JPH0322309A - Power cable - Google Patents
Power cableInfo
- Publication number
- JPH0322309A JPH0322309A JP15608889A JP15608889A JPH0322309A JP H0322309 A JPH0322309 A JP H0322309A JP 15608889 A JP15608889 A JP 15608889A JP 15608889 A JP15608889 A JP 15608889A JP H0322309 A JPH0322309 A JP H0322309A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- polyethylene
- insulating layer
- vinyl acetate
- cross
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 10
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 239000004698 Polyethylene Substances 0.000 claims abstract description 7
- -1 polyethylene Polymers 0.000 claims abstract description 7
- 229920000573 polyethylene Polymers 0.000 claims abstract description 7
- 238000004132 cross linking Methods 0.000 claims abstract description 6
- 239000003054 catalyst Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 4
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 4
- 150000002736 metal compounds Chemical class 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical group CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000010559 graft polymerization reaction Methods 0.000 abstract description 3
- 240000005572 Syzygium cordatum Species 0.000 abstract description 2
- 235000006650 Syzygium cordatum Nutrition 0.000 abstract description 2
- 238000007334 copolymerization reaction Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract description 2
- 230000001629 suppression Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 description 6
- 239000004703 cross-linked polyethylene Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000004718 silane crosslinked polyethylene Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
- 241001147388 Uncia Species 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 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
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Chemical group 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Insulated Conductors (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は地中送配電用として用いられる例えば架橋ポリ
エチレン絶縁電力ケーブル等の固体絶縁電力ケーブルに
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to solid insulated power cables, such as cross-linked polyethylene insulated power cables, used for underground power transmission and distribution.
（発明の背景）
固体絶縁の電力ケーブル、特に架橋ポリエチレン絶縁電
力ケーブルは、布設工事、メンテナンスの容易性等によ
り従来のＯＦケーブルに代って送配電用ケーブルとして
広い範囲に使用されるようになってきている。(Background of the Invention) Solid insulated power cables, especially cross-linked polyethylene insulated power cables, have come to be widely used as power transmission and distribution cables in place of conventional OF cables due to ease of installation and maintenance. It's coming.
一方、固体絶縁電力ケーブルは、水の存在する雰囲気で
使用すると、いわゆる水トリーと呼ばれる劣化現象を示
し、ついには絶縁破壊に至ることが知られている。On the other hand, it is known that solid insulated power cables exhibit a deterioration phenomenon called water treeing when used in an atmosphere where water is present, eventually leading to dielectric breakdown.
この劣化現象を防止するため、様々な方法が提案されて
いる。Various methods have been proposed to prevent this deterioration phenomenon.
ごく一例を挙げると、特開昭５１−１７５８８号公報に
は、ポリオレフィンにエチレン−酢酸ビニル共重合体を
添加した組成物をケーブル絶縁体として使用することが
提案されている。又特開昭５４−８０３４８号公報には
、架橋ポリエチレン組成物に、炭素数２４以下で、炭素
一炭素２重結合を有するカルボン酸金属塩を０．０！〜
５重量部添加する方法が提案されている。To give just one example, JP-A-51-17588 proposes the use of a composition in which an ethylene-vinyl acetate copolymer is added to a polyolefin as a cable insulator. Furthermore, JP-A-54-80348 discloses that a carboxylic acid metal salt having 24 or less carbon atoms and a carbon-carbon double bond is added to a crosslinked polyethylene composition at 0.0! ~
A method of adding 5 parts by weight has been proposed.
しかし、未だに決定的な方法は得られていない．本発明
は新たに非常に効果的に水トリーを抑制した電力ケーブ
ルを提供するものである。However, no definitive method has been found yet. The present invention provides a new power cable that suppresses water trees very effectively.
（発明の内容）
本発明は、酢酸ビニル含有量が２５〜３３重量％のエチ
レン−酢酸ビニル共重合樹脂２５〜３５重量％とポリエ
チレン６５〜７５重量％の混合物で、分子鎖中にビニル
トリメトキシシランを共重合ないしグラフト重合の手法
により含有し、かつ架橋触媒として有機重金属化合物を
含む組成物をケーブル絶縁層として用いることで、シラ
ン架橋ポリエチレン単独、あるいは一般のポリエチレン
に同様のエチレン−酢酸ビニル共重合樹脂を混合した組
成物をケーブル絶縁層に用いた場合に比して、飛躍的な
長期浸水課電寿命が得られることを発見した。(Contents of the invention) The present invention is a mixture of 25 to 35% by weight of an ethylene-vinyl acetate copolymer resin with a vinyl acetate content of 25 to 33% by weight and 65 to 75% by weight of polyethylene. By using a composition containing silane by copolymerization or graft polymerization and an organic heavy metal compound as a crosslinking catalyst as a cable insulation layer, silane crosslinked polyethylene alone or ethylene-vinyl acetate similar to general polyethylene can be used. It has been discovered that a significantly longer submerged electrification life can be obtained than when a composition containing a polymeric resin is used for the cable insulation layer.
上記において、シラン架橋ポリエチレンは酸化防止剤を
含んでいることが長期使用時の機械特性の面から望まし
く、その他のスリップ剤を含んでいてもよい。又これら
は、着色のためにカーボンブラック等の顔料を含んでい
てもよい。In the above, it is desirable that the silane-crosslinked polyethylene contains an antioxidant from the viewpoint of mechanical properties during long-term use, and may contain other slip agents. These may also contain pigments such as carbon black for coloring.
（実施例）
ポリエチレン、シラン架橋ポリエチレン、エチレン−酢
酸ビニル共重合樹脂（略称ＥＶ＾樹脂）、酸化防止剤（
４ ，４’−チオビスー（６−ｔ−ブチル３−メチルフ
ェノール））、有機過酸化物（ジクミルバーオキサイド
）を各々第ｌ表の配合に従ってバンバリーミキサーにて
混合し、ペレット化した。(Example) Polyethylene, silane crosslinked polyethylene, ethylene-vinyl acetate copolymer resin (abbreviated as EV^ resin), antioxidant (
4,4'-Thiobis(6-t-butyl 3-methylphenol)) and an organic peroxide (dicumyl peroxide) were mixed in a Banbury mixer according to the formulations shown in Table 1 and pelletized.
公称断面積３８一〇銅撚線導体上にｌ ｍｍ厚の内部半
導電層（日本ユニカ製、ＮＬＩＣｌ９５Ｂ＋）、３ ｍ
ｍ厚の絶＆ｔ層（第１表に掲げる１４種類の組成物）、
ｌ ｍｍ厚の外部半導電層（日本ユニカ製、ＮＵＣＶ−
９５［ｉ＋）を順次押し出し被覆した。Nominal cross-sectional area 3810 l mm thick internal semiconducting layer (manufactured by Nippon Unica, NLIC195B+) on copper stranded conductor, 3 m
m-thick x&t layer (14 types of compositions listed in Table 1),
l mm thick outer semiconducting layer (manufactured by Nippon Unica, NUCV-
95[i+) were sequentially extrusion coated.
その後、比較例１、比較例２は窒素ガス中で赤外線ヒー
タにより加熱架橋し、その他の８種類については、６０
℃温水中に１００時間浸漬することで架橋を生ぜしめ、
サンプルケーブルを作成した。Thereafter, Comparative Examples 1 and 2 were cross-linked by heating in nitrogen gas using an infrared heater, and the other eight types were
Crosslinking is caused by immersion in warm water at ℃ for 100 hours,
I created a sample cable.
これら１４框類のケーブルを６０℃温水中にてＡＣＢＯ
Ｈｚ， ３０ｋＹの電圧を印加し、絶縁破壊が生ずるま
での時間を測定した。比較例１の破壊時間を１．０とし
、相対値にて第１表に示した。ACBO the cables of these 14 frames in 60℃ warm water.
A voltage of 30 kY at Hz was applied, and the time until dielectric breakdown occurred was measured. The failure time of Comparative Example 1 was set as 1.0, and the relative values are shown in Table 1.
比較例１〜４及び実施例１．２の結果から、本発明の電
力ケーブルは通常の架橋ポリエチレン、ＥＹＡ樹脂をブ
レンドした架橋ポリエチレン、あるいはシラン架橋ポリ
エチレンを絶縁層としたケーブルに比し、より長い浸水
課電寿命を有していることがわかる。From the results of Comparative Examples 1 to 4 and Example 1.2, the power cable of the present invention is longer than the cable whose insulating layer is made of ordinary cross-linked polyethylene, cross-linked polyethylene blended with EYA resin, or silane cross-linked polyethylene. It can be seen that it has a submerged electrification life.
しかも、この結果で得られている寿命は、ＥＶＡ樹脂を
ブレンドした架橋ポリエチレン、及びシラン架橋ポリエ
チレン単独の結果を掛け合せることで予想される寿命よ
り明らかに長く、予期せざる効果が生じているものとい
える。Moreover, the life obtained from these results is clearly longer than the life expected by combining the results of cross-linked polyethylene blended with EVA resin and silane cross-linked polyethylene alone, indicating an unexpected effect. It can be said.
このとき、比較例３及び４と、実施例１及び２の結果か
ら、使用するシラン架橋ポリエチレンは、エチレンとビ
ニルトリメトキシシランを共重合して得られたものでも
、ポリエチレンにビニルトリメトキシシランをジクミル
パーオキサイドを触媒としてグラフト重合の形で付加さ
せて得たものでも、いずれも同様の効果を有することが
わかる。At this time, from the results of Comparative Examples 3 and 4 and Examples 1 and 2, the silane-crosslinked polyethylene used may be one obtained by copolymerizing ethylene and vinyltrimethoxysilane, or one obtained by copolymerizing polyethylene with vinyltrimethoxysilane. It can be seen that even those obtained by adding dicumyl peroxide as a catalyst in the form of graft polymerization have similar effects.
又実施例１ ．３ ．４及び比較例５．６の結果から、
ブレンドに用いるＥＶＡ樹脂が、酢酸ビニル含有量が２
５重量％〜３３重量％のものである場合に、特に顕著な
効果を奏することがわかる。Also, Example 1. 3. From the results of 4 and Comparative Example 5.6,
The EVA resin used in the blend has a vinyl acetate content of 2
It can be seen that a particularly remarkable effect is achieved when the content is 5% to 33% by weight.
さらに、実施例１ ．５ ．８及び比較例７．８の結果
から、ＥＶＡ樹脂の配合割合は、２５重量％〜３５重量
％がよいことがわかる。即ち、２５重量％未満、あるい
は３５重量％を超える場合は、浸水課電効果を延ばす効
果が小さくなるからである。Furthermore, Example 1. 5. From the results of Comparative Example 8 and Comparative Example 7.8, it can be seen that the blending ratio of EVA resin is preferably 25% by weight to 35% by weight. That is, if it is less than 25% by weight or more than 35% by weight, the effect of prolonging the flood electrification effect will be reduced.
（発明の効果）
以上説明したように、本発明の電力ケーブルによれば、
浸水状態で課電された場合の寿命、即ち絶縁破壊に至る
までの時間が著しく長くなる。従って、周囲に水分のあ
る環境下で使用される場合の多い地中送配電用電力ケー
ブルとして用いるとき、極めて効果的である。(Effect of the invention) As explained above, according to the power cable of the present invention,
When electricity is applied in a flooded state, the life span, that is, the time until dielectric breakdown occurs, becomes significantly longer. Therefore, it is extremely effective when used as a power cable for underground power transmission and distribution, which is often used in environments with surrounding moisture.
Claims (1)
−酢酸ビニル共重合樹脂２５〜３５重量％とポリエチレ
ン６５〜７５重量％の混合物で、分子鎖中にビニルトリ
メトキシシランを共重合ないしグラフト重合の手法によ
り含有し、かつ架橋触媒として有機重金属化合物を含む
組成物を主体とした絶縁層を具え、上記絶縁層が水分の
存在下でトリメトキシシラン基同士が橋かけ反応するこ
とで架橋が施されていることを特徴とする電力ケーブル
。(1) A mixture of 25-35% by weight of ethylene-vinyl acetate copolymer resin with a vinyl acetate content of 25-33% by weight and 65-75% by weight of polyethylene, with vinyltrimethoxysilane copolymerized or grafted into the molecular chain. The insulating layer has an insulating layer mainly composed of a composition containing an organic heavy metal compound as a crosslinking catalyst by a polymerization method, and the insulating layer is crosslinked by a crosslinking reaction between trimethoxysilane groups in the presence of moisture. A power cable characterized by:
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1156088A JP2675144B2 (en) | 1989-06-19 | 1989-06-19 | Power cable |
| DK90124479T DK0491066T3 (en) | 1989-06-19 | 1990-12-17 | Power cable |
| DE1990625947 DE69025947T2 (en) | 1989-06-19 | 1990-12-17 | Power cord |
| EP19900124479 EP0491066B1 (en) | 1989-06-19 | 1990-12-17 | Power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1156088A JP2675144B2 (en) | 1989-06-19 | 1989-06-19 | Power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0322309A true JPH0322309A (en) | 1991-01-30 |
| JP2675144B2 JP2675144B2 (en) | 1997-11-12 |
Family
ID=15620043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1156088A Expired - Lifetime JP2675144B2 (en) | 1989-06-19 | 1989-06-19 | Power cable |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0491066B1 (en) |
| JP (1) | JP2675144B2 (en) |
| DE (1) | DE69025947T2 (en) |
| DK (1) | DK0491066T3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0547277A1 (en) * | 1991-12-16 | 1993-06-23 | BP Chemicals Limited | Process for producing stabilized silane copolymers |
| US5492760A (en) * | 1994-12-05 | 1996-02-20 | At Plastics Inc. | Water tree resistant, moisture curable insulation composition for power cables |
| WO2008090641A1 (en) * | 2007-01-23 | 2008-07-31 | Sumitomo Wiring Systems, Ltd. | Resin composition, covered electric wire, and method for production of covered electric wire |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2935224A1 (en) * | 1979-08-31 | 1981-03-19 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | WATERPROOF HIGH VOLTAGE INSULATION FOR ELECTRIC CABLES |
| US4514539A (en) * | 1983-05-05 | 1985-04-30 | Reichhold Chemicals, Inc. | Stain resistant polymeric insulating compositions |
| DE3633056A1 (en) * | 1986-09-29 | 1988-04-07 | Kabelmetal Electro Gmbh | Extrudable mixture for halogen-free, highly flame-resistant coverings (sheaths) |
-
1989
- 1989-06-19 JP JP1156088A patent/JP2675144B2/en not_active Expired - Lifetime
-
1990
- 1990-12-17 EP EP19900124479 patent/EP0491066B1/en not_active Expired - Lifetime
- 1990-12-17 DK DK90124479T patent/DK0491066T3/en active
- 1990-12-17 DE DE1990625947 patent/DE69025947T2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0547277A1 (en) * | 1991-12-16 | 1993-06-23 | BP Chemicals Limited | Process for producing stabilized silane copolymers |
| US5492760A (en) * | 1994-12-05 | 1996-02-20 | At Plastics Inc. | Water tree resistant, moisture curable insulation composition for power cables |
| WO2008090641A1 (en) * | 2007-01-23 | 2008-07-31 | Sumitomo Wiring Systems, Ltd. | Resin composition, covered electric wire, and method for production of covered electric wire |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69025947T2 (en) | 1996-07-25 |
| EP0491066A1 (en) | 1992-06-24 |
| EP0491066B1 (en) | 1996-03-13 |
| DE69025947D1 (en) | 1996-04-18 |
| DK0491066T3 (en) | 1996-07-22 |
| JP2675144B2 (en) | 1997-11-12 |
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