JP2015149145A - power distribution cable and signal system - Google Patents

power distribution cable and signal system Download PDF

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JP2015149145A
JP2015149145A JP2014020330A JP2014020330A JP2015149145A JP 2015149145 A JP2015149145 A JP 2015149145A JP 2014020330 A JP2014020330 A JP 2014020330A JP 2014020330 A JP2014020330 A JP 2014020330A JP 2015149145 A JP2015149145 A JP 2015149145A
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distribution cable
power distribution
layer
fire
conductor
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弘記 吉野
Hiroki Yoshino
弘記 吉野
啓 貝塚
Hiroshi Kaizuka
啓 貝塚
和生 山下
Kazuo Yamashita
和生 山下
山口 晃
Akira Yamaguchi
晃 山口
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Furukawa Electric Co Ltd
East Japan Railway Co
Furukawa Electric Industrial Cable Co Ltd
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Furukawa Electric Co Ltd
East Japan Railway Co
Furukawa Electric Industrial Cable Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a power distribution cable which is installed along an orbit for feeding electric power to a traffic apparatus or the like and which can secure conduction even if it is burnt by a wayside fire without requiring time and cost.SOLUTION: There is provided a power distribution cable 100 comprising: a conductor 1; an insulation layer 3 applied to the outside of the conductor 1; and a shield layer 2 applied to the outside of the insulation layer 3. Further, a fire-resistant layer 2 having a thickness of above 2.2 mm is applied to a space between the conductor 1 and the insulation layer 3. Thus, the fire resistant layer 2 is not subjected to insulation breakdown even after it is burnt by a wayside fire, so that a short-circuit between the conductor 1 and the shield layer 4 is not caused.

Description

本発明は、列車を運行するための設備に電力を供給するための配電ケーブル、およびこの配電ケーブルを用いた信号システムに関する。   The present invention relates to a power distribution cable for supplying power to equipment for operating a train, and a signal system using the power distribution cable.

線路上の各列車は、上り方向に向かって走行していたり、下り方向に向かって走行していたり、高速で走行していたり、徐行していたり、駅に停車していたりと様々な動作をしている。しかし、線路の各所には、信号機等の、走行速度や所定区間への進入の可否についての指示を与える設備(以下信号機等)が設けられ、各列車は信号機等からの指示に従って走行するので、各列車は衝突することなく同一線路上を円滑に走行することができる。逆に、信号機等が機能しない状態では、列車の運行は極めて困難となる。   Each train on the track is traveling in the upward direction, traveling in the downward direction, traveling at a high speed, traveling slowly, or stopping at the station. doing. However, each place on the track is equipped with equipment (hereinafter, traffic lights, etc.) that gives instructions on traveling speed and whether or not to enter a predetermined section, such as traffic lights, and each train travels according to instructions from traffic lights, etc. Each train can travel smoothly on the same track without colliding. On the other hand, in the state where the traffic light etc. does not function, the train operation becomes extremely difficult.

ところで、信号機等を機能させるには電力が必要となる。このため、線路には、軌道に沿って配電ケーブルが配設され、信号機等はこの配電ケーブルから電力の供給を受けるようになっている(特許文献1参照)。配電ケーブルには、主に、導体と、導体の外側に施す絶縁層と、絶縁層の外側に施す遮蔽層と、遮蔽層の外側に施すシースとで構成される6.6kV架橋ポリエチレン絶縁ビニルシースケーブル(以下6.6kVCVケーブル)が用いられる。   By the way, electric power is required to make a traffic light or the like function. For this reason, a power distribution cable is disposed along the track on the track, and a traffic light or the like is supplied with power from the power distribution cable (see Patent Document 1). The distribution cable mainly includes a conductor, an insulating layer provided outside the conductor, a shielding layer provided outside the insulating layer, and a sheath provided outside the shielding layer, and a 6.6 kV cross-linked polyethylene insulated vinyl sheath cable. (Hereinafter, 6.6 kVCV cable) is used.

特開2006−320139号公報JP 2006-320139 A

ところで、都市部においては、線路や配電ケーブルの近傍にまで建物が設けられていることが多い。しかし、6.6kVCVケーブルは耐火性能を有していないため、これらの建物から出火(いわゆる沿線火災が発生)すると、配電ケーブルの絶縁層が焼損して導体と遮蔽層とが短絡し、信号機等へ電力が供給できなくなるおそれがある。   By the way, in urban areas, buildings are often provided up to the vicinity of tracks and power distribution cables. However, since the 6.6kVCV cable does not have fire resistance, when a fire breaks out from these buildings (so-called fire along the line), the insulation layer of the power distribution cable is burned and the conductor and the shielding layer are short-circuited. There is a risk that power cannot be supplied to

この問題に対処するため、発明者は、(1)配設されている配電ケーブルに耐火シートを巻き付ける、(2)配設されている配電ケーブルの配設ルートを変更する、(3)6.6kVCVケーブルの外側にあらかじめ耐火層を設けたものを用いる、の3つの方法について検討した。その結果、(1)については、高所作業なるので巻き付け時の作業および巻き付け後のメンテナンスに手間がかかる、長期間の使用に耐えない、コストが高い、沿線の美観を損なう、といった問題点が見つかった。(2)については、沿線火災が想定される都市部の線路においては、新たな用地を確保することが困難、トラフ等も付設する必要が生じコストが高い、といった問題が見つかった。(3)については、耐火層がケーブルシースの外側にあり、耐火層の使用量が多くなるため、製造コストが高くなるという問題が見つかった。   In order to cope with this problem, the inventor (1) wraps a fireproof sheet around the installed distribution cable, (2) changes the arrangement route of the installed distribution cable, (3) 6. Three methods of using a fireproof layer provided in advance on the outside of the 6 kVCV cable were examined. As a result, as for (1), since it is a work at a high place, there are problems such as troublesome work during winding and maintenance after winding, long-term use, high cost, and loss of the beauty of the railway. found. As for (2), it was found that it was difficult to secure a new site on a railway line in an urban area where a fire along the line was expected, and that it was necessary to attach a trough and the cost was high. Regarding (3), the problem was that the manufacturing cost was high because the fireproof layer was outside the cable sheath and the amount of fireproof layer used was increased.

次に、発明者は、従来、屋外用(鉄道用を含む)の配電ケーブルとしては用いられてこなかった屋内用耐火ケーブルに着目した。屋内用耐火ケーブルは、導体と絶縁層との間に耐火層を備えることにより、火災が発生して絶縁層が焼損しても、導体と遮蔽層との間の絶縁抵抗および絶縁耐力を保ち、避難設備や消火設備への電力供給を確保できるようにしたものである。この屋内用耐火ケーブルに燃焼試験(IEC60332−21;燃焼温度750℃、燃焼時間90分、消火後20時間の通電)を行い、水で消火した後に再び通電したところ、屋内用耐火ケーブルの導体の外側に施す耐火層が絶縁破壊され、導体と、耐火層の外側にある遮蔽層が短絡してしまった。このような結果となったのは、屋内用耐火ケーブルは、火災の発生中(概ね30分を想定)さえ通電を確保できればいいように設計されたもので、そもそも消火後の通電性能までは求められていないためである。
このように、従来は、高いコストと多大な手間をかける以外に、沿線火災によって配電ケーブルの通電が止まってしまうのを防ぐ手立てがなかった。
Next, the inventor has paid attention to an indoor fireproof cable that has not been used as a distribution cable for outdoor use (including railway use). The indoor fireproof cable is equipped with a fireproof layer between the conductor and the insulation layer, so that even if a fire occurs and the insulation layer burns out, the insulation resistance and dielectric strength between the conductor and the shielding layer are maintained, The power supply to evacuation facilities and fire extinguishing facilities can be secured. This indoor fireproof cable was subjected to a combustion test (IEC60332-21; combustion temperature 750 ° C., combustion time 90 minutes, fire-extinguishing 20 hours after fire extinguishing), fire-extinguished with water, and then turned on again. The refractory layer applied to the outside was broken down, and the conductor and the shielding layer outside the refractory layer were short-circuited. The result is that the indoor fireproof cable is designed so that it can be energized even during the occurrence of a fire (assuming approximately 30 minutes). It is because it is not done.
As described above, conventionally, there is no way to prevent the power distribution cable from being turned off due to a fire along the line, in addition to high cost and great effort.

本発明は、上記課題に鑑みてなされたもので、軌道に沿って配設され、信号機等へ電力を供給する配電ケーブルにおいて、手間とコストをかけることなく、沿線火災により焼損した後も通電を確保できるようにすることを目的とする。   The present invention has been made in view of the above problems, and in a power distribution cable that is arranged along a track and supplies power to a traffic light or the like, it is energized even after it is burned out by a fire along the line, without incurring labor and costs. The purpose is to ensure it.

発明者は、屋内用耐火ケーブルに、配電ケーブルに必要な性能を備えさせるため、試行錯誤を重ねた結果、屋内用耐火ケーブルの導体を被覆する耐火層の厚さを工夫するという着想に至った。図4は、開発過程で得た、耐火層の厚さとIEC60332−21で規定された燃焼試験後の最小絶縁抵抗との関係を示したグラフである。図4に示したように、耐火層の厚さが2.2mm以下の場合には、最小絶縁抵抗が低すぎて(2MΩ未満で)短絡してしまうレベルであったのに対し、厚さを2.5mmに増やしたところ、突如、燃焼後も短絡を起こさないだけの絶縁抵抗(11MΩ以上)を維持できるようになった。また、厚さを更に2.9mmに増やしたところ、絶縁抵抗が更に高まった。これらの結果から、耐火層の厚さを所定以上にすることで焼損後も通電性能を持続できるようになるという知見を得て、本発明に至った。   The inventor came up with the idea of devising the thickness of the refractory layer covering the conductor of the indoor refractory cable as a result of repeated trial and error to provide the indoor refractory cable with the performance required for the distribution cable. . FIG. 4 is a graph showing the relationship between the thickness of the refractory layer and the minimum insulation resistance after the combustion test specified in IEC 60332-21, obtained during the development process. As shown in FIG. 4, when the thickness of the refractory layer is 2.2 mm or less, the minimum insulation resistance is too low (less than 2 MΩ), and the level is shorted. When the thickness was increased to 2.5 mm, it was suddenly possible to maintain an insulation resistance (11 MΩ or more) sufficient not to cause a short circuit even after combustion. Further, when the thickness was further increased to 2.9 mm, the insulation resistance further increased. From these results, the inventors have obtained the knowledge that the current-carrying performance can be maintained even after burning by setting the thickness of the refractory layer to a predetermined value or more, and the present invention has been achieved.

本発明は、導体と、前記導体の外側に施す絶縁層と、前記絶縁層の外側に施す遮蔽層と、を備えた配電ケーブルであって、前記導体と前記絶縁層との間に、厚さ2.2mm超の耐火層が施されていることを特徴とする。   The present invention is a distribution cable comprising a conductor, an insulating layer applied to the outside of the conductor, and a shielding layer applied to the outside of the insulating layer, wherein the thickness is between the conductor and the insulating layer. A refractory layer exceeding 2.2 mm is provided.

このようにすれば、沿線火災の発生・消火後に通電を再開しても、耐火層が絶縁破壊せず、導体と遮蔽層とが短絡することがないので、焼損前と同様に通電が可能となる。このため、軌道の一方側にのみ複数の配電ケーブルが配設されている箇所において、少なくとも何れかの配電ケーブルを本発明に係る配電ケーブルとすれば、当該箇所において沿線火災が発生し、全ての配電ケーブルが焼損した後であっても、本発明に係る配電ケーブルによって通電が確保されるので、列車の運行を速やかに再開することができる。
また、沿線火災の消火後から少なくとも20時間は通電を継続することができるので、その日の営業時間は焼損した配電ケーブルを用いたまま列車の運行を行い、営業時間の終了後に交換作業を行うことができる。従って、列車の運行を中断させることなく復旧を行うことができる。
In this way, even if energization is resumed after the occurrence of a fire along the line, the refractory layer will not break down and the conductor and shielding layer will not be short-circuited. Become. For this reason, in a place where a plurality of distribution cables are arranged only on one side of the track, if at least one of the distribution cables is a distribution cable according to the present invention, a line-side fire occurs in the place, Even after the power distribution cable is burned out, power distribution is ensured by the power distribution cable according to the present invention, so that the operation of the train can be resumed promptly.
In addition, since energization can be continued for at least 20 hours after the fire along the railway line is extinguished, the train must be operated with the burned distribution cable during the business hours of the day, and replacement must be performed after the business hours are over. Can do. Therefore, recovery can be performed without interrupting the train operation.

なお、望ましくは、上記発明において、前記耐火層は、厚さ0.18mmのマイカテープが14層以上積層されたものにするとよい。
このようにすれば、市販のマイカテープを導体に巻き付けるだけで容易に耐火層を形成することができる。
Desirably, in the above-described invention, the fireproof layer is formed by laminating 14 or more layers of mica tape having a thickness of 0.18 mm.
If it does in this way, a fireproof layer can be easily formed only by winding a commercially available mica tape around a conductor.

また、本発明は、軌道の敷設方向に沿って配設された配電ケーブルと、前記軌道の側方に設けられるとともに、前記配電ケーブルに接続されて電力の供給を受ける信号機と、を備える信号システムであって、前記配電ケーブルに、上記の配電ケーブルを用いたことを特徴とする。
このようにすれば、沿線火災により配線ケーブルが焼損した後も、配電ケーブルが通電を確保するので、列車の運行を速やかに再開することができる。
In addition, the present invention provides a signal system comprising: a power distribution cable disposed along a track laying direction; and a signal device provided on a side of the track and connected to the power distribution cable to receive power. Then, the power distribution cable described above is used as the power distribution cable.
If it does in this way, even after a wiring cable burns out by a fire along a line, since a distribution cable ensures energization, operation of a train can be restarted promptly.

本発明によれば、軌道に沿って配設され、信号機等へ電力を供給する配電ケーブルにおいて、手間とコストをかけることなく、沿線火災により焼損した後も通電を確保することができる。   According to the present invention, in a distribution cable that is arranged along a track and supplies electric power to a traffic light or the like, it is possible to ensure energization even after being burned out due to a fire along the line, without taking time and cost.

本発明の実施形態に係る配電ケーブルの先端部を示した斜視図である。It is the perspective view which showed the front-end | tip part of the power distribution cable which concerns on embodiment of this invention. 図1の配電ケーブルの耐火試験を行った結果を示す表であり、(a)は耐火層のマイカテープを7枚巻(14層)とした場合の結果、(b)は8枚巻(16層)とした場合の結果である。It is a table | surface which shows the result of having done the fire resistance test of the power distribution cable of FIG. 1, (a) is a result when the mica tape of a fireproof layer is made into 7 sheets (14 layers), (b) is 8 sheets (16 It is a result in the case of layer). 都市部における配電ケーブルの配設例を示した図である。It is the figure which showed the example of arrangement | positioning of the power distribution cable in an urban area. 耐火層の厚さとIEC60332−21で規定された燃焼試験後の最小絶縁抵抗との関係を示したグラフである。It is the graph which showed the relationship between the thickness of a fireproof layer, and the minimum insulation resistance after the combustion test prescribed | regulated by IEC60332-21.

以下、図面を参照して、本発明の実施の形態について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

〔配電ケーブルの構成〕
まず、本発明の実施形態に係る配電ケーブルの具体的構成について説明する。
配電ケーブル100は、図1に示すように、高圧耐火ケーブル10a,10b,10cを3本束ねたものとなっている。各高圧耐火ケーブル10a,10b,10cの構成は、識別するための色分け(例えば赤、青、黄)がなされている点を除き何れも同様である。
各高圧耐火ケーブル10a,10b,10cは、中心の導体1、導体1を被覆する耐火層2、耐火層2の外側に施す絶縁層3、絶縁層3の外側に施す半導電性テープ4、半導電性テープ4の外側に施す遮蔽層5、遮蔽層5を外側から固定する押えテープ6、押えテープ6を外側から被覆し、高圧耐火ケーブル10a,10b,10cの表層部をなすシース7とで構成されている。
[Configuration of distribution cable]
First, a specific configuration of the power distribution cable according to the embodiment of the present invention will be described.
As shown in FIG. 1, the power distribution cable 100 is a bundle of three high-pressure fireproof cables 10a, 10b, 10c. The configurations of the high-pressure fireproof cables 10a, 10b, and 10c are the same except that they are color-coded for identification (for example, red, blue, and yellow).
Each high voltage fireproof cable 10a, 10b, 10c includes a central conductor 1, a fireproof layer 2 covering the conductor 1, an insulating layer 3 applied to the outside of the fireproof layer 2, a semiconductive tape 4 applied to the outside of the insulating layer 3, A shielding layer 5 applied to the outside of the conductive tape 4, a pressing tape 6 that fixes the shielding layer 5 from the outside, a sheath 7 that covers the pressing tape 6 from the outside and forms the surface layer portion of the high-pressure fireproof cables 10a, 10b, and 10c. It is configured.

導体1は、軟銅素線の円形圧縮より線となっている。
絶縁層3は、架橋ポリエチレンで形成されている。
遮蔽層5は、軟銅テープで形成されている。
シース7は、耐燃性ポリエチレンで形成されている。
The conductor 1 is a stranded wire of an annealed copper strand.
The insulating layer 3 is made of cross-linked polyethylene.
The shielding layer 5 is formed of an annealed copper tape.
The sheath 7 is made of flame resistant polyethylene.

本実施形態の耐火層2は、厚さ0.18mmのガラスマイカテープ(ガラスクロスに集成マイカを貼り付けたもの)21を、らせん状に、かつ、導体1に巻き付け済みの部分の軸方向先端側の半分と、これから巻き付ける部分の軸方向基端側の半分とが重なり合うように巻き付け、更にその外側からもう一枚のガラスマイカテープ21を同様にして巻き付け・・というようにして、計7枚または8枚のガラスマイカテープ21を巻き付けたものとなっている。このような巻き方とすることで、1枚のガラスマイカテープ21が二重になるため、高圧耐火ケーブル10a,10b,10cを軸方向と直交する面で切断した時の耐火層2の断面は、14層または16層のガラスマイカテープ21が積層した状態となる。なお、このように構成された耐火層2の計算上の厚さは2.52mmまたは2.88mmとなるが、製造時に誤差が生じることがあり、14層の場合には2.0〜2.5mmと幅がある。一方、従来の12層の場合は、1.8〜2.2mmである。このことから、本実施形態の耐火層2の厚さは、厚さ0.18mmのガラスマイカテープを7枚以上巻くことによって初めて可能となる2.2mm超ということになる。   The refractory layer 2 of the present embodiment has a glass mica tape 21 (thickened with mica laminated on a glass cloth) 21 having a thickness of 0.18 mm in a spiral shape and the tip in the axial direction of the portion wound around the conductor 1 Wrap so that the half on the side and the half on the axial base end side of the part to be wound overlap, and wind the other glass mica tape 21 from the outside in the same way. Alternatively, eight glass mica tapes 21 are wound. By adopting such a winding method, since one glass mica tape 21 is doubled, the cross section of the refractory layer 2 when the high-pressure refractory cables 10a, 10b, 10c are cut along a plane orthogonal to the axial direction is as follows. The 14-layer or 16-layer glass mica tape 21 is laminated. The calculated thickness of the refractory layer 2 configured as described above is 2.52 mm or 2.88 mm, but an error may occur during manufacture, and in the case of 14 layers, 2.0-2. There is a width of 5 mm. On the other hand, in the case of the conventional 12 layers, it is 1.8-2.2 mm. From this, the thickness of the refractory layer 2 of the present embodiment is over 2.2 mm, which is possible only when seven or more glass mica tapes having a thickness of 0.18 mm are wound.

〔配電ケーブルの耐火性能〕
次に、上記配電ケーブル100の耐火性能について説明する。
説明に際し、本実施形態の配電ケーブル100(マイカテープを7枚(14層)巻いたものおよび8枚(16層)巻いたもの)の耐火性能を、屋内用耐火ケーブルと比較するための耐火試験を行った。なお、屋内用耐火ケーブルには、耐火層のマイカテープが6枚(12層)で、他の構成は本実施形態の配電ケーブル100と同じになっているものを用いた。
[Fireproof performance of power distribution cable]
Next, the fire resistance performance of the power distribution cable 100 will be described.
In the description, the fire resistance test for comparing the fire resistance of the power distribution cable 100 of the present embodiment (7 (14 layers) and 8 (16 layers) of mica tape) with an indoor fire cable. Went. As the indoor fireproof cable, six mica tapes (12 layers) of the fireproof layer were used, and other configurations were the same as those of the power distribution cable 100 of the present embodiment.

耐火試験の具体的手順としては、まず、マイカテープ7枚巻の配電ケーブル100から長さ1.3mのサンプルを切り取り、ラッシングワイヤーおよびメッセンジャーワイヤーを用いて試験装置に支持して、サンプルが実際の配電ケーブルの使用状態と同じになるようにした。そして、サンプルの両端に6.6kV電線路の最高使用電圧(6.9kV)の対地電圧である4kVの電圧を印加しながら、IEC60332−21に準拠した燃焼温度(750℃)、燃焼時間(90分)で、サンプルの中間部を燃焼させた。そして、4kVの電圧印加を一端中断し、導体と遮蔽層との間に500Vの電圧を印加することで、導体と遮蔽層との間の絶縁抵抗を測定した。
その後、サンプルへの電圧の印加を一旦やめ、じょうろを用いて16Lの水を、サンプル中間部の長手方向一端から他端へと約10分間移動させながらかけ続け、サンプルの消火作業を行った。
そして、サンプルに再び燃焼中と同様の電圧を20時間印加し、絶縁抵抗を測定した。
As a specific procedure of the fire resistance test, first, a 1.3 m long sample is cut from the 7-winding distribution cable 100 of mica tape and supported by a testing device using a lashing wire and a messenger wire, and the sample is actually Made it the same as the usage status of the power distribution cable. And while applying the voltage of 4 kV which is the ground voltage of the maximum use voltage (6.9 kV) of a 6.6 kV electric wire to both ends of a sample, the combustion temperature (750 degreeC) based on IEC60332-21, combustion time (90 Minutes), the middle part of the sample was burned. Then, the voltage application of 4 kV was interrupted once, and the insulation resistance between the conductor and the shielding layer was measured by applying a voltage of 500 V between the conductor and the shielding layer.
Thereafter, the voltage application to the sample was temporarily stopped, and 16 L of water was continuously applied for about 10 minutes while moving the sample from one end to the other end in the middle of the sample using a watering can to extinguish the sample.
Then, the same voltage as that during combustion was again applied to the sample for 20 hours, and the insulation resistance was measured.

その後、マイカテープ8枚巻の配電ケーブル100、および6枚巻の屋内用耐火ケーブルからそれぞれサンプルを切り取り、上述したマイカテープ7枚巻の配電ケーブル100のサンプルと同様の耐火試験を行った。   Thereafter, samples were cut out from the 8-winding distribution cable 100 of mica tape and the indoor fireproof cable of 6 sheets, respectively, and the same fire resistance test as the above-described sample of the distribution cable 100 of 7-winding mica tape was performed.

この結果、屋内用耐火ケーブルをサンプルとした耐火試験では、消火後に通電を再開した直後、試験装置が過電流を検出して電流を遮断した。このことは、耐火層が絶縁破壊し、導体と遮蔽層との間が短絡してしまったことを示している。   As a result, in a fire resistance test using an indoor fire resistant cable as a sample, immediately after resuming energization after the fire was extinguished, the test apparatus detected an overcurrent and interrupted the current. This indicates that the refractory layer breaks down and the conductor and the shielding layer are short-circuited.

これに対し、マイカテープ7枚巻の本実施形態の配電ケーブル100をサンプルとした耐火試験では、図2(a)に示すように、3本の耐火ケーブル10(赤相、青相、黄相)全てにおいて、燃焼中は絶縁抵抗の低下がみられるものの、消火後は耐火層2が残って絶縁抵抗が試験前と同程度まで回復し、20時間経過しても導体1と遮蔽層4との間が短絡することはなかった。
このことは、配電ケーブル100が焼損するような沿線火災が発生した場合、他の設備に重大な損傷がない限り、消火直後速やかに列車の運行を再開でき、再開後少なくとも20時間は列車の運行を継続できることを示している。20時間という長さは、一日の営業時間の長さを超えるため、最終列車の通過までは、焼損した配電ケーブル100を用いることができ、新たなケーブルへの交換は夜間の保線作業時に行うことができる。
また、マイカテープ8枚巻の本実施形態の配電ケーブル100をサンプルとした耐火試験でも、図2(b)に示すように、7枚巻の場合と同様の結果が得られた。
On the other hand, in the fire resistance test using the distribution cable 100 of the present embodiment with seven rolls of mica tape as a sample, as shown in FIG. 2A, three fire resistant cables 10 (red phase, blue phase, yellow phase). ) In all cases, although the insulation resistance decreased during combustion, the fire resistance layer 2 remained after the fire was extinguished, and the insulation resistance recovered to the same level as before the test. Even after 20 hours, the conductor 1 and the shielding layer 4 There was no short circuit.
This means that if a fire along the line that causes the power distribution cable 100 to burn out occurs, the train operation can be resumed immediately after the fire is extinguished, as long as there is no serious damage to other equipment. It can be continued. Since the length of 20 hours exceeds the length of the business hours of the day, the burned distribution cable 100 can be used until the final train passes, and replacement with a new cable is performed during maintenance work at night. be able to.
Also, in the fire resistance test using the power distribution cable 100 of the present embodiment with 8 sheets of mica tape as a sample, the same result as in the case of 7 sheets was obtained as shown in FIG.

〔配電ケーブルの使用例〕
次に、上記配電ケーブル100の使用例について説明する。
本実施形態の配電ケーブル100は、上述したような耐火性能を有するため、沿線火災によって焼損しても20時間程度通電を確保することができる。従来は、止む無く、図3に示したように、主として用いる配電ケーブル110と予備として用いる配電ケーブル110の両方を軌道Rの一側方に配設していた箇所においても、少なくとも一方(例えば上側の方)の配電ケーブルを、本実施形態の配電ケーブル100とすることにより、沿線火災によって両方の配電ケーブルが焼損しても、本実施形態の配電ケーブル100は通電を確保するので、消火後は速やかに列車の運行を再開することができる。
[Use example of power distribution cable]
Next, a usage example of the power distribution cable 100 will be described.
Since the distribution cable 100 of the present embodiment has the fire resistance as described above, it is possible to ensure energization for about 20 hours even if the power distribution cable 100 burns out due to a fire along the line. Conventionally, without stopping, as shown in FIG. 3, at least one of the distribution cables 110 used mainly and the distribution cable 110 used as a spare is arranged on one side of the track R (for example, on the upper side). If the distribution cable 100 of this embodiment is used as the distribution cable 100 of this embodiment, even if both of the distribution cables are burned out due to a fire along the line, the distribution cable 100 of this embodiment ensures energization. Train operation can be resumed promptly.

また、従来は、2本の配電ケーブルが両方とも焼損するのを防ぐために一方の配電ケーブルを軌道の一側方に、他方の配電ケーブルを軌道の他方側に配設していた箇所の、少なくとも一方の配電ケーブルを、本実施形態の配電ケーブル100とすることにより、2本の配電ケーブルを纏めて一側方に配設することが可能となる。そうすれば、一度に両方の配電ケーブルのメンテナンスを行うことができるので、メンテナンス作業を容易にすることができる。   In addition, in order to prevent both of the two distribution cables from being burnt, conventionally, at least at the place where one distribution cable is disposed on one side of the track and the other distribution cable is disposed on the other side of the track. By using one power distribution cable as the power distribution cable 100 according to the present embodiment, the two power distribution cables can be collectively disposed on one side. If it does so, since maintenance of both the power distribution cables can be performed at once, the maintenance work can be facilitated.

以上のように、本実施形態の配電ケーブル100は、導体1と、導体1の外側に施す絶縁層3と、絶縁層3の外側に施す遮蔽層4と、を備えたものであって、導体1と絶縁層3との間に、厚さ2.2mm超の耐火層2が施されたものとなっている。   As described above, the power distribution cable 100 of this embodiment includes the conductor 1, the insulating layer 3 applied to the outside of the conductor 1, and the shielding layer 4 applied to the outside of the insulating layer 3, 1 and an insulating layer 3 are provided with a refractory layer 2 having a thickness of more than 2.2 mm.

こうすることで、沿線火災の発生・消火後に通電を再開しても、耐火層2が絶縁破壊せず、導体1と遮蔽層4とが短絡することがないので、焼損前と同様に通電が可能となる。このため、軌道の一方側にのみ複数の配電ケーブルが配設されている箇所において、少なくとも何れかの配電ケーブルを本発明に係る配電ケーブル100とすれば、当該箇所において沿線火災が発生し、全ての配電ケーブルが焼損した後であっても、本実施形態に係る配電ケーブル100によって通電が確保されるので、列車の運行を速やかに再開することができる。
また、沿線火災の消火後から少なくとも20時間は通電を継続することができるので、その日の営業時間は焼損した配電ケーブル100を用いたまま列車の運行を行い、営業時間の終了後に交換作業を行うことができる。従って、列車の運行を中断させることなく復旧を行うことができる。
By doing so, even if the energization is resumed after the occurrence of a fire along the line, the refractory layer 2 does not break down and the conductor 1 and the shielding layer 4 are not short-circuited. It becomes possible. For this reason, if at least one of the distribution cables is used as the distribution cable 100 according to the present invention in a place where a plurality of distribution cables are arranged only on one side of the track, a fire along the line occurs in the place. Even after the power distribution cable is burned out, the power distribution is ensured by the power distribution cable 100 according to the present embodiment, so that the operation of the train can be resumed promptly.
In addition, since the energization can be continued for at least 20 hours after the fire along the line is extinguished, the train is operated with the burned distribution cable 100 during the business hours of the day, and the replacement work is performed after the business hours are over. be able to. Therefore, recovery can be performed without interrupting the train operation.

また、本実施形態の配電ケーブル100の耐火層2は、厚さ0.18mmのマイカテープ21が14層以上積層されたものとなっている。
こうすることで、市販のマイカテープを導体1に巻き付けるだけで容易に耐火層2を形成することができる。
In addition, the fireproof layer 2 of the power distribution cable 100 of the present embodiment is formed by laminating 14 or more layers of mica tape 21 having a thickness of 0.18 mm.
By doing so, the fireproof layer 2 can be easily formed simply by winding a commercially available mica tape around the conductor 1.

以上、本発明を実施形態に基づいて具体的に説明してきたが、本発明は上記実施形態に限定されるものではなく、その要旨を逸脱しない範囲で変更可能である。
例えば、上記実施形態では、コスト等の関係上、ガラスマイカテープを7枚または8枚としたが、コストに関係なく耐火性能を更に高めたい場合には、ガラスマイカテープを9枚以上巻くようにしてもよい。
また、上記実施形態では、1枚のガラスマイカテープを二重になるように巻き付けたが、巻き付け済みの部分の軸方向先端側の3分の2と、これから巻き付ける部分の軸方向基端側の3分の2とが重なり合うように巻き付けることにより、1枚のガラスマイカテープを三重になるよう巻き付けてもよい。
また、上記実施形態では、高圧耐火ケーブルを3本束ねたものを配電ケーブルとしたが、1,2本、或いは4本以上束ねたものとしてもよい。
また、上記実施形態では、導体を軟銅素線の円形圧縮より線としたが、アルミ等の他の金属で形成されたものや、他の断面形状に圧縮されたもの、圧縮されていないもの、或いは単線としてもよい。
また、上記実施形態では、1号線、2号線が共に軌道の一方側に配設された場合に有用であると説明したが、1号線を軌道の一側方、2号線を軌道の他側方に配設する場合であっても、1,2号線の両方、或いは、火災時に焼損する可能性の高い何れか一方を、上記実施形態の配電ケーブルとしてもよい。
As mentioned above, although this invention was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.
For example, in the above embodiment, seven or eight glass mica tapes are used due to cost and the like. However, in order to further improve the fire resistance regardless of the cost, nine or more glass mica tapes are wound. May be.
Moreover, in the said embodiment, although the one glass mica tape was wound so that it might become double, two thirds of the axial direction front end side of the wound part and the axial direction base end side of the part to wind from now on One glass mica tape may be wound in triplicate by winding so that two-thirds overlap.
Moreover, in the said embodiment, although what bundled three high voltage | pressure fireproof cables was used as the power distribution cable, it is good also as what bundled 1, 2, or 4 or more.
Moreover, in the said embodiment, although the conductor was made from the circular compression strand of an annealed copper strand, what was formed with other metals, such as aluminum, what was compressed to other cross-sectional shapes, what was not compressed, Alternatively, it may be a single wire.
Further, in the above embodiment, it has been described that it is useful when both the No. 1 line and No. 2 line are arranged on one side of the track, but the No. 1 line is on one side of the track and the No. 2 line is on the other side of the track. Even if it is a case where it is arrange | positioned, it is good also as a power distribution cable of the said embodiment which is highly likely to burn out at the time of fire both of No. 1 and No. 2.

100 配電ケーブル
10 高圧耐火ケーブル
1 導体
2 耐火層
21 ガラスマイカテープ
5 遮蔽層
100 Distribution Cable 10 High Pressure Fireproof Cable 1 Conductor 2 Fireproof Layer 21 Glass Mica Tape 5 Shielding Layer

Claims (3)

導体と、前記導体の外側に施す絶縁層と、前記絶縁層の外側に施す遮蔽層と、を備えた配電ケーブルであって、
前記導体と前記絶縁層との間に、厚さ2.2mm超の耐火層が施されていることを特徴とする配電ケーブル。
A power distribution cable comprising a conductor, an insulating layer applied to the outside of the conductor, and a shielding layer applied to the outside of the insulating layer,
A power distribution cable, wherein a fire-resistant layer having a thickness of more than 2.2 mm is provided between the conductor and the insulating layer.
前記耐火層は、厚さ0.18mmのマイカテープが14層以上積層されたものであることを特徴とする請求項1に記載の配電ケーブル。   The power distribution cable according to claim 1, wherein the fireproof layer is a laminate of 14 or more layers of mica tape having a thickness of 0.18 mm. 軌道の敷設方向に沿って配設された配電ケーブルと、前記軌道の側方に設けられるとともに、前記配電ケーブルに接続されて電力の供給を受ける信号機と、を備える信号システムであって、
前記配電ケーブルに、請求項1または2に記載の配電ケーブルを用いたことを特徴とする信号システム。
A signal system comprising: a power distribution cable disposed along a track laying direction; and a signal device provided on a side of the track and connected to the power distribution cable to receive power supply,
A signal system using the power distribution cable according to claim 1 or 2 as the power distribution cable.
JP2014020330A 2014-02-05 2014-02-05 power distribution cable and signal system Pending JP2015149145A (en)

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CN106057344A (en) * 2016-07-28 2016-10-26 江苏长峰电缆有限公司 Impact-resistant spray-resistant, halogen-free, low-smoke flame-retardant medium voltage fire-resistant cable
WO2023024596A1 (en) * 2021-08-24 2023-03-02 江苏亨通线缆科技有限公司 Flame-retardant fire-resistant power cable resistant to spray and vibration

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JPS57135633A (en) * 1981-02-14 1982-08-21 Eiraku Denki Kk Method and device for monitoring load power source utilizing high voltage distribution wire
JPS6138713U (en) * 1984-08-11 1986-03-11 昭和電線電纜株式会社 fireproof wire
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CN106057344A (en) * 2016-07-28 2016-10-26 江苏长峰电缆有限公司 Impact-resistant spray-resistant, halogen-free, low-smoke flame-retardant medium voltage fire-resistant cable
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