JPH0347412Y2 - - Google Patents
Info
- Publication number
- JPH0347412Y2 JPH0347412Y2 JP2461285U JP2461285U JPH0347412Y2 JP H0347412 Y2 JPH0347412 Y2 JP H0347412Y2 JP 2461285 U JP2461285 U JP 2461285U JP 2461285 U JP2461285 U JP 2461285U JP H0347412 Y2 JPH0347412 Y2 JP H0347412Y2
- Authority
- JP
- Japan
- Prior art keywords
- insulating layer
- cable
- urethane resin
- conductor
- resistance
- 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.)
- Expired
Links
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 15
- 239000004020 conductor Substances 0.000 claims description 11
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 5
- 239000011152 fibreglass Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
Landscapes
- Cable Accessories (AREA)
Description
【考案の詳細な説明】
（考案の技術分野）
本考案は、試験等において高電圧が印加される
ケーブルの終端部に関する。[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to an end portion of a cable to which a high voltage is applied during a test or the like.
（考案の技術的背景とその問題点）
ケーブルの直流耐圧試験等を行う場合、第３図
に示すように、ケーブル端末の外部半導電層１部
分を除去して絶縁層２を露出させ、この絶縁層２
上に抵抗体３を設けると共に、外部半導電層１を
接地している。そして、導体４に直流高電圧を印
加してケーブルの直流耐圧特性等を測定してい
た。(Technical background of the invention and its problems) When conducting a DC withstand voltage test of a cable, as shown in Figure 3, a portion of the outer semiconducting layer 1 of the cable terminal is removed to expose the insulating layer 2. Insulating layer 2
A resistor 3 is provided thereon, and the external semiconducting layer 1 is grounded. Then, a DC high voltage was applied to the conductor 4 to measure the DC withstand voltage characteristics of the cable.
ところで、絶縁層２上に設ける抵抗体３は、従
来、1012〜1013Ω・cmの抵抗値を有する自己融着
性テープを巻き付け、又は同様の抵抗値を有する
熱収縮性チユーブを被着することにより形成され
ている。 By the way, the resistor 3 provided on the insulating layer 2 has conventionally been wound with a self-adhesive tape having a resistance value of 10 12 to 10 13 Ω·cm, or covered with a heat-shrinkable tube having a similar resistance value. It is formed by
しかし、このように抵抗体３を自己融着性テー
プや熱収縮性チユーブで形成すると、抵抗体３と
絶縁層２との間に間隙が生じるので、導体４に直
流高電圧を印加した場合抵抗体３と絶縁層２の劣
化部との間で部分放電が発生し、試験中にケーブ
ルの耐圧特性が低下してしまう欠点があつた。 However, when the resistor 3 is formed of self-adhesive tape or heat-shrinkable tube in this way, a gap is created between the resistor 3 and the insulating layer 2, so when a high DC voltage is applied to the conductor 4, the resistance There was a drawback that partial discharge occurred between the body 3 and the deteriorated portion of the insulating layer 2, and the voltage resistance characteristics of the cable decreased during the test.
抵抗体３と絶縁層２との間隙に特殊な高抵抗液
体を注入することも行われているが、該高抵抗液
体は比較的短期間で蒸発してしまうことから、部
分放電の発生を完全に防止することは不可能であ
る。 A special high-resistance liquid is injected into the gap between the resistor 3 and the insulating layer 2, but since the high-resistance liquid evaporates in a relatively short period of time, it is impossible to completely prevent partial discharge from occurring. It is impossible to prevent this.
（考案の目的）
本考案の目的は、高電圧を印加しても部分放電
が発生することのないケーブルの終端部を提供す
ることにある。(Purpose of the invention) An object of the invention is to provide a cable termination that does not cause partial discharge even when a high voltage is applied.
（考案の概要）
本考案は、導体上の絶縁層若しくはケーブル端
末の挿入された絶縁材上に、液体状態から固体状
態に変化する室温硬化型の高抵抗ウレタン樹脂を
設けたことを特徴とする。(Summary of the invention) The invention is characterized in that a high-resistance urethane resin that hardens at room temperature and changes from a liquid state to a solid state is provided on an insulating layer on a conductor or on an insulating material into which a cable terminal is inserted. .
（考案の実施例）
以下、本考案の実施例を図面を参照して詳細に
説明する。(Embodiments of the invention) Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.
本考案に係るケーブルの終端部は、第１図に示
すように、ケーブル端末において外部半導電層１
部分が除去されて絶縁層２が露出し、絶縁層２の
一端側からは導体４が突出している。外部半導電
層１はその上に巻回されている銅テープ等（図示
せず）と共に遮蔽層を形成して接地されている。 As shown in FIG.
A portion is removed to expose the insulating layer 2, and a conductor 4 protrudes from one end of the insulating layer 2. The external semiconducting layer 1 forms a shielding layer together with a copper tape (not shown) wound thereon and is grounded.
絶縁層２上には外部半導電層１及び突出してい
る導体４に跨つて高抵抗を有する室温硬化型のウ
レタン樹脂５が設けられている。この室温硬化型
のウレタン樹脂５としては、例えば、商品名
ECCOCOAT（Emerson ＆ Cuming，Inc.
製）があり、絶縁層２上への塗布時には液状であ
るが、時間の経過に伴なつて硬化し、固体に変化
する。従つて、絶縁層２とウレタン樹脂５との間
に間隙が生じるのを有効に防止することができる
上に蒸発する等の問題が生じることもなくなる。
そして、このECCOCOATから成るウレタン樹
脂５は体積固有抵抗値が５×1012Ω・cmと非常に
大きいので、高抵抗体として優れ、かつ引張強さ
が295Kg／cm2、引裂強さが22.5Kg／cm2、伸び率が
600％と機械的強度の点でも優れている。従つて、
ウレタン樹脂５に繰り返して曲げが加わつても破
断することがない。 A room temperature curing urethane resin 5 having high resistance is provided on the insulating layer 2, spanning the outer semiconducting layer 1 and the protruding conductor 4. As this room temperature curing type urethane resin 5, for example, the product name
ECCOCOAT (Emerson & Cuming, Inc.
Although it is liquid when applied onto the insulating layer 2, it hardens and becomes solid over time. Therefore, the formation of a gap between the insulating layer 2 and the urethane resin 5 can be effectively prevented, and problems such as evaporation will not occur.
The urethane resin 5 made of ECCOCOAT has a very large volume resistivity value of 5×10 12 Ω・cm, so it is excellent as a high-resistance material, and has a tensile strength of 295 Kg/cm 2 and a tear strength of 22.5 Kg. /cm 2 , the elongation rate is
It also has excellent mechanical strength of 600%. Therefore,
Even if the urethane resin 5 is repeatedly bent, it will not break.
以上のように、絶縁層２上にECCOCOATか
ら成るウレタン樹脂５を設け、導体４に80kVの
直流高電圧を印加し、直流耐圧試験を行つたとこ
ろ、絶縁層２とウレタン樹脂５との間で部分放電
が全く発生しなかつた。 As described above, when the urethane resin 5 made of ECCOCOAT was provided on the insulating layer 2 and a DC high voltage of 80 kV was applied to the conductor 4 to perform a DC withstand voltage test, it was found that between the insulating layer 2 and the urethane resin 5 No partial discharge occurred.
第２図には本考案の他の実施例が示されてい
る。即ち、この実施例では、ガラス繊維強化プラ
スチツク筒６内にケーブル端末が挿入されてお
り、ケーブル端末の導体は上部金具７に接続さ
れ、外部半導電層は下部金具８に接続され、下部
金具８は接地されている。そして、ガラス繊維強
化プラスチツク筒６上にECCOCOATから成る
ウレタン樹脂５が設けられている。 FIG. 2 shows another embodiment of the invention. That is, in this embodiment, the cable terminal is inserted into the glass fiber reinforced plastic tube 6, the conductor of the cable terminal is connected to the upper fitting 7, the outer semiconductive layer is connected to the lower fitting 8, and the conductor of the cable terminal is connected to the lower fitting 8. is grounded. A urethane resin 5 made of ECCOCOAT is provided on the glass fiber reinforced plastic cylinder 6.
この実施例においても、上部金具７に80kVの
直流高電圧を印加し、直流耐圧試験を行つたとこ
ろ、ガラス繊維強化プラスチツク筒６とウレタン
樹脂５との間で部分放電が全く生じなかつた。こ
れに対して、下部金具８近傍のウレタン樹脂部分
５ａを除去して直流耐圧試験を行つたところ、20
〜30PCの部分放電が発生した。 In this example as well, when a DC high voltage of 80 kV was applied to the upper metal fitting 7 and a DC withstand voltage test was performed, no partial discharge occurred between the glass fiber reinforced plastic tube 6 and the urethane resin 5. On the other hand, when we removed the urethane resin portion 5a near the lower metal fitting 8 and conducted a DC pressure test, we found that 20
~30PC partial discharge occurred.
尚、上記二実施例で交流高電圧を印加しても部
分放電は生じなかつた。 Incidentally, in the above two examples, no partial discharge occurred even when an AC high voltage was applied.
（考案の効果）
本考案によれば、導体上の絶縁層上若しくはケ
ーブル端末の挿入された絶縁材上に、液体状態か
ら固体状態に変化する室温硬化型の高抵抗ウレタ
ン樹脂を設けたことで、絶縁層若しくは前記絶縁
材と高抵抗体である高抵抗ウレタン樹脂との間で
間隙が生じることがなくなる。従つて、直流高電
圧の印加時にこれらの間で部分放電が生じるのを
有効に防止することができるので、直流耐圧試験
等に好適なケーブルの終端部を提供することがで
きる。(Effects of the invention) According to the invention, a high-resistance urethane resin that hardens at room temperature and changes from a liquid state to a solid state is provided on the insulating layer on the conductor or on the insulating material into which the cable terminal is inserted. There is no gap between the insulating layer or the insulating material and the high-resistance urethane resin, which is a high-resistance material. Therefore, it is possible to effectively prevent partial discharge from occurring between them when a DC high voltage is applied, so that it is possible to provide a cable termination section suitable for DC withstand voltage tests and the like.
第１図は本考案に係るケーブルの終端部の断面
図、第２図は本考案の他の実施例に係るケーブル
の終端部の一部を断面して示す側面図、第３図は
従来のケーブルの終端部の断面図である。
１……外部半導電層、２……絶縁層、４……導
体、５……室温硬化型の高抵抗ウレタン樹脂。
FIG. 1 is a sectional view of the terminal end of a cable according to the present invention, FIG. 2 is a side view showing a part of the terminal end of a cable according to another embodiment of the present invention, and FIG. 3 is a conventional FIG. 3 is a cross-sectional view of the terminal end of the cable. DESCRIPTION OF SYMBOLS 1... External semiconducting layer, 2... Insulating layer, 4... Conductor, 5... Room temperature curing high resistance urethane resin.
Claims (1)
て、導体上に設けられている絶縁層若しくはケー
ブル端末の挿入されている絶縁材上に、室温硬化
型の高抵抗ウレタン樹脂が設けられていることを
特徴とするケーブルの終端部。 At the end of the cable to which high voltage is applied, a room temperature curing high resistance urethane resin is provided on the insulating layer provided on the conductor or the insulating material into which the cable terminal is inserted. A cable termination section characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2461285U JPH0347412Y2 (en) | 1985-02-22 | 1985-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2461285U JPH0347412Y2 (en) | 1985-02-22 | 1985-02-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61141932U JPS61141932U (en) | 1986-09-02 |
| JPH0347412Y2 true JPH0347412Y2 (en) | 1991-10-09 |
Family
ID=30518923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2461285U Expired JPH0347412Y2 (en) | 1985-02-22 | 1985-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0347412Y2 (en) |
-
1985
- 1985-02-22 JP JP2461285U patent/JPH0347412Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61141932U (en) | 1986-09-02 |
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