JPH01144538A - Current limiting fuse - Google Patents
Current limiting fuseInfo
- Publication number
- JPH01144538A JPH01144538A JP30434487A JP30434487A JPH01144538A JP H01144538 A JPH01144538 A JP H01144538A JP 30434487 A JP30434487 A JP 30434487A JP 30434487 A JP30434487 A JP 30434487A JP H01144538 A JPH01144538 A JP H01144538A
- Authority
- JP
- Japan
- Prior art keywords
- fuse
- current limiting
- superconducting material
- temperature
- limiting fuse
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- 238000010304 firing Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims 1
- 238000005245 sintering Methods 0.000 abstract 4
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/06—Fusible members characterised by the fusible material
Landscapes
- Fuses (AREA)
Abstract
Description
【発明の詳細な説明】
発明の目的
（産業上の利用分野〉
この発明は超電導材１１を使用した限流ヒユーズに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a current limiting fuse using a superconducting material 11.
（従来の技術）
従来構成の限流ヒユーズは例えば銀等のヒユーズエレメ
ントを外周にスパイラル状に巻装した絶縁コアを絶縁筒
内に内装して、絶縁筒内に消弧砂を充填し、絶縁筒の両
端を電極にて密閉することにより構成されている。(Prior art) A current limiting fuse with a conventional structure has an insulating core in which a fuse element made of silver or the like is wound spirally around the outer periphery, and an insulating tube is filled with arc-extinguishing sand. It is constructed by sealing both ends of a cylinder with electrodes.
（発明が解決しようとする問題点）
このように構成された限流ヒユーズは絶縁コアにヒユー
ズエレメントを巻装する工程、消弧砂の充填工程を必要
とし、製作工数が増えてロス１〜高の原因となるととも
に、絶縁コアを必要として構造も複雑となっていた。(Problems to be Solved by the Invention) The current limiting fuse configured in this manner requires a process of wrapping the fuse element around the insulating core and a process of filling arc-extinguishing sand, which increases the number of manufacturing steps and causes a loss of 1 to 100%. In addition to causing problems, the structure also became complicated due to the need for an insulating core.
この発明は前記問題点を解消するためになされたもので
あって、構造が簡単でかつ製作が容易であり、製作コス
トを低減できる限流ヒユーズを提供することにある。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a current-limiting fuse that has a simple structure, is easy to manufacture, and can reduce manufacturing costs.
発明の構成
（問題点を解決するための手段）
この限流ヒユーズはヒユーズ要素を焼成時の温度以下で
は低抵抗を有し、焼成時の温度を越えるとき高抵抗を有
する超電導材料から構成したことをその要旨とするもの
である。Structure of the Invention (Means for Solving Problems) This current limiting fuse has a fuse element made of a superconducting material that has low resistance below the firing temperature and high resistance when the firing temperature is exceeded. Its gist is as follows.
（作用）
定格以下の通常の大きさの負荷電流が流れているときは
ヒユーズ要素は低抵抗であるため、発熱も低く焼成時の
温度よりも低いのでなんら支障はない。短絡電流のよう
な大電流が流れると、ヒユーズ要素は瞬時に発熱し、焼
成温度を越えると高抵抗体になる。この結果、短絡電流
はピークに達することなく急に抑制され、遮断される。(Function) When a load current of a normal magnitude below the rating is flowing, the fuse element has a low resistance, so the heat generation is low and the temperature is lower than the firing temperature, so there is no problem. When a large current such as a short-circuit current flows through the fuse element, it instantly generates heat and becomes a high-resistance element when the firing temperature is exceeded. As a result, the short circuit current is suddenly suppressed and cut off without reaching its peak.
（実施例）
以下、この発明を具体化した一実施例を図に従って説明
する。(Example) An example embodying the present invention will be described below with reference to the drawings.
限流ヒユーズＦは絶縁筒１の両端部にキャップ状をなす
電極２が被冠されている。又、絶縁筒１内にはヒユーズ
要素として焼成していない粉状の超電導材料３が密に充
填されている。The current limiting fuse F has cap-shaped electrodes 2 placed on both ends of an insulating cylinder 1. Further, the insulating cylinder 1 is densely filled with unfired powdered superconducting material 3 as a fuse element.
この実施例では超電導材料としてはイブコ（（Ｂａ２／
３ Ｙ１／３ ） Ｃｕ６ ｏ１４＞が使用されている
。In this example, the superconducting material is IBUCO ((Ba2/
3 Y1/3 ) Cu6 o14> is used.
イプコは焼成時の温度９６０’ Ｃ以下では低抵抗を有
し、例えば常温においては１０−４Ωｃｍである。又、
イブコは焼成時の温度９６０’ Ｃを越えるとき数ＭＯ
Ｃｍの高抵抗を示すものでおる。なお、イブコは常温に
おける抵抗値が１０−４Ωｃｍであるので、定格容量に
応じて前記絶縁筒１内に充填されるイブコの断面積を銅
エレメントの断面積の約１０〜１００倍にするものとす
る。Ipco has a low resistance at a firing temperature of 960'C or less, for example, 10-4 Ωcm at room temperature. or,
Ibuco has several MO when the temperature during firing exceeds 960'C.
It shows high resistance of Cm. In addition, since Ibuco has a resistance value of 10-4 Ωcm at room temperature, the cross-sectional area of Ibuco filled in the insulating cylinder 1 should be approximately 10 to 100 times the cross-sectional area of the copper element, depending on the rated capacity. do.
さて、前記のように構成された限流ヒユーズＦの作用に
ついて説明する。Now, the operation of the current limiting fuse F configured as described above will be explained.
通常の場合、限流ヒユーズＦに負荷電流が流れても超電
導材料３は抵抗値が低いため、発熱しても温度は焼成時
の温度９６０°Ｃよりも高くならないため、支障なく負
荷電流は流れる。Normally, even if a load current flows through the current limiting fuse F, the superconducting material 3 has a low resistance value, so even if it generates heat, the temperature will not rise above the firing temperature of 960°C, so the load current will flow without any problem. .
短絡事故等が発生して大電流が流れると、ヒユーズ要素
は瞬時に発熱し、その発熱により超電導材料３の温度が
焼成温度９６０°Ｃを越えると、高抵抗体になるため、
短絡電流はピークに達することなく、急に抑制され、遮
断される。When a short circuit accident occurs and a large current flows, the fuse element instantaneously generates heat, and when the temperature of the superconducting material 3 exceeds the firing temperature of 960°C, it becomes a high-resistance element.
The short circuit current is suddenly suppressed and cut off without reaching its peak.
なお、この発明は前記実施例に限定されるものではなく
、以下のように実施してもよい。Note that this invention is not limited to the above embodiments, and may be implemented as follows.
（イ） 前記実施例では絶縁筒１内に超電導材料３を充
填したが、絶縁筒１を省略する代わりに粉状の超電導材
料３を接着剤にて棒状に形成し、その棒状の超電導材料
３両端に電極２を嵌着すること。(a) In the above embodiment, the superconducting material 3 was filled in the insulating cylinder 1, but instead of omitting the insulating cylinder 1, the powdered superconducting material 3 was formed into a rod shape with adhesive, and the rod-shaped superconducting material 3 Fit the electrodes 2 on both ends.
（ロ） （イ）において、棒状の超電導材料３の軸心
方向中間部の外周に切欠きを形成し、短絡電流等の大電
流が流れたときに、その切欠き部分にて破壊されるよう
に棒状の超電導材料３の熱破壊を容易にすること。こう
することにより、回路は確実に遮断することができる。(b) In (a), a notch is formed on the outer periphery of the rod-shaped superconducting material 3 at the middle part in the axial direction, so that when a large current such as a short circuit current flows, it will be destroyed at the notch part. To facilitate thermal destruction of the rod-shaped superconducting material 3. By doing so, the circuit can be reliably interrupted.
（ハ） イブコ以外の他の超電導材料を使用すること。(c) Use of superconducting materials other than Ibuco.
（ニ） 他の開蓋、例えばスイッチ等と組合わせること
。このようにすれば限流ヒユーズが限流するため、スイ
ッチ等の機器の熱的強度の軽減を図ることができる。従
って、コンパクトな限流遮断装置が実現できる。(d) Can be combined with other openings, such as switches. In this way, the current limiting fuse limits the current, so it is possible to reduce the thermal intensity of devices such as switches. Therefore, a compact current limiting device can be realized.
発明の効果
以上詳述したようにこの発明は従来と異なり、従来の限
流ヒユーズと比較して限流ヒユーズの構造も簡単になる
ばかりか、製作上も容易となり、製作コストの低減を図
ることができる効果を奏し、産業利用１優れた発明であ
る。Effects of the Invention As detailed above, this invention differs from the conventional ones in that the structure of the current limiting fuse is not only simpler than the conventional current limiting fuse, but also easier to manufacture, thereby reducing manufacturing costs. This is an excellent invention for industrial use.
図はこの発明を具体化した一実施例の限流ヒユーズの縦
断面図である。
１・・・絶縁筒、２・・・電極、３・・・超電導材料、
Ｆ・・・限流ヒユーズ。The figure is a longitudinal cross-sectional view of a current-limiting fuse according to an embodiment of the present invention. 1... Insulating tube, 2... Electrode, 3... Superconducting material,
F...Current limiting fuse.
Claims (1)
ューズにおいて、前記ヒューズ要素を焼成時の温度以下
では低抵抗を有し、焼成時の温度を越えるとき高抵抗を
有する超電導材料から構成したことを特徴とする限流ヒ
ューズ。 ２、前記ヒューズ要素は超電導材料粉を接着剤にて固め
て形成したものである特許請求の範囲第１項に記載の限
流ヒューズ。 ３、前記ヒューズ要素は前記電極を両端に配置した絶縁
筒内に充填された粉状の超電導材料である特許請求の範
囲第１項に記載の限流ヒューズ。[Claims] 1. In a current limiting fuse in which a fuse element is connected and arranged between a pair of electrodes, the fuse element has a low resistance at a temperature below the firing temperature and a high resistance when the temperature exceeds the firing temperature. A current-limiting fuse characterized in that it is constructed from a superconducting material having: 2. The current limiting fuse according to claim 1, wherein the fuse element is formed by hardening superconducting material powder with an adhesive. 3. The current limiting fuse according to claim 1, wherein the fuse element is a powdered superconducting material filled in an insulating cylinder with the electrodes arranged at both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30434487A JPH01144538A (en) | 1987-11-30 | 1987-11-30 | Current limiting fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30434487A JPH01144538A (en) | 1987-11-30 | 1987-11-30 | Current limiting fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01144538A true JPH01144538A (en) | 1989-06-06 |
Family
ID=17931882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30434487A Pending JPH01144538A (en) | 1987-11-30 | 1987-11-30 | Current limiting fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01144538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2650078A1 (en) * | 1989-07-18 | 1991-01-25 | Electricite De France | System for detecting a fault in the insulation of a medium voltage line for distributing electrical power |
-
1987
- 1987-11-30 JP JP30434487A patent/JPH01144538A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2650078A1 (en) * | 1989-07-18 | 1991-01-25 | Electricite De France | System for detecting a fault in the insulation of a medium voltage line for distributing electrical power |
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