JPS59103209A - Electrically insulating cable - Google Patents
Electrically insulating cableInfo
- Publication number
- JPS59103209A JPS59103209A JP57213064A JP21306482A JPS59103209A JP S59103209 A JPS59103209 A JP S59103209A JP 57213064 A JP57213064 A JP 57213064A JP 21306482 A JP21306482 A JP 21306482A JP S59103209 A JPS59103209 A JP S59103209A
- Authority
- JP
- Japan
- Prior art keywords
- ethylene
- cable
- propylene
- electrically insulating
- copolymer
- 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.)
- Pending
Links
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 description 7
- -1 polyethylene Polymers 0.000 description 7
- 235000006650 Syzygium cordatum Nutrition 0.000 description 5
- 240000005572 Syzygium cordatum Species 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000012212 insulator Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000007787 solid 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
- Insulated Conductors (AREA)
- Organic Insulating Materials (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、水トリーの発生の少ない、従って、課電時の
破壊電圧の低下の少ない電気絶縁ケーブルに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electrically insulated cable in which water trees are less likely to occur and, therefore, breakdown voltage is less reduced when energized.
固体絶縁ケーブルの絶縁体には、一般に、ポリエチレン
、架橋ポリエチレン等のポリオレフィン材料が使われて
いる。ところが、これらの材料は、課電中、主に水トリ
ーの発生成長による劣化を起し、その破壊電圧の低下を
まねくため、現在は、その低下分の余裕を見て、絶縁厚
を厚くして作られている。その為、布設用の管路が大き
くなるなど不利な点が多く、それ故、水トリーによる劣
化を抑制することが望まれていた。Polyolefin materials such as polyethylene, cross-linked polyethylene, etc. are generally used for the insulation of solid insulated cables. However, these materials deteriorate during energization, mainly due to the generation and growth of water trees, leading to a drop in their breakdown voltage. It is made with For this reason, there are many disadvantages such as the need for a large pipeline for installation, and therefore, it has been desired to suppress deterioration due to water trees.
発明者らは、上記の点に鑑みて、誘電特性に優れた材料
であるポリエチレンの他、ポリプロピレン、エチレンプ
ロピレン共重合体を用いてケーブルを作り、水中での課
電試験を行ない、その結果エチレン−プロピレン共重合
体のうちブロック共重合体が、特に水中長期課電特性に
優れていることを見出して、本発明を為すに致った。In view of the above points, the inventors made a cable using polyethylene, which is a material with excellent dielectric properties, as well as polypropylene and ethylene propylene copolymer, and conducted an underwater electrification test. - We have discovered that among propylene copolymers, block copolymers are particularly excellent in long-term electrification characteristics in water, leading to the present invention.
本発明は、絶縁体としてエチレンープロピレンブロック
共重合体を用いたことを特徴とする電気絶縁ケーブルを
提供するものであって、好ましくは、エチレン−プロピ
レン共重合体のエチレン量が１〜１０％のものを用いた
電気絶縁ケーブルにある。The present invention provides an electrically insulated cable characterized in that an ethylene-propylene block copolymer is used as an insulator, and preferably the ethylene content of the ethylene-propylene copolymer is 1 to 10%. This is an electrically insulated cable using
本発明ニおいて、エチレンープロピレンブロソク共重合
体をケーブル絶縁体として用いた理由は、後述する実験
例の結果から明らかなように、架橋ポリエチレン、エチ
レン−プロピレンランダム共重合体、ポリプロピレンに
比べ、水中課電をした場合の破壊時間が優れており、そ
の分給縁厚の低減が可能となるからである。上記現象が
どの様な理由に基づくものであるかは、まだ明らかでは
ないが、本発明におけるエチレンープロピレンブロソク
共重合体のエチレン量が１〜１０％であるとき、特に本
発明の効果即ち水トリーの発生が抑制され、長期課電特
性に優れて、より好ましい。In the present invention, the reason why the ethylene-propylene bromide copolymer was used as the cable insulator is that it is compared with cross-linked polyethylene, ethylene-propylene random copolymer, and polypropylene, as is clear from the results of the experimental examples described later. This is because the breakdown time is excellent when electricity is applied underwater, and the thickness of the feeding edge can be reduced accordingly. It is not yet clear what the reason for the above phenomenon is based on, but when the ethylene content of the ethylene-propylene broth copolymer of the present invention is 1 to 10%, the effects of the present invention, i.e., It is more preferable because it suppresses the occurrence of water trees and has excellent long-term charging characteristics.
実施例
６ｋＶクラスの絶ｉ諌体を有する第１表に示す構造のケ
ーブルを製造した。絶縁体として用いた材料は、第１表
に示す通りであるが、更に詳細には第２表に示す通りで
ある。Example 6 A cable having the structure shown in Table 1 and having an insulating body of kV class was manufactured. The materials used as the insulators are shown in Table 1, and in more detail in Table 2.
第 １ 表
上記各ケ′−プルを６０°Ｃ水中に浸漬しながら、６．
７ｋＶ／ｍｍ （平均電界）を印加し、４００時間、８
００時間課電後における水トリーの発生数を調べた。又
、破壊時間を求め、従来の架橋ポリエチレンケーブル（
比較例３）の破壊時間に対するそれぞれの破壊時間の比
を求めた。Table 1 While immersing each of the above cables in 60°C water, 6.
7 kV/mm (average electric field) was applied for 400 hours, 8
The number of water trees generated after 00 hours of electricity application was investigated. In addition, we determined the failure time of the conventional cross-linked polyethylene cable (
The ratio of each fracture time to the fracture time of Comparative Example 3) was determined.
第２表に上記試験結果を示す。Table 2 shows the above test results.
第２表に示す試験結果から明らかな様に、絶縁体として
エチレンープロピレンブロソク共重合体を用いたケーブ
ル（実施例１及び２）のトリー発生数は、ポリエチレン
絶縁ケーブル（比較例２及び８）、及びポリプロピレン
絶縁ケーブル（比較例４）に比べ、著しく少なく、従っ
て、破壊時間も長く、水中長期寿命の特性に優れている
ことが分かる。また、同じエチレン−プロピレン共重合
体を絶縁体として用いたものであっても、ランダム共重
合体の場合（比較例１）は、従来のポリエチレン絶縁ケ
ーブル（比較例３）に比べ、トリー発生数が多く、破壊
時間はわずか長くなったに過ぎず、顕著な効果は認めら
れなかった。As is clear from the test results shown in Table 2, the number of trees generated in the cables using ethylene-propylene broth copolymer as the insulator (Examples 1 and 2) was higher than that in the polyethylene insulated cables (Comparative Examples 2 and 8). ) and polypropylene insulated cable (Comparative Example 4), it is found that the breakdown time is also longer, and the cable has excellent long-term underwater life characteristics. In addition, even though the same ethylene-propylene copolymer is used as the insulator, the random copolymer (Comparative Example 1) has a higher number of trees than the conventional polyethylene insulated cable (Comparative Example 3). , and the failure time was only slightly longer, and no significant effect was observed.
Claims (2)
されたエチレン−プロピレンブロック共重合体を主組成
物とした絶縁層を有することを特徴とする電気絶縁ケー
ブル。(1) An electrically insulated cable characterized by having an insulating layer mainly composed of an ethylene-propylene block copolymer or a crosslinked ethylene-propylene block copolymer.
されたエチレン−プロピレンブロック共重合体のエチレ
ン量が、１〜１０％である特許請求の範囲第（１）項記
載の電気絶縁ケーブル。(2) The electrically insulated cable according to claim (1), wherein the ethylene content of the ethylene-propylene block copolymer or crosslinked ethylene-propylene block copolymer is 1 to 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57213064A JPS59103209A (en) | 1982-12-03 | 1982-12-03 | Electrically insulating cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57213064A JPS59103209A (en) | 1982-12-03 | 1982-12-03 | Electrically insulating cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59103209A true JPS59103209A (en) | 1984-06-14 |
Family
ID=16632930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57213064A Pending JPS59103209A (en) | 1982-12-03 | 1982-12-03 | Electrically insulating cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59103209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU239341U1 (en) * | 2023-12-22 | 2025-12-01 | Акционерное общество "Научно-исследовательский институт железнодорожного транспорта" (АО "ВНИИЖТ") | Insulated load-bearing cable for contact network |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521582B2 (en) * | 1976-01-26 | 1980-06-11 | ||
| JPS5725610A (en) * | 1980-07-22 | 1982-02-10 | Hitachi Cable | Insulated wire |
| JPS622402A (en) * | 1985-06-27 | 1987-01-08 | ソシエテ・エレ−ヌ・エス・ア− | Fluorescent tube lamp |
-
1982
- 1982-12-03 JP JP57213064A patent/JPS59103209A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521582B2 (en) * | 1976-01-26 | 1980-06-11 | ||
| JPS5725610A (en) * | 1980-07-22 | 1982-02-10 | Hitachi Cable | Insulated wire |
| JPS622402A (en) * | 1985-06-27 | 1987-01-08 | ソシエテ・エレ−ヌ・エス・ア− | Fluorescent tube lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU239341U1 (en) * | 2023-12-22 | 2025-12-01 | Акционерное общество "Научно-исследовательский институт железнодорожного транспорта" (АО "ВНИИЖТ") | Insulated load-bearing cable for contact network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5999614A (en) | Electrically insulating cable | |
| JPS58225504A (en) | Crosslinked polyethylene cable | |
| WO1985002936A1 (en) | Crosslinked polyethylene cable | |
| EP0152911B1 (en) | Insulated electric cable | |
| JPS60158505A (en) | electrically insulated cable | |
| JPS5998403A (en) | semiconductive composition | |
| JPH103823A (en) | DC cross-linked polyethylene insulated power cable | |
| JPH09129039A (en) | Dc cable | |
| JPH11260158A (en) | Dc power cable | |
| JPS58194210A (en) | Cross-linked polyethylene insulated cable | |
| JPS60158504A (en) | electrically insulated cable | |
| JPH0620530A (en) | Water tree resistant cable | |
| JP2681158B2 (en) | Power cable | |
| JPS64768B2 (en) | ||
| JPH0616366B2 (en) | DC power cable | |
| JPS598209A (en) | electrically insulated cable | |
| JPH0234734Y2 (en) | ||
| JPS5986109A (en) | Plastic power cable | |
| JPS5999615A (en) | Electrically insulating cable | |
| JPS5819811A (en) | Power cable | |
| JPS59181410A (en) | High voltage cable | |
| JPS5999607A (en) | Electrically insulating cable | |
| JPS586244B2 (en) | Denkizetstsuenyoujiyushisoseibutsu | |
| JPH011746A (en) | resin composition | |
| JPH03122908A (en) | Electrically insulated cable |