JPH0141132Y2 - - Google Patents
Info
- Publication number
- JPH0141132Y2 JPH0141132Y2 JP3383983U JP3383983U JPH0141132Y2 JP H0141132 Y2 JPH0141132 Y2 JP H0141132Y2 JP 3383983 U JP3383983 U JP 3383983U JP 3383983 U JP3383983 U JP 3383983U JP H0141132 Y2 JPH0141132 Y2 JP H0141132Y2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- overhead ground
- lightning
- ground wire
- overhead
- 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
Links
- 230000008018 melting Effects 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Non-Insulated Conductors (AREA)
- Insulators (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Description
本考案は架空地線の改良に係り、特に直撃雷に
よる架空地線の素線切れを防止するのに適する耐
雷電線に関する。
一般に、架空送電線においては、電力線への直
撃雷を防止するための架空地線が支持物の最上部
に架線されており、この架空地線で直撃雷を受け
止め雷電流を支持物を介して大地に流す構成とし
ている。
従来、架空地線としては、例えば鋼心上にアル
ミ線を撚合せてなる鋼心アルミ撚線が知られてい
る。ところで、近時、架空地線に素線切れが発生
しており、最近になつてその原因は、直撃雷によ
るアーク溶断であることが判明しつつある。従つ
て直撃雷によつて架空地線のアルミ線に素線切れ
が発生すれば、架空地線の機能上、電気的特性、
機械的特性の低下をきたし、場合によつては非常
に大きな雷電流によつて電線全体がアーク溶断す
るという重大な事故にもなりかねない恐れがあ
る。
本考案は、このような点に着目してなされたも
ので、直撃雷による素線切れを防止するのに有用
な耐雷電線を提供せんとするものである。
以下、本考案を一実施例の図面に基づいて説明
する。第１図において、本考案に係る耐雷電線
は、架空地線１等より成る架空線と、この外周に
設けられた溶損層２とで主に構成されている。架
空地線１は、鋼線を撚合せた鋼心３と、この外周
に撚合せた断面梯形の複数本のアルミ線４を円筒
状に撚合せてなるアルミ導電線５とで構成されて
いる。
ここで、溶損層２を設ける理由について述べ
る。
本考案者等の雷模擬アーク試験によれば、溶断
による素線切れは、インパルス波形の電流のみで
The present invention relates to improvements in overhead ground wires, and more particularly to lightning-resistant electrical wires suitable for preventing strand breakage of overhead ground wires due to direct lightning strikes. Generally, in overhead power transmission lines, an overhead ground wire is installed at the top of the support to prevent direct lightning strikes to the power line, and this overhead ground wire receives direct lightning strikes and directs the lightning current through the supports. It is designed to flow into the ground. Conventionally, as an overhead ground wire, for example, a steel core aluminum stranded wire formed by twisting aluminum wires on a steel core is known. Incidentally, wire breaks have recently occurred in overhead ground wires, and it has recently become clear that the cause of the breakage is arc melting caused by direct lightning strikes. Therefore, if a wire breakage occurs in the aluminum wire of an overhead ground wire due to a direct lightning strike, the functional and electrical characteristics of the overhead ground wire may be affected.
This may lead to a decrease in mechanical properties, and in some cases, a very large lightning current may cause arc-fusion of the entire wire, leading to a serious accident. The present invention has been made in view of these points, and aims to provide a lightning-resistant electric wire that is useful for preventing strands from breaking due to direct lightning strikes. Hereinafter, the present invention will be explained based on the drawings of one embodiment. In FIG. 1, the lightning-resistant electric wire according to the present invention is mainly composed of an overhead wire consisting of an overhead ground wire 1, etc., and a wear layer 2 provided on the outer periphery of the overhead wire. The overhead ground wire 1 is composed of a steel core 3 made of twisted steel wires, and an aluminum conductive wire 5 made by twisting a plurality of aluminum wires 4 having a trapezoidal cross section around the outer periphery of the steel core 3 into a cylindrical shape. . Here, the reason for providing the erosion layer 2 will be described. According to the lightning simulation arc test carried out by the present inventors, strand breakage due to fusing occurs only with impulse waveform current.
【表】
以上の実験結果から、鋼心アルミ撚線系の架空
地線においては、継続時間の長い直撃雷があつた
場合溶断する可能性が高いが、アルミそのものの
溶融点が鋼線系に比較して低いことから、アルミ
自身を溶融点の高い耐アーク性のものにすること
は不可能に近い。
そこで本考案においては、架空地線の外表面に
溶損層を形成し直撃雷があつ場合は、溶損層のみ
を溶断させ、本体たる内部の架空地線について
は、初期の電気的特性および機械的特性を永久的
に維持せんとするものである。
溶損層２は、第２図に示すように、その全長を
多区間７に区分した架空地線１外周にプレフオー
ムされたアルミ合金線等の金属体よりなる溶損体
６を架空地線１の全外周面を覆うごとく巻装密着
することにより形成されている。
なお、溶損体６の断面は、アルミ線と同様に梯
形とされている。これは、本考案に係る耐雷電線
が通常の架空地線と比較した場合、その構成上、
余分な溶損層を有しているので、それだけ外形を
縮小させる必要があるからである。すなわち、外
形が増大するとそれだけ架空地線が重くなり、そ
れだけ支持物の機械的強度を増大させなければな
らず、従つてこのままでは既存の支持物を使用で
きなくなるからである。
溶損層２は、例えば架空地線を架線した後、自
走式の宙乗機で単長が３〜５ｍ程度の溶損体６を
各区間毎に巻回装着することにより形成される。
なお、この溶損層は、工場においてあらかじめ架
空地線外周に形成しておいてもよい。各区間毎に
溶損層２を設けるようにしたのは、アーク溶断時
に溶損体６が数本溶断した場合、簡単にその部分
の取り換えを容易にするためであり、また最外層
たる溶損層２に架線時に張力を分担させないため
である。すなわち、仮りに溶損層２に張力が分担
されている状態で直撃雷によるアーク溶断で溶損
体６が数本断線すると、架線時の張力が全部架空
地線に移行することになり、ついには架空地線が
断線するからである。
なお、溶損体６の内周面すなわち架空地線１と
接する面は、架空地線１と電気的に接続するた
め、架空地線の外形に相当する曲率半径で形成す
ることが望ましい。
以上、述べたように本考案においては、架空地
線の上に溶損層を設けて耐雷電線を形成している
ので直撃雷によつて溶損体の一部が溶損しても、
本体たる架空地線が何等損傷を受けない。また、
溶損した部分の取替えが可能につきその部分を補
修して再利用できる利点もある。従つて本考案に
おいては、耐雷機能を有する耐雷電線を提供でき
る。
なお、前述の実施例においては、架空地線の外
周に溶損層を設けた場合についてのみ述べてある
が、本考案はこれに限定されず例えば、電力線の
外周に溶損層を設けてもよい。[Table] From the above experimental results, an overhead ground wire made of steel-core aluminum stranded wire is likely to melt if a long-duration direct lightning strike hits it, but the melting point of the aluminum itself is higher than that of steel wire. Because of its relatively low melting point, it is almost impossible to make aluminum itself arc resistant with a high melting point. Therefore, in this invention, if a frayed layer is formed on the outer surface of the overhead ground wire and there is a direct lightning strike, only the frayed layer is melted, and the initial electrical characteristics and The aim is to maintain mechanical properties permanently. As shown in FIG. 2, the erosion layer 2 includes a erosion body 6 made of a metal body such as an aluminum alloy wire preformed on the outer periphery of the overhead ground wire 1 whose entire length is divided into multiple sections 7. It is formed by tightly wrapping the material so as to cover the entire outer peripheral surface of the material. Note that the cross section of the melted body 6 is trapezoidal like the aluminum wire. This is due to the structure of the lightning-resistant wire according to the present invention compared to a normal overhead ground wire.
This is because, since it has an extra erosion layer, it is necessary to reduce the external shape accordingly. That is, as the external shape increases, the overhead ground wire becomes heavier, and the mechanical strength of the support must be increased accordingly, making it impossible to use the existing support as it is. The erosion layer 2 is formed, for example, by connecting an overhead ground wire and then winding and attaching an erosion body 6 having a unit length of about 3 to 5 m in each section using a self-propelled spacecraft.
Note that this erosion layer may be formed in advance on the outer periphery of the overhead ground wire in a factory. The reason why the melting layer 2 is provided in each section is to make it easy to replace the melted body 6 when several melted bodies 6 are cut off during arc melting. This is to prevent the layer 2 from sharing the tension when the overhead wire is installed. In other words, if several of the melted bodies 6 are broken due to arc melting caused by a direct lightning strike while the tension is shared in the melted layer 2, all the tension on the overhead wires will be transferred to the overhead ground wire, and finally This is because the overhead ground wire is disconnected. Note that the inner circumferential surface of the melted body 6, that is, the surface in contact with the overhead ground wire 1, is desirably formed with a radius of curvature corresponding to the outer shape of the overhead ground wire, since it is electrically connected to the overhead ground wire 1. As mentioned above, in the present invention, a lightning protection wire is formed by providing a melting layer on the overhead ground wire, so even if a part of the melting body is damaged by a direct lightning strike,
The main body, the overhead ground wire, will not be damaged in any way. Also,
There is also the advantage that it is possible to replace the melted and damaged parts, allowing them to be repaired and reused. Therefore, the present invention can provide a lightning-resistant electric wire having a lightning-proof function. In addition, in the above-mentioned embodiment, only the case where the erosion layer is provided on the outer periphery of the overhead ground wire is described, but the present invention is not limited to this, and for example, even if the erosion layer is provided on the outer periphery of the power line. good.
第１図は、本考案の耐雷電線の横断面図、第２
図は、同側面図、第３図は、溶損体の端面図であ
る。
１……架空地線、２……溶損層、６……溶損
体、７……区間。
Figure 1 is a cross-sectional view of the lightning-resistant wire of the present invention;
The figure is a side view of the same, and FIG. 3 is an end view of the melted body. 1... Overhead ground wire, 2... Erosion layer, 6... Erosion body, 7... Section.
Claims (1)
区間毎に螺旋状にあらかじめ成形された金属体
よりなる溶損体を前記架空線の全外周面を覆う
ごとくそれぞれ巻装密着してなることを特徴と
する耐雷電線。 ２ 溶損体の断面形状が梯形であることを特徴と
する実用新案登録請求の範囲第１項記載の耐雷
電線。[Claims for Utility Model Registration] 1. On the outer periphery of an overhead wire whose entire length is divided into multiple sections, a melting body made of a metal body is pre-formed in a spiral shape for each section so as to cover the entire outer periphery of the overhead wire. A lightning-resistant electric wire characterized by being wrapped closely together. 2. The lightning-resistant electric wire according to claim 1, wherein the cross-sectional shape of the melted body is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3383983U JPS59139906U (en) | 1983-03-08 | 1983-03-08 | lightning resistant wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3383983U JPS59139906U (en) | 1983-03-08 | 1983-03-08 | lightning resistant wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59139906U JPS59139906U (en) | 1984-09-19 |
| JPH0141132Y2 true JPH0141132Y2 (en) | 1989-12-06 |
Family
ID=30164611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3383983U Granted JPS59139906U (en) | 1983-03-08 | 1983-03-08 | lightning resistant wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59139906U (en) |
-
1983
- 1983-03-08 JP JP3383983U patent/JPS59139906U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59139906U (en) | 1984-09-19 |
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