ように構成されている。一方、抵抗体シールド7の外周
側端部の下部には、下方に伸びる複数個の抵抗体9が取
り付けられており、抵抗体9の下端部は、固定側接触部
3の接続部3aに取り付けられている。
Further, the resistor shield 7 is arranged between the movable side contact portion 2 and the fixed side contact portion 3, and a resistance contact 8 is provided at the inner peripheral side end portion thereof. The resistance contact 8 is configured to face the movable contact 4 via the gap g in the closed state. On the other hand, a plurality of downwardly extending resistors 9 are attached to the lower part of the outer peripheral side end of the resistor shield 7, and the lower end of the resistor 9 is attached to the connecting part 3 a of the fixed side contact part 3. Has been.

【0026】抵抗体シールド7の基端部には2本の抵抗
体9と、複数本の絶縁ロッド22が配置され、一方、こ
れら抵抗体9と絶縁ロッド22の基部は固定側接触部3
に取り付けられている。
At the base end of the resistor shield 7, two resistors 9 and a plurality of insulating rods 22 are arranged. On the other hand, the bases of these resistors 9 and the insulating rods 22 are fixed side contact portions 3.
Attached to.

【0027】(2)抵抗体9の構成 前記のような全体構成を有する本実施例の断路器におい
て、抵抗体9は図3に示すような構成を有している。す
なわち、抵抗体9は、各々逆向きに巻かれた抵抗線15
aおよび抵抗線15bの全体を絶縁物であるエポキシ樹
脂16で注型して形成されている。この抵抗体9の両端
には、一部をエポキシ樹脂16で注型された接続部16
a,16bが設けられ、この部分に抵抗線15a,15
bの両端が引き出されている。抵抗体9の一方の端部の
接続部16aには窪み24が設けられ、ばね25の一端
がはめ込まれるようになっている。このばね25のもう
一方の端部は着脱自在に取付けられた蓋26により上か
ら押えられて接続されるようになっている。抵抗体の他
方の接続部16bは固定側接触部3に設けられた穴27
にはめ込まれている。この抵抗体9の直径Dは、抵抗体
シールド7に設けられた穴径D1 より小さくなってお
り、なおかつこの穴の位置は可動側接触部2のシールド
の直径D2 よりも外側に設けられている。また、ばね2
5には金属箔23が巻き付けられており、ばね25には
直接通電しない構造をとっている。
(2) Structure of the resistor 9 In the disconnector of the present embodiment having the above-mentioned overall structure, the resistor 9 has the structure shown in FIG. That is, the resistor 9 has the resistance wire 15 wound in the opposite direction.
The entire a and the resistance wire 15b are formed by casting with an epoxy resin 16 which is an insulator. At both ends of the resistor 9, a connecting portion 16 partially cast with an epoxy resin 16 is formed.
a, 16b are provided, and the resistance wires 15a, 15
Both ends of b are pulled out. A recess 24 is provided in the connecting portion 16a at one end of the resistor 9 so that one end of the spring 25 can be fitted therein. The other end of the spring 25 is pressed down from above by a lid 26 that is detachably attached to be connected. The other connecting portion 16b of the resistor is provided with a hole 27 provided in the fixed side contact portion 3.
It is embedded in. The diameter D of the resistor 9 is smaller than the diameter D1 of the hole formed in the resistor shield 7, and the position of this hole is provided outside the diameter D2 of the shield of the movable side contact portion 2. . Also, the spring 2
The metal foil 23 is wound around the spring 5, and the spring 25 has a structure in which the current is not directly applied.

【0028】前記抵抗体9および抵抗体シールド7と可
動側接触子4との構成を図4に示す。このうち図4
(a)は、図1のA−A線の矢視図であり、図4(b)
は固定側の断面図である。抵抗体シールド7の先端に設
けられた耐アーク性金属でできたリング状の抵抗接点8
が、可動接触子4とのギャップgとなるよう取り付けら
れている。ここで抵抗接点8をリング状とすることによ
り、図4(c)が示すように可動接触子4がずれた場合
でも狭い方の隙間g2 はg>g2 となるため、ギャップ
の最大値はgとなる。また、抵抗接点8の可動接触子4
側にはgと等しい長さの半径Rの円弧となっている。
FIG. 4 shows the structure of the resistor 9 and the resistor shield 7 and the movable contact 4. Of these, Figure 4
FIG. 4A is a view taken along the line AA of FIG. 1, and FIG.
FIG. 6 is a sectional view of a fixed side. A ring-shaped resistance contact 8 made of arc-resistant metal provided at the tip of the resistor shield 7.
Are attached so that a gap g with the movable contactor 4 is provided. Since the resistance contact 8 has a ring shape, the narrower gap g 2 is g> g 2 even when the movable contact 4 is displaced as shown in FIG. Is g. In addition, the movable contact 4 of the resistance contact 8
On the side, an arc having a radius R and a length equal to g is formed.

【0029】(3)接続導体13の配置例 前記抵抗体9と固定側接触部3に接続している接続導体
13の配置例を図5に示す。これは、図1のB−B線の
矢視図に相当する。ここでは、絶縁ロッド22が4本の
場合を示す。2本の抵抗体9は2本の接続導体13に対
しそれぞれ90°の位置にくるように配置している。
(3) Arrangement Example of Connection Conductor 13 FIG. 5 shows an arrangement example of the connection conductor 13 connected to the resistor 9 and the fixed side contact portion 3. This corresponds to a view taken along the line BB in FIG. Here, the case where the number of the insulating rods 22 is four is shown. The two resistors 9 are arranged at positions of 90 ° with respect to the two connecting conductors 13, respectively.

【0030】(4)ギャップ長の値 一方、抵抗体9を接続した抵抗体シールド7と可動接触
子4のギャップを、ギャップ間電圧0.3pu時にギャ
ップ長gで除した値が20kV/mmとなるようにし、
なおかつ抵抗体シールド7先端の抵抗接点8のRをR=
gとする。
(4) Gap length value On the other hand, the value obtained by dividing the gap between the resistor shield 7 to which the resistor 9 is connected and the movable contactor 4 by the gap length g when the gap voltage is 0.3 pu is 20 kV / mm. So that
In addition, R of the resistance contact 8 at the tip of the resistor shield 7 is R =
g.

【0031】(5)作用・効果 以上のような構成を有する本実施例の作用は次の通りで
ある。まず、抵抗体21に加わる機械的振動、寸法公差
および熱膨脹による伸縮をばねの伸縮により無力化する
ことができ、なおかつ電気的な接続は確保される。ま
た、ネジによる締結と違い、抵抗体9を取付け取外しす
る際に、SF6 ガスの絶縁性能を著しく劣化させる針状
異物の発生する可能性は極めて低く、抵抗体シールド7
の蓋を外すことで何度でも取外しすることが可能であ
る。また、金具17のばね25を入れる部分を抵抗体2
1の注型物の内側にはめ込むことで、抵抗体21の全長
Lを短くでき、なおかつ抵抗線15a,15b端部の電
界を緩和することができる。また、金属箔23を巻き付
けることによって、ばね25がコイル状であることから
生じるインダクタンスLによって、サージ性の高周波電
圧によるアーク発生を防止することが可能である。
(5) Operation / Effect The operation of the present embodiment having the above-mentioned structure is as follows. First, mechanical vibration applied to the resistor 21, dimensional tolerance, and expansion and contraction due to thermal expansion can be neutralized by expansion and contraction of the spring, and electrical connection is secured. Further, unlike the case of fastening with a screw, when the resistor 9 is attached and detached, the possibility that needle-like foreign matter which significantly deteriorates the insulation performance of SF 6 gas is generated is extremely low.
It can be removed many times by removing the lid. Further, the portion of the metal fitting 17 into which the spring 25 is inserted is the resistor 2
By fitting the molded article 1 into the inside of the cast article, the total length L of the resistor 21 can be shortened and the electric field at the ends of the resistor wires 15a and 15b can be relaxed. Further, by winding the metal foil 23, it is possible to prevent the arc generation due to the surge high frequency voltage due to the inductance L generated by the spring 25 having the coil shape.

【0032】また、抵抗体9を接続した抵抗体シールド
7と可動接触子4のギャップを、ギャップ間電圧0.3
pu時にギャップ長gで除した値が20kV/mmとな
るようにし、なおかつ抵抗体シールド7先端の抵抗接点
8のRをR=gとすることでギャップ間電界が26kV
/cm以上となるため、ギャップは0.3pu以上の電
圧で放電する。よって、図7が示すように、波頂点でギ
ャップ放電が起こっても、対地サージを1.3pu以下
に抑えることが可能になる。ところで、1100kV定
格電圧のUHV系統では、
Further, the gap between the resistor shield 7 to which the resistor 9 is connected and the movable contactor 4 is set to a voltage between the gaps of 0.3.
When pu is set, the value divided by the gap length g is set to 20 kV / mm, and R of the resistance contact 8 at the tip of the resistor shield 7 is set to R = g.
/ Cm or more, the gap discharges at a voltage of 0.3 pu or more. Therefore, as shown in FIG. 7, even if the gap discharge occurs at the wave peak, the ground surge can be suppressed to 1.3 pu or less. By the way, in the 1100 kV rated voltage UHV system,

【数2】 より、0.3pu=270kVより、270/20=1
3.5mm以下である必要がある。図6に示すように、
抵抗接点8のRを14mmにしてギャップ長を変えて表
面電荷法により電界を計算した結果は13mmで、ギャ
ップ破壊電圧が0.3puとなっており、略同様の結果
が得られる。
[Equation 2] Therefore, from 0.3 pu = 270 kV, 270/20 = 1
It must be 3.5 mm or less. As shown in FIG.
The result of calculating the electric field by the surface charge method with R of the resistance contact 8 being 14 mm and changing the gap length is 13 mm, and the gap breakdown voltage is 0.3 pu, and substantially the same result is obtained.

【0033】以上のように、本実施例によれば、抵抗体
9には機械的振動や力が加わらないため、機械的にも電
気的にも安定した接続が可能である。特に断路器の開閉
サージは雷のようなインパルス性の過電圧と違って毎開
閉時発生し、必ず断路器の操作振動を伴うため、非常に
安定した接続が要求されるが、本実施例によればそれを
満たすことが可能である。また、ギャップの破壊電圧値
もギャップの寸法をg以下にすることでガス絶縁開閉装
置の制御系や絶縁性能に有害なサージ電圧を一定以下
(1.3pu)に抑えることが可能な信頼性の高い抵抗
付き断路器を提供できる。
As described above, according to this embodiment, no mechanical vibration or force is applied to the resistor 9, so that stable connection can be achieved both mechanically and electrically. In particular, the switching surge of the disconnecting switch is generated at every switching unlike the impulse-like overvoltage such as lightning, and the operating vibration of the disconnecting switch is always involved, so a very stable connection is required. It is possible to meet it. Also, the breakdown voltage value of the gap can be suppressed to a certain level (1.3 pu) or less by suppressing the surge voltage harmful to the control system and the insulation performance of the gas insulated switchgear by setting the size of the gap to g or less. A disconnector with high resistance can be provided.

【0034】[0034]

【発明の効果】以上の通り本発明によれば、抵抗体をば
ねによって支持し、なおかつ抵抗体シールドと可動接触
子のギャップを一定値以下とすることで機械的、電気的
信頼性の高い抵抗付き断路器を提供できる。
As described above, according to the present invention, the resistor is supported by the spring, and the gap between the resistor shield and the movable contact is set to a certain value or less, so that the resistance with high mechanical and electrical reliability is obtained. A disconnecting switch can be provided.

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

【図1】本発明の抵抗付き断路器の実施例を示す断面
図。
FIG. 1 is a sectional view showing an embodiment of a disconnecting switch with resistance according to the present invention.

【図2】図1の抵抗体の取付部分を模式的に示す断面
図。
FIG. 2 is a sectional view schematically showing a mounting portion of the resistor of FIG.

【図3】図1の抵抗体の取付部分の一例を示す断面図。3 is a cross-sectional view showing an example of a mounting portion of the resistor of FIG.

【図4】図1の抵抗体、抵抗シールド及び可動側接触子
の構成図で(a)は図1のA−A線の矢視図、(b)は
固定側の断面図、(c)は可動接触子とギャップ長の関
係を示す図。
4A and 4B are configuration diagrams of the resistor, the resistance shield, and the movable side contactor in FIG. 1, FIG. 4A is a view taken along the line AA of FIG. 1, FIG. FIG. 4 is a diagram showing a relationship between a movable contactor and a gap length.

【図5】図1のB−B線の矢視図。5 is a view taken along the line BB in FIG.

【図6】本発明の実施例の表面電荷法によるギャップ破
壊電圧の計算結果。
FIG. 6 is a calculation result of a gap breakdown voltage by a surface charge method according to an example of the present invention.

【図7】本発明の実施例の断路器開閉時のサージ波形の
模式図。
FIG. 7 is a schematic diagram of a surge waveform when the disconnector of the embodiment of the present invention is opened and closed.

【図8】従来の抵抗付き断路器の一例を示す断面図。FIG. 8 is a sectional view showing an example of a conventional disconnector with resistance.

【図9】図8のA−A線の矢視図。9 is a view taken along the line AA of FIG.

【図10】図8の抵抗体の取付部分の一例を示す構成
図。
10 is a configuration diagram showing an example of a mounting portion of the resistor of FIG.

【図11】従来の抵抗付き断路器に使用されるセラミッ
クス抵抗体の一例を示す構成図。
FIG. 11 is a configuration diagram showing an example of a ceramic resistor used in a conventional disconnector with resistance.

【図12】図11のセラミックス抵抗体の配置構成の一
例を示す平面図。
12 is a plan view showing an example of the arrangement configuration of the ceramic resistors of FIG.

【符号の説明】[Explanation of symbols]

1…タンク(密閉容器) 2…可動側接触部 3…固定側接触部 3a…接続部 4…可動接触子 5…フィンガー 6…フィンガー 7…抵抗体シールド 8…抵抗接点 9…抵抗体 10…操作装置 11…開閉機構 12…絶縁筒 13…接続導体 14…絶縁スペーサ 15a,15b…抵抗線 16…エポキシ樹脂部 16a,16b…接続部 17…金具 17a…ネジ部 18…ビス 19a…ボルト 21…セラミックス抵抗体 21a…抵抗体 21b…絶縁ボルト 22…絶縁ロッド 23…金属箔 24…窪み 25…ばね 26…蓋 27…穴 DESCRIPTION OF SYMBOLS 1 ... Tank (sealed container) 2 ... Movable side contact part 3 ... Fixed side contact part 3a ... Connection part 4 ... Movable contactor 5 ... Finger 6 ... Finger 7 ... Resistor shield 8 ... Resistive contact 9 ... Resistor 10 ... Operation Device 11 ... Opening / closing mechanism 12 ... Insulating cylinder 13 ... Connection conductor 14 ... Insulating spacers 15a, 15b ... Resistance wire 16 ... Epoxy resin parts 16a, 16b ... Connection part 17 ... Metal fittings 17a ... Screw part 18 ... Screw 19a ... Bolt 21 ... Ceramics Resistor 21a ... Resistor 21b ... Insulating bolt 22 ... Insulating rod 23 ... Metal foil 24 ... Indent 25 ... Spring 26 ... Lid 27 ... Hole

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 絶縁媒体を封入した密閉容器内に、可動
側接触部と固定側接触部とが同軸線上に配置され、前記
可動側接触部と前記固定側接触部の間に可動接触子が配
置されると共に、前記固定側接触部の周囲には抵抗体シ
ールドが配置され、前記抵抗体シールドの外側端部の下
部には抵抗体が配置され、前記抵抗体シールドが絶縁ロ
ッドにより前記固定側接触部に固定され、さらに前記可
動側接触部と前記固定側接触部からは接続導体がそれぞ
れ導出され、絶縁スペーサにより外部に引き出された抵
抗付き断路器において、 前記抵抗体が、エポキシ樹脂で注型された抵抗線を有
し、また両端には金属製の接続部が設けられ、かつ少な
くとも一方の端部にはコイル状のばねを取り付けるため
の窪みを有し、前記ばねを介して前記抵抗体シールドも
しくは前記固定側接触部に接続されていることを特徴と
する抵抗付き断路器。
1. A movable side contact portion and a fixed side contact portion are coaxially arranged in a sealed container in which an insulating medium is sealed, and a movable contact is provided between the movable side contact portion and the fixed side contact portion. A resistor shield is disposed around the fixed-side contact portion, a resistor is disposed below an outer end of the resistor shield, and the resistor shield is connected to the fixed side by an insulating rod. In the disconnector with a resistor, which is fixed to the contact portion, and in which the connection conductors are respectively led out from the movable side contact portion and the fixed side contact portion, and which are drawn out to the outside by an insulating spacer, the resistor is injected with an epoxy resin. A shaped resistance wire, metal connection parts are provided at both ends, and at least one end part has a recess for attaching a coiled spring, and the resistance is provided via the spring. Body seal Or resistance with disconnectors, characterized in that connected to the fixed contact part.
【請求項2】 前記抵抗体の接続部に設けられた前記ば
ねに、金属箔を巻き付けたことを特徴とする請求項1記
載の抵抗付き断路器。
2. The disconnector with a resistor according to claim 1, wherein a metal foil is wound around the spring provided at the connection portion of the resistor.
【請求項3】 絶縁媒体を封入した密閉容器内に、可動
側接触部と固定側接触部とが同軸線上に配置され、前記
可動側接触部と前記固定側接触部の間に可動接触子が配
置されると共に、前記固定側接触部の周囲には抵抗体シ
ールドが配置され、前記抵抗体シールドの外側端部の下
部には抵抗体が配置され、前記抵抗体シールドが絶縁ロ
ッドにより前記固定側接触部に固定され、さらに前記可
動側接触部と前記固定側接触部からは接続導体がそれぞ
れ導出され、絶縁スペーサにより外部に引き出された抵
抗付き断路器において、 前記抵抗体シールドあるいは前記固定側接触部の抵抗体
接続部分に、前記抵抗体が通過できる穴と着脱自在の金
属製蓋が設けられていることを特徴とする抵抗付き断路
器。
3. A movable side contact portion and a fixed side contact portion are arranged coaxially in a sealed container in which an insulating medium is sealed, and a movable contact is provided between the movable side contact portion and the fixed side contact portion. A resistor shield is disposed around the fixed-side contact portion, a resistor is disposed below an outer end of the resistor shield, and the resistor shield is connected to the fixed side by an insulating rod. In the disconnector with resistance, which is fixed to the contact portion, and in which the connecting conductors are respectively led out from the movable side contact portion and the fixed side contact portion and which are drawn out by an insulating spacer, the resistor shield or the fixed side contact A disconnector with resistance, wherein a hole through which the resistor can pass and a detachable metal lid are provided in a resistor connecting portion of the portion.
【請求項4】 絶縁媒体を封入した密閉容器内に、可動
側接触部と固定側接触部とが同軸線上に配置され、前記
可動側接触部と前記固定側接触部の間に可動接触子が配
置されると共に、前記固定側接触部の周囲には抵抗体シ
ールドが配置され、前記抵抗体シールドの外側端部の下
部には抵抗体が配置され、前記抵抗体シールドが絶縁ロ
ッドにより前記固定側接触部に固定され、さらに前記可
動側接触部と前記固定側接触部からは接続導体がそれぞ
れ導出され、絶縁スペーサにより外部に引き出された抵
抗付き断路器において、 前記抵抗体に接続された前記抵抗体シールドと前記可動
接触子のギャップ長を、ギャップ間電圧を定格電圧の3
0%としたときにそのギャップで除して20kV/mm
以下となる値とし、前記抵抗体シールド先端に着脱可能
な耐アーク性金属製のリング状平板を設け、前記リング
状平板の前記可動接触子側に前記ギャップ長と同じ半径
の円弧を設けたことを特徴とする抵抗付き断路器。
4. The movable side contact portion and the fixed side contact portion are arranged coaxially in an airtight container containing an insulating medium, and a movable contactor is provided between the movable side contact portion and the fixed side contact portion. A resistor shield is disposed around the fixed-side contact portion, a resistor is disposed below an outer end of the resistor shield, and the resistor shield is connected to the fixed side by an insulating rod. In a disconnector with a resistor, which is fixed to a contact portion, and connection conductors are respectively led out from the movable side contact portion and the fixed side contact portion, and which are drawn out to the outside by an insulating spacer, the resistor connected to the resistor body. The gap length between the body shield and the movable contactor, the voltage between the gap is the rated voltage of 3
When set to 0%, divided by the gap, 20 kV / mm
The following value is set, and a removable arc-resistant metal ring-shaped flat plate is provided at the tip of the resistor shield, and an arc having the same radius as the gap length is provided on the movable contact side of the ring-shaped flat plate. Disconnector with resistance.
【請求項5】 絶縁媒体を封入した密閉容器内に、可動
側接触部と固定側接触部とが同軸線上に配置され、前記
可動側接触部と前記固定側接触部の間に可動接触子が配
置されると共に、前記固定側接触部の周囲には抵抗体シ
ールドが配置され、前記抵抗体シールドの外側端部の下
部には抵抗体が配置され、前記抵抗体シールドが絶縁ロ
ッドにより前記固定側接触部に固定され、さらに前記可
動側接触部と前記固定側接触部からは接続導体がそれぞ
れ導出され、絶縁スペーサにより外部に引き出された抵
抗付き断路器において、 前記接続導体を、前記固定接触部と前記抵抗体シールド
を支持する複数本の前記絶縁ロッドと前記絶縁ロッドの
間から導出し、かつ前記抵抗体が前記接続導体の導出方
向とは90°の位置に配置されたことを特徴とする抵抗
付き断路器。
5. A movable side contact portion and a fixed side contact portion are arranged coaxially in an airtight container containing an insulating medium, and a movable contactor is provided between the movable side contact portion and the fixed side contact portion. A resistor shield is disposed around the fixed-side contact portion, a resistor is disposed below an outer end of the resistor shield, and the resistor shield is connected to the fixed side by an insulating rod. In the disconnector with resistance, which is fixed to the contact portion, and in which the connection conductors are respectively led out from the movable side contact portion and the fixed side contact portion and are drawn out to the outside by an insulating spacer, the connection conductor is connected to the fixed contact portion. And a plurality of the insulating rods that support the resistor shield and the insulating rod, and the resistor is arranged at a position of 90 ° with respect to the direction of the connecting conductor. Disconnector with resistance.
JP21363094A 1994-09-07 1994-09-07 Disconnector with resistance Expired - Fee Related JP3369319B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21363094A JP3369319B2 (en) 1994-09-07 1994-09-07 Disconnector with resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21363094A JP3369319B2 (en) 1994-09-07 1994-09-07 Disconnector with resistance

Publications (2)

Publication Number Publication Date
JPH0877887A true JPH0877887A (en) 1996-03-22
JP3369319B2 JP3369319B2 (en) 2003-01-20

Family

ID=16642343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21363094A Expired - Fee Related JP3369319B2 (en) 1994-09-07 1994-09-07 Disconnector with resistance

Country Status (1)

Country Link
JP (1) JP3369319B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236370A (en) * 2013-04-19 2013-08-07 镇江维依埃电工研究所有限公司 Four-connecting-rod and three-workstation isolating switch
CN111710552A (en) * 2020-05-14 2020-09-25 河南平高电气股份有限公司 Moving contact substrate and three-station isolation grounding switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103236370A (en) * 2013-04-19 2013-08-07 镇江维依埃电工研究所有限公司 Four-connecting-rod and three-workstation isolating switch
CN111710552A (en) * 2020-05-14 2020-09-25 河南平高电气股份有限公司 Moving contact substrate and three-station isolation grounding switch
WO2021227487A1 (en) * 2020-05-14 2021-11-18 河南平高电气股份有限公司 Moving contact base body, and three-station isolation grounding switch

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