JPH0214276Y2 - - Google Patents
Info
- Publication number
- JPH0214276Y2 JPH0214276Y2 JP15998984U JP15998984U JPH0214276Y2 JP H0214276 Y2 JPH0214276 Y2 JP H0214276Y2 JP 15998984 U JP15998984 U JP 15998984U JP 15998984 U JP15998984 U JP 15998984U JP H0214276 Y2 JPH0214276 Y2 JP H0214276Y2
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- insulating
- layer
- field relaxation
- 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 58
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 229920003023 plastic Polymers 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 8
- 239000012212 insulator Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 5
- 239000003989 dielectric material Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- 238000004804 winding Methods 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
- 238000000034 method Methods 0.000 description 2
- 230000000116 mitigating effect Effects 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
- 231100000681 Certain safety factor Toxicity 0.000 description 1
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005096 rolling process 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３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. 3, 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３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。(2) In order to prevent deformation and poor adhesion of the tips of the insulating shielding layers 6A and 6B mentioned in (1) above and to alleviate the electric field, the insulating shielding layers have their tips facing each other as shown in FIG. 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, cross-linked by heating, and fused together to the reinforcing insulator 5.
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、図示のように電界８がもれ出す欠点が
ある。電界緩和層７の上に金属遮蔽層がない場
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。 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 there is a drawback that the electric field 8 leaks as shown in the figure. If there is no metal shielding layer on the electric field mitigation 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.
これを改善するために本出願人は第４図に示す
ような絶縁接続部を提案した。この絶縁接続部
は、電界緩和層７の外周に絶縁テープの巻回等に
よりスリツト絶縁層９が設けられ、このスリツト
絶縁層９の外周には片側の絶縁遮蔽層６Ｂに電気
的に接続された縁切り部遮蔽層１０が設けられ、
該縁切り部遮蔽層１０と他方の絶縁遮蔽層６Ａと
の間にスリツト絶縁層９を介して絶縁スリツト１
１が設けられた構造になつている。 In order to improve this problem, the applicant proposed an insulated connection part as shown in FIG. In this insulating connection part, a slit insulating layer 9 is provided on the outer periphery of the electric field relaxation layer 7 by winding an insulating tape or the like, and the slit insulating layer 9 is electrically connected to the insulating shielding layer 6B on one side. An edge cutting portion shielding layer 10 is provided,
An insulating slit 1 is inserted between the edge cutting portion shielding layer 10 and the other insulating shielding layer 6A with a slit insulating layer 9 interposed therebetween.
1 is provided.
このような絶縁接続部によれば、電界緩和層７
の部分では電界８は縁切り部遮蔽層１０で抑えら
れ、僅かに電界緩和層７上にもれ出す程度になる
利点がある。 According to such an insulating connection part, the electric field relaxation layer 7
There is an advantage that the electric field 8 is suppressed by the edge cutting portion shielding layer 10 and only slightly leaks onto the electric field relaxation layer 7 in the portion shown in FIG.
［考案が解決しようとする問題点］
しかしながら、このような構造でも電界緩和層
７上に僅かではあるが、電界８がもれ出すので、
ケーブル１の運転中にはスリツト絶縁層９に常に
商用波数の電界８がかかつており、絶縁接続部の
長期寿命性能に影響を与える欠点がある。また、
第４図に示すような構造ではスリツト絶縁層９で
ケーブル導体とシース間の電位の５〜10％を分担
することになり、スリツト絶縁層９及び該スリツ
ト絶縁層９と電界緩和層７の界面、更には電界緩
和層７の端部に常に高い電界がかかるため電気的
弱点がふえることになる。このため、電界緩和層
７とスリツト絶縁層９との界面にギヤツプができ
ぬように、スリツト絶縁層９に巻きむらができぬ
よう、異物が混入しないよう熟練者が注意深く施
工する必要があつた。[Problems to be solved by the invention] However, even with such a structure, the electric field 8 leaks onto the electric field relaxation layer 7, albeit slightly.
During operation of the cable 1, the slit insulating layer 9 is constantly exposed to an electric field 8 at a commercial frequency, which has the drawback of affecting the long-term life performance of the insulated connection. Also,
In the structure shown in FIG. 4, the slit insulating layer 9 shares 5 to 10% of the potential between the cable conductor and the sheath. Furthermore, since a high electric field is always applied to the end of the electric field relaxation layer 7, electrical weaknesses increase. For this reason, it was necessary for an expert to carefully perform the construction to prevent gaps from forming at the interface between the electric field relaxation layer 7 and the slit insulating layer 9, to prevent uneven winding of the slit insulating layer 9, and to prevent foreign matter from getting mixed in. .
本考案の目的は、縁切り部に常時電界をほとん
どかけない構造のゴム・プラスチツク絶縁ケーブ
ルの絶縁接続部を提供するにある。 An object of the present invention is to provide an insulated connection section for a rubber/plastic insulated cable that has a structure in which almost no electric field is constantly applied to the edge section.
［問題点を解決するための手段］
本考案に係るゴム・プラスチツク絶縁ケーブル
の絶縁接続部は、電界緩和層の外周には電界緩和
材により片側からスロープ状に外径を増した後一
定外径に変る形状のスリツト絶縁・電界緩和層が
設けられ、該スリツト絶縁・電界緩和層の外周に
は片側の絶縁遮蔽層に電気的に接続された縁切り
部遮蔽層に設けられ、該縁切り部遮蔽層と他方の
絶縁遮蔽層との間に前記スリツト絶縁・電界緩和
層を介して絶縁スリツトが形成されていることを
特徴とするものである。[Means for solving the problem] In the insulated connection part of the rubber/plastic insulated cable according to the present invention, the outer diameter is increased in a slope shape from one side by an electric field relaxation material on the outer periphery of the electric field relaxation layer, and then the outer diameter is increased to a constant outside diameter. A slit insulating/electric field relaxation layer having a shape that changes is provided, and on the outer periphery of the slit insulating/electric field relaxation layer, an edge cut portion shielding layer electrically connected to the insulating shield layer on one side is provided, and the edge cut portion shielding layer An insulating slit is formed between the first insulating layer and the other insulating shielding layer via the slit insulating/electric field relaxing layer.
［考案の作用］
このように絶縁スリツトの絶縁層を電界緩和層
と同じに電界緩和材でスリツト絶縁・電界緩和層
として形成すると、電界緩和層からの電界のもれ
出しはほとんどなくなり、縁切り部に電界がほと
んどかからない安定した絶縁性能を得ることがで
きる。[Function of the invention] If the insulating layer of the insulating slit is formed as a slit insulation/electric field relaxation layer using an electric field relaxation material in the same way as the electric field relaxation layer, leakage of the electric field from the electric field relaxation layer will be almost eliminated, and the edge cut portion will be It is possible to obtain stable insulation performance with almost no electric field applied to the
［実施例］
以下本考案に係るゴム・プラスチツク絶縁ケー
ブルの絶縁接続部の一実施例を第１図を参照して
詳細に説明する。なお、前述した第４図と対応す
る部分には同一符号を付して示している。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１３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６Ａ，６Ｂが形成され
ている。これら絶縁遮蔽層６Ａ，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，６Ｂの先端電界が緩和さ
れて好適である。電界緩和層７の外周には、この
電界緩和層７を形成した半導電性テープを、片側
の絶縁遮蔽層６Ｂ側からスロープ状に外径を増し
た後絶縁遮蔽層６Ａの外周で一定外径に変る形状
に巻き上げることによりスリツト絶縁・電界緩和
層１４が形成されている。スリツト絶縁・電界緩
和層１４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１０が形成されている。
縁切り部遮蔽層１０と他方の絶縁遮蔽層６Ａとの
間にはスリツト絶縁・電界緩和層１４を介して絶
縁スリツト１１が形成されている。補強絶縁体５
と、絶縁遮蔽層６Ａ，６Ｂと、電界緩和層７と、
スリツト絶縁・電界緩和層１４と、縁切り部遮蔽
層１０とは、加熱架橋管の中に入れられて一体に
加熱融着され且つ架橋されている。縁切り部遮蔽
層１０の外周には絶縁カバー１２が施されてい
る。[Embodiment] Hereinafter, an embodiment of the insulated connection portion of the rubber/plastic insulated cable according to the present invention will be described in detail with reference to FIG. Note that parts corresponding to those in FIG. 4 described above are designated by the same reference numerals. 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. With the surface of the conductor connecting portion 4 smoothed, a semiconductive tape is wound around the outer periphery and crosslinked by heat fusion using a heater to form the internal semiconductive layer 13. 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, near the center. Insulating shielding layers 6A and 6B are formed by opposing each other. The outer periphery of the reinforcing insulator 5 at the edge cutting interval between these insulating shielding layers 6A and 6B is made of, for example, 100 parts of a rubber base, 100 parts of silicon carbide, 5 parts of carbon, etc.
The electric field relaxation layer 7 is provided by winding an electric field relaxation tape consisting of parts. If the shape of the interface between the insulating shielding layers 6A, 6B and the electric field relaxation layer 7 is a tapered cross section parallel to the equipotential line, the electric field at the tip of the insulating shielding layer 6A, 6B at the interface of the reinforcing insulator 5 will be relaxed. It is suitable for On the outer periphery of the electric field relaxation layer 7, the semiconductive tape on which the electric field relaxation layer 7 is formed is increased in outer diameter in a slope shape from one side of the insulating shielding layer 6B, and then the outer diameter is constant at the outer periphery of the insulating shielding layer 6A. A slit insulating/electric field relaxation layer 14 is formed by rolling it up into a shape that changes. An edge cut portion shielding layer 10 is formed on the outer periphery of the slit insulating/electric field relaxation layer 14 and electrically connected to the insulating shielding layer 6B.
An insulating slit 11 is formed between the edge cutting portion shielding layer 10 and the other insulating shielding layer 6A with a slit insulating/electric field relaxing layer 14 interposed therebetween. Reinforcement insulator 5
, insulating shielding layers 6A and 6B, and electric field relaxation layer 7,
The slit insulating/electric field relaxation layer 14 and the edge cut portion shielding layer 10 are placed in a heat-crosslinked tube and heat-fused and crosslinked together. An insulating cover 12 is provided on the outer periphery of the edge cutting portion shielding layer 10.
スリツト絶縁・電界緩和層１４の形状は、その
上に巻き上げる縁切り部遮蔽層１０と絶縁遮蔽層
６Ａとが一定以上（一般にはケーブルの防蝕層保
護電圧に一定の安全率を乗じた電圧値）耐電圧値
を有するように設計する。 The shape of the slit insulation/electric field relaxation layer 14 is such that the edge cut portion shielding layer 10 and the insulation shielding layer 6A wound thereon can withstand a certain level or more (generally, a voltage value obtained by multiplying the cable's corrosion protection layer protection voltage by a certain safety factor). Design to have a voltage value.
このような本考案の絶縁接続部によれば、シー
ス端縁切り部分を埋める絶縁体が総て電界緩和層
７，１４であるため、補強絶縁体５から外への電
界８のもれ出しは事実上無視することができる。
即ち、本実施例で用いる電界緩和材料は、固有イ
ンピーダンス107〜108Ωcm、等価誘電率150〜200
程度の電気特性をもつため比誘電率が2.3程度の
補強絶縁体５がほとんど総ての電位を分担してし
まうからである。 According to the insulated connection portion of the present invention, the electric field relaxation layers 7 and 14 fill the sheath edge cut portion, so it is true that the electric field 8 does not leak out from the reinforcing insulator 5. The above can be ignored.
That is, the electric field relaxation material used in this example has an intrinsic impedance of 10 7 to 10 8 Ωcm and an equivalent dielectric constant of 150 to 200.
This is because the reinforcing insulator 5, which has a dielectric constant of about 2.3, shares almost all of the potential.
第４図及び第１図にそれぞれの構造での５％の
等電位線を示したが、第４図に示す構造では電界
緩和層７を飛び越えてその上のスリツト絶縁層９
（一般に比誘電率2.3〜3.0）に５〜10％の電位が
分担されるのに対し、第１図に示す本考案の構造
では５％の等電位線に全くゆらぎがなく、電界緩
和層７，１４での電位分担はわずか0.3％であつ
た。 4 and 1 show 5% equipotential lines for each structure, but in the structure shown in FIG. 4, the slit insulating layer 9 jumps over the electric field relaxation layer 7 and
In contrast, in the structure of the present invention shown in FIG. 1, there is no fluctuation at all in the 5% equipotential line, and the electric field relaxation layer 7 , 14, the potential sharing was only 0.3%.
第１図と同様にシース縁切り部を形成し、縁切
り部遮蔽層１０と絶縁遮蔽層６Ａとのオーバーラ
ツプ長を200mmとし、その間のキヤパシタンスを
測定したところ約0.1μFであつた。通常のスリツ
ト型でシース縁切り部を形成した場合は、キヤパ
シタンスは数10pFであり、外部の絶縁筒など組
合わせてもシース間のインピーダンスが高く、片
側からサージが侵入しても通過しない。そのため
通常のケーブル線路では第２図に示すように絶縁
接続部１５のシース間にシース間アレスターと呼
ばれるアレスター１６を挿入してサージインピー
ダンスを下げることによりシース間の閃絡を防止
している。なお、１７は導通接続部である。 The sheath edge cut portion was formed in the same manner as in FIG. 1, and the overlap length between the edge cut portion shielding layer 10 and the insulating shield layer 6A was set to 200 mm, and the capacitance therebetween was measured to be about 0.1 μF. When the sheath edge cut part is formed with a normal slit type, the capacitance is several tens of pF, and even when combined with an external insulating tube, the impedance between the sheaths is high, so even if a surge enters from one side, it will not pass through. Therefore, in a normal cable line, as shown in FIG. 2, an arrester 16 called an inter-sheath arrester is inserted between the sheaths of the insulated connection part 15 to lower the surge impedance and thereby prevent flash shorts between the sheaths. Note that 17 is a conductive connection portion.
これに対し、本考案の絶縁接続部を用い、縁切
り部遮蔽層１０と絶縁遮蔽層６Ａとのオーバーラ
ツプ長を充分長くとれば、サージが透過するよう
な、特に高周波成分に対しては十分インピーダン
スを小さくとれるような縁切り部となるため、シ
ース間アレスターが不要となり、線路全体のシス
テムを極めてシンプル化することができる。 On the other hand, if the insulated connection part of the present invention is used and the overlap length between the edge cutting part shielding layer 10 and the insulating shielding layer 6A is made long enough, the impedance will be sufficient for particularly high frequency components that allow surges to pass through. Since the edge cut can be made small, there is no need for an inter-sheath arrester, and the entire track system can be extremely simplified.
［考案の効果］
以上説明したように本考案に係る絶縁接続部で
は、絶縁スリツト間も電界緩和層で縁切りしたの
で、縁切り部が総て電界緩和層で縁切りされた構
造になり、その結果補強絶縁体の外への電界のも
れ出しが無視できる程僅少となり、縁切り部に常
時電界がほとんどかからない安定した絶縁性能の
絶縁接続部を得ることができる。また、本考案に
よれば縁切り部遮蔽層と絶縁遮蔽層とのオーバー
ラツプ長を長めにすることにより、シース間アレ
スターが不要な絶縁接続部を提供することができ
る。[Effects of the invention] As explained above, in the insulated connection part according to the invention, the edges between the insulating slits are also cut with the electric field relaxation layer, resulting in a structure in which all the edges are cut with the electric field relaxation layer, and as a result, the reinforcement The leakage of the electric field to the outside of the insulator is negligibly small, and an insulated connection part with stable insulation performance can be obtained in which almost no electric field is always applied to the edge cutting part. Further, according to the present invention, by increasing the overlap length between the edge cut portion shielding layer and the insulating shielding layer, it is possible to provide an insulating connection portion that does not require an inter-sheath arrester.
第１図は本考案に係る絶縁接続部の一実施例の
要部縦断面図、第２図は従来のケーブル線路の結
線図、第３図及び第４図は従来の絶縁接続部の要
部縦断面図である。
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、８……電界、９
……スリツト絶縁層、１０……縁切り部遮蔽層、
１１……絶縁スリツト、１４……スリツト絶縁・
電界緩和層。
Fig. 1 is a vertical cross-sectional view of a main part of an embodiment of an insulated connection part according to the present invention, Fig. 2 is a connection diagram of a conventional cable line, and Figs. 3 and 4 are main parts of a conventional insulated connection part. 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, 8... Electric field, 9
...Slit insulating layer, 10... Edge cutting portion shielding layer,
11... Insulating slit, 14... Slit insulating
Electric field relaxation layer.
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片側からス
ロープ状に外径を増した後一定外径に変る形状の
スリツト絶縁・電界緩和層が設けられ、前記スリ
ツト絶縁・電界緩和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・電界緩和層を介し
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 rubber/plastic insulated cable, a slit insulation/electric field relaxation layer is provided around the outer periphery of the electric field relaxation layer, the outer diameter of which increases from one side in a slope shape and then changes to a constant outer diameter. , an edge cut portion shielding layer electrically connected to the insulating shield layer on one side is provided on the outer periphery of the slit insulating/electric field relaxation layer, and the edge cut portion shielding layer is provided between the edge cut portion shielding layer and the insulating shield layer on the other side. An insulated connection part of a rubber/plastic insulated cable, characterized in that an insulating slit is formed through a slit insulation/electric field relaxation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15998984U JPH0214276Y2 (en) | 1984-10-23 | 1984-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15998984U JPH0214276Y2 (en) | 1984-10-23 | 1984-10-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6181728U JPS6181728U (en) | 1986-05-30 |
| JPH0214276Y2 true JPH0214276Y2 (en) | 1990-04-18 |
Family
ID=30717927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15998984U Expired JPH0214276Y2 (en) | 1984-10-23 | 1984-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214276Y2 (en) |
-
1984
- 1984-10-23 JP JP15998984U patent/JPH0214276Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6181728U (en) | 1986-05-30 |
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