JPH06251825A - High voltage load-break bushing - Google Patents

High voltage load-break bushing

Info

Publication number
JPH06251825A
JPH06251825A JP5800193A JP5800193A JPH06251825A JP H06251825 A JPH06251825 A JP H06251825A JP 5800193 A JP5800193 A JP 5800193A JP 5800193 A JP5800193 A JP 5800193A JP H06251825 A JPH06251825 A JP H06251825A
Authority
JP
Japan
Prior art keywords
conductor
bushing
male plug
arc
conductive housing
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
JP5800193A
Other languages
Japanese (ja)
Inventor
Satoru Yamaguchi
哲 山口
Atsushi Wakidokoro
厚 脇所
Hitoshi Kobayashi
均 小林
Sachio Tazawa
佐智夫 田沢
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.)
Hitachi Cable Ltd
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Hitachi Cable Ltd
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 Tokyo Electric Power Co Inc, Hitachi Cable Ltd filed Critical Tokyo Electric Power Co Inc
Priority to JP5800193A priority Critical patent/JPH06251825A/en
Publication of JPH06251825A publication Critical patent/JPH06251825A/en
Pending legal-status Critical Current

Links

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Insulators (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

PURPOSE:To minimize gas generated by arc discharge by providing a guide rod to push and widen the receipt inner face of a tubular piston against the inner face of a conductive housing and a spring to move the tubular piston. CONSTITUTION:A male plug which is formed with an arc-extinguishing rod at the end and a conductor is first passed through an arc-extinguisher 30 at the end of a bushing 20 and then put in contact with a receptacle 31 at the end of a slidable conductor 24. The receipt 31 has the inner diameter wider when the male plug is inserted therein at a greater power. After hitting the receptacle 31 of the conductor 24, the inserted male plug moves the conductor 24 to the corner of the bushing 20. At this time, electric spark between a conductive housing 23 and a male plug conductor is prevented by a stopper 29. If the male plug is further inserted into the corner, the receipt 31 is widened inside so that the slidable conductor 24 is pushed back and reset by a spring 28. Meanwhile, arc occurs but instantly extinguished.

Description

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

【0001】[0001]

【産業上の利用分野】この発明は、変圧器の一次側に接
続され、電力ケーブル端末部と着脱される高電圧負荷開
閉形ブッシングに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high voltage load switchgear type bushing which is connected to the primary side of a transformer and is attached to and detached from an end portion of a power cable.

【0002】[0002]

【従来の技術】高電圧負荷開閉形ブッシング(以下、ブ
ッシングと称す)は、負荷が接続される変圧器の1次側
導体と幹線ケーブルとを相互接続するためのものであ
り、その代表的構造として、特開平2−109280号
公報を参照して説明する。
2. Description of the Related Art A high voltage load switching type bushing (hereinafter referred to as a bushing) is for interconnecting a primary side conductor of a transformer to which a load is connected and a trunk cable, and its typical structure. This will be described with reference to Japanese Patent Laid-Open No. 2-109280.

【0003】図4および図5は、上記公報の第1図,第
2図に示される従来の高電圧負荷開閉形ブッシングの構
成を示す断面図である。即ち、ブッシング10内には変
圧器側導体と接続される導電性ハウジング12が具備さ
れており、この導電性ハウジング12にはハウジング内
面と電気的に導電状態で軸方向に動くことができる接触
子13を有し、ブッシング内10に挿入される雄形プラ
グ(図示せず)と雄雌形接続できるレセップ14を具備
した管状ピストン15を内部に移動できるように嵌合し
て設けられている。この管状ピストン15の雄形プラグ
挿入側には、雄形プラグの挿入時にプラグとレセップ1
4間で発生するアーク放電を、そのアーク放電による高
熱によりアーク抑制ガスを発生させ得る消弧子16と、
その消弧子16を上記管状ピストン15に固定させてお
くガイド筒17を有している。
FIGS. 4 and 5 are sectional views showing the structure of the conventional high voltage load switching type bushing shown in FIGS. 1 and 2 of the above publication. That is, the bushing 10 is provided with a conductive housing 12 connected to the transformer-side conductor, and the conductive housing 12 is capable of moving in the axial direction in an electrically conductive state with the inner surface of the housing. A tubular piston 15 having a male plug 13 (not shown) having a plug 13 inserted into the bushing 10 and having a male-female connection is provided so as to be movable therein. On the male plug insertion side of this tubular piston 15, the plug and the receptacle 1 are inserted when the male plug is inserted.
An arc extinguishing element 16 capable of generating an arc suppressing gas by the high heat generated by the arc discharge,
The arc extinguishing element 16 has a guide tube 17 for fixing it to the tubular piston 15.

【0004】上記管状ピストン15の変圧器側端部に
は、上記導電性ハウジングと機械的に固定させておくた
めの凹みがあり、導電性ハウジング12内面の凸部と係
合し、ある力以上になったときに外れるラッチ機構18
を有している。
At the end of the tubular piston 15 on the transformer side, there is a recess for mechanically fixing it to the conductive housing. The recess is engaged with the convex portion on the inner surface of the conductive housing 12 and has a certain force or more. Latch mechanism 18 that comes off when it becomes
have.

【0005】周知のように、負荷投入、特に短絡誤投入
の場合、雄形プラグをブッシング10内のレセップ14
に差し込もうとすると、プラグとレセップ14間にアー
ク放電が発生して、プラグとレセップ14の機械的接触
がなされるまでそのアークが持続することになる。
As is well known, when a load is applied, particularly when a short circuit is erroneously applied, a male plug is inserted into the bush 14 in the receiving 14.
If an attempt is made to insert the plug into the socket, an arc discharge will occur between the plug and the receptacle 14, and the arc will continue until the plug and the receptacle 14 are mechanically contacted.

【0006】次に、上記従来技術でのアーク放電発生時
の挙動を説明する。レセップ14と雄形プラグ間に発生
したアーク放電により上記消弧子16の内面はアークに
よる高熱により溶融して気化し、アーク抑制ガスを発生
させる。このアーク抑制ガスは管状ピストン15の内面
を通って管状ピストン端部と導電性ハウジング12の内
壁との空隙部であるチャンバー19に送り込まれる。チ
ャンバー19に送り込まれたアーク抑制ガスの圧力が十
分高くなったとき、上記ラッチ機構18が外れ、管状ピ
ストン15が図5に示すように移動することにより、挿
入途中であった雄形プラグとレセップ14との機械的接
触が果たされ、アーク放電が消滅するというものであ
る。
Next, the behavior of the above-mentioned prior art when an arc discharge occurs will be described. Due to the arc discharge generated between the receptacle 14 and the male plug, the inner surface of the arc extinguishing element 16 is melted and vaporized by the high heat of the arc, and an arc suppressing gas is generated. The arc suppressing gas passes through the inner surface of the tubular piston 15 and is sent to the chamber 19 which is a space between the end of the tubular piston and the inner wall of the conductive housing 12. When the pressure of the arc suppressing gas sent into the chamber 19 becomes sufficiently high, the latch mechanism 18 is released and the tubular piston 15 moves as shown in FIG. The mechanical contact with 14 is completed, and the arc discharge is extinguished.

【0007】[0007]

【発明が解決しようとする課題】ところで、上述した従
来例では、度重なるアーク放電により発生するガスによ
る導電性ハウジング12の内面の汚れにより、ハウジン
グ12と管状ピストン15の接触子13との電気的接触
抵抗の増加を招き発熱の虞がある。また、汚れによる摩
擦抵抗の大きさが変化するため、管状ピストン15の軸
方向の摺動特性が変化してしまう虞がある。
By the way, in the above-mentioned conventional example, the electrical contact between the housing 12 and the contactor 13 of the tubular piston 15 is caused by the contamination of the inner surface of the conductive housing 12 by the gas generated by the repeated arc discharge. This may increase contact resistance and cause heat generation. Moreover, since the magnitude of the frictional resistance due to dirt changes, the sliding characteristics of the tubular piston 15 in the axial direction may change.

【0008】この発明はこのような点に鑑みてなされた
もので、上述した従来技術の欠点を解消し、アーク放電
により発生するガスを最小限にとどめ、安定して接触を
保つことができる新規な高電圧負荷開閉形ブッシングを
提供することを目的する。
The present invention has been made in view of the above points, and it is possible to eliminate the above-mentioned drawbacks of the conventional technique, minimize the gas generated by arc discharge, and maintain stable contact. An object of the present invention is to provide a high voltage load switching type bushing.

【0009】[0009]

【課題を解決するための手段】この発明は、ブッシング
内に変圧器側導体と接続される導電性ハウジングを備
え、導電性ハウジング内にはハウジング内面と電気的に
導電状態で軸方向に動くことができる接触子を有し、か
つ、ブッシング内に挿入される雄形プラグ導体と雄雌形
接続できるレセップを有する管状ピストンを備えた高電
圧負荷開閉形ブッシングにおいて、導電性ハウジング内
面に管状ピストンのレセップ内面を押し広げるためのガ
イド棒および管状ピストンを移動させるばねを具備し、
管状ピストンの移動を機械的に行なうことを特徴とする
高電圧負荷開閉形ブッシングである。
According to the present invention, there is provided a conductive housing, which is connected to a transformer-side conductor, in a bushing, and the conductive housing axially moves in an electrically conductive state with the inner surface of the housing. In a high-voltage load switchgear bushing having a tubular piston having a male plug conductor inserted into the bushing and a receptacle capable of male-female connection inserted in the bushing, A spring for moving a guide rod and a tubular piston for expanding the inner surface of the receiving cup,
A high voltage load open / close type bushing characterized in that the tubular piston is moved mechanically.

【0010】[0010]

【作用】導電性ハウジングの内面に管状ピストンのレセ
ップ内面を押し広げるためのガイド棒を固定させ、その
周囲に管状ピストンを移動させるばねを具備したので、
摺動導体の摺動特性を機械的に一定にすることができ
る。
Since the guide rod for pushing and widening the inner surface of the receiving piston of the tubular piston is fixed to the inner surface of the conductive housing, and the spring for moving the tubular piston is provided around the guide rod.
The sliding characteristics of the sliding conductor can be made mechanically constant.

【0011】[0011]

【実施例】以下、図面に基づいてこの発明の実施例を説
明する。図1は実施例の高電圧負荷開閉形ブッシングの
構成を示す断面図である。即ち、導電性ハウジング23
は変圧器側導体21に接続され、外側をエポキシ樹脂,
EPDM等の絶縁ゴム等の絶縁体22により円筒状にな
ってケーブル端末部と係合し得る形状に成形されたブッ
シング20を形成している。このブッシング20内には
導電性ハウジング23の内面と電気的に導電状態で軸方
向に動くことができる接触子25を具備し、ブッシング
20内に挿入される図示しない雄形プラグと雄雌形接続
できるレセップ31を具備した摺動導体24を有してい
る。ブッシング20の先端部には、上記従来技術と同様
の働きをする消弧子30と、摺動導体24,消弧子30
をブッシング20内に固定させておくためのストッパー
29が取り付けられている。上記ストッパー29は雄形
プラグ挿入時に導電性ハウジング23と図示しない雄形
プラグの導体との電気的閃絡を防ぐため絶縁体で形成さ
れる。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the structure of a high voltage load switching type bushing according to an embodiment. That is, the conductive housing 23
Is connected to the transformer-side conductor 21 and the outside is epoxy resin,
The bushing 20 is formed into a cylindrical shape by an insulator 22 such as insulating rubber such as EPDM and formed into a shape that can be engaged with the cable end portion. The bushing 20 is provided with a contact 25 capable of moving in the axial direction in an electrically conductive state with the inner surface of the conductive housing 23. The contact 25 is inserted into the bushing 20 and has a male plug (not shown) and a male-female connection. It has a sliding conductor 24 with a possible receipt 31. At the tip of the bushing 20, an arc extinguishing element 30, which functions similarly to the above-described conventional technique, a sliding conductor 24, and an arc extinguishing element 30.
A stopper 29 for fixing the inside of the bushing 20 is attached. The stopper 29 is formed of an insulator in order to prevent electrical flashover between the conductive housing 23 and the conductor of the male plug (not shown) when the male plug is inserted.

【0012】ブッシング20の摺動導体24の奥には、
摺動導体24を所定位置に位置させるばね28,ワッシ
ャー27を具備しており、ワッシャー27の内径よりも
小さい径を長手方向に持ち、端部をワッシャー27の内
径よりも大きい径を持つガイド棒26が変圧器側導体2
1に接続され、ばね28,ワッシャー27を固定してい
る。
At the back of the sliding conductor 24 of the bushing 20,
A guide rod having a spring 28 for positioning the sliding conductor 24 at a predetermined position and a washer 27, having a diameter smaller than the inner diameter of the washer 27 in the longitudinal direction and having an end portion larger than the inner diameter of the washer 27. 26 is the transformer-side conductor 2
1, the spring 28 and the washer 27 are fixed.

【0013】図2(A),(B),(C)に、このよう
に構成された高電圧負荷開閉形ブッシングの雄形プラグ
挿入時の挙動についての説明図を示す。図2(A)にお
いて、先端部の消弧棒32および導体33から構成され
る雄形プラグ34は、まず上記ブッシング20の先端の
消弧子30内を通過して摺動導体24の先端部レセップ
31に当接する。レセップ31の内径は雄形プラグ34
の消弧棒32の外径よりも小さく形成されており、従っ
てレセップ31はある力以上で雄形プラグ34を挿入し
たときに内径が広がるようになっている径方向にばね力
を持った導体である。
2 (A), 2 (B) and 2 (C) are explanatory views of the behavior of the high voltage load switching type bushing constructed as described above when the male plug is inserted. In FIG. 2A, the male plug 34 composed of the arc extinguishing rod 32 and the conductor 33 at the tip first passes through the arc extinguishing element 30 at the tip of the bushing 20 and the tip of the sliding conductor 24. Abut the receipt 31. The inner diameter of the receive 31 is a male plug 34
Is formed smaller than the outer diameter of the arc-extinguishing rod 32, and therefore the receiving cap 31 has a radial inner diameter that expands when the male plug 34 is inserted with a certain force or more. Is.

【0014】次に、図2(A)の状態に差し込まれた雄
形プラグ34は、摺動導体24のレセップ31にぶつか
った後、そのまま摺動導体24をブッシング20の奥に
移動させ、やがて図2(B)の状態まで移動させる。こ
の図では摺動導体24のレセップ31の内側がガイド棒
26の先端部にぶつかった状態を示している。このと
き、導電性ハウジング23と雄形プラグ34の雄形プラ
グ導体33との電気的閃絡をストッパー29により防止
している。また、ばね28には摺動導体24を元の位置
に押し戻そうとする力が蓄積されている。雄形プラグ3
4を図2(B)の状態よりさらに奥に差し込もうとする
と、レセップ31の内側はガイド棒26の先端部により
拡げられることになる。このためレセップ31が拡げら
れることにより雄形プラグ34の外径との差が無くなっ
たと同時に摺動導体24はばね28に蓄積されていた力
により元に押し戻され、図2(C)の状態となる。元に
押し戻される途中でレセップ31と雄形プラグ34の雄
形プラグ導体33との間でアークが発生するが、押し戻
されて雄形プラグ34の雄形プラグ導体33との機械的
接触が果たされ、スピードが十分早いためにアークは瞬
時に消滅する。
Next, the male plug 34 inserted in the state shown in FIG. 2A collides with the recess 31 of the sliding conductor 24, and then the sliding conductor 24 is moved to the back of the bushing 20 as it is. It is moved to the state of FIG. 2 (B). This drawing shows a state where the inside of the receiving cap 31 of the sliding conductor 24 hits against the tip of the guide rod 26. At this time, the electrical flash between the conductive housing 23 and the male plug conductor 33 of the male plug 34 is prevented by the stopper 29. Further, the spring 28 stores a force for pushing the sliding conductor 24 back to its original position. Male plug 3
2 is further inserted than the state shown in FIG. 2B, the inside of the receipt 31 is expanded by the tip of the guide rod 26. For this reason, when the receiving cap 31 is expanded, the difference from the outer diameter of the male plug 34 disappears, and at the same time, the sliding conductor 24 is pushed back by the force accumulated in the spring 28, and the state shown in FIG. Become. An arc is generated between the receptacle 31 and the male plug conductor 33 of the male plug 34 in the middle of pushing back, but it is pushed back and mechanical contact with the male plug conductor 33 of the male plug 34 is achieved. The arc disappears instantly because the speed is fast enough.

【0015】次に、図3に基づいてこの発明の他の実施
例を説明する。上記例では、ガイド棒26を変圧器側に
固定したものであるが、この例は導電性ハウジング23
に固定したものである。即ち、変圧器側導体21の中央
部にまず導電性ハウジング23の左側端部が螺子などに
より固定される。この導電性ハウジング23の中央部に
も螺子穴が設けられており、そこにガイド棒26の左端
の螺子が螺合して固定するのである。従って、この場合
においてもガイド棒26は管状の導電性ハウジング23
との間にばね28を固定して、摺動導体24の移動を一
定にすることが可能となる。
Next, another embodiment of the present invention will be described with reference to FIG. In the above example, the guide rod 26 is fixed to the transformer side, but in this example, the conductive housing 23 is used.
It is fixed to. That is, the left end of the conductive housing 23 is first fixed to the center of the transformer-side conductor 21 with a screw or the like. A screw hole is also provided in the central portion of the conductive housing 23, and the screw at the left end of the guide rod 26 is screwed into and fixed to the screw hole. Therefore, in this case as well, the guide rod 26 has the tubular conductive housing 23.
It is possible to fix the spring 28 between them and to make the movement of the sliding conductor 24 constant.

【0016】[0016]

【発明の効果】以上説明したとおり、この発明の高電圧
負荷開閉型ブッシングによれば、ブッシング内で発生す
るアーク放電を最小限にとどめる事が可能となり、導電
性ハウジング内面の汚れによるハウジングと摺動導体の
接触子との電気的接触抵抗の増加の懸念が解消され、発
熱の危険を無くすことができる。また、摺動導体の摺動
特性も不変とすることができ、優れた高電圧負荷開閉型
ブッシングとなる。
As described above, according to the high voltage load switching type bushing of the present invention, it is possible to minimize the arc discharge generated in the bushing, and to prevent the inner surface of the conductive housing from sliding due to dirt on the housing. The concern about an increase in electrical contact resistance with the contact of the moving conductor is eliminated, and the danger of heat generation can be eliminated. In addition, the sliding characteristics of the sliding conductor can be made unchanged, resulting in an excellent high voltage load switching type bushing.

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

【図1】この発明の一実施例の高電圧負荷開閉型ブッシ
ングの構成を示す断面図、
FIG. 1 is a cross-sectional view showing the configuration of a high voltage load switching type bushing according to an embodiment of the present invention,

【図2】(A),(B),(C)は、図1の高電圧負荷
開閉型ブッシングに雄形プラグを差し込んだ状態を示す
断面図、
2 (A), (B) and (C) are cross-sectional views showing a state in which a male plug is inserted into the high voltage load switching type bushing of FIG. 1,

【図3】この発明の他の実施例の高電圧負荷開閉型ブッ
シングの構成を示す一部分の断面図、
FIG. 3 is a partial cross-sectional view showing the configuration of a high voltage load switching type bushing according to another embodiment of the present invention,

【図4】従来の高電圧負荷開閉型ブッシングの構成を示
す断面図、
FIG. 4 is a sectional view showing the structure of a conventional high-voltage load switching type bushing;

【図5】図5のブッシングに雄形雄形プラグを差し込ん
だ状態を示す断面図である。
5 is a sectional view showing a state where a male male plug is inserted in the bushing of FIG.

【符号の説明】[Explanation of symbols]

20 ブッシング 21 変圧器側導体 22 絶縁体 23 導電性ハウジング 24 摺動導体 25 接触子 26 ガイド棒 27 ワッシャ 28 ばね 29 ストッパー 30 消弧子 31 レセップ 32 消弧棒 33 導体 34 雄形プラグ 20 Bushing 21 Transformer-side conductor 22 Insulator 23 Conductive housing 24 Sliding conductor 25 Contactor 26 Guide rod 27 Washer 28 Spring 29 Stopper 30 Arc extinguisher 31 Resep 32 Arc extinguishing rod 33 Conductor 34 Male plug

───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 均 茨城県日立市日高町5丁目1番1号「日立 電線株式会社日高工場内」 (72)発明者 田沢 佐智夫 茨城県日立市日高町5丁目1番1号「日立 電線株式会社日高工場内」 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Kobayashi 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture “Hitachi Cable Co., Ltd. Hidaka Plant” (72) Inventor Sachio Tazawa, Hitachi City, Ibaraki Prefecture 5-1-1 Takamachi "Hitachi Cable Co., Ltd. Hidaka Factory"

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ブッシング内に変圧器側導体と接続され
る導電性ハウジングを備え、導電性ハウジング内にはハ
ウジング内面と電気的に導電状態で軸方向に動くことが
できる接触子を有し、かつ、ブッシング内に挿入される
雄形プラグ導体と雄雌形接続できるレセップを有する管
状ピストンを備えた高電圧負荷開閉形ブッシングにおい
て、導電性ハウジング内面に管状ピストンのレセップ内
面を押し広げるためのガイド棒および管状ピストンを移
動させるばねを具備し、管状ピストンの移動を機械的に
行なうことを特徴とする高電圧負荷開閉形ブッシング。
1. A bushing includes a conductive housing connected to a transformer-side conductor, and a contact inside the conductive housing which is movable in an axial direction in an electrically conductive state with the inner surface of the housing. Also, in a high-voltage load open / close type bushing equipped with a tubular piston having a receptacle capable of male-female connection with a male plug conductor inserted in the bushing, a guide for expanding the inner surface of the receptacle piston of the tubular piston to the inner surface of the conductive housing. A high-voltage load open / close type bushing comprising a rod and a spring for moving a tubular piston, and mechanically moving the tubular piston.
JP5800193A 1993-02-24 1993-02-24 High voltage load-break bushing Pending JPH06251825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5800193A JPH06251825A (en) 1993-02-24 1993-02-24 High voltage load-break bushing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5800193A JPH06251825A (en) 1993-02-24 1993-02-24 High voltage load-break bushing

Publications (1)

Publication Number Publication Date
JPH06251825A true JPH06251825A (en) 1994-09-09

Family

ID=13071759

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5800193A Pending JPH06251825A (en) 1993-02-24 1993-02-24 High voltage load-break bushing

Country Status (1)

Country Link
JP (1) JPH06251825A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003017198A (en) * 2001-07-02 2003-01-17 Honda Motor Co Ltd Service plug

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003017198A (en) * 2001-07-02 2003-01-17 Honda Motor Co Ltd Service plug

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