JPH0350400B2 - - Google Patents
Info
- Publication number
- JPH0350400B2 JPH0350400B2 JP60192744A JP19274485A JPH0350400B2 JP H0350400 B2 JPH0350400 B2 JP H0350400B2 JP 60192744 A JP60192744 A JP 60192744A JP 19274485 A JP19274485 A JP 19274485A JP H0350400 B2 JPH0350400 B2 JP H0350400B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- grounded
- lightning
- lightning rod
- grounding
- 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
- 239000004020 conductor Substances 0.000 claims description 36
- 239000004698 Polyethylene Substances 0.000 claims description 10
- -1 polyethylene Polymers 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Elimination Of Static Electricity (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は雷サージを大地へ導く避雷針の接地
導体の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an improvement in the grounding conductor of a lightning rod that guides lightning surges to the ground.
［従来の技術］
従来の技術による避雷針の接地導体は避雷針を
接地するための導線に銅線などの単線を用いてい
る。この場合のインピーダンスの定格値は約
200Ωと高い値である。[Prior Art] A grounding conductor for a lightning rod according to the prior art uses a single wire such as a copper wire as a conducting wire for grounding the lightning rod. In this case, the rated value of impedance is approximately
It has a high value of 200Ω.
［発明が解決しようとする問題点］
上記の従来の避雷針は導線のインピーダンスが
約200Ωと比較的高いため落雷したときの雷電流
による雷サージ電圧を十分に低下させることがで
きず、避雷針の導線から他の工作物へ逆閃絡する
など問題があつた。[Problems to be Solved by the Invention] In the conventional lightning rod described above, the impedance of the conducting wire is relatively high, about 200Ω, so it is not possible to sufficiently reduce the lightning surge voltage caused by the lightning current when lightning strikes. There were problems such as reverse flashing from the machine to other workpieces.
［問題点を解決するための手段］
この発明の低インピーダンス接地避雷針は、一
端に避雷針を接続し、他端を接地した長い平板状
の第１の導体、及び上記第１の導体に断面がＨ型
のポリエチレンの絶縁物により構成された誘電棒
の凹溝部を介することにより所定の対面距離を保
つて設定され所定の分布容量を有するように並置
し、かつ一端を第１の導体の接地点から接地する
土地の大地定数である比誘電率及び比透磁率に対
応して選定した所定の距離を隔てて接地した長い
平板状の第２の導体を備えている。[Means for Solving the Problems] The low impedance grounding lightning rod of the present invention includes a long flat first conductor having one end connected to the lightning rod and the other end grounded, and the first conductor having a cross section of H. dielectric rods made of polyethylene insulators are arranged side by side to maintain a predetermined face-to-face distance and have a predetermined distributed capacitance through the grooves of the dielectric rods, and one end is connected to the grounding point of the first conductor. A long flat plate-shaped second conductor is connected to the ground at a predetermined distance selected in accordance with the relative permittivity and relative magnetic permeability of the land to be grounded.
［作用］
長い平板状の第１及び第２の導体がポリエチレ
ン絶縁物を介してその平板状の面で対向している
ので雷サージが発生すると第１及び第２の導体間
に電位を生じ、この電位によつて両導体間に介在
するポリエチレン２０の薄肉部分に誘電分極を生
じる。その結果両導体間の静電容量が増加してイ
ンピーダンスが低下し、雷サージの波頭が緩やか
になり波高値を減少させる。[Operation] Since the long flat conductors face each other on their flat surfaces with the polyethylene insulator in between, when a lightning surge occurs, an electric potential is generated between the first and second conductors. This potential causes dielectric polarization in the thin portion of the polyethylene 20 interposed between both conductors. As a result, the capacitance between both conductors increases, impedance decreases, the wave front of the lightning surge becomes gentler, and the wave height value decreases.
［実施例］
第１図はこの発明の避雷針の実施例の接地導体
６を示す斜視図である。図において、断面がＨ型
になされたポリエチレン製の絶縁部材２０の一方
の凹溝に長い平板状の第１の導体１８が挿入され
ている。絶縁部材２０の他方の凹溝には同様に長
い平板状の第２の導体１９が挿入されている。す
なわち第１及び第２の導体１８，１９はそれぞれ
の広い方の側面同士が絶縁部材２０の中央の薄肉
部を介して対向するように挿入されている。[Embodiment] FIG. 1 is a perspective view showing a grounding conductor 6 of an embodiment of the lightning rod of the present invention. In the figure, a long flat first conductor 18 is inserted into one groove of an insulating member 20 made of polyethylene and having an H-shaped cross section. Similarly, a long plate-shaped second conductor 19 is inserted into the other groove of the insulating member 20. That is, the first and second conductors 18 and 19 are inserted so that their wide side faces face each other through the thin central portion of the insulating member 20.
第２図にこの実施例が例えば気象観測用の鉄塔
に適用された例を示す。図において鉄塔１は気象
観測用の気象塔であり頂部には例えば風向計３な
どの観測装置が設置されている。接地導体６は鉄
塔１に絶縁碍子５を介して取り付けられており雷
電位においても十分な絶縁を保持するようになさ
れている。避雷針４は第１図に示す第１の導体１
８の一端に接続されており、第１の導体１８の他
端８は鉄塔１の地上基部において接地されてい
る。第２の導体１９の下端は接地線１７によつて
接地されている。接地線１７の接地点と第１の導
体１８の他端８の接地点は所定距離隔てられてお
り、その距離ｄは例えば10ｍ程度になされてい
る。 FIG. 2 shows an example in which this embodiment is applied to, for example, a steel tower for weather observation. In the figure, a steel tower 1 is a meteorological tower for weather observation, and an observation device such as a wind vane 3 is installed at the top. The ground conductor 6 is attached to the steel tower 1 via an insulator 5, and is designed to maintain sufficient insulation even at lightning potential. The lightning rod 4 is connected to the first conductor 1 shown in FIG.
The other end 8 of the first conductor 18 is grounded at the ground base of the steel tower 1 . The lower end of the second conductor 19 is grounded by a grounding wire 17. The grounding point of the grounding wire 17 and the grounding point of the other end 8 of the first conductor 18 are separated by a predetermined distance, and the distance d is, for example, about 10 m.
次に動作について説明する。 Next, the operation will be explained.
避雷針４に雷サージが発生すると、第１の導体
１８の接地点と第２の導体１９の接地点が離れて
いるため両者間に電位が生じ、この電位によつて
ポリエチレン絶縁部材２０に誘電分極が生じる。
ポリエチレンは絶縁物の中でも誘電分極が生じや
すい。その結果第１の導体１８と第２の導体１９
間の静電容量が増加してインピーダンスが低下す
る。インピーダンスが低下した結果雷サージの波
頭が緩やかになり波高値が減少する。第１及び第
２の導体１８及び１９間の距離は絶縁部材２０の
厚さを所定の寸法にすることによつて設定され
る。両導体の接地点の距離ｄは接地する土地の大
地定数である比誘電率及び比透磁率によつて最適
な値が求められる。 When a lightning surge occurs in the lightning rod 4, a potential is generated between the grounding point of the first conductor 18 and the grounding point of the second conductor 19 because they are far apart, and this potential causes dielectric polarization in the polyethylene insulating member 20. occurs.
Even among insulators, polyethylene is susceptible to dielectric polarization. As a result, the first conductor 18 and the second conductor 19
The capacitance between them increases and the impedance decreases. As a result of the decrease in impedance, the wave front of the lightning surge becomes gentler and the wave height value decreases. The distance between the first and second conductors 18 and 19 is set by making the thickness of the insulating member 20 a predetermined dimension. The distance d between the grounding points of both conductors is determined to be an optimum value based on the relative permittivity and relative magnetic permeability, which are earth constants of the land to be grounded.
［発明の効果］
以上のようにこの発明によれば、いずれも長い
平板状の第１の導体１８と第２の導体１９の両者
が広い方の面でポリエチレンのＨ型断面の誘電棒
の薄肉部分を隔てて相対向しているので対向面積
が広くとれるとともに両者の間に所定の設定距離
が正確に保たれる。その結果両導体間の静電容量
が大きくとれ、避雷針と接地間のインピーダンス
が低いものとなるとともにポリエチレンに大きな
誘電分極が生じる。従つて両導体間の静電容量が
増加してインピーダンスが低下する。その結果雷
サージの波頭が緩やかになり波高値を減少させ
る。従つて避雷針に生じた雷サージ電圧を十分に
低下させることができ、他の工作物への逆閃絡に
よる雷被害を軽減することができる。[Effects of the Invention] As described above, according to the present invention, both the long flat first conductor 18 and the second conductor 19 are made of a thin dielectric rod made of polyethylene and having an H-shaped cross section at their wide sides. Since they face each other with their parts separated, the facing area can be widened and a predetermined set distance can be accurately maintained between them. As a result, the capacitance between both conductors becomes large, the impedance between the lightning rod and the ground becomes low, and large dielectric polarization occurs in the polyethylene. Therefore, the capacitance between both conductors increases and the impedance decreases. As a result, the wave crest of the lightning surge becomes gentler and the wave height value decreases. Therefore, the lightning surge voltage generated in the lightning rod can be sufficiently reduced, and lightning damage caused by reverse flash to other workpieces can be reduced.
第１図はこの発明の実施例を示す斜視図、第２
図はこの発明の適用例を示す図である。
４：避雷針、１８：第１の導体、１９：第２の
導体、２０：ポリエチレン絶縁部材。
Fig. 1 is a perspective view showing an embodiment of the invention, Fig. 2 is a perspective view showing an embodiment of the invention;
The figure shows an example of application of the present invention. 4: Lightning rod, 18: First conductor, 19: Second conductor, 20: Polyethylene insulation member.
Claims (1)
平板状の第１の導体、及び 上記第１の導体に断面がＨ型のポリエチレンの
絶縁物により構成された誘電棒の凹溝部を介する
ことにより所定の対面距離を保つて設定され所定
の分布容量を有するように並置し、かつ一端を第
１の導体の接地点から接地する土地の大地定数で
ある比誘電率及び比透磁率に対応して選定した所
定の距離を隔てて接地した長い平板状の第２の導
体、 を有する低インピーダンス接地避雷針。[Scope of Claims] 1. A long flat first conductor with a lightning rod connected to one end and grounded at the other end, and a dielectric rod made of a polyethylene insulator with an H-shaped cross section on the first conductor. The relative permittivity, which is the earth constant of the land, is set so as to maintain a predetermined face-to-face distance through the concave groove part of the conductor, and are arranged in parallel to have a predetermined distributed capacitance, and one end is grounded from the grounding point of the first conductor. A low impedance grounding lightning rod comprising: a long flat second conductor grounded at a predetermined distance selected in accordance with relative magnetic permeability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19274485A JPS6252900A (en) | 1985-08-30 | 1985-08-30 | Low impedance ground lightning conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19274485A JPS6252900A (en) | 1985-08-30 | 1985-08-30 | Low impedance ground lightning conductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6252900A JPS6252900A (en) | 1987-03-07 |
| JPH0350400B2 true JPH0350400B2 (en) | 1991-08-01 |
Family
ID=16296333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19274485A Granted JPS6252900A (en) | 1985-08-30 | 1985-08-30 | Low impedance ground lightning conductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6252900A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2591211B2 (en) * | 1990-01-24 | 1997-03-19 | 松下電器産業株式会社 | High-speed interrupt processing device |
| JP4709715B2 (en) * | 2006-08-30 | 2011-06-22 | 新日本製鐵株式会社 | Lightning arrester, structural pillar having lightning protection function, and method of reducing lightning surge voltage |
| JP2008166104A (en) * | 2006-12-28 | 2008-07-17 | Nippon Steel Corp | Grounding electrode, grounding electrode group, and reduction method of lightning surge voltage |
| WO2008026766A1 (en) * | 2006-08-30 | 2008-03-06 | Nippon Steel Corporation | Lightning arrestor, grounding electrode, and thunder surge voltage reducing method |
| JP5168680B1 (en) * | 2012-06-26 | 2013-03-21 | 正弘 五十嵐 | Shield ground wire |
| JP7078930B2 (en) * | 2018-07-03 | 2022-06-01 | 国立大学法人 名古屋工業大学 | Insulated lightning protection system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58216396A (en) * | 1982-06-10 | 1983-12-16 | 関西電力株式会社 | Lightning grounding device |
-
1985
- 1985-08-30 JP JP19274485A patent/JPS6252900A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58216396A (en) * | 1982-06-10 | 1983-12-16 | 関西電力株式会社 | Lightning grounding device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6252900A (en) | 1987-03-07 |
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