JPH07118361B2 - Molybdenum arrester - Google Patents
Molybdenum arresterInfo
- Publication number
- JPH07118361B2 JPH07118361B2 JP2049072A JP4907290A JPH07118361B2 JP H07118361 B2 JPH07118361 B2 JP H07118361B2 JP 2049072 A JP2049072 A JP 2049072A JP 4907290 A JP4907290 A JP 4907290A JP H07118361 B2 JPH07118361 B2 JP H07118361B2
- Authority
- JP
- Japan
- Prior art keywords
- molybdenum
- lightning
- voltage
- current
- oxide film
- 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 - Lifetime
Links
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Description
【発明の詳細な説明】 この発明は電波信号のような高周波または、その他の商
用的微弱電圧による電流は通り難いが直撃雷のような大
きな衝撃波電流は瞬時に通して絶縁を回復し、しかも壊
れがたいとゆう特長を有する避雷器に関する。DETAILED DESCRIPTION OF THE INVENTION According to the present invention, it is difficult for a current due to a high frequency such as a radio wave signal or other commercial weak voltage to pass through, but a large shock wave current such as a direct lightning strike instantly passes through to restore insulation and break. The present invention relates to a lightning arrester having unique features.
従来の技術 アンテナ回路のような弱電回路を保護しようとすれば30
0V以下の低電圧で動作する避雷器が要求される。Conventional technology If you try to protect a light electric circuit such as an antenna circuit, 30
A lightning arrester that operates at a low voltage of 0 V or less is required.
しかし、酸化亜鉛方式の避雷素子は低電圧で動作する素
子になるに従い静電容量が大きくなり、従って高周波損
失が多くなる短所を有する。However, the zinc oxide type lightning protection device has a disadvantage that the capacitance increases as the device operates at a low voltage, and thus the high frequency loss increases.
このため従来は静電容量の少ない気中放電ギャップある
いは特殊ガス入り放電管などが使用されていた。For this reason, conventionally, an air discharge gap having a small capacitance or a discharge tube containing a special gas has been used.
これらの短所としては前者の放電ギャップは300Vという
極めて低い電圧で放電しなくてはいけないために両電極
間のギャップ長が10分の1mm以下という極めて短距離と
なり、従って大電流の直撃雷によって該電極が溶着して
短絡破壊を招く短所があった。The disadvantage of these is that the discharge gap of the former must be discharged at an extremely low voltage of 300 V, so the gap length between both electrodes becomes a very short distance of 1/10 mm or less, so that a direct current lightning strike of a large current There is a drawback that the electrodes are welded to cause short circuit breakdown.
後者のガス入り放電管では直撃雷でガス体が変化して壊
れ易いという短所があった。The latter gas-filled discharge tube has the drawback that the gas body changes due to direct lightning and is easily broken.
本発明が解決しようとする問題点と解決する手段。The problems to be solved by the present invention and means for solving the problems.
本発明はモリブデンからなる両電極の表面を熱的または
化学的に酸化させ酸化皮膜を造る。The present invention thermally or chemically oxidizes the surfaces of both electrodes made of molybdenum to form an oxide film.
このモリブデン酸化皮膜は、その厚みによって絶縁破壊
電圧が異なり求められる破壊電圧に対応する厚みを熱的
には温度と時間と酸素量、化学的には電解液の種類と濃
度と温度と流す電流値によって自由に造ることができ
る。This molybdenum oxide film has a different dielectric breakdown voltage depending on its thickness, and the thickness corresponding to the required breakdown voltage is thermally measured with respect to temperature and time and oxygen content, and chemically with respect to the type and concentration of electrolyte, temperature and current value to be passed. You can build it freely.
このようにして得たところの両電極を互いに密着させる
ことにより前述の高周波電流は通し難く、雷電流は通り
易すく、かつ壊れ難いという性質の避雷器を得ることが
できる。By closely contacting the two electrodes thus obtained with each other, it is possible to obtain a lightning arrester having characteristics that it is difficult for the high-frequency current to pass therethrough, the lightning current easily passes therethrough, and the breakage is difficult.
従って従来のギヤップ式避雷器にみられる放電時の両電
極の溶融短絡という問題は本発明によって解決する。Therefore, the present invention solves the problem of melting short circuit between both electrodes during discharge, which is seen in the conventional gear-up type arrester.
本発明の作用と実施例および効果について図面により具
体的に説明する。いま商用的課電電圧の一種である電波
信号はアンテナ１から導線２を通り通信機３を通り大地
４に通じて電波信号本来の目的を果たす。The operation, embodiment and effect of the present invention will be specifically described with reference to the drawings. A radio wave signal, which is a kind of commercial charging voltage, reaches the original purpose of the radio wave signal from the antenna 1 through the conductor 2, the communication device 3 and the ground 4.
本発明の避雷器12はアンテナ１と通信機３を結ぶ導線２
の中間に接続しモリブデン電極５およびモリブデン電極
６を通して大地７に接続する。The lightning arrester 12 of the present invention is a conductor 2 that connects the antenna 1 and the communication device 3.
Is connected to the ground 7 through the molybdenum electrode 5 and the molybdenum electrode 6.
平常時にはモリブデン電極５とモリブデン電極６との間
には両者それぞれの酸化皮膜によって絶縁が保たれてお
り、また両者間の静電容量も極めて少なく電波を大地へ
逃がすことは僅少であり電波信号の目的を妨害すること
はない。In normal times, the molybdenum electrode 5 and the molybdenum electrode 6 are kept insulated by their respective oxide films, and the electrostatic capacitance between them is extremely small, so that radio waves are rarely emitted to the ground, and the radio signal It does not interfere with the purpose.
しかし、雷サージ11が矢印方向に進行してくると極めて
低い動作電圧に整定したモリブデン酸化皮膜のため雷サ
ージ11は電極５から電極６へと導通して大地７へ放電流
出するので通信機は保護される。However, when the lightning surge 11 progresses in the direction of the arrow, the lightning surge 11 conducts from the electrode 5 to the electrode 6 and discharges to the ground 7 due to the molybdenum oxide film set to an extremely low operating voltage. Be protected.
このとき、雷放電電流に便乗して商用課電電圧の一種で
ある電波信号も大地へ流れようとするが、モリブデン酸
化皮膜の弁作用により続流を遮断する 本避雷器の動作状況を実験により観察し考察する。At this time, a radio signal, which is a type of commercial charging voltage, also tries to flow to the ground by piggybacking on the lightning discharge current, but the operating condition of this lightning arrester, which shuts off the follow-up current by the valve action of the molybdenum oxide film, is observed by experiments. And consider.
第２図はモリブデン電極５およびモリブデン電極６を接
触させた状態の縦断面を示すもので、両電極の酸化皮膜
はハッチングで示した部分である。FIG. 2 shows a vertical section in a state where the molybdenum electrode 5 and the molybdenum electrode 6 are in contact with each other, and the oxide film of both electrodes is a hatched portion.
いま、アンテナで受信した高周波電圧が導線２を通りモ
リブデン電極５を課電する。Now, the high frequency voltage received by the antenna passes through the conductor 2 and charges the molybdenum electrode 5.
高周波電流はモリブデン電極５からモリブデン電極６へ
流れようとするが、両電極5.6の接触部に存在するモリ
ブデン酸化皮膜8.9.10.などにより遮られ流れることが
できないでいる これは高周波電圧が該絶縁性酸化皮膜を破壊するに必要
な電圧に達しないからである。The high frequency current tries to flow from the molybdenum electrode 5 to the molybdenum electrode 6, but the high frequency voltage cannot be blocked because of the molybdenum oxide film 8.9.10. This is because the voltage required to destroy the conductive oxide film is not reached.
皮膜の絶縁破壊電圧は皮膜の厚さを変えることにより自
由に整定可能であるが、例えば250Vに整定したとして、
いま、10KV程度の雷サージが該皮膜に印加したとする。The dielectric breakdown voltage of the film can be freely set by changing the thickness of the film, but assuming that it is set to 250 V, for example,
Now, assume that a lightning surge of about 10 KV is applied to the film.
この場合、雷サージ電圧10KVは該皮膜の整定値電圧250V
より、はるかに高電圧のため絶縁皮膜8.9.10.のうち、
通り易い部分を集中して通過する。In this case, the lightning surge voltage 10KV is the set value voltage 250V of the film.
Because of the much higher voltage, the insulation film 8.9.10.
Concentrate and pass through easy-to-pass areas.
8.9.10.は電極5.6の接触面であり特に区分けしたわけで
はなく、それぞれ均等でバラツキのない接触面で絶縁耐
圧を有するを、理想とするが工作上バラツキを無くする
ことは容易でなく、いかにしても部分的に絶縁耐圧に差
を生ずる。8.9.10. Is the contact surface of the electrode 5.6 and is not particularly divided, and each has a uniform and uniform contact surface with a withstand voltage, which is ideal, but it is not easy to eliminate the variation due to machining. In any case, a partial difference occurs in the dielectric strength voltage.
そこで、仮に該接触面を8.9.10.と区分けして説明しよ
うとするものである。Therefore, the contact surface is tentatively described as 8.9.10.
本論に帰り雷サージは、このようにしてモリブデン電極
5.6を通過して大地７へ逃げ去る。Returning to this article, lightning surges are
Escape to Earth 7 through 5.6.
雷サージ電流は両極間の接触部８を通過する際に数千ア
ンペアあるいは数万アンペア但し時間的には10万分の１
秒間程度流れたとする。The lightning surge current is several thousand amperes or tens of thousands amperes when passing through the contact part 8 between the two poles, but 1 / 100,000 in terms of time.
Suppose that it has flowed for about a second.
この際、両極の接触部８が過熱して酸化皮膜の厚さが増
加すると絶縁耐圧も上昇するので、次の襲雷時には接触
部８より絶縁耐圧の低い部分、例えば接触部９が雷サー
ジ電流のながれる道となる。At this time, if the contact portions 8 of both electrodes are overheated and the thickness of the oxide film increases, the withstand voltage also rises. Therefore, at the next lightning strike, the portion with a lower withstand voltage than the contact portion 8, for example, the contact portion 9, is exposed to the lightning surge current. It will be a path to walk.
このようにして次の襲雷では接触部10が雷サージの通過
点となり、次、次と場所を変えながら避雷効果を果た
す。In this way, in the next lightning strike, the contact portion 10 becomes a passing point of the lightning surge, and the lightning protection effect is achieved while changing the place one after another.
実験によると、サージ電流波形8/20μS.4000A １秒間隔、やく1000回にて、 なお、故障することなく、実用に供することの確認が得
られた。According to the experiment, it was confirmed that the surge current waveform was 8/20 μS.4000A at 1 second intervals and 1000 times, and that it was put to practical use without failure.
モリブデン酸化皮膜の生成 加熱法 直径2mm 長さ約30mm の線状モリブデンを空気中にお
いて680℃ 約３時間加熱。Formation of molybdenum oxide film Heating method Heating linear molybdenum having a diameter of 2 mm and a length of about 30 mm in air at 680 ° C for about 3 hours.
この際、電気炉内の空気が希薄となったものと思われる
がテスト用サンプルは完成した。At this time, it is considered that the air in the electric furnace was diluted, but the test sample was completed.
電解法 直径2mm 長さ約30mm の線状モリブデンを直流電源の
プラス端子へ接続する。Electrolytic method Connect linear molybdenum with a diameter of 2 mm and a length of about 30 mm to the positive terminal of the DC power supply.
電解液は硝酸（濃度62％10cc）水90cc 液温 約14℃ 電流1A 通電時間 ３分間 マイナス電極としてカーボンを使用した。The electrolytic solution was nitric acid (concentration 62%, 10 cc), water 90 cc, liquid temperature approximately 14 ° C, current 1 A, energizing time 3 minutes. Carbon was used as the negative electrode.
このように加熱法、電解法で得られたところの第２図に
示すような電極5.6へ直流2Vを課電したが、両極間の漏
洩電流ゼロ。Thus, a DC voltage of 2 V was applied to the electrode 5.6 as shown in Fig. 2 obtained by the heating method and the electrolysis method, but the leakage current between both electrodes was zero.
しかし、250V絶縁抵抗計では０オームに近い数値が得ら
れ前述の動作電圧に近くなれば電流が流れ易くなること
の確認ができた。However, with a 250V insulation resistance tester, a value close to 0 ohm was obtained, and it could be confirmed that the current easily flows if the value approaches the above-mentioned operating voltage.
発明の効果 海洋を航海中の船舶においてマストの高さに近い位置に
ある通信用アンテナは洋上に突出しており、直撃雷を受
ける機会が最も多く、これによって交信が不通となり重
大な事態となることは衆知の通りである。Effects of the Invention In a ship navigating in the ocean, the communication antenna located near the height of the mast protrudes offshore, and it is most likely to be directly hit by lightning, which causes communication to be interrupted and becomes a serious situation. Is as is well known.
このような事態にならずに直撃雷を受けても、速やかに
海中へ放電することが可能となれば、何程か助かるであ
ろうと考えられる。Even if a direct lightning strike is received without such a situation, it would be helpful if it could be quickly discharged into the sea.
本発明のモリブデン避雷器は他の金属製放電ギャプを使
用する避雷器にみられる溶着現象が発生しないので数知
れない放電をくり返しても、なお、使用可能であり十分
実用に供することができるが、今後、数万アンペアの放
電を重ねて実験と改良を行えば、将来さらに明るい実績
を得られるものと確信する。The molybdenum lightning arrester of the present invention does not cause the welding phenomenon seen in lightning arresters using other metal discharge gaps, so even after repeated countless discharges, it is still usable and can be sufficiently put into practical use. I am convinced that if we carry out experiments and improvements by repeatedly discharging tens of thousands of amps, we will be able to obtain even brighter results in the future.
また、本発明のモリブデン避雷器は構造が簡単であり比
較的安価に製造可能である。The molybdenum arrester of the present invention has a simple structure and can be manufactured at a relatively low cost.
応用範囲としては、保護しようとする回路電圧が高い場
合でもモリブデン酸化皮膜電極を直列に積み重ねること
により、さらに高い動作開始電圧が得られるので、広範
囲に応用されることが期待される。As a range of application, even if the circuit voltage to be protected is high, by stacking the molybdenum oxide film electrodes in series, a higher operation starting voltage can be obtained, so that it is expected to be applied in a wide range.
第１図は本発明の原理と実施の１例を示す結線図であ
る。 第２図は本発明の原理を示す縦断面図である。 第１図 第２図において、 １はアンテナ ２はアンテナ１から通信機３に結ばれた導線 ３は通信機 4.7.は接地 ５は外周表面が酸化皮膜化したモリブデン電極 ６はモリブデン電極５と同じ構造のモリブデン電極 8.9.10.はモリブデン電極５とモリブデン電極６との接
触構造を説明するために仮に設けた接触点である 11は雷サージ、矢印は雷サージの方向を示す 12は本発明の全体を示すFIG. 1 is a connection diagram showing an example of the principle and implementation of the present invention. FIG. 2 is a vertical sectional view showing the principle of the present invention. 1 In FIG. 2, 1 is an antenna 2 is a conducting wire connected from the antenna 1 to the communication device 3 is a communication device 4.7. Is a ground 5 is a molybdenum electrode 6 whose outer peripheral surface is an oxide film 6 is the same as the molybdenum electrode 5 The molybdenum electrode 8.9.10. Of the structure is a contact point provisionally provided to explain the contact structure between the molybdenum electrode 5 and the molybdenum electrode 6, 11 indicates a lightning surge, and the arrow indicates the direction of the lightning surge 12 indicates the present invention Show the whole
Claims (1)
たモリブデンを、互いに接触させ一方のモリブデンは、
雷害を防止しようとする線へ、他の一方のモリブデンは
接地線にそれぞれ接続し襲雷時には雷電圧によって該接
触点は絶縁破壊を起こし導通して雷電流を大地へ逃がす
が、雷電流通過時の高熱で両モリブデンの接触点は周囲
の酸素と化合して再度酸化皮膜を形成し続いて流れよう
とする商用的課電電圧による続流を遮断し得るようにし
てなるモリブデン避雷器。1. Molybdenum having an electrically insulating oxide film formed on a metal surface is brought into contact with each other, and one of the molybdenum is
Connect the other molybdenum to the line to prevent lightning damage, and connect the other molybdenum to the grounding line respectively, and at the time of a lightning strike, the lightning voltage causes insulation breakdown at the contact point, causing conduction and allowing the lightning current to escape to the ground. The molybdenum arrester is designed so that the contact point of both molybdenum will combine with the surrounding oxygen due to the high heat at that time to form an oxide film again and cut off the follow-up current due to the commercial voltage applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2049072A JPH07118361B2 (en) | 1990-02-27 | 1990-02-27 | Molybdenum arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2049072A JPH07118361B2 (en) | 1990-02-27 | 1990-02-27 | Molybdenum arrester |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26337590A Division JPH03250576A (en) | 1990-10-01 | 1990-10-01 | Accelerating method for insulation recovery of molybdene lightning arrester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03250575A JPH03250575A (en) | 1991-11-08 |
| JPH07118361B2 true JPH07118361B2 (en) | 1995-12-18 |
Family
ID=12820880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2049072A Expired - Lifetime JPH07118361B2 (en) | 1990-02-27 | 1990-02-27 | Molybdenum arrester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07118361B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7636228B2 (en) | 2004-12-06 | 2009-12-22 | Array Proto Technology Inc. | Arrester |
| JP2018537612A (en) * | 2015-11-19 | 2018-12-20 | デーン プルス シェーネ ゲーエムベーハ プルス ツェオー．カーゲー | A method for influencing lightning current distribution in electrical systems embedded in wind turbine rotor blades |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001284009A (en) * | 2000-03-30 | 2001-10-12 | Mekatoro Giken:Kk | Surge protection device |
| TW522420B (en) * | 2000-06-20 | 2003-03-01 | Takashi Katoda | Fabrication method of surge protector device and the device fabricated by the method |
| JP3895911B2 (en) * | 2000-08-28 | 2007-03-22 | 隆 河東田 | Main component of surge protection device and manufacturing method thereof |
| WO2002054559A1 (en) * | 2000-12-28 | 2002-07-11 | Takayasu Kanemura | Surge-current avoiding device and its avoiding circuit |
| JP4484537B2 (en) | 2004-02-16 | 2010-06-16 | 創世理工株式会社 | Anti-surge protection device and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6095875A (en) * | 1983-09-30 | 1985-05-29 | シーメンス、アクチエンゲゼルシヤフト | Gas-sealed arrester and method of producing same |
-
1990
- 1990-02-27 JP JP2049072A patent/JPH07118361B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6095875A (en) * | 1983-09-30 | 1985-05-29 | シーメンス、アクチエンゲゼルシヤフト | Gas-sealed arrester and method of producing same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7636228B2 (en) | 2004-12-06 | 2009-12-22 | Array Proto Technology Inc. | Arrester |
| JP2018537612A (en) * | 2015-11-19 | 2018-12-20 | デーン プルス シェーネ ゲーエムベーハ プルス ツェオー．カーゲー | A method for influencing lightning current distribution in electrical systems embedded in wind turbine rotor blades |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03250575A (en) | 1991-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5309841A (en) | Zener diode for protection of integrated circuit explosive bridge | |
| RU98106392A (en) | PASS-INSULATOR WITH ELECTRIC CORROSION PROTECTION | |
| JPH07118361B2 (en) | Molybdenum arrester | |
| US3702420A (en) | Electrical surge diverting connector | |
| US4320435A (en) | Surge arrester assembly | |
| DE3681527D1 (en) | FUSE PROTECTION FOR A POWER CIRCUIT WITH AC. | |
| US2089555A (en) | Electrical discharge device | |
| US4484085A (en) | Spiral line voltage pulse generator characterized by secondary winding | |
| US3538382A (en) | Triggered vacuum gap overvoltage protective device | |
| CA1189137A (en) | Gas-discharge overvoltage arrester with concentrically surrounding socket | |
| US4365282A (en) | Overvoltage protector using varistor initiated arc | |
| US2414622A (en) | Switch | |
| US1603279A (en) | Spark arrester | |
| EP0998001B1 (en) | Method of preventing break in insulated wire and instantaneous power failure | |
| US1213844A (en) | Protective device. | |
| RU2227951C2 (en) | Discharger | |
| CA1188651A (en) | Electrode coating process | |
| CA1140207A (en) | Power spark gap high current conduction | |
| US2179673A (en) | Electrical gaseous discharge device | |
| KR20090125917A (en) | Lightning arrester using molybdenum and method of producing the same | |
| JPH10312876A (en) | Surge absorber | |
| US1232467A (en) | Spark-gap. | |
| CN212137284U (en) | Self-disengaging overvoltage protector | |
| US3501667A (en) | Surge protector for secondary voltage circuits | |
| RU2121741C1 (en) | Surge gap spark lightning arrester for electric power line |