JPH0214275Y2 - - Google Patents
Info
- Publication number
- JPH0214275Y2 JPH0214275Y2 JP13830084U JP13830084U JPH0214275Y2 JP H0214275 Y2 JPH0214275 Y2 JP H0214275Y2 JP 13830084 U JP13830084 U JP 13830084U JP 13830084 U JP13830084 U JP 13830084U JP H0214275 Y2 JPH0214275 Y2 JP H0214275Y2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- insulating
- electric field
- shielding layer
- slit
- 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
- 230000005684 electric field Effects 0.000 claims description 47
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 11
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000012212 insulator Substances 0.000 description 20
- 239000002184 metal Substances 0.000 description 17
- 238000009413 insulation Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 7
- 239000003989 dielectric material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002040 relaxant effect Effects 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Landscapes
- Cable Accessories (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、ゴム・プラスチツク絶縁ケーブルの
絶縁接続部に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an insulated connection part of a rubber/plastic insulated cable.
［従来の技術］
従来のゴム・プラスチツクケーブルの絶縁接続
部においては、第２図に示すように接続すべき双
方のゴム・プラスチツクケーブル１のケーブル絶
縁体２がテーパ状にそれぞれ除去成形され、その
先端からそれぞれ露出されたケーブル導体３は接
続スリーブで相互に圧縮接続されて導体接続部４
が形成されている。この導体接続部４を中心とし
たケーブル絶縁体２上には絶縁テープ巻き或は金
型による射出成形若しくは押出し成形により補強
絶縁体５が設けられている。通常、補強絶縁体５
上には半導電性テープを巻回するか或は半導電性
熱収縮チユーブを収縮被覆させるかして遮蔽層６
が設けられている。補強絶縁体５と遮蔽層６とは
一体に加熱架橋されて融着されている。[Prior Art] In the conventional insulated joint of rubber/plastic cables, as shown in Fig. 2, the cable insulators 2 of both rubber/plastic cables 1 to be connected are removed and formed into a tapered shape. The cable conductors 3 exposed from their tips are compressed and connected to each other by a connection sleeve to form a conductor connection part 4.
is formed. A reinforcing insulator 5 is provided on the cable insulator 2 around the conductor connection portion 4 by wrapping with an insulating tape, injection molding with a mold, or extrusion molding. Normally, reinforcing insulator 5
A shielding layer 6 is formed on the top by wrapping a semiconductive tape or shrink-covering a semiconductive heat shrink tube.
is provided. The reinforcing insulator 5 and the shielding layer 6 are heat-crosslinked and fused together.
このとき、該接続部を絶縁接続部とするため遮
蔽層６を絶縁遮蔽層６Ａ，６Ｂとして左右に縁切
りする必要がある。縁切り方法として従来行われ
ていたのは次の２つの方法である。 At this time, in order to make the connection part an insulating connection part, it is necessary to cut the edges of the shielding layer 6 to the left and right as insulating shielding layers 6A and 6B. The following two methods have been conventionally used to cut edges.
(1) 左右の絶縁遮蔽層６Ａ，６Ｂを部分的に同心
状に重ね合せることにより絶縁スリツトを形成
し、その間に遮蔽層間の耐電圧性能を有する絶
縁材料を充填する。(1) An insulating slit is formed by partially concentrically overlapping the left and right insulating shielding layers 6A and 6B, and an insulating material having withstand voltage performance between the shielding layers is filled between them.
(2) 前述した(1)の絶縁遮蔽層６Ａ，６Ｂの先端の
変形や接着不良を防止し、且つ電界緩和を図る
目的で、第２図に示すように、先端を対向させ
た絶縁遮蔽層６Ａ，６Ｂ間の絶縁間隔の部分に
例えば高誘電体からなる電界緩和層７を介在さ
せる。電界緩和層７としては、交流の固有抵抗
ρが107〜1010Ωcm、電流電圧の位相角が60〜
90degとなる高誘電体が用いられている。電界
緩和材料としては、ゴム又はプラスチツク基材
に炭化珪素やカーボン等を充填した高誘電体材
料を用い、これをテープ状にして補強絶縁体５
上に巻回し、加熱架橋して補強絶縁体５に一体
に融着する方法がとられる。なお、絶縁遮蔽層
６Ａ，６Ｂ上には金属遮蔽層８Ａ，８Ｂが設け
られている。(2) In order to prevent deformation and poor adhesion of the tips of the insulating shielding layers 6A and 6B mentioned above in (1) and to alleviate the electric field, the insulating shielding layers have their tips facing each other as shown in Fig. 2. An electric field relaxation layer 7 made of, for example, a high dielectric material is interposed between the insulation gaps 6A and 6B. The electric field relaxation layer 7 has an AC specific resistance ρ of 10 7 to 10 10 Ωcm, and a current voltage phase angle of 60 to 10 Ωcm.
A high dielectric material of 90deg is used. As the electric field mitigation material, a high dielectric material made of a rubber or plastic base material filled with silicon carbide, carbon, etc. is used, and this is made into a tape shape and a reinforcing insulator 5 is used.
A method is used in which the reinforcing insulator 5 is wound on top, heat-crosslinked, and fused to the reinforcing insulator 5. Note that metal shielding layers 8A and 8B are provided on the insulating shielding layers 6A and 6B.
［考案が解決しようとする問題点］
しかしながら、高誘電体材料で電界緩和層７を
形成した場合、その誘電率は一般に20〜800と有
限であり、第２図に示すように電界９がもれ出す
欠点がある。金属遮蔽層が電界緩和層７上にない
場合、ケーブル線路の運転時には接続部の表面に
電位が生じ、人体に危険である。また、第３図に
示すように接続部の外周に、縁切り絶縁筒１０を
有する金属保護管１１Ａ，１１Ｂを被せて金属遮
蔽体とする場合もあるが、この場合には金属保護
管１１Ａ，１１Ｂに電界がかかり、所定の耐電圧
性能が得られなくなる欠点がある。[Problems to be solved by the invention] However, when the electric field relaxation layer 7 is formed of a high dielectric material, its dielectric constant is generally limited to 20 to 800, and as shown in FIG. There are drawbacks to this. If the metal shielding layer is not on the electric field relaxation layer 7, a potential will be generated on the surface of the connection part during operation of the cable line, which is dangerous to the human body. Further, as shown in FIG. 3, metal protection tubes 11A and 11B having edge-cut insulating tubes 10 may be placed over the outer periphery of the connection portion to form a metal shield, but in this case, metal protection tubes 11A and 11B It has the disadvantage that an electric field is applied to it, making it impossible to obtain the specified withstand voltage performance.
本考案の目的は、耐電圧性能が高く、且つ安全
な構造のゴム・プラスチツクケーブルの絶縁接続
部を提供するにある。 The object of the present invention is to provide an insulated joint for a rubber/plastic cable that has a high withstand voltage performance and a safe structure.
［問題点を解決するための手段］
本考案は、ケーブル導体接続部を覆う絶縁補強
層の外周には縁切り間隔をもつて相互に絶縁され
て絶縁遮蔽層が形成され、前記両絶縁遮蔽層の先
端間の前記縁切り間隔の部分には電界緩和層が設
けられているゴム・プラスチツク絶縁ケーブルの
絶縁接続部において、前記電界緩和層の外周には
スリツト絶縁層が設けられ、前記スリツト絶縁層
の外周には片側の前記絶縁遮蔽層に電気的に接続
された縁切り部遮蔽層が設けられ、該縁切り部遮
蔽層と他方の前記絶縁遮蔽層との間に前記スリツ
ト絶縁層を介して絶縁スリツトが形成されている
ことを特徴としている。[Means for Solving the Problems] In the present invention, insulating shielding layers are formed on the outer periphery of the insulating reinforcing layer that covers the cable conductor connection portion and are insulated from each other with an edge spacing, and both of the insulating shielding layers are insulated. In an insulated connection portion of a rubber/plastic insulated cable in which an electric field relaxation layer is provided at the edge cutting interval between the tips, a slit insulation layer is provided on the outer periphery of the electric field relaxation layer, and a slit insulation layer is provided at the outer periphery of the slit insulation layer. is provided with an edge cut portion shielding layer electrically connected to the insulating shield layer on one side, and an insulating slit is formed between the edge cut portion shielding layer and the other insulating shield layer via the slit insulating layer. It is characterized by being
［考案の作用］
このように電界緩和層の外周にスリツト絶縁層
を介して縁切り部遮蔽層を設けると、電界緩和層
の部分では電界はこの縁切り部遮蔽層で抑えら
れ、僅かに電界緩和層上にもれ出す程度であり、
勿論、縁切り部遮蔽層の外にはもれ出さなくな
る。[Operation of the device] When the edge-cut shielding layer is provided on the outer periphery of the electric field relaxation layer through the slit insulating layer in this way, the electric field is suppressed by the edge-cut shielding layer in the area of the electric field relaxation layer, and the electric field relaxation layer is slightly It only leaks to the top,
Of course, it will not leak out of the edge cutting portion shielding layer.
［実施例］
以下本考案に係るゴム・プラスチツク絶縁ケー
ブルの第１実施例を第１図Ａ，Ｂを参照して詳細
に説明する。本実施例では、接続すべき架橋ポリ
エチレン絶縁ケーブルの如きゴム・プラスチツク
絶縁ケーブル１はそのケーブル絶縁体２の端部が
テーパ状に加工され、その先端から露出されたケ
ーブル導体３が接続スリーブで圧縮接続されて導
体接続部４が形成されている。この導体接続部４
の表面が平滑に加工された状態で、その外周には
半導電性テープが巻回されヒータにて加熱融着架
橋がなされて内部半導電層１２が形成されてい
る。導体接続部４を中心としてその両側のケーブ
ル絶縁体２に跨つてその外周に絶縁テープ巻き或
は金型を用いた押出成形により補強絶縁体５が形
成されている。補強絶縁体５の外周には、両側の
図示しないケーブル外部半導電層と電気的に接続
した半導電性テープを補強絶縁体５のスロープに
沿つて巻き上げ中央付近で例えば80mm程度縁切り
間隔をあけて対向させることにより絶縁遮蔽層６
Ａ，６Ｂが形成されている。これら絶縁遮蔽層６
Ａ，６Ｂ間の縁切り間隔の部分における補強絶縁
体５の外周には、例えばゴム基体100部、炭化珪
素100部、カーボン５部からなる電界緩和テープ
の巻回により電界緩和層７が設けられている。絶
縁遮蔽層６Ａ，６Ｂと電界緩和層７との界面形状
は、等電位線と平行になるようなテーパ状断面と
すれば補強絶縁体５の界面の絶縁遮蔽層６ａ，６
Ｂの先端電界が緩和されて好適である。これらの
接続部は、加熱架橋管の中に入れて一体に加熱融
着され且つ架橋される。絶縁遮蔽層６Ａの外周に
はその先端近くまで金属遮蔽テープの巻付けによ
り金属遮蔽層８Ａが設けられている。電界緩和層
７及び金属遮蔽層８Ａの先端部の外周には絶縁テ
ープ例えば自己融着性EPRテープの巻回により
スリツト絶縁層１３が形成されている。スリツト
絶縁層１３の外周には絶縁遮蔽層６Ｂと電気的に
接続されて縁切り部遮蔽層１４が形成されてい
る。縁切り部遮蔽層１４と絶縁遮蔽層６Ａ及び金
属遮蔽層８Ａとの間にはスリツト絶縁層１３を介
して絶縁スリツト１５が形成されている。絶縁遮
蔽層６Ｂ及び縁切り部遮蔽層１４の外周には連続
して金属テープの巻回により金属遮蔽層８Ｂが形
成されている。[Embodiment] A first embodiment of the rubber-plastic insulated cable according to the present invention will be described in detail below with reference to FIGS. 1A and 1B. In this embodiment, a rubber/plastic insulated cable 1 such as a cross-linked polyethylene insulated cable to be connected has an end portion of a cable insulator 2 tapered, and a cable conductor 3 exposed from the tip is compressed with a connecting sleeve. They are connected to form a conductor connection portion 4. This conductor connection part 4
With the surface processed to be smooth, a semiconductive tape is wound around its outer periphery, and the inner semiconductive layer 12 is formed by heat-sealing and crosslinking with a heater. A reinforcing insulator 5 is formed on the outer periphery of the cable insulator 2 on both sides of the conductor connection part 4 by wrapping it with an insulating tape or extruding it using a mold. Around the outer periphery of the reinforcing insulator 5, a semiconductive tape electrically connected to the external semiconductive layer of the cable (not shown) on both sides is rolled up along the slope of the reinforcing insulator 5, with an edge cut interval of about 80 mm, for example, in the vicinity of the center. By facing the insulating shielding layer 6
A and 6B are formed. These insulating shielding layers 6
An electric field relaxation layer 7 is provided on the outer periphery of the reinforcing insulator 5 at the edge cutting interval between A and 6B by winding an electric field relaxation tape made of, for example, 100 parts of a rubber base, 100 parts of silicon carbide, and 5 parts of carbon. There is. If the interface shape of the insulating shielding layers 6A, 6B and the electric field relaxation layer 7 is a tapered cross section parallel to the equipotential line, the insulating shielding layers 6a, 6 at the interface of the reinforcing insulator 5
This is preferable because the electric field at the tip of B is relaxed. These connections are placed in a heat-crosslinked tube and heat fused and crosslinked together. A metal shielding layer 8A is provided around the outer periphery of the insulating shielding layer 6A by wrapping a metal shielding tape close to its tip. A slit insulating layer 13 is formed around the outer periphery of the tip portions of the electric field relaxation layer 7 and the metal shielding layer 8A by winding an insulating tape, for example, a self-bonding EPR tape. An edge-cut portion shielding layer 14 is formed on the outer periphery of the slit insulating layer 13 and electrically connected to the insulating shielding layer 6B. An insulating slit 15 is formed with a slit insulating layer 13 interposed between the edge cutting portion shielding layer 14, the insulating shielding layer 6A, and the metal shielding layer 8A. A metal shielding layer 8B is continuously formed around the outer periphery of the insulating shielding layer 6B and the edge cut portion shielding layer 14 by winding a metal tape.
絶縁遮蔽層６Ａ及び金属遮蔽層８Ａとこれに対
向する縁切り部遮蔽層１４との間隔は、この間隔
でシース間インパルス耐電圧値に耐えればよいか
ら、スリツト絶縁層１３の絶縁厚は絶縁遮蔽層６
Ａの先端付近で所定の厚さを確保できればよく、
電界緩和層７に沿い絶縁遮蔽層６Ｂに向つて次第
に厚さを薄くしてもよい。 Since the distance between the insulating shielding layer 6A and the metal shielding layer 8A and the edge cut portion shielding layer 14 facing them is sufficient to withstand the inter-sheath impulse withstand voltage value, the insulation thickness of the slit insulating layer 13 is equal to that of the insulating shielding layer. 6
It is sufficient if the specified thickness can be secured near the tip of A.
The thickness may be gradually reduced along the electric field relaxation layer 7 toward the insulating shielding layer 6B.
このような絶縁接続部によれば、電界は縁切り
部遮蔽層１４で抑えられ、僅かに電界緩和層７上
にもれ出す程度であり、勿論、縁切り部遮蔽層１
４の外にはもれ出さず、安全かつ安定した絶縁性
能を得ることができる。 According to such an insulated connection part, the electric field is suppressed by the edge cutting part shielding layer 14 and only slightly leaks onto the electric field relaxation layer 7. Of course, the electric field is suppressed by the edge cutting part shielding layer 14.
4, and safe and stable insulation performance can be obtained.
次に、第２実施例について説明する。この場合
には、前述した第１実施例と同様に補強絶縁体５
を形成した後、所定の位置に電界緩和テープを巻
回して電界緩和層７が形成され、その両側の補強
絶縁体５の外周に半導電性収縮チユーブの収縮被
覆により絶縁遮蔽層６Ａ，６Ｂが形成され、電界
緩和層７と絶縁遮蔽層６Ａ，６Ｂとの外周には架
橋剤入り未架橋絶縁テープの巻回によりスリツト
絶縁層１３が形成され、該スリツト絶縁層１３の
上には半導電性テープの巻回により縁切り部遮蔽
層１４が片側の絶縁遮蔽層６Ｂに電気的に接続さ
れて形成され、補強絶縁体５と絶縁遮蔽層６Ａと
電界緩和層７と絶縁遮蔽層６Ｂとスリツト絶縁層
１３と縁切り部遮蔽層１４は加熱されて架橋融着
されている。絶縁遮蔽層６Ａの外周にはその後に
金属遮蔽テープの巻回により金属遮蔽層８Ａが設
けられ、絶縁遮蔽層６Ｂと縁切り部遮蔽層１４の
外周には金属遮蔽テープの巻回により金属遮蔽層
８Ｂが設けられている。 Next, a second example will be described. In this case, the reinforcing insulator 5
After forming the electric field relaxation tape, the electric field relaxation tape is wound at a predetermined position to form the electric field relaxation layer 7, and the insulation shielding layers 6A and 6B are formed around the outer periphery of the reinforcing insulator 5 on both sides by shrink coating with semiconductive shrink tubes. A slit insulating layer 13 is formed on the outer periphery of the electric field relaxation layer 7 and the insulating shielding layers 6A and 6B by winding an uncrosslinked insulating tape containing a crosslinking agent. The edge cutting portion shielding layer 14 is electrically connected to the insulating shielding layer 6B on one side by winding the tape, and the reinforcing insulator 5, the insulating shielding layer 6A, the electric field relaxation layer 7, the insulating shielding layer 6B, and the slit insulating layer are formed. 13 and the edge cut portion shielding layer 14 are heated and cross-linked and fused. A metal shielding layer 8A is then provided on the outer periphery of the insulating shielding layer 6A by winding a metal shielding tape, and a metal shielding layer 8B is provided on the outer periphery of the insulating shielding layer 6B and the edge cutting portion shielding layer 14 by winding a metal shielding tape. is provided.
このような絶縁接続部によれば、スリツト絶縁
層１３がモールドされた絶縁層となるため、前述
した自己融着性EPRテープ又は自己融着性PEテ
ープと異なり、単位厚さ当りの破壊強度を高くと
れるので、スリツト絶縁層１３の厚さが薄くな
り、電界緩和層７上に縁切り部遮蔽層１４が近づ
くため電界緩和層７からの電界のもれ出しは更に
少なくなり、絶縁遮蔽層６Ａ，６Ｂと電界緩和層
７の境界の電界集中も低減される。モールドする
スリツト絶縁層１３の使用材料としては、補強絶
縁層５と同一の材料を用いることも可能である。 According to such an insulating connection part, since the slit insulating layer 13 becomes a molded insulating layer, unlike the above-mentioned self-bonding EPR tape or self-bonding PE tape, the breaking strength per unit thickness is low. Since the thickness of the slit insulating layer 13 becomes thinner, and the edge cut portion shielding layer 14 approaches the electric field relaxing layer 7, leakage of the electric field from the electric field relaxing layer 7 is further reduced. Electric field concentration at the boundary between 6B and the electric field relaxation layer 7 is also reduced. As for the material used for the slit insulating layer 13 to be molded, it is also possible to use the same material as the reinforcing insulating layer 5.
154KV 3000mm2架橋PE絶縁ケーブルの接続部を
例にとり、従来と本考案とで効果の比較を示すと
次の通りである。電界緩和層上にスリツト絶縁層
を介して縁切り部遮蔽層がない場合、その表面に
は導体・シース間にかかる電位（比誘電率100の
場合）の13％がもれ出して危険であり、また内径
180mmφの保護管に収納した場合、電界緩和層136
mmφとの間に充填したコンパウンドにやはり13％
程度の電界がかかり耐電圧性能上問題になる。こ
れに対し、第１図Ａ，Ｂに示した本考案の第１実
施例ではスリツト絶縁層への電界のもれ出しは８
％に抑えられ且つ縁切り部遮蔽層の外には電界は
全くもれ出さず安全かつ安定した電気特性が得ら
れる。更に、第２実施例では、スリツト絶縁層を
ケーブルと同じ架橋PEとした場合、その厚さは
３mmで済み、電界緩和層からの電界のもれ出しは
５％となり、更に安定した絶縁接続部を提供でき
る。 Taking the connection part of a 154KV 3000mm 2 cross-linked PE insulated cable as an example, a comparison of the effects of the conventional method and the present invention is as follows. If there is no edge-cut shielding layer on the electric field relaxation layer via the slit insulating layer, 13% of the potential applied between the conductor and sheath (in the case of relative permittivity of 100) leaks to the surface, which is dangerous. Also the inner diameter
When stored in a 180mmφ protection tube, the electric field relaxation layer 136
The compound filled between mmφ also has 13%
A certain degree of electric field is applied, which causes problems in terms of withstand voltage performance. On the other hand, in the first embodiment of the present invention shown in FIGS. 1A and B, the electric field leakage to the slit insulating layer is 8.
%, and no electric field leaks outside the edge cutting portion shielding layer, resulting in safe and stable electrical characteristics. Furthermore, in the second embodiment, if the slit insulating layer is made of the same crosslinked PE as the cable, its thickness is only 3 mm, and the electric field leakage from the electric field relaxation layer is 5%, resulting in a more stable insulated connection. can be provided.
［考案の効果］
以上説明したように本考案の絶縁接続部では、
縁切り間隔のところに設けられた電界緩和層の外
周にスリツト絶縁層を介して縁切り部遮蔽層を設
けたので、電界緩和層の部分では電界はこの縁切
り部遮蔽層で抑えられ、僅かに電界緩和層上にも
れ出す程度であり、勿論、縁切り部遮蔽層の外に
はもれ出さなくなる。[Effects of the invention] As explained above, in the insulated connection part of the invention,
Since the edge cutting part shielding layer is provided on the outer periphery of the electric field relaxation layer provided at the edge cutting interval via the slit insulating layer, the electric field is suppressed by this edge cutting part shielding layer in the area of the electric field relaxation layer, and the electric field is slightly relaxed. It only leaks onto the layer, and of course it does not leak out of the edge cutting portion shielding layer.
第１図Ａ，Ｂは本考案に係る絶縁接続部の一実
施例の縦断面図及びその要部拡大部、第２図及び
第３図は従来の絶縁接続部の２種の例を示した縦
断面図である。
１……ゴム・プラスチツク絶縁ケーブル、２…
…ケーブル絶縁体、３……ケーブル導体、４……
導体接続部、５……補強絶縁体、６Ａ，６Ｂ……
絶縁遮蔽層、７……電界緩和層、８Ａ，８Ｂ……
金属遮蔽層、９……電界、１３……スリツト絶縁
層、１４……縁切り部遮蔽層、１５……絶縁スリ
ツト。
FIGS. 1A and 1B are longitudinal cross-sectional views and enlarged portions of essential parts of one embodiment of the insulated connection part according to the present invention, and FIGS. 2 and 3 show two examples of conventional insulated connection parts. FIG. 1...Rubber/plastic insulated cable, 2...
...Cable insulator, 3...Cable conductor, 4...
Conductor connection part, 5...Reinforcement insulator, 6A, 6B...
Insulating shielding layer, 7... Electric field relaxation layer, 8A, 8B...
Metal shielding layer, 9... Electric field, 13... Slit insulating layer, 14... Edge cut portion shielding layer, 15... Insulating slit.
Claims (1)
は縁切り間隔をもつて相互に絶縁されて絶縁遮蔽
層が形成され、前記両絶縁遮蔽層の先端間の前記
縁切り間隔の部分には電界緩和層が設けられてい
るゴム・プラスチツク絶縁ケーブルの絶縁接続部
において、前記電界緩和層の外周にはスリツト絶
縁層が設けられ、前記スリツト絶縁層の外周には
片側の前記絶縁遮蔽層に電気的に接続された縁切
り部遮蔽層が設けられ、該縁切り部遮蔽層と他方
の前記絶縁遮蔽層との間に前記スリツト絶縁層を
介して絶縁スリツトが形成されていることを特徴
とするゴム・プラスチツク絶縁ケーブルの絶縁接
続部。 An insulating shielding layer is formed on the outer periphery of the insulating reinforcing layer covering the cable conductor connection portion so as to be insulated from each other with an edge cut interval, and an electric field relaxation layer is formed between the tips of the two insulating shield layers at the edge cut interval. In the insulated connection portion of the provided rubber/plastic insulated cable, a slit insulating layer is provided on the outer periphery of the electric field relaxation layer, and the slit insulating layer is electrically connected to the insulating shielding layer on one side on the outer periphery of the slit insulating layer. A rubber/plastic insulated cable characterized in that an edge cut portion shielding layer is provided, and an insulating slit is formed between the edge cut portion shielding layer and the other insulating shield layer via the slit insulating layer. Insulated connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13830084U JPH0214275Y2 (en) | 1984-09-12 | 1984-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13830084U JPH0214275Y2 (en) | 1984-09-12 | 1984-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6155430U JPS6155430U (en) | 1986-04-14 |
| JPH0214275Y2 true JPH0214275Y2 (en) | 1990-04-18 |
Family
ID=30696694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13830084U Expired JPH0214275Y2 (en) | 1984-09-12 | 1984-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214275Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6447966A (en) * | 1987-08-19 | 1989-02-22 | Hitachi Cable | Detection of partial discharge for cable line |
-
1984
- 1984-09-12 JP JP13830084U patent/JPH0214275Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6155430U (en) | 1986-04-14 |
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