JPH02117084A - Separating device - Google Patents
Separating deviceInfo
- Publication number
- JPH02117084A JPH02117084A JP27010088A JP27010088A JPH02117084A JP H02117084 A JPH02117084 A JP H02117084A JP 27010088 A JP27010088 A JP 27010088A JP 27010088 A JP27010088 A JP 27010088A JP H02117084 A JPH02117084 A JP H02117084A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- extinguishing resin
- conductive plastic
- resin
- extinguishing
- 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
Links
- 229920005989 resin Polymers 0.000 claims abstract description 36
- 239000011347 resin Substances 0.000 claims abstract description 36
- 239000000155 melt Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000004927 fusion Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 18
- 239000007789 gas Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920005177 Duracon® POM Polymers 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Adjustable Resistors (AREA)
- Thermistors And Varistors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電気回路の切り離し装置に関し、特に避雷器が
雷撃等により特性劣化して、洩れ電流が大きくなったり
雷サージ到来後の続流を遮断できなくなったときに、避
雷器を接地回路から切り離して電力系統回路の地絡異常
を防止する避雷器の切り離し装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electrical circuit disconnection device, and in particular, the present invention relates to a device for disconnecting electrical circuits, and in particular, the present invention relates to a device for disconnecting electrical circuits, and in particular, when a lightning arrester has characteristics deteriorated due to a lightning strike, etc., leakage current increases or the following current is interrupted after a lightning surge arrives. The present invention relates to a lightning arrester disconnecting device that disconnects the lightning arrester from the grounding circuit to prevent ground fault abnormalities in the power system circuit when the lightning arrester becomes disabled.
配電線等の充電部と大地との間に接続され、雷サージ等
の異常電圧から電気設備を保護する避雷器は、一般に、
雷サージ等の高電圧印加時に低抵抗となり、配電線の通
常の対地電圧は完全に遮断するという電圧−電流特性を
持つ素子、例えばＺｎＯを特性要素として用いる。Surge arresters are generally connected between live parts such as distribution lines and the ground to protect electrical equipment from abnormal voltages such as lightning surges.
An element having voltage-current characteristics such as ZnO, which has a low resistance when high voltage is applied such as a lightning surge and completely cuts off the normal ground voltage of a distribution line, is used as a characteristic element.
しかしこの特性要素は、多回数の雷サージを受けたり定
格を大きく上回るサージを受けると、上記電圧−電流特
性がどうしても劣化する。However, when this characteristic element is subjected to many lightning surges or a surge that greatly exceeds the rating, the voltage-current characteristics inevitably deteriorate.
この劣化によって、徐々に洩れ電流が大きくなり、また
雷サージ吸収動作時のエネルギーが過大となれば素子は
発熱し始め、熱暴走によりついには短絡破壊を起こして
地絡事故が生じる。すると′ａ雷器が接続されている回
路の地絡リレー等を作動させ電力系統に大きな影響を与
える。Due to this deterioration, the leakage current gradually increases, and if the energy during the lightning surge absorption operation becomes excessive, the element begins to generate heat, and thermal runaway eventually causes short-circuit breakdown and a ground fault. This will activate the ground fault relays in the circuits to which the 'a' lightning device is connected, which will have a major impact on the power system.
そこで、本出願人はこれを防止するため、第４図に示す
ような切り離し装置（１）を提案しく特開昭６２−２０
８５８１号）、第５図または第６図に示すように避雷器
（２）とともに配電線等の充電部（３）と大地（４）間
に接続するようにした。Therefore, in order to prevent this, the present applicant proposed a separating device (1) as shown in FIG.
No. 8581), as shown in Fig. 5 or 6, it was connected together with a lightning arrester (2) between a live part (3) such as a power distribution line and the ground (4).
この切り離し装置（１）は、所定値に温度上昇したとき
溶け、且つ発熱抵抗体として機能するように導電率を選
定した導電性プラスチック（５）を端子保持体として用
い、この両端に固定した一対の金属端子（６）（６）間
に、放電ギャップＧを形成している。This disconnection device (1) uses a conductive plastic (5) whose conductivity is selected so that it melts when the temperature rises to a predetermined value and functions as a heating resistor as a terminal holder, and a pair of wires fixed at both ends of the terminal holder. A discharge gap G is formed between the metal terminals (6) (6).
この切り離し装置（１）は、避雷器（２）が劣化して洩
れ電流が多くなった場合及び避雷器が短絡破壊した場合
には、自己発熱により溶断して、上下の金属端子（６）
（６）を分離し、避雷器（２）を接地回路から切り離す
。このような動作によって電力系統回路への地絡異常を
防止する。This disconnection device (1) will melt due to self-heating when the surge arrester (2) deteriorates and leakage current increases, or when the surge arrester is short-circuited and destroyed, and the upper and lower metal terminals (6)
(6) and disconnect the lightning arrester (2) from the ground circuit. Such an operation prevents a ground fault to the power system circuit.
しかしこの切り離し装置（１）は、避雷器（２）の劣化
等で導電性プラスチック（５）が溶断した際に、この溶
断点に発生するアークが消弧し難い問題があった。配電
線等の充電部（３）の対地電圧は数千ボルトと高いため
、消弧には溶断した導電性プラスチックの切断端同士が
、例えば３０ｃｍ以上離れる必要がある一方で、分離し
た金属端子（６）（６）は、それに接続された太い電線
によって支持され自重によっては通常少しの距離しか離
れないからである。However, this disconnection device (1) has a problem in that when the conductive plastic (5) is fused due to deterioration of the lightning arrester (2) or the like, the arc generated at the fusion point is difficult to extinguish. The ground voltage of live parts (3) such as distribution lines is as high as several thousand volts, so in order to extinguish the arc, the cut ends of the fused conductive plastic must be separated by, for example, 30 cm or more, while separated metal terminals ( 6) (6) is because it is supported by thick electric wires connected to it and is usually only a short distance away depending on its own weight.
このように続流が切れないと変電所で復帰動作をする必
要があり、切り離し装置（１）を用いる意味がなくなる
。If the following current is not cut off in this way, it is necessary to carry out a recovery operation at the substation, and there is no point in using the disconnection device (1).
そこで、本出願人は導電性プラスチックが避雷器の不良
によって溶断して金属端子を分離したとき続流を確実に
遮断できる第７図に示すような切り離し装置（７）を発
明した。Therefore, the present applicant has invented a disconnection device (7) as shown in FIG. 7 that can reliably interrupt the following current when the conductive plastic fuses and separates the metal terminal due to a faulty lightning arrester.
第７図において、（８）は全長に亘って雄ネジを形成し
た棒状の導電性プラスチックで、所定値に温度上昇した
とき熔け、且つ発熱抵抗体として機能するように導電率
を選定されている。この導電性プラスチック（８）は、
例えば金属あるいは黒鉛等の導体粉末を混入した合成樹
脂により作られている。 （１０） （１０）は導
電性プラスチックの両端に固定した棒状の金属端子で、
上側の金属端子（１０）は内端に雌ネジ、外端に雄ネジ
を形成している。また下側の金属端子（ｌＯ）は、両端
共に雌ネジを形成している。In Figure 7, (8) is a rod-shaped conductive plastic with a male thread formed over its entire length, and its conductivity is selected so that it melts when the temperature rises to a predetermined value and functions as a heating resistor. . This conductive plastic (8) is
For example, it is made of metal or synthetic resin mixed with conductor powder such as graphite. (10) (10) is a rod-shaped metal terminal fixed to both ends of the conductive plastic.
The upper metal terminal (10) has a female thread at its inner end and a male thread at its outer end. Further, both ends of the lower metal terminal (lO) form female threads.
（１１） （１１）は断面ハツト形状の第１の消弧性
樹脂で、各金泥端子（１０） （１０）の内端を囲む
ように成形されている。第１の消弧性樹脂（１１）（１
１）の素材としてはジュラコン、ユリア樹脂等の加熱す
るとＨ２等の消弧性ガスを発生するものが使用される。(11) (11) is a first arc-extinguishing resin having a hat-shaped cross section, and is molded to surround the inner end of each gold-plated terminal (10) (10). First arc-extinguishing resin (11) (1
As the material for 1), a material that generates arc-extinguishing gas such as H2 when heated, such as Duracon or urea resin, is used.
（１２）は円筒状の第２の消弧性樹脂で、頂面部分
を向かい合わせて配室される第１の消弧性樹脂（１１）
（１１）の外周に滑動自在に嵌められる。この素材
は第１の消弧性樹脂（１１）と同様である。(12) is a cylindrical second arc-extinguishing resin, and the first arc-extinguishing resin (11) is arranged with its top surface facing each other.
It is slidably fitted onto the outer periphery of (11). This material is the same as the first arc-extinguishing resin (11).
この発明はＭ雷器が劣化又は短絡破壊すると自己発熱に
より導電性プラスチック（８）が急速に溶断して、金属
端子を切り離す。この溶断時に発生する高温ガスは消弧
性樹脂によって囲まれて、内圧を急上昇させる。さらに
この高温ガスが消弧性樹脂の表面に作用して水素等を発
生させる。この内圧の上昇と水素等の発生の相乗作用に
より、溶断点におけるアークは急速に消滅する。In this invention, when the M lightning device deteriorates or breaks down due to short circuit, the conductive plastic (8) rapidly melts due to self-heating, and the metal terminal is cut off. The high-temperature gas generated during this melting is surrounded by the arc-extinguishing resin, causing the internal pressure to rise rapidly. Furthermore, this high-temperature gas acts on the surface of the arc-extinguishing resin to generate hydrogen and the like. Due to the synergistic effect of this increase in internal pressure and the generation of hydrogen, etc., the arc at the melting point is quickly extinguished.
上記切り離し装置（７）は、導電性プラスチック（８）
の両端のネジ部を、金属端子（１０）（１０）に螺合さ
せる構造のため、この部分の接触抵抗が比較的大きくか
つ製作の条件で変動し易いため、一定の性能を得難い問
題があった。The above separation device (7) is a conductive plastic (8)
Since the screw parts at both ends of the metal terminal (10) are screwed into the metal terminals (10), the contact resistance at this part is relatively large and easily fluctuates depending on the manufacturing conditions, making it difficult to obtain consistent performance. Ta.
また導電性プラスチック（８）を、外部電線との接線用
の引出金具に接続するために、金属端子（１０） （
１０）を別に製作する必要がありコスト高となる問題も
あった。In addition, in order to connect the conductive plastic (8) to a pull-out fitting for tangent to an external electric wire, a metal terminal (10) (
10) needs to be manufactured separately, resulting in a problem of high cost.
そこで、本発明は、導電性プラスチック自体に、この金
属端子の機能を持たせ、この導電性プラスチックに直接
、引出金具あるいは避雷器等の接続用電線を接続できる
構造を提供することを目的とする。Therefore, an object of the present invention is to provide a structure in which a conductive plastic itself has the function of a metal terminal, and a connecting wire such as a lead-out fitting or a lightning arrester can be directly connected to the conductive plastic.
本発明は、所定値に温度上昇したとき熔け、且つ発熱抵
抗体として機能するように導電率を選定し、両端に中間
部より大径のネジ部を形成した棒状の導電性プラスチッ
クと、
上記導電性プラスチックの外周面に、上記ネジ部を突出
させかつ中間を分離してモールド固着した第１の消弧性
樹脂と、
上記第１の消弧性樹脂にスライド自在に外嵌した筒状の
第２の消弧性樹脂とを備えることを特徴とする切り離し
装置を開示する。The present invention provides a rod-shaped conductive plastic whose conductivity is selected so that it melts when the temperature rises to a predetermined value and functions as a heat-generating resistor, and which has threaded portions with a larger diameter than the middle portion at both ends; a first arc-extinguishing resin with the threaded portion protruding from the outer circumferential surface of the plastic and molded with the intermediate portion separated; and a cylindrical resin that is slidably fitted onto the first arc-extinguishing resin. Disclosed is a disconnection device characterized by comprising: 2 arc-extinguishing resin.
上記導電性プラスチックは、両端の大径部にネジ部が形
成され、金属端子が不用となる。またこのネジ部は大径
であるので、ここに接続される接続用導体との接触抵抗
が小さく、安定した性能の切り離し装置が提供できる。The above-mentioned conductive plastic has threaded portions formed in the large diameter portions at both ends, eliminating the need for metal terminals. Further, since this threaded portion has a large diameter, the contact resistance with the connecting conductor connected thereto is small, and a disconnecting device with stable performance can be provided.
さらに製作は第１の消弧性樹脂をモールド整形し、第２
の消弧性樹脂を嵌めるだけでよく工数が大幅に削減でき
る。Furthermore, the production involves molding the first arc-extinguishing resin, and shaping the second arc-extinguishing resin.
Simply fitting the arc-extinguishing resin will greatly reduce the number of man-hours required.
本発明を一実施例について説明する。 The present invention will be described with reference to one embodiment.
第１図に示す切り離し装Ｗ（２０）において、（２１）
は所定値に温度上昇したとき溶け、且つ発熱抵抗体とし
て機能するように導電率を選定された導電性プラスチッ
クで、中間外周に環状溝（２１ａ ）が形成され、両端
が大径部（２２）（２２）となっている。この大径部（
２２）にはフランジ（２２ａ）が形成され、その端部は
雄ネジ（２３） （２３）が形成されている。この導
電性プラスチック（２１）は、例えば金属あるいは黒鉛
等の導体粉末を混入した合成樹脂により作られ、引出金
具等との接触抵抗を小さくするため雄ネジ（２３）の表
面に金属メツキを施すことが好ましい。In the detachment W (20) shown in FIG. 1, (21)
is a conductive plastic whose conductivity is selected so that it melts when the temperature rises to a predetermined value and functions as a heating resistor, and has an annular groove (21a) formed on the middle outer periphery, and a large diameter portion (22) at both ends. (22). This large diameter part (
22) is formed with a flange (22a), the end of which is formed with a male screw (23) (23). This conductive plastic (21) is made of, for example, a synthetic resin mixed with metal or conductive powder such as graphite, and the surface of the male screw (23) is plated with metal to reduce the contact resistance with the drawer fitting etc. is preferred.
（２４） （２４）は第１の消弧性樹脂で、導電性プ
ラスチック（２１）のフランジ（２２ａ）（２２ａ）か
ら環状１（２１ａ）の手前までの部分を筒状に囲むよう
に、導電性プラスチック（２１）と一体的にモールド整
形されている。第１の消弧性樹脂（２４） （２４）
の素材としてはジュラコン、ユリア樹脂等の加熱すると
Ｈ２等の消弧性ガスを発生するものが使用される。（２
５）は一端に内側に向く鍔（２５ａ ）を有する円筒状
の第２の消弧性樹脂で、第１の消弧性樹脂（２’））
（２４−）の外周に滑動自在に嵌められる。この素材
は第１の消弧性樹脂（２４）と同様である。(24) (24) is the first arc-extinguishing resin, which is conductive so as to surround the part of the conductive plastic (21) from the flange (22a) (22a) to the front of the ring 1 (21a) in a cylindrical shape. It is molded integrally with the plastic (21). First arc-extinguishing resin (24) (24)
The material used is one that generates arc-extinguishing gas such as H2 when heated, such as Duracon or urea resin. (2
5) is a cylindrical second arc-extinguishing resin having a flange (25a) facing inward at one end;
It is slidably fitted onto the outer periphery of (24-). This material is the same as the first arc-extinguishing resin (24).
第２図（ａ） （ｂ） （Ｃ）に示す（２６）は金属帯
板をハツト形状に曲げたギャップ金臭で、第１図に示す
切り離し装置（２０）に端部側から外嵌できるように頂
面に孔（２７）を形成し、側面を円弧状に加工している
。なお側面に設けた切起しく２６ ａ ）が形成されて
いる。(26) shown in Figures 2 (a), (b), and (C) is a gap metal strip made by bending a metal strip into a hat shape, and can be fitted from the end side into the separating device (20) shown in Figure 1. A hole (27) is formed on the top surface, and the side surface is processed into an arc shape. Incidentally, a cut-out groove 26a) provided on the side surface is formed.
上記切り離し装置（２０）を具体的に使用するためにギ
ャップ金具（２６）と組合せた構造を第３図に示す。FIG. 3 shows a structure in which the separating device (20) is combined with a gap fitting (26) for concrete use.
前記ギャップ金具（２６）は、雄ネジ（２３）を形成し
た導電性プラスチック（２１）の大径部（２２）に、そ
の孔（２７）を挿通させ、第２の消弧性樹脂（２５）を
両端から覆うように嵌められる。そして、その先端のＲ
状屈曲部を対向させてギャップＧを形成する。この固定
は引出金臭（２８）とナンド（２９）による締め付けに
より行われている。The gap fitting (26) is formed by inserting the hole (27) into the large diameter part (22) of the conductive plastic (21) formed with the male thread (23), and inserting the second arc-extinguishing resin (25) into the gap fitting (26). It is fitted so as to cover it from both ends. And the tip R
A gap G is formed by making the bent portions face each other. This fixation is performed by tightening with a drawer odor (28) and a nand (29).
このようにギャップ金具（２６）と組合された切り離し
装置（２０）は第５図又は第６図に示すように避雷器（
２）と共に接地回路を構成する。The disconnection device (20) combined with the gap fitting (26) is connected to the lightning arrester (20) as shown in FIG. 5 or 6.
2) together form a grounding circuit.
次にこの切り離し装置（２ｏ）の動作を説明する。Next, the operation of this separation device (2o) will be explained.
雷サージ等の異常電圧はギャップＧ及び避雷器（２）を
通して大地に流れる。避雷器（２）が劣化して配電線の
通常の対地電圧を遮断できなくなると、導電性プラスチ
ック（２１）が発熱して溶断する。この溶断は強度的に
弱く、かつ発熱が集中する環状溝（２１ａ ）の形成部
分に生じる。そして導電性プラスチック（２１）は、電
線等の自重又は図示しない引張スプリングの刀で高速に
上下に分離する。このとき第１の消弧性樹脂（２４）
（２４）は上下に分離するが、円筒状の第２の消弧性
樹脂（２５）は、第１の消弧性樹脂（２４） （２４
）の双方に微小な隙間をもって嵌まり合っているので、
溶断部を狭い空間に閉じ込める。そして、溶断点にアー
クと共にガスが発生する。このガスは消弧性樹脂（２４
） （２４）（２５）によって囲まれた狭い空間内に
閉じ込められるので、急速に高圧になる。またアークは
消弧性樹脂（２４） （２４） （２５）の表面に
作用しＨ２等の消弧性気体を発生させる。このガス圧の
急上昇と、消弧性気体の発生の二つの条件によって、ア
ークは短時間で消滅し、配電線等の充電部における通常
の対地電圧による続流は遮断される。Abnormal voltage such as lightning surge flows to the ground through the gap G and the lightning arrester (2). When the lightning arrester (2) deteriorates and becomes unable to cut off the normal ground voltage of the distribution line, the conductive plastic (21) generates heat and melts. This fusing occurs in the portion where the annular groove (21a) is formed, which is weak in strength and where heat is concentrated. The conductive plastic (21) is separated vertically at high speed by the weight of the electric wire or the like or by the blade of a tension spring (not shown). At this time, the first arc-extinguishing resin (24)
(24) is separated into upper and lower parts, but the cylindrical second arc-extinguishing resin (25) is separated from the first arc-extinguishing resin (24) (24).
) fit into each other with a small gap,
Confines the fused part in a narrow space. Then, gas is generated along with an arc at the melting point. This gas is an arc-extinguishing resin (24
) (24) Since it is confined within a narrow space surrounded by (25), the pressure quickly becomes high. Further, the arc acts on the surfaces of the arc-extinguishing resins (24) (24) (25) to generate arc-extinguishing gas such as H2. Due to the two conditions of this rapid increase in gas pressure and the generation of arc-extinguishing gas, the arc is extinguished in a short time, and the follow-up current due to the normal ground voltage at live parts such as power distribution lines is interrupted.
以上説明した実施例は、本発明を避雷器の切り離し装置
として構成したものであったが、本発明は電気回路にお
ける切り離し装置としても用いることができる。In the embodiments described above, the present invention is configured as a disconnection device for a lightning arrester, but the present invention can also be used as a disconnection device in an electric circuit.
本発明によれば、導電性プラスチックの溶断部分を消弧
性樹脂で囲んで狭い空間を形成し、溶断時のアークを確
実に消せるようにした切り離し装置において、導電性プ
ラスチックの形状に工夫をしたので、製作工数が大幅に
減少し、コストを大幅に削減できると同時に、接触抵抗
を小さくして性能の向上と安定化が図れる。According to the present invention, the shape of the conductive plastic is devised in the disconnection device in which the fused part of the conductive plastic is surrounded by an arc-extinguishing resin to form a narrow space to ensure that the arc at the time of the fusion is extinguished. Therefore, the number of manufacturing steps can be significantly reduced, and costs can be significantly reduced. At the same time, contact resistance can be reduced to improve and stabilize performance.
４、′ＦＩ！Ｊ面の簡単な説明
第１図は本発明の一実施例を示す断面図である。第２図
はギャップ金具を示す図で、その＋ａ）は正面図、その
（ｂ）は平面図、その（Ｃ）は側面図である。第３図は
本発明をギャップ金具と組合せて示す断面図である。4,'FI! Brief Description of J-plane FIG. 1 is a sectional view showing an embodiment of the present invention. FIG. 2 is a diagram showing the gap fitting, in which +a) is a front view, (b) is a plan view, and (C) is a side view. FIG. 3 is a sectional view showing the present invention in combination with a gap fitting.
第４図は従来の切り離し装置の断面図、第５図及び第６
図は切り離し装置を避雷器に取りつける状態を示す説明
図、第７図は本発明の前提となる切り離し装置の断面図
である。Figure 4 is a sectional view of a conventional separating device, Figures 5 and 6.
The figure is an explanatory diagram showing the state in which the disconnection device is attached to the lightning arrester, and FIG. 7 is a sectional view of the disconnection device that is the premise of the present invention.
（２１）・−・導電性プラスチック、
（２２）−・・−大径部、 （２３） −ネジ部、
（２４） −第１の消弧性樹脂、
（２５） −第２の消弧性樹脂。(21) - Conductive plastic, (22) - Large diameter part, (23) - Threaded part,
(24) - First arc-extinguishing resin, (25) - Second arc-extinguishing resin.
特 許出願人 中部電力株式会社
氏 埋 人 江 原 省
吾第３図
第４図
第５図
第７ｊ
第６図Patent applicant Chubu Electric Power Co., Ltd. Jiangwon Province
Figure 3 Figure 4 Figure 5 Figure 7j Figure 6
Claims (1)
として機能するように導電率を選定し、両端に中間部よ
り大径のネジ部を形成した棒状の導電性プラスチックと
、 上記導電性プラスチックの外周面に、上記ネジ部を突出
させかつ中間を分離してモールド固着した第１の消弧性
樹脂と、 上記第１の消弧性樹脂にスライド自在に外嵌した筒状の
第２の消弧性樹脂とを備えることを特徴とする切り離し
装置。(1) A rod-shaped conductive plastic whose conductivity is selected so that it melts when the temperature rises to a predetermined value and functions as a heat-generating resistor, and which has threaded parts at both ends with a larger diameter than the middle part; A first arc-extinguishing resin is molded and fixed to the outer circumferential surface of the plastic with the threaded portion protruding and the intermediate portion separated, and a second cylindrical resin is slidably fitted onto the first arc-extinguishing resin. A disconnection device comprising: an arc-extinguishing resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27010088A JPH077688B2 (en) | 1988-10-25 | 1988-10-25 | Disconnecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27010088A JPH077688B2 (en) | 1988-10-25 | 1988-10-25 | Disconnecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02117084A true JPH02117084A (en) | 1990-05-01 |
| JPH077688B2 JPH077688B2 (en) | 1995-01-30 |
Family
ID=17481534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27010088A Expired - Fee Related JPH077688B2 (en) | 1988-10-25 | 1988-10-25 | Disconnecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH077688B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0421091U (en) * | 1990-06-08 | 1992-02-21 |
-
1988
- 1988-10-25 JP JP27010088A patent/JPH077688B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0421091U (en) * | 1990-06-08 | 1992-02-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH077688B2 (en) | 1995-01-30 |
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