JP2001186616A - Bypassing method for overhead wire - Google Patents
Bypassing method for overhead wireInfo
- Publication number
- JP2001186616A JP2001186616A JP36765999A JP36765999A JP2001186616A JP 2001186616 A JP2001186616 A JP 2001186616A JP 36765999 A JP36765999 A JP 36765999A JP 36765999 A JP36765999 A JP 36765999A JP 2001186616 A JP2001186616 A JP 2001186616A
- Authority
- JP
- Japan
- Prior art keywords
- overhead
- wire
- electric wire
- bypass
- overhead wire
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 claims description 35
- 239000004020 conductor Substances 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
Landscapes
- Electric Cable Installation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、架空電線のバイ
パス工法に係わり、特に、架空電線の活線切断および活
線再接続時におけるアークの発生を抑え得る架空電線の
バイパス工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead electric wire bypass method, and more particularly to an overhead electric wire bypass method capable of suppressing the occurrence of an arc at the time of hot wire cutting and hot wire reconnection.
【０００２】[0002]
【従来の技術】近年、電力の安定供給の見地から、架空
電線の事故復旧等の工事若しくは碍子や送配電線等のメ
ンテナンスの作業時において、需要家への送電を停止す
ることなく、工事区間若しくはメンテナンス区間の架空
電線のみの送電を停止し、その間はバイパスケーブルで
送電する、いわゆる架空電線のバイパス工法が実施され
ている。2. Description of the Related Art In recent years, from the viewpoint of stable power supply, during construction work such as restoration of an overhead power line accident or maintenance work on insulators, transmission and distribution lines, etc., power transmission to a customer has to be stopped without interruption. Alternatively, a so-called overhead wire bypass method of stopping power transmission of only overhead wires in a maintenance section and transmitting power by a bypass cable during that time is being implemented.
【０００３】図４に、このような従来の架空電線のバイ
パス工法を実施した模式図を示す。FIG. 4 is a schematic diagram showing such a conventional overhead wire bypass method.
【０００４】図４において、電柱２間には、既設の送電
線路として、３３ｋＶ級の鋼心アルミ撚線から成る架空
電線が架設されている。[0004] In FIG. 4, an overhead electric wire composed of a 33 kV-class steel core aluminum stranded wire is installed between the electric poles 2 as an existing transmission line.
【０００５】次に、この既設の架空電線のＡＢ区間（以
下、この区間を「工事区間」という。）を取り除き、他
の架空電線を張り替えるには、先ず、この架空電線の工
事区間ＡＢに、この架空電線１と略同サイズの３３ｋＶ
級のバイパスケーブル３を併設する。そして、このバイ
パスケーブル３の両端部を架空電線１の切断部Ａ、Ｂ近
傍にそれぞれ接続して、バイパスケーブル３に負荷電流
の半分程度を分流させる。そして、この状態で、すなわ
ち、活線状態で架空電線１のＡ点およびＢ点を切断し
て、ＡＢ区間の架空電線１を取り除き、替わりにこの区
間ＡＢに、他の健全な架空電線を張り替え、活線状態で
再接続する。このようにして、工事区間ＡＢにおける既
設の架空電線の張り替え工事が完了する。[0005] Next, in order to remove the AB section of the existing overhead electric wire (hereinafter, this section is referred to as "construction section") and replace another overhead electric wire, first, the work section AB of the overhead electric wire must be replaced. 33kV of the same size as this overhead electric wire 1
Class bypass cable 3 is installed. Then, both ends of the bypass cable 3 are connected to the vicinity of the cut portions A and B of the overhead electric wire 1, respectively, and about half of the load current is diverted to the bypass cable 3. Then, in this state, that is, in the live state, the points A and B of the overhead electric wire 1 are cut, the overhead electric wire 1 in the AB section is removed, and another healthy overhead electric wire is replaced in this section AB instead. , Reconnect in the hot state. In this way, the replacement work of the existing overhead electric wire in the construction section AB is completed.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、従来の
架空電線のバイパス工法においては、例えば、バイパス
ケーブル３の電気抵抗が架空電線１のそれと同程度であ
るとすると、負荷電流の半分程度が工事区間ＡＢの架空
電線１に、残りの半分程度がバイパスケーブル３に流れ
ることになる。そして、負荷電流の半分程度が流れてい
る状態で、すなわち、活線状態で、工事区間ＡＢ内の架
空電線１を切断すると、切断部にアークが発生し、人災
に及ぶ可能性があった。特に、架空電線１に流れる負荷
電流が大きい場合においては、これに比例してアークの
発生量も増大し、架空電線１の活線切断および活線再接
続作業に危険を伴うという難点があった。However, in the conventional overhead electric wire bypass method, if the electric resistance of the bypass cable 3 is substantially the same as that of the overhead electric wire 1, for example, about half of the load current is reduced in the construction section. About half of the remaining half flows through the overhead cable 1 of the AB and the bypass cable 3. When the overhead electric wire 1 in the construction section AB is cut in a state where about half of the load current is flowing, that is, in a live state, an arc is generated in the cut portion, and there is a possibility of causing human injury. In particular, when the load current flowing through the overhead electric wire 1 is large, the amount of arc generation increases in proportion to this, and there is a problem that the hot wire cutting and the hot wire reconnection work of the overhead electric wire 1 involves danger. .
【０００７】このため、バイパスケーブル３の導体サイ
ズを架空電線１のそれよりも太くして、すなわち、バイ
パスケーブル３の導体の電気抵抗を架空電線１のそれよ
りも小さくして、架空電線１側に流れる負荷電流を少な
くし、アークの発生を抑えた状態で、既設の架空電線１
の活線切断および活線再接続作業を行なうバイパス工法
も考えられている。For this reason, the conductor size of the bypass cable 3 is made larger than that of the overhead electric wire 1, that is, the electric resistance of the conductor of the bypass cable 3 is made smaller than that of the overhead electric wire 1, and The load current flowing through the existing overhead electric wire 1 is reduced while the occurrence of arc is suppressed.
A bypass method of performing hot-line cutting and hot-line reconnection work has also been considered.
【０００８】しかしながら、かかる架空電線のバイパス
工法においては、バイパスケーブルの導体サイズが太く
なるにつれてバイパスケーブルが重くなり、またバイパ
スケーブルの外径も太くなることから、長尺のバイパス
ケーブルの取り扱いが煩雑になり、ひいては、既設の架
空電線の活線切断および活線再接続作業に大変な労力を
伴うという難点があった。However, in such an overhead wire bypass method, since the bypass cable becomes heavier as the conductor size of the bypass cable increases, and the outer diameter of the bypass cable also increases, handling of the long bypass cable becomes complicated. As a result, there has been a problem that a great deal of labor is required for hot wire cutting and hot wire reconnection work of the existing overhead electric wire.
【０００９】本発明は、上述の難点を解決するためにな
されたもので、架空電線の活線切断および活線再接続作
業時におけるアークの発生を抑え得る架空電線のバイパ
ス工法を提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an overhead electric wire bypass method capable of suppressing the occurrence of an arc at the time of hot wire cutting and hot wire reconnection. The purpose is.
【００１０】[0010]
【課題を解決するための手段】このような目的を達成す
るため、本発明の架空電線のバイパス工法は、架空電線
の工事区間の両側部近傍に、この架空電線の工事区間内
と工事区間外間に跨って、前記工事区間内の架空電線に
流れる電流よりも多く電流が流れる電流の分流線路をそ
れぞれ形成し、これらの分流線路間にバイパスケーブル
を接続した後、前記工事区間の架空電線の切断工事を行
なうことを特徴としている。In order to achieve the above object, an overhead electric wire bypass method according to the present invention employs an overhead electric wire bypass section near both sides of an overhead electric wire construction section and between the overhead section and the outside of the construction section. After shunting the overhead wires in the construction section, forming shunt lines of currents in which more current flows than the overhead wires in the construction section, connecting bypass cables between these shunt lines. It is characterized by construction work.
【００１１】このような架空電線のバイパス工法によれ
ば、工事区間内の架空電線よりも分流線路の方へ負荷電
流を多く流すことができることから、架空電線の切除時
および再接続時におけるアーク電流の発生を抑えること
ができ、ひいては、架空電線の活線切断および活線再接
続作業を安全に行なうことができる。According to such an overhead wire bypass method, since a larger load current can flow toward the branch line than the overhead wire in the construction section, the arc current at the time of cutting and reconnecting the overhead wire can be reduced. Can be suppressed, and the hot wire disconnection and hot wire reconnection work of the overhead electric wire can be performed safely.
【００１２】[0012]
【発明の実施の形態】以下、本発明の架空電線のバイパ
ス工法を適用した好ましい実施の形態について、図面を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments to which the overhead wire bypass method of the present invention is applied will be described below with reference to the drawings.
【００１３】図１は、架空電線およびバイパスケーブル
の架設状況を示す模式図、図２は、本発明による架空電
線のバイパス工法の実施状況を示す模式図である。な
お、これらの図において、図４と共通する部分には同一
の符号が付されている。FIG. 1 is a schematic diagram showing the construction of overhead wires and bypass cables, and FIG. 2 is a schematic diagram showing the implementation of the overhead wire bypass method according to the present invention. Note that, in these drawings, the same reference numerals are given to portions common to FIG.
【００１４】図１において、電柱２間に既設の架空電線
１が架設されている点は、図４に示す従来の架空電線１
の架設状況と同一である。なお、この実施例において
は、架空電線１として、導体断面積が９５ｍｍ2で３３
ｋＶ級の鋼心アルミ撚線が使用され、この鋼心アルミ撚
線には、２００Ａ程度の負荷電流が流れている。In FIG. 1, an existing overhead electric wire 1 is installed between utility poles 2 in the conventional overhead electric wire 1 shown in FIG.
Is the same as the erection situation. In this embodiment, the overhead electric wire 1 has a conductor cross-sectional area of 95 mm 2 and a length of 33 mm.
A kV-class steel core aluminum stranded wire is used, and a load current of about 200 A flows through the steel core aluminum stranded wire.
【００１５】次に、工事区間ＡＢ内の架空電線１を活線
状態で切除して、この区間ＡＢに他の健全な架空電線
（不図示）を活線状態で張り替えて接続する工法につい
て説明する。Next, a description will be given of a construction method in which the overhead electric wire 1 in the construction section AB is cut off in a live state, and another healthy overhead electric line (not shown) is connected to the section AB in a live state. .
【００１６】図２において、先ず、架空電線１の工事区
間ＡＢの両側部近傍に、すなわちＡ点およびＢ点の近傍
に、それぞれ、この架空電線１の工事区間内のＡ１部、
Ｂ１部と工事区間外のＡ２部、Ｂ２部間に跨って、架空
電線１の電流の分流線路４Ａ、４Ｂを形成する。In FIG. 2, first, in the vicinity of both sides of the construction section AB of the overhead electric wire 1, that is, in the vicinity of the points A and B, respectively, A1 portion in the construction section of the overhead electric wire 1,
The shunt lines 4A and 4B for the current of the overhead electric wire 1 are formed so as to straddle the portion B1 and the portions A2 and B2 outside the construction section.
【００１７】電流の分流線路４Ａ、４Ｂは、一端部に接
続クランプ（不図示）を有し、他端部に羽子板端末（不
図示）を有する、いわゆる無遮蔽構成の３３ｋＶ級のゴ
ム絶縁電線からなる一対のジャンパー線５Ａ１，５Ａ
２、５Ｂ１、５Ｂ２と、一端部に気中終端部８Ａ１，８
Ａ２、８Ｂ１、８Ｂ２を有し、他端部がそれぞれ工事用
開閉器７Ａ１，７Ａ２、７Ｂ１、７Ｂ２に接続された、
いわゆる遮蔽層付きの一対の引下げ用ケーブル６Ａ１，
６Ａ２、６Ｂ１、６Ｂ２とを備えている。しかして、一
対のジャンパー線５Ａ１，５Ａ２、５Ｂ１、５Ｂ２の各
一端部を、それぞれ、工事区間内のＡ１部、Ｂ１部と工
事区間外のＡ２部、Ｂ２部に、各他端部を、それぞれ、
気中終端部８Ａ１，８Ａ２、８Ｂ１、８Ｂ２接続し、更
に、一対の工事用開閉器７Ａ１，７Ａ２、７Ｂ１、７Ｂ
２をリード線９Ａ１，９Ａ２、９Ｂ１、９Ｂ２を介して
Ｔ型接続器１０Ａ、１０Ｂに接続することにより、負荷
電流の分流線路４Ａ、４Ｂが形成される。なお、この実
施例においては、各ジャンパー線５Ａ１，５Ａ２、５Ｂ
１、５Ｂ２および引下げケーブル６Ａ１，６Ａ２、６Ｂ
１、６Ｂ２として、その導体サイズが架空電線１の導体
サイズよりも太いものが使用され、後述するバイパスケ
ーブル３として、架空電線１の導体サイズと略同等のも
のが使用されている。図中、１１Ａ、１１Ｂは引下げケ
ーブルの終端支持金具を示している。The current shunt lines 4A and 4B are formed by a so-called unshielded rubber insulated wire of 33 kV class having a connection clamp (not shown) at one end and a blade terminal (not shown) at the other end. Pair of jumper wires 5A1, 5A
2, 5B1 and 5B2, and one end portion has an air end portion 8A1, 8
A2, 8B1, 8B2, the other end was connected to the construction switches 7A1, 7A2, 7B1, 7B2, respectively.
A pair of pull-down cables 6A1 with a so-called shielding layer
6A2, 6B1, and 6B2. Thus, one end of each of the pair of jumper wires 5A1, 5A2, 5B1, 5B2 is respectively connected to the A1 part and B1 part in the construction section and the A2 part and B2 part outside the construction section, and the other ends are respectively. ,
Aerial terminal portions 8A1, 8A2, 8B1, 8B2 are connected, and a pair of construction switches 7A1, 7A2, 7B1, 7B are connected.
2 is connected to the T-connectors 10A and 10B via the lead wires 9A1, 9A2, 9B1 and 9B2, thereby forming load current shunt lines 4A and 4B. In this embodiment, each jumper wire 5A1, 5A2, 5B
1, 5B2 and pull-down cables 6A1, 6A2, 6B
1, 6B2 whose conductor size is larger than the conductor size of the overhead electric wire 1 is used. As a bypass cable 3 described later, a conductor approximately equivalent to the conductor size of the overhead electric wire 1 is used. In the figure, reference numerals 11A and 11B denote end fittings for the pull-down cable.
【００１８】次に、架空電線１の工事区間ＡＢに、架空
電線１の送配電系統の電圧と同一でかつ架空電線１と略
同サイズの３３ｋＶ級のバイパスケーブル３を架設す
る。この実施例においては、架空電線１として、９５ｍ
ｍ2の３３ｋＶ級鋼心アルミ撚線が使用されていること
から、バイパスケーブル３としては、例えば、導体断面
積が９５ｍｍ2相当の３３ｋＶ級架橋ポリエチレン絶縁
ビニル−スケーブル若しくは３３ｋＶ級エチレンプロピ
レンゴム絶縁クロロプレンシースケーブル等が使用され
る。Next, a 33 kV-class bypass cable 3 having the same voltage as that of the power transmission and distribution system of the overhead electric wire 1 and substantially the same size as the overhead electric wire 1 is installed in the construction section AB of the overhead electric wire 1. In this embodiment, the overhead wire 1 is 95 m
Since a 33 kV class steel core aluminum stranded wire of m 2 is used, the bypass cable 3 is, for example, a 33 kV class cross-linked polyethylene insulated vinyl-cable or a 33 kV class ethylene propylene rubber insulated with a conductor cross-sectional area of 95 mm 2. A chloroprene sheath cable or the like is used.
【００１９】かかるバイパスケーブル３は、図１に示す
ように、工事区間の一端側Ｂに配置したドラム１１から
繰り出されるバイパスケーブル３の先端に延線ロープ１
２を接続し、これを工事区間の他端側Ａに配置したウィ
ンチ１３で延線することにより架設される。なお、バイ
パスケーブル３は、工事区間ＡＢが長径間の場合におい
ては、図２に示すように、短尺（４０ｍ程度）の両端末
付のバイパスケーブルを、中間接続体１７を介して接続
したもので構成される。図中、１４はドラム１１を積載
したバイパスケーブル車、１５は各電柱２に配置した延
線用ローラ類、１６はケーブル引留クランプをそれぞれ
示している。As shown in FIG. 1, such a bypass cable 3 is connected to a leading end of a bypass cable 3 fed from a drum 11 disposed at one end B of a construction section.
2 is connected, and is extended by a winch 13 arranged on the other end side A of the construction section. In the case where the construction section AB has a long diameter, the bypass cable 3 is a short (about 40 m) bypass cable with both terminals connected via the intermediate connector 17 as shown in FIG. Be composed. In the drawing, reference numeral 14 denotes a bypass cable car on which the drum 11 is mounted, reference numeral 15 denotes a wire extension roller disposed on each utility pole 2, and reference numeral 16 denotes a cable retaining clamp.
【００２０】しかして、架空電線１の工事区間ＡＢに併
設したバイパスケーブル３の両端部を、Ｔ型接続器１０
Ａ、１０Ｂにそれぞれ接続し、各工事用開閉器７Ａ１，
７Ａ２、７Ｂ１、７Ｂ２のスイッチをそれぞれ投入（Ｏ
Ｎ状態）すると、分流線路４Ａ、４Ｂ側に、架空電線１
に流れていた負荷電流の一部が流れることになる。この
実施例においては、架空電線１に２００Ａ程度の負荷電
流が流れているものとすると、分流線路４Ａ、４Ｂ側に
１４０Ａ程度の電流が流れるように構成されている。Then, both ends of the bypass cable 3 attached to the construction section AB of the overhead electric wire 1 are connected to the T-type connector 10.
A, 10B respectively connected to each construction switch 7A1,
7A2, 7B1, and 7B2 are turned on (O
N state), the overhead electric wire 1 is connected to the branch lines 4A and 4B.
A part of the load current flowing through In this embodiment, assuming that a load current of about 200 A flows through the overhead electric wire 1, a current of about 140 A flows through the branch lines 4A and 4B.
【００２１】そして、活線状態で、すなわち、架空電線
１の工事区間ＡＢ内に流れる電流が少ない状態で、架空
電線１のＡ、Ｂを切断して、ＡＢ区間の架空電線１を取
り除き、替わりにこの区間ＡＢに他の健全な架空電線を
張り替え、活線状態で再接続する。Then, in a live state, that is, in a state where the current flowing in the construction section AB of the overhead electric wire 1 is small, the overhead wires 1 and A are cut, and the overhead electric wire 1 in the AB section is removed. Then, another healthy overhead electric wire is replaced in this section AB, and reconnected in a live state.
【００２２】以上の架空電線の張り替え工事が終了した
後、各工事用開閉器７Ａ１，７Ａ２、７Ｂ１、７Ｂ２の
スイッチを全て開放（オフ状態）し、次いで、バイパス
ケーブル３および分流線路４Ａ、４Ｂを分離・撤去す
る。このようにして、工事区間ＡＢにおける架空電線１
の張り替え工事が完了する。After the above overhead wire replacement work is completed, the switches of the work switches 7A1, 7A2, 7B1, 7B2 are all opened (off state), and then the bypass cable 3 and the branch lines 4A, 4B are connected. Separate and remove. Thus, the overhead electric wire 1 in the construction section AB
Replacing work is completed.
【００２３】図３は、本発明の他の実施例に係る架空電
線のバイパス工法の模式図を示している。なお、図３に
おいて、図２と共通する部分には同一の符号が付されて
いる。FIG. 3 is a schematic view of a method of bypassing an overhead electric wire according to another embodiment of the present invention. Note that, in FIG. 3, the same parts as those in FIG. 2 are denoted by the same reference numerals.
【００２４】この実施例においては、バイパスケーブル
３を柱上に架設するのに替えて、バイパスケーブル３′
を地上に布設している。この実施例によれば、引留クラ
ンプが不要で、コストダウンとなる等の利点を有してい
る。また、工事区間の片端に延線車を設置できない状況
下でも人力で延線できるという利点がある。In this embodiment, the bypass cable 3 'is replaced with a bypass cable 3'
Is laid on the ground. According to this embodiment, there is an advantage in that a retaining clamp is not required and the cost is reduced. In addition, there is an advantage that the line can be extended by human power even in a situation where a line extension vehicle cannot be installed at one end of the construction section.
【００２５】なお、前述の実施例においては、各ジャン
パー線および引下げケーブルとしてとして、架空電線の
導体サイズよりも太いものを使用した場合について述べ
ているが、本発明はこれに限定されず、分流線路の電気
抵抗が小さいものであれば、分流線路側に負荷電流を多
く流すことができ、その効果が発揮される。In the above-described embodiment, the case where the jumper wire and the down cable are larger than the conductor size of the overhead electric wire is used. If the electric resistance of the line is small, a large load current can flow on the shunt line side, and the effect is exhibited.
【００２６】[0026]
【発明の効果】以上の説明から明らかなように、本発明
の架空電線のバイパス工法によれば、架空電線よりも分
流線路の方に負荷電流を多く流すことができることか
ら、架空電線の活線切除時および活線再接続時における
アークの発生を抑えることができ、ひいては架空電線の
張り替え接続作業を安全に行なうことができる。As is clear from the above description, according to the overhead wire bypass method of the present invention, a larger load current can flow through the shunt line than the overhead wire. It is possible to suppress the occurrence of an arc at the time of cutting and reconnecting the hot wire, and thus it is possible to safely carry out the reconnection work of the overhead electric wire.
【図１】架空電線及びバイパスケーブルの架設状況を示
す模式図。FIG. 1 is a schematic diagram showing the state of erection of overhead electric wires and bypass cables.
【図２】本発明の架空電線のバイパス工法の一実施状況
を示す模式図。FIG. 2 is a schematic diagram showing one embodiment of an overhead electric wire bypass method according to the present invention.
【図３】本発明の架空電線のバイパス工法の他の実施状
況を示す模式図。FIG. 3 is a schematic view showing another embodiment of the overhead wire bypass method according to the present invention.
【図４】従来の架空電線のバイパス工法の実施状況を示
す模式図。FIG. 4 is a schematic view showing an implementation state of a conventional overhead electric wire bypass method.
１・・・・・・・・・架空電線 ２・・・・・・・・・電柱 ３・・・・・・・・・バイパスケーブル ４Ａ、４Ｂ・・・分流線路 1 ... overhead wire 2 ... pole 3 ... bypass cable 4A, 4B ... shunt line
Claims (4)
架空電線の工事区間内と工事区間外間に跨って、前記工
事区間内の架空電線に流れる電流よりも多く電流が流れ
る電流の分流線路をそれぞれ形成し、これらの分流線路
間にバイパスケーブルを接続した後、前記工事区間の架
空電線の切断工事を行なうことを特徴とする架空電線の
バイパス工法。1. A shunt of a current, which flows in the vicinity of both sides of a construction section of an overhead electric wire, between the inside of the construction section and the outside of the construction section of the overhead electric wire, the current flowing more than the current flowing through the overhead section in the construction section. A method of bypassing an overhead electric wire, comprising forming a line, connecting a bypass cable between these branch lines, and cutting the overhead line in the construction section.
架空電線の電気抵抗よりも小さい電線・ケーブルが使用
されていることを特徴とする請求項１記載の架空電線の
バイパス工法。2. An overhead wire bypass method according to claim 1, wherein an electric wire or cable having an electric resistance smaller than an electric resistance of said overhead electric wire is used as said branch line.
れていることを特徴とする請求項１又は請求項２記載の
架空電線のバイパス工法。3. The method according to claim 1, wherein the bypass cable is installed on a utility pole.
ていることを特徴とする請求項１又は請求項２記載の架
空電線のバイパス工法。4. The overhead wire bypass method according to claim 1, wherein the bypass cable is laid on the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36765999A JP2001186616A (en) | 1999-12-24 | 1999-12-24 | Bypassing method for overhead wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36765999A JP2001186616A (en) | 1999-12-24 | 1999-12-24 | Bypassing method for overhead wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001186616A true JP2001186616A (en) | 2001-07-06 |
Family
ID=18489878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36765999A Withdrawn JP2001186616A (en) | 1999-12-24 | 1999-12-24 | Bypassing method for overhead wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001186616A (en) |
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| US20090195083A1 (en) * | 2003-08-29 | 2009-08-06 | Clifford William Devine | Live conductor stringing and splicing method and apparatus |
| CN101958519A (en) * | 2010-09-27 | 2011-01-26 | 上海电力带电作业技术开发有限公司 | Method for transforming tangent tower of double-circuit double-bundle transmission lines by lifting in electrified mode in another place |
| JP2011182541A (en) * | 2010-03-01 | 2011-09-15 | Furukawa Electric Co Ltd:The | Facility and method for rebuilding steel tower |
| CN103806740A (en) * | 2013-12-12 | 2014-05-21 | 国家电网公司 | Insertion type erection method for electrified pole |
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1999
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| JP2011182541A (en) * | 2010-03-01 | 2011-09-15 | Furukawa Electric Co Ltd:The | Facility and method for rebuilding steel tower |
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| CN103806740B (en) * | 2013-12-12 | 2015-01-14 | 国家电网公司 | Insertion type erection method for electrified pole |
| CN103806740A (en) * | 2013-12-12 | 2014-05-21 | 国家电网公司 | Insertion type erection method for electrified pole |
| CN105986699A (en) * | 2015-01-27 | 2016-10-05 | 国家电网公司 | Line changing construction method for double circuit lines on the same tower in power outage state at different time |
| AU2016246066B2 (en) * | 2015-04-09 | 2020-09-17 | Quanta Associates, L.P. | Conductor as a tool |
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