JP3371537B2 - Disconnector with resistance - Google Patents
Disconnector with resistanceInfo
- Publication number
- JP3371537B2 JP3371537B2 JP10679394A JP10679394A JP3371537B2 JP 3371537 B2 JP3371537 B2 JP 3371537B2 JP 10679394 A JP10679394 A JP 10679394A JP 10679394 A JP10679394 A JP 10679394A JP 3371537 B2 JP3371537 B2 JP 3371537B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- fixed
- insulating support
- support rod
- side electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】この発明はガス絶縁開閉装置を構
成する抵抗付き断路器に関する。
【０００２】
【従来の技術】図４は例えば特開昭５９−７３８１８号
公報に開示されたガス絶縁開閉装置の抵抗付き断路器を
示す断面図、図５は図４の抵抗ユニットの取り付け状態
の例を示す断面図である。図４において、１は円筒を組
み合わせた形状の金属容器、２は金属容器１の開口部を
密閉する絶縁スペーサ、３は金属容器１の内部に取り付
けた可動接触子、４は可動接触子３の摺動する可動側の
摺動接触子、５は摺動接触子４を装着した可動側電極、
６は可動接触子３の摺動する固定側の摺動接触子、７は
摺動接触子６を装着した固定側電極、８は固定側電極７
の回りに同心状に配置した複数の抵抗ユニット、９は抵
抗ユニット８を装着して導電接続する環状の中間シール
ドである。また、図５において、８０は中間シールド９
に一端を固定した絶縁支持棒、８１は絶縁支持棒８０に
同心状に嵌め入れた円筒状の抵抗体、８２は抵抗体８１
と抵抗体８１の間に挟んでその接続部分の電界を緩和す
る環状のシールド、８３は下端の抵抗体８１を受ける押
え板、８４は押え板８３に圧縮力を与えるとともに押え
板８３と固定側電極７とを導電接続するばねである。な
お、図示はしていないが、中間シールド９を絶縁支持物
で固定側電極７に固定しており、また、金属容器１には
絶縁消弧媒体のガスを充たしている。
【０００３】従来の抵抗付き断路器は以上のように構成
され、図４に示す閉極状態では可動側電極５、可動側の
摺動接触子４、可動接触子３、固定側の摺動接触子６、
固定側電極７の電路が形成される。この閉極状態から開
極状態に移ると可動接触子３は図の上方に移動し、可動
接触子３の下端部が中間シールド９から所定の絶縁距離
になる位置で停止して開極状態となる。この抵抗付き断
路器は負荷電流の開閉を行なわないが、無負荷の送電線
や母線の充電電流を開閉することがあり、その際再点弧
して急峻なサージ電圧を発生し、絶縁性能を脅かすこと
がある。このため、開閉途中に可動接触子３の下端部が
中間シールド９に接近すると、これらの間で再点弧させ
てこれに伴なうサージ電流を抵抗ユニット８の抵抗体８
１で抑制するようになっている。抵抗ユニット８はその
両端間に大きなサージ電圧が印加されるので長大にな
る。そのため製造可能な所定の長さの３つの抵抗体８１
をシールド８２を挟んで直列に配置し互に導電接続する
とともに、その接続部分の電界の緩和を行なう。また、
抵抗ユニット８は中間シールド９に固定した絶縁支持棒
８０に抵抗体８１とシールド８２を交互に同心状に嵌め
入れ、下端の抵抗体８１を押え板８３で受けてばね８４
で押し付け、温度の変化に対し伸縮自在の構造にしてい
る。
【０００４】
【発明が解決しようとする課題】従来の抵抗付き断路器
は以上のように構成され、中間シールド９に一端を固定
した絶縁支持棒８０に抵抗体８１とシールド８２を交互
に同心状に嵌め入れ、絶縁支持棒８０の他端を貫通させ
た押え板８３で下端の抵抗体８１を受けてばね８４で押
し付ける構造の抵抗ユニットになっている。ところで、
絶縁支持棒８０は所定の機械的強度を必要とするので径
をあまり小さくすることはできず、また、円筒状の抵抗
体８１の外径寸法許容差、中間シールド９、シールド８
２および押え板８３の抵抗体８１との嵌め合い寸法許容
差により組み立ての際に抵抗体８１が絶縁支持棒８０の
軸に直角方向に偏倚し、軸線がずれた状態になって（図
６参照）、抵抗体８０の内周面が絶縁支持棒８０に接触
し、絶縁支持棒８０と抵抗体８１と雰囲気のガスとの接
触点（図６にＴで示す）に電界が集中して絶縁耐力が低
下すると云う課題があった。
【０００５】この発明は上記のような課題を解決するた
めになされたもので、組み立ての際に抵抗体がその軸線
のずれた状態になっても抵抗体の内周面が絶縁支持棒に
接触せず、したがって、電界の集中が生じることもな
く、絶縁耐力が低下することのない抵抗ユニットを備え
た抵抗付き断路器を得ることを目的とする。
【０００６】
【課題を解決するための手段】この発明に係る抵抗付き
断路器は密閉して絶縁消弧媒体のガスを満たした金属容
器の内部に可動側電極と固定側電極とを対向させて配置
し、可動側電極の摺動接触子に摺動自在に装着した可動
接触子の直線運動により固定側電極の摺動接触子と離接
自在にして可動側電極と固定側電極との間の電路の開閉
を行なうとともに、直線運動の工程途中の近傍に環状の
中間シールドを設け、中間シールドと固定側電極との間
にこの両者を導電接続する抵抗ユニットを装着して可動
接触子と中間シールドとの間のアーク放電により生ずる
サージ電圧を抵抗ユニットで抑制するものにおいて、中
間シールドを絶縁支持物で固定側電極に固定するととも
に、中間シールドに一端を固定した絶縁支持棒に円筒状
で所定の長さの複数の抵抗体をその間に電界を緩和する
環状のシールドを挟んで差し入れ、終端の抵抗体を絶縁
支持棒の他端を貫通させた押え板で受けて固定側電極で
支持したばねで押し付け、抵抗体とシールドと押え板と
がそれぞれの寸法許容差と配置とにより絶縁支持棒の軸
に直角方向に偏倚する偏倚量に対応して絶縁支持棒の径
を小さくした抵抗ユニットを備えたものである。
【０００７】
【作用】この発明においける抵抗ユニットは抵抗体とシ
ールドと押え板とがそれぞれの寸法許容差と配置とによ
り絶縁支持棒の軸に直角方向に偏倚する偏倚量に対応し
て絶縁支持棒の径を小さくする。
【０００８】
【実施例】
実施例１．以下、この発明の実施例１を図に基づいて説
明する。図１はその実施例１の抵抗ユニットの取り付け
状態を示す断面図であり、７、９、８１〜８４は従来の
技術の図５で説明したものと同じものである。１８０は
中間シールド９に固定した一端から押え板８３を貫通す
る他端へ段階的に径を小さくした絶縁支持棒、１８０
ａ、１８０ｂ、１８０ｃはそれぞれ絶縁支持棒１８０の
大径部、中径部、小径部である。また図２は抵抗体８１
の外径寸法許容差、中間シールド９、シールド８２およ
び押え板８３の抵抗体８１との嵌め合い寸法許容差によ
り組み立ての際に抵抗体８１の軸線がずれた抵抗ユニッ
トの取り付け状態を示す断面図である。
【０００９】実施例１は以上のように構成されており、
中間シールド９に一端を固定した絶縁支持棒１８０に円
筒状の抵抗体８１と環状のシールド８２を交互に同心状
に嵌め入れ、下端の抵抗体８１を絶縁支持棒１８０の他
端を貫通させた押え板８３で受けてばね８４で押し付
け、温度の変化に対して伸縮自在の構造になっている。
したがって、抵抗体８１の外形寸法許容差、中間シール
ド９、中間シールド８２および押え板８３の抵抗体８１
との嵌め合い寸法許容差により組み立ての際に下の抵抗
体８１ほど絶縁支持棒１８０の軸に直角方向に偏倚する
偏倚量が大きくなる可能性があり、上から下へ３つの抵
抗体８１がそれぞれ対応する絶縁支持棒１８０の各部分
の径を段階的に小さくして大径部１８０ａ、中径部１８
０ｂ、小径部１８０ｃとしている。これにより組み立て
の際に抵抗体８１とシールド８２と押え板８３とが絶縁
支持棒１８０の軸に直角方向に偏倚しても、抵抗体８１
の内周面が絶縁支持棒１８０に接触することはなく（図
２参照）電界の集中する絶縁支持棒１８０と抵抗体８１
と雰囲気のガスとの接触点も生じない。また、絶縁支持
棒１８０は大径部１８０ａで中間シールド９に固定する
ので、機械的強度を損うことがない。なお、抵抗ユニッ
ト以外の部分については従来の抵抗付き断路器と同じで
あるので説明を省略する。
【００１０】実施例２．図３はこの発明の実施例２の抵
抗ユニットの取り付け状態を示す断面図であり、９、８
１〜８４については従来の技術の図５ですでに説明し
た。７０は押え板８３のガイド部７０ａを設けた固定側
電極、２８０は中間シールド９に固定する一端側と押え
板８３を貫通させる他端側の径を大きくして大径部２８
０ａにし、その間の径を小さくして小径部２８０ｂにし
た絶縁支持棒である。
【００１１】実施例２は以上のように構成されており、
中間シールド９に一端を固定した絶縁支持棒２８０に円
筒形状の抵抗体８１と環状のシールド８２を交互に同心
状に嵌め入れ、絶縁支持棒２８０の他端を貫通させると
ともに固定側電極７０のガイド部７０ａでガイドした押
え板８３により下端の抵抗体８１を受けてばね８４で押
し付ける構造になっている。押え板８３を固定側電極７
０のガイド部７０ａでガイドするので押え板８３が絶縁
支持棒２８０の軸に直角方向に偏倚することはなく、し
たがって、抵抗体８１の外形寸法許容差、中間シールド
９、シールド８２および押え板８３の抵抗体８１との嵌
め合い寸法許容差により組み立ての際に中央の抵抗体８
１が絶縁支持棒１８０の軸に直角方向にもっとも大きく
偏倚するので、絶縁支持棒２８０で中央の抵抗体８１の
対応する部分の径を小さくして小径部２８０ｂにしてい
る。この実施例２によっても実施例１と同様の効果を得
ることができる。
【００１２】
【発明の効果】以上説明したとおり、この発明によれば
中間シールドを絶縁支持物で固定側電極に固定するとと
もに、中間シールドに一端を固定した絶縁支持棒に円筒
状で所定の長さの複数の抵抗体をその間に電界を緩和す
る環状のシールドを挟んで差し入れ、終端の抵抗体を絶
縁支持棒の他端を貫通させた押え板で受けて固定側電極
で支持したばねで押し付け、抵抗体とシールドと押え板
とがそれぞれの寸法許容差と配置とにより絶縁支持棒の
軸に直角方向に偏倚する偏倚量に対応して絶縁支持棒の
径を小さくした抵抗ユニットを備えるので、組み立ての
際に抵抗体がその軸線のずれた状態になっても抵抗体の
内周面が絶縁支持棒に接触せず、したがって、電界の集
中が生じることもなく、絶縁耐力が低下することがな
い。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disconnector with a resistor constituting a gas-insulated switchgear. 2. Description of the Related Art FIG. 4 is a sectional view showing a disconnector with a resistor of a gas insulated switchgear disclosed in, for example, Japanese Patent Application Laid-Open No. Sho 59-73818, and FIG. It is sectional drawing which shows an example. In FIG. 4, reference numeral 1 denotes a metal container having a combination of cylinders, 2 denotes an insulating spacer for sealing an opening of the metal container 1, 3 denotes a movable contact mounted inside the metal container 1, and 4 denotes a movable contact 3. A sliding contact 5 on the movable side that slides, a movable electrode 5 on which the sliding contact 4 is mounted,
6 is a fixed-side sliding contact on which the movable contact 3 slides, 7 is a fixed-side electrode on which the sliding contact 6 is mounted, and 8 is a fixed-side electrode 7
A plurality of resistance units 9 are arranged concentrically around the ring, and 9 is an annular intermediate shield to which the resistance unit 8 is mounted and electrically connected. In FIG. 5, reference numeral 80 denotes the intermediate shield 9.
, A cylindrical resistor 81 concentrically fitted into the insulating support rod 80, and a resistor 81.
An annular shield sandwiched between the resistor 81 and the resistor 81 to relieve the electric field at the connection portion; 83, a presser plate for receiving the resistor 81 at the lower end; 84, a compressive force applied to the presser plate 83; This is a spring for conductively connecting the electrode 7. Although not shown, the intermediate shield 9 is fixed to the fixed electrode 7 with an insulating support, and the metal container 1 is filled with an insulating arc-extinguishing medium gas. A conventional disconnector with a resistor is constructed as described above. In the closed state shown in FIG. 4, the movable electrode 5, the movable sliding contact 4, the movable contact 3, and the fixed sliding contact are provided. Child 6,
An electric path for the fixed electrode 7 is formed. When the movable contact 3 moves from the closed state to the open state, the movable contact 3 moves upward in the drawing, and stops at a position where the lower end of the movable contact 3 is at a predetermined insulating distance from the intermediate shield 9 to change to the open state. Become. Although this disconnector with a resistor does not open and close the load current, it may open and close the charging current of a no-load transmission line or bus, causing re-ignition and generating a steep surge voltage, thereby improving insulation performance. May be threatening. Therefore, when the lower end of the movable contact 3 approaches the intermediate shield 9 during the opening and closing, the movable contact 3 is re-ignited between them and a surge current accompanying this is caused by the resistor 8 of the resistance unit 8.
The number is controlled by 1. The resistance unit 8 is long because a large surge voltage is applied between both ends thereof. Therefore, three resistors 81 of a predetermined length that can be manufactured
Are arranged in series with a shield 82 interposed therebetween, and are electrically conductively connected to each other. Also,
In the resistance unit 8, the resistors 81 and the shields 82 are alternately and concentrically fitted into an insulating support rod 80 fixed to the intermediate shield 9, and the lower end of the resistor 81 is received by the holding plate 83, and a spring 84 is received.
To make it expandable and contractable against changes in temperature. A conventional disconnector with a resistor is constructed as described above. A resistor 81 and a shield 82 are alternately and concentrically mounted on an insulating support rod 80 having one end fixed to an intermediate shield 9. The resistance unit has a structure in which a resistance plate 81 at the lower end is received by a pressing plate 83 through which the other end of the insulating support rod 80 penetrates, and pressed by a spring 84. by the way,
Since the insulating support rod 80 requires a predetermined mechanical strength, its diameter cannot be reduced so much. In addition, the tolerance of the outer diameter of the cylindrical resistor 81, the intermediate shield 9, and the shield 8
2 and the presser plate 83 are displaced in the direction perpendicular to the axis of the insulating support rod 80 during assembly due to the tolerance of the fitting dimensions of the presser plate 83 and the resistor 81, and the axis is shifted (see FIG. 6). ), The inner peripheral surface of the resistor 80 contacts the insulating support rod 80, and the electric field is concentrated at the contact point (indicated by T in FIG. 6) between the insulating support rod 80, the resistor 81, and the gas in the atmosphere, and the dielectric strength is increased. However, there is a problem that is reduced. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and the inner peripheral surface of the resistor contacts the insulating support rod even when the resistor is displaced from its axis during assembly. Therefore, an object of the present invention is to obtain a disconnector with a resistance provided with a resistance unit that does not cause a concentration of an electric field and does not lower the dielectric strength. SUMMARY OF THE INVENTION A disconnector with a resistor according to the present invention has a movable side electrode and a fixed side electrode opposed to each other inside a hermetically sealed metal container filled with an insulating arc-extinguishing medium gas. The movable contact, which is arranged and slidably mounted on the sliding contact of the movable electrode, can be freely separated from and brought into contact with the sliding contact of the fixed electrode by the linear motion of the movable contact. In addition to opening and closing the electric circuit, an annular intermediate shield is provided near the middle of the linear motion process, and a resistance unit that electrically connects the two is installed between the intermediate shield and the fixed side electrode. The surge voltage caused by the arc discharge between them is suppressed by a resistance unit. In this case, the intermediate shield is fixed to the fixed-side electrode with an insulating support and a cylindrical support is fixed to one end of the intermediate shield. A plurality of resistors of a fixed length were inserted with a ring-shaped shield interposed between them to reduce the electric field, and the terminating resistor was received by a holding plate that penetrated the other end of the insulating support rod, and was supported by fixed electrodes. A resistance unit in which the diameter of the insulating support rod is reduced in accordance with the amount of displacement of the resistor, shield, and presser plate in the direction perpendicular to the axis of the insulating support rod by their respective dimensional tolerances and arrangements by pressing with a spring. It is provided. According to the resistance unit of the present invention, the resistor, the shield, and the holding plate are insulated in accordance with the amount of deviation that is deviated in the direction perpendicular to the axis of the insulating support rod due to the respective dimensional tolerance and arrangement. Reduce the diameter of the support rod. Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a mounted state of a resistance unit according to the first embodiment. Reference numerals 7, 9, 81 to 84 are the same as those described with reference to FIG. 180 is an insulating support rod whose diameter is reduced stepwise from one end fixed to the intermediate shield 9 to the other end penetrating the holding plate 83;
Reference numerals a, 180b, and 180c denote a large diameter portion, a medium diameter portion, and a small diameter portion of the insulating support bar 180, respectively. FIG. 2 shows a resistor 81.
Cross-sectional view showing the mounting state of the resistance unit in which the axis of the resistor 81 is displaced during assembly due to the tolerance of the outer diameter of the resistor 81 and the tolerance of the fitting of the intermediate shield 9, the shield 82 and the holding plate 83 with the resistor 81. It is. Embodiment 1 is configured as described above.
Cylindrical resistors 81 and annular shields 82 were alternately and concentrically fitted into an insulating support bar 180 having one end fixed to the intermediate shield 9, and the lower end resistor 81 was passed through the other end of the insulating support bar 180. It is received by the holding plate 83 and pressed by a spring 84, and has a structure that can be expanded and contracted with respect to a change in temperature.
Therefore, the outer dimension tolerance of the resistor 81, the resistance of the intermediate shield 9, the intermediate shield 82 and the holding plate 83
During assembly, there is a possibility that the lower the resistor 81 is, the larger the amount of deviation that is deviated in the direction perpendicular to the axis of the insulating support rod 180 during assembly is. The diameters of the corresponding portions of the insulating support rod 180 are gradually reduced so that the large-diameter portion 180a and the medium-diameter portion 18
0b and a small diameter portion 180c. Accordingly, even if the resistor 81, the shield 82, and the holding plate 83 are displaced in a direction perpendicular to the axis of the insulating support rod 180 during assembly, the resistor 81
The inner peripheral surface does not contact the insulating support rod 180 (see FIG. 2), and the insulating support rod 180 and the resistor 81 where the electric field is concentrated
There is no contact point between the gas and the atmosphere. Further, since the insulating support rod 180 is fixed to the intermediate shield 9 at the large diameter portion 180a, the mechanical strength is not impaired. Note that portions other than the resistance unit are the same as those of the conventional disconnector with a resistor, and a description thereof will be omitted. Embodiment 2 FIG. FIG. 3 is a sectional view showing a mounted state of a resistance unit according to Embodiment 2 of the present invention.
1 to 84 have already been described with reference to FIG. 70 is a fixed-side electrode provided with a guide portion 70a of the holding plate 83, and 280 is a large-diameter portion 28 in which the diameter of one end fixed to the intermediate shield 9 and the other end through which the holding plate 83 is penetrated are increased.
This is an insulating support rod having a small diameter portion 280b by reducing the diameter to 0a. Embodiment 2 is configured as described above.
Cylindrical resistors 81 and annular shields 82 are alternately and concentrically fitted into an insulating support bar 280 having one end fixed to the intermediate shield 9, and the other end of the insulating support bar 280 is penetrated and a guide for the fixed electrode 70 is provided. The structure is such that the resistor 81 at the lower end is received by the pressing plate 83 guided by the portion 70a and pressed by the spring 84. Hold down plate 83 to fixed electrode 7
The guide plate 70a guides the holding plate 83 so as not to be displaced in a direction perpendicular to the axis of the insulating support rod 280. Therefore, the tolerance of the external dimensions of the resistor 81, the intermediate shield 9, the shield 82 and the holding plate 83 Due to the dimensional tolerance of fitting with the resistor 81, the central resistor 8
1 is most greatly deviated in the direction perpendicular to the axis of the insulating support rod 180, the diameter of the corresponding portion of the central resistor 81 of the insulating support rod 280 is reduced to a small diameter portion 280b. According to the second embodiment, the same effect as that of the first embodiment can be obtained. As described above, according to the present invention, the intermediate shield is fixed to the fixed-side electrode by the insulating support, and the insulating shield is fixed to the intermediate shield at one end by the cylindrical support rod. A plurality of resistors are inserted with a ring-shaped shield interposed between them to reduce the electric field, and the terminating resistor is received by a holding plate penetrating the other end of the insulating support rod and pressed by a spring supported by the fixed electrode. Since the resistor, the shield, and the holding plate are provided with a resistance unit in which the diameter of the insulating support rod is reduced in accordance with the amount of deviation in the direction perpendicular to the axis of the insulating support rod due to the respective dimensional tolerance and arrangement, Even when the resistor is displaced from its axis during assembly, the inner peripheral surface of the resistor does not come into contact with the insulating support rod, and therefore, no electric field concentration occurs, and the dielectric strength may be reduced. Absent.
【図面の簡単な説明】
【図１】この発明の実施例１の抵抗ユニットの取り付け
状態を示す断面図である。
【図２】抵抗体の軸線がずれた抵抗ユニットの取り付け
状態を示す断面図である。
【図３】この発明の実施例２の抵抗ユニットの取り付け
状態を示す断面図である。
【図４】従来の抵抗付き断路器を示す断面図である。
【図５】図４の抵抗ユニットの取り付け状態を示す断面
図である。
【図６】抵抗体の軸線がずれた抵抗ユニットの取り付け
状態を示す断面図である。
【符号の説明】
７ 固定側電極
９ 中間シールド
８１ 抵抗体
８２ シールド
８３ 押え板
８４ ばね
１８０ 絶縁支持棒
１８０ａ 大径部
１８０ｂ 中径部
１８０ｃ 小径部
７０ 固定側電極
７０ａ ガイド部
２８０ 絶縁支持棒
２８０ａ 大径部
２８０ｂ 小径部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a mounted state of a resistance unit according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view showing a mounted state of a resistance unit in which an axis of a resistor is shifted. FIG. 3 is a cross-sectional view illustrating a mounted state of a resistance unit according to Embodiment 2 of the present invention. FIG. 4 is a sectional view showing a conventional disconnector with a resistor. FIG. 5 is a cross-sectional view illustrating a mounting state of the resistance unit of FIG. 4; FIG. 6 is a cross-sectional view showing a mounted state of the resistance unit in which the axis of the resistor is shifted. [Description of Signs] 7 Fixed-side electrode 9 Intermediate shield 81 Resistor 82 Shield 83 Presser plate 84 Spring 180 Insulation support rod 180a Large diameter section 180b Medium diameter section 180c Small diameter section 70 Fixed side electrode 70a Guide section 280 Insulation support rod 280a Large Diameter part 280b Small diameter part
フロントページの続き (56)参考文献 特開 昭57−132620（ＪＰ，Ａ) 特開 昭59−73818（ＪＰ，Ａ) 特開 昭58−165221（ＪＰ，Ａ) 特開 平５−334943（ＪＰ，Ａ) 特開 昭61−58121（ＪＰ，Ａ) 特開 平５−290693（ＪＰ，Ａ) 特開 平６−20561（ＪＰ，Ａ) 特開 平６−342618（ＪＰ，Ａ) 特開 平７−21880（ＪＰ，Ａ) 実開 昭57−2529（ＪＰ，Ｕ) 実開 昭57−48532（ＪＰ，Ｕ) 実開 昭59−39903（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01H 33/16 H01H 33/64 Continuation of front page (56) References JP-A-57-132620 (JP, A) JP-A-59-73818 (JP, A) JP-A-58-165221 (JP, A) JP-A-5-334943 (JP) JP-A-61-58121 (JP, A) JP-A-5-290693 (JP, A) JP-A-6-20561 (JP, A) JP-A-6-342618 (JP, A) 7-21880 (JP, A) Japanese Utility Model Showa 57-2529 (JP, U) Japanese Utility Model Showa 57-48532 (JP, U) Japanese Utility Model Showa 59-39903 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) H01H 33/16 H01H 33/64
Claims (1)
金属容器の内部に可動側電極と固定側電極とを対向させ
て配置し、前記可動側電極の接触子に摺動自在に装着し
た可動接触子の直線運動により前記固定側電極の摺動接
触子と離接自在にして前記可動側電極と前記固定側電極
との間の電路の開閉を行なうとともに、前記直線運動の
工程途中の近傍に環状の中間シールドを設け、前記中間
シールドと前記固定側電極との間にこの両者を導電接続
する抵抗ユニットを装着して前記可動接触子と前記中間
シールドとの間のアーク放電により生ずるサージ電圧を
前記抵抗ユニットで抑制する抵抗付き断路器において、
前記中間シールドを絶縁支持物で前記固定側電極に固定
するとともに、前記中間シールドに一端を固定した絶縁
支持棒に円筒状で所定の長さの複数の抵抗体をその間に
電界を緩和する環状のシールドを挟んで差し入れ、終端
の前記抵抗体を前記絶縁支持棒の他端を貫通させた押え
板で受けて前記固定側電極で支持したばねで押し付け、
前記抵抗体と前記シールドと前記押え板とがそれぞれの
寸法許容差と配置とにより前記絶縁支持棒の軸に直角方
向に偏倚する偏倚量に対応して前記絶縁支持棒の径を小
さくした前記抵抗ユニットを備えたことを特徴とする抵
抗付き断路器。(57) [Claim 1] A movable side electrode and a fixed side electrode are arranged inside a metal container which is sealed and filled with a gas of an insulating arc-extinguishing medium, facing the movable side electrode. The contact between the movable contact and the fixed electrode is opened and closed by the linear movement of the movable contact slidably mounted on the contact of the fixed electrode and by the linear movement of the movable contact. In addition, an annular intermediate shield is provided near the middle of the linear motion process, and a resistance unit for electrically connecting the intermediate shield and the fixed side electrode is mounted between the intermediate shield and the fixed-side electrode. A resistor disconnecting switch for suppressing a surge voltage caused by arc discharge between the resistor unit and
The intermediate shield is fixed to the fixed side electrode with an insulating support, and a plurality of resistors having a cylindrical shape and a predetermined length are formed on an insulating support rod having one end fixed to the intermediate shield. Insert the shield with sandwiching, receive the resistor at the end with a holding plate penetrating the other end of the insulating support rod and press with the spring supported by the fixed side electrode,
The resistor, wherein the diameter of the insulating support rod is reduced in accordance with the amount of deviation of the resistor, the shield, and the holding plate in the direction perpendicular to the axis of the insulating support rod due to their respective dimensional tolerances and arrangements. A disconnector with a resistor, comprising a unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10679394A JP3371537B2 (en) | 1994-05-20 | 1994-05-20 | Disconnector with resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10679394A JP3371537B2 (en) | 1994-05-20 | 1994-05-20 | Disconnector with resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07320600A JPH07320600A (en) | 1995-12-08 |
| JP3371537B2 true JP3371537B2 (en) | 2003-01-27 |
Family
ID=14442777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10679394A Expired - Fee Related JP3371537B2 (en) | 1994-05-20 | 1994-05-20 | Disconnector with resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3371537B2 (en) |
-
1994
- 1994-05-20 JP JP10679394A patent/JP3371537B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07320600A (en) | 1995-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |