JPH05166418A - Power cable - Google Patents
Power cableInfo
- Publication number
- JPH05166418A JPH05166418A JP3328774A JP32877491A JPH05166418A JP H05166418 A JPH05166418 A JP H05166418A JP 3328774 A JP3328774 A JP 3328774A JP 32877491 A JP32877491 A JP 32877491A JP H05166418 A JPH05166418 A JP H05166418A
- Authority
- JP
- Japan
- Prior art keywords
- thick
- amorphours
- polyolefine
- power cable
- water
- 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- Withdrawn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
- 229920000098 polyolefin Polymers 0.000 claims abstract description 19
- 239000012212 insulator Substances 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract description 13
- 239000004703 cross-linked polyethylene Substances 0.000 abstract description 13
- 240000005572 Syzygium cordatum Species 0.000 abstract description 10
- 235000006650 Syzygium cordatum Nutrition 0.000 abstract description 10
- 238000001125 extrusion Methods 0.000 abstract description 4
- 239000011810 insulating material Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- 239000004800 polyvinyl chloride Substances 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐水トリー性および絶
縁強度を向上させた電力ケ―ブルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cable having improved water resistance and insulation strength.
【０００２】[0002]
【従来の技術】従来から、電力ケ―ブルの絶縁体材料に
は、架橋ポリエチレンが、絶縁抵抗および絶縁耐力が高
くかつ安定であるうえ、耐水耐湿性、耐薬品性、耐溶剤
性などにも優れていることから、汎用されている。2. Description of the Related Art Conventionally, crosslinked polyethylene has been used as an insulating material for electric power cables because it has high insulation resistance and dielectric strength and is stable, as well as water resistance, moisture resistance, chemical resistance and solvent resistance. It is widely used because it is excellent.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな架橋ポリエチレンからなる絶縁体は耐水トリー性に
乏しく、浸水下で長期間課電されると水トリーを生じ、
ついには絶縁破壊に至るおそれがあった。However, such an insulator made of cross-linked polyethylene is poor in water tree resistance, and when an electric current is applied for a long time under flooding, a water tree is generated.
Finally, there was a risk of dielectric breakdown.
【０００４】また、近年、電力ケーブルの高圧化、大容
量化が進められており、このような要求に対し、添加剤
を配合したり、製造工程や押出工程時における異物管理
を行うなどして、架橋ポリエチレンの特性の向上、安定
化を図り、対応してきているが、このような対応には限
度があった。Further, in recent years, the high pressure and large capacity of electric power cables have been promoted, and in response to such requirements, additives are blended and foreign substances are controlled in the manufacturing process and the extrusion process. We have been working to improve and stabilize the properties of cross-linked polyethylene, but such measures have been limited.
【０００５】このため、架橋ポリエチレンに代わる、電
力ケーブルの高圧化、大容量化を可能とする新規な絶縁
材料を用いた電力ケーブルの開発が望まれている。Therefore, it has been desired to develop a power cable using a novel insulating material, which can replace the cross-linked polyethylene and increase the voltage and capacity of the power cable.
【０００６】本発明はこのような要求に応えるべくなさ
れたもので、耐水トリー性に優れ、かつ他の特性につい
ては架橋ポリエチレン絶縁ケーブルと同等かそれ以上の
特性を有する、高圧化、大容量化に適した電力ケ―ブル
を提供することを目的とする。The present invention has been made in order to meet such a requirement, and is excellent in water tree resistance and has other characteristics similar to or higher than those of a cross-linked polyethylene insulated cable, high pressure and large capacity. The purpose is to provide a power cable suitable for.
【０００７】[0007]
【課題を解決するための手段】本発明の電力ケ―ブル
は、導体外周に、アモルファスポリオレフィンからなる
絶縁体を設けてなることを特徴としている。The power cable of the present invention is characterized in that an insulator made of amorphous polyolefin is provided on the outer periphery of the conductor.
【０００８】本発明に使用されるアモルファスポリオレ
フィンは、下記のような構造単位を有する分子量が 2〜
3 万程度の非晶質の熱可塑性ポリマーである。下記式中
Ｒ1 〜Ｒ4 は水素原子または炭素数 1〜7 のアルキル基
であり、好ましくはＲ1 〜Ｒ4 の合計炭素数が少なくと
も 2以上のものが適している。このようなものとして
は、たとえばZEONEX 280（日本ゼオン社製 商品名）な
どがある。The amorphous polyolefin used in the present invention has a molecular weight of from 2 to 5 having the following structural units.
It is an amorphous thermoplastic polymer of about 30,000. In the following formula, R 1 to R 4 are hydrogen atoms or alkyl groups having 1 to 7 carbon atoms, and those having a total carbon number of R 1 to R 4 of at least 2 or more are suitable. Examples of such materials include ZEONEX 280 (trade name of Nippon Zeon Co., Ltd.).
【０００９】[0009]
【化１】 このアモルファスポリオレフィンは、耐水トリー性に優
れているが、これは非晶質であることに起因すると考え
られる。また、このアモルファスポリオレフィンは絶縁
特性や誘電特性は架橋ポリエチレンと同等かそれ以上
で、特に絶縁破壊強さは架橋ポリエチレンのほぼ 2倍あ
り、ケーブルの高圧化、大容量化を可能とするものであ
る。[Chemical 1] This amorphous polyolefin is excellent in water tree resistance, but it is considered that this is because it is amorphous. In addition, this amorphous polyolefin has insulation properties and dielectric properties that are equal to or higher than those of cross-linked polyethylene, and its dielectric breakdown strength is almost twice that of cross-linked polyethylene, enabling high voltage and high capacity cables. ..
【００１０】本発明においては、耐熱性を高めるため、
上記アモルファスポリオレフィンを架橋させてもよく、
架橋方法としては、有機過酸化物による化学架橋方法、
電子線照射による架橋方法、シラン架橋方法など、架橋
ポリエチレンを得る場合と同様の方法を用いることがで
きる。In the present invention, in order to improve heat resistance,
The amorphous polyolefin may be crosslinked,
As the crosslinking method, a chemical crosslinking method using an organic peroxide,
The same methods as those for obtaining crosslinked polyethylene can be used, such as a crosslinking method by electron beam irradiation and a silane crosslinking method.
【００１１】また、アモルファスポリオレフィンやその
架橋体には、老化防止剤や架橋促進剤を配合してもよ
い。An antioxidant and a crosslinking accelerator may be added to the amorphous polyolefin or its crosslinked product.
【００１２】本発明の電力ケーブルを得るには、上記ア
モルファスポリオレフィンと、必要に応じて配合される
架橋剤や架橋促進剤、さらに老化防止剤などを混合しも
のを、導体上に押出被覆すればよい。To obtain the power cable of the present invention, a mixture of the above-mentioned amorphous polyolefin, a cross-linking agent, a cross-linking accelerator, and an antioxidant, which are blended as necessary, is extrusion-coated on the conductor. Good.
【００１３】本発明の電力ケーブルには、必要ならば、
絶縁体の内外にそれぞれ内部半導電層、外部半導電層を
設けるようにしてもよい。内部半導電層、外部半導電層
用材料としては、エチレンとエチレン−α−オレフィン
共重合体などのポリオレフィンとの混合樹脂に導電性カ
―ボンを配合したものなど公知のものを使用することが
でき、アモルファスポリオレフィンとともに、たとえば
3層同時押出しにより被覆することができる。The power cable of the present invention may, if desired,
An inner semiconductive layer and an outer semiconductive layer may be provided inside and outside the insulator, respectively. As the material for the inner semi-conductive layer and the outer semi-conductive layer, known materials such as a mixture of conductive carbon with a mixed resin of ethylene and a polyolefin such as an ethylene-α-olefin copolymer may be used. Yes, with amorphous polyolefin, for example
It can be coated by three-layer coextrusion.
【００１４】[0014]
【作用】本発明の電力ケ―ブルでは、絶縁体をアモルフ
ァスポリオレフィンで構成したことにより、従来の架橋
ポリエチレン絶縁ケ―ブルと比較して、耐水トリー性に
優れ、かつほぼ 2倍に近い優れた絶縁破壊強さを有して
いる。また、他の電気特性についてもほぼ同等の特性を
有することから、ケーブルの高圧化、大容量化を図るこ
とができる。In the power cable of the present invention, since the insulator is made of amorphous polyolefin, it has excellent water tree resistance and is almost doubled as compared with the conventional crosslinked polyethylene insulation cable. Has dielectric breakdown strength. Further, since the other electrical characteristics are almost the same, it is possible to increase the voltage and capacity of the cable.
【００１５】[0015]
【実施例】次に本発明の実施例を記載する。EXAMPLES Examples of the present invention will be described below.
【００１６】図１に示すように、外径19mmφの銅導体
（断面積 250mm2 ）１上に、下記に示すような半導電性
組成物およびアモルファスポリオレフィンのZEONEX280
を用いて、 3層同時押出により、内部半導電層（ 1mm
厚）２、アモルファスポリオレフィン絶縁体（ 2mm厚）
３、外部半導電層（ 1mm厚）４を順に設け、さらにその
上に、軟質塩化ビニル樹脂を押出して外被（ 2mm厚）５
を形成して電力ケーブルを製造した。As shown in FIG. 1, on a copper conductor (cross-sectional area 250 mm 2 ) 1 having an outer diameter of 19 mmφ, a semiconductive composition as shown below and an amorphous polyolefin ZONE EX280.
Using an internal semiconductive layer (1 mm
Thickness) 2, amorphous polyolefin insulation (2mm thickness)
3, an outer semiconductive layer (1 mm thick) 4 is provided in this order, and a soft vinyl chloride resin is extruded on top of this, and a jacket (2 mm thick) 5
To form a power cable.
【００１７】 半導電性組成物：ポリエチレン … 20重量部 エチレン・プロピレン共重合体 … 41重量部 導電性カ―ボン …38.5重量部 老化防止剤 … 0.5重量部 得られた電力ケーブルの電気特性および耐水トリー性を
調べ、絶縁体を従来の架橋ポリエチレンで形成した以外
は実施例と同じ条件で製造した電力ケーブル（比較例
１）、およびその場合の架橋ポリエチレン絶縁体の厚さ
を変えて製造した電力ケーブル（比較例２）と比較した
ところ、実施例のケーブルは従来の比較例１のケーブル
に比べて同等乃至それ以上の電気特性を有しており、特
に絶縁破壊強さについては 2倍に近い測定結果が得られ
た。また、耐水トリー性も大幅に向上していた。Semi-conductive composition: polyethylene 20 parts by weight Ethylene / propylene copolymer 41 parts by weight Conductive carbon 38.5 parts by weight Anti-aging agent 0.5 parts by weight Electrical properties and water resistance of the obtained power cable The tree property was examined, and a power cable manufactured under the same conditions as in the example except that the insulator was formed of conventional crosslinked polyethylene (Comparative Example 1), and power produced by changing the thickness of the crosslinked polyethylene insulator in that case. When compared with the cable (Comparative Example 2), the cable of the example has electrical characteristics equal to or higher than those of the cable of the conventional comparative example 1, and particularly, the dielectric breakdown strength is nearly doubled. The measurement result was obtained. Also, the water resistance of the tree was significantly improved.
【００１８】これらの測定結果のうち、交流破壊電圧お
よび耐水トリー性の結果を表１に示す。なお、交流破壊
電圧は、 UPTに基づき、97kV/10min分、105kV/10min
後、 5kV/10minの条件で測定した。また、耐水トリー性
は、各試料ケーブル（長さ20ｍ）を70℃の温水中に浸漬
し、1KHz、38KVの電圧を60日間印加した後の水トリーの
発生数を、比較例２の場合を 100として示した。Among these measurement results, the results of AC breakdown voltage and water tree resistance are shown in Table 1. The AC breakdown voltage is 97kV / 10min, 105kV / 10min based on UPT.
After that, it was measured under the condition of 5 kV / 10 min. As for the water resistance, the number of water trees generated after immersing each sample cable (length 20 m) in hot water at 70 ° C and applying a voltage of 1 KHz, 38 KV for 60 days was compared with that of Comparative Example 2. Shown as 100.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】以上の実施例からも明らかなように本発
明の電力ケ―ブルによれば、絶縁体材料としてアモルフ
ァスポリオレフィンを用いたことにより、従来の架橋ポ
リエチレン絶縁ケーブルに比べて、耐水トリー性が大幅
に改善される。また、電気特性は同等かそれ以上で、特
に絶縁破壊強さは大きく向上するので、電力ケ―ブルの
高圧化、大容量化を図ることができる。As is apparent from the above embodiments, according to the power cable of the present invention, the use of amorphous polyolefin as the insulating material makes it possible to obtain a water resistant tree as compared with the conventional crosslinked polyethylene insulated cable. Sex is greatly improved. In addition, since the electric characteristics are the same or higher and the dielectric breakdown strength is greatly improved, it is possible to increase the voltage and capacity of the power cable.
【図１】面は本発明の一実施例の電力ケ―ブルを示す横
断面図である。FIG. 1 is a cross-sectional view showing a power cable according to an embodiment of the present invention.
１………導体 ２………内部半導電層 ３………アモルファスポリオレフィン ４………外部半導電層 ５………塩化ビニル樹脂外被 1 ... Conductor 2 ... Internal semiconductive layer 3 ... Amorphous polyolefin 4 ... External semiconductive layer 5 ... Vinyl chloride resin jacket
Claims (1)
ンからなる絶縁体を設けてなることを特徴とする電力ケ
ーブル。1. A power cable, characterized in that an insulator made of amorphous polyolefin is provided on the outer periphery of a conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3328774A JPH05166418A (en) | 1991-12-12 | 1991-12-12 | Power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3328774A JPH05166418A (en) | 1991-12-12 | 1991-12-12 | Power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05166418A true JPH05166418A (en) | 1993-07-02 |
Family
ID=18213987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3328774A Withdrawn JPH05166418A (en) | 1991-12-12 | 1991-12-12 | Power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05166418A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11205525B2 (en) * | 2017-11-07 | 2021-12-21 | Hitachi Metals, Ltd. | Insulated wire |
-
1991
- 1991-12-12 JP JP3328774A patent/JPH05166418A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11205525B2 (en) * | 2017-11-07 | 2021-12-21 | Hitachi Metals, Ltd. | Insulated wire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990311 |