JP4260553B2 - Power cable termination connection - Google Patents

Power cable termination connection Download PDF

Info

Publication number
JP4260553B2
JP4260553B2 JP2003165502A JP2003165502A JP4260553B2 JP 4260553 B2 JP4260553 B2 JP 4260553B2 JP 2003165502 A JP2003165502 A JP 2003165502A JP 2003165502 A JP2003165502 A JP 2003165502A JP 4260553 B2 JP4260553 B2 JP 4260553B2
Authority
JP
Japan
Prior art keywords
power cable
soot
internal pressure
stopper
pipe
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 - Lifetime
Application number
JP2003165502A
Other languages
Japanese (ja)
Other versions
JP2005006379A (en
Inventor
澄男 鯉渕
琢也 助川
茂夫 成定
陽一 渡部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
J Power Systems Corp
Original Assignee
J Power Systems Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by J Power Systems Corp filed Critical J Power Systems Corp
Priority to JP2003165502A priority Critical patent/JP4260553B2/en
Publication of JP2005006379A publication Critical patent/JP2005006379A/en
Application granted granted Critical
Publication of JP4260553B2 publication Critical patent/JP4260553B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Description

【0001】
【発明の属する技術分野】
本発明は、電力ケーブル用終端接続部に係り、特に、高電圧用の電力ケーブルの気中終端接続部に関するものである。
【0002】
【従来の技術】
従来の電力ケーブルの気中終端接続部として、例えば、特許文献1に示すものがある。
【0003】
【特許文献1】
特開平10−51938号公報
【0004】
この気中終端接続部は、ケーブルと、ケーブルの終端を囲繞する碍管と、内部補強絶縁を行う電界遮蔽型内部絶縁体とで構成されている。電界遮蔽型内部絶縁体は、エポキシ座とゴム製のプレモールド絶縁体(一般的には、エチレンプロピレンゴム(EPR)絶縁体と半導電層で構成される一体ユニット)を組合わせて構成され、スプリングユニットを用いてプレモールド絶縁体を圧縮することで絶縁性能を確保している。
【0005】
電界遮蔽型内部絶縁体を用いた別の気中終端接続部の構造例として、図4に示すものがある。図4において、ケーブル24の終端部(図面の上側)が支持碍子25により所定箇所に設置された碍管12に内挿されている。碍管12は、磁器またはポリマーにより形成されている。碍管12内では、ケーブル24の被覆部分が除去されたケーブル導体7が導体引出棒1と圧縮接続されている。碍管12には碍管上部パッキン5を介して上部蓋が被せられ、その中央部から、導体引出棒1が気密シールパッキン6を介し大気中に引き出され、架空線や他の機器とリード線にて接続される。気密シールパッキン6は、パッキン締付金具4で上部蓋に締め付けられ、導体引出捧1は碍管12上部で導体固定ロックナット3により固定され、これらが雨覆い2により被覆されている。
【0006】
この気中終端接続部の電界コントロールは、碍管12内のケーブル外部遮蔽層21が除去されたケーブル絶縁体11上に、差し込み式のユニットゴム絶縁体13を挿入することによって許容電界強度内に制御される。また、碍管12内の上部は気体9層が設けてあり、その下側の絶縁油10の温度による膨張・収縮による圧力変化をこの気体9層で吸収し、碍管12の許容内圧値以下に保つようになっている。また、ケーブル導体7と導体引出棒1との接続部分には、これらを気密にシールするための上部導体気密シール8が被覆されている。なお、絶縁油10を使用しないで碍管12内を全て絶縁ガスとする構造の場合もある。
【0007】
碍管12の下部には、碍管12内の絶縁油10または気体9が下部ケーブル側に漏れないように油止めまたはガス止め処理が施される。その一般的な構造は図4及び図5(図4のA部分の拡大図)に示すように、円筒状の油(またはガス)止金具15(以下、「油止金具」と記す)がケーブル外部遮蔽層21に挿通され、この金具15の上下部がテープ処理等によりシールされて油止金具上部シール14、油止金具下部シール20とされる。さらに油止金具15と取付フランジ18との間が、パッキン締付金具16により取付フランジ18に固定されたパッキン17でシールされている。また、取付フランジ18は碍管下部パッキン19を介して碍管12と接続されている。更に、終端接続部の下部にはケーブル外部遮蔽層21を保護するため保護金具22が取り付けられ、更に下部シール23が施されて外部と遮断されている。
【0008】
一般に、図5に示す従来の油止金具15の構造では、内圧0〜0.3MPa程度の範囲で常時使用される。これ以上の内圧になると内圧により油止金具15が鉛直方向(図中の上下方向)に動く可能性があり、この場合は、例えば、図6に示すように、油止金具15aにストッパ15bを設けることが必要になる。
【0009】
【発明が解決しようとする課題】
近年、架空送電線鉄塔から直接地中電力ケーブルへ接続する需要が多くなってきているが、その際もっともコスト的に有利になるのは鉄塔上までケーブルを引き上げ、鉄塔上にケーブル気中終端接続部を設けてダイレクトに架空線からジャンパ線により接続する方法である。この場合終端接続部の重量を軽減し鉄塔強度設計上も有利にすることが求められ、重量の軽いポリマー碍管を使用する例が増加している。また鉄塔上設置の場合、高所にあることから万一の地絡事故時の爆発飛散を絶対に防止することが必要である。ポリマー碍管は磁器碍管に比べ軽量であり、また割れ飛散も少ないことからこのような使用条件に対し有利と考えられている。
【0010】
しかしながら、碍管としてポリマーを用いた場合でも、前記の従来構造では碍管12内で地絡した場合、碍管12内の圧力を制御できず、爆発飛散(固体破片および絶縁油飛散、発火)する可能性があった。また、前記の特許文献1における電力ケーブル用終端接続部においても、同様の問題があった。
【0011】
従って、本発明の目的は、地絡時の内圧上昇による碍管や他の部材の爆発飛散を防止できる電力ケーブル用終端接続部を提供することである。
【0012】
また、近年、電力ケーブル用終端接続部においては、軽量で、かつ施工(取付、組み立て作業)が容易な簡単な構造が要望されている。
【0013】
従って、本発明の他の目的は、地絡時に発生する高い内圧に対しても、複雑な装置や構造を用いることなく、少ない部品数で簡易な放圧構造を提供することである。
【0014】
【課題を解決するための手段】
上記目的を達成するために本発明の電力ケーブル用終端接続部は、当該電力ケーブルの終端部を内挿する碍管と、当該碍管内の前記電力ケーブルの周囲に満たされた絶縁油または絶縁ガスと、前記電力ケーブルが前記碍管へ内挿される電力ケーブル/碍管境界部分において前記電力ケーブルに挿通して設けられ、前記絶縁油または絶縁ガスが前記碍管の外部に漏洩することを防止する漏洩防止金具と、を有する電力ケーブル用終端接続部において、前記漏洩防止金具にフランジ部を設けられ、該フランジ部と前記碍管に接続された取付フランジとの間がシールされて、前記電力ケーブルと前記碍管とを気密にシールし、かつ前記碍管の前記電力ケーブル側端部外側で前記フランジ部の下側で、前記取付フランジの下側に取付けた台座を介して前記漏洩防止金具用ストッパを設け、該ストッパは1MPa未満の碍管内圧までは、前記漏洩防止金具が鉛直方向下方に移動することを防止し、前記碍管内部が1MPa以上の内圧に達すると変形して前記漏洩防止金具を鉛直方向下方に移動させ、前記碍管の内圧を碍管に接続した保護金具内に解放することを特徴とする。
【0015】
前記フランジ部の突起は10mm以上の寸法であることが望ましい。
【0017】
【発明の実施の形態】
以下、本発明の電力ケーブル用終端接続部の実施の形態について図面を参照して説明する。
【0018】
本実施の形態の電力ケーブル用終端接続部においては、全体的な構造は図4に示す従来の電力ケーブル用終端接続部と基本的に変わらないが、破線A部の部分の構造(図5に示す構造)が異なり、図1のように構成されている。
【0019】
図1においては、油止金具28のパッキン17と当接する箇所に、フランジ部28aを設け、この部分の油止金具28の外径を大径化することにより、碍管側(図中上側)からの内圧受圧面積が大きくなるように形成されている。
【0020】
例えば、ケーブル外部遮蔽層21の外径をd1、図5に示す従来のフランジ部を有さない油止金具15の外径をd2、図1に示す本実施の形態の油止金具28のフランジ部28aの外径をd3とし、具体的にd1=90mm、d2=100mm、d3=130mmとすると、図5(従来構造)と比較した図1(本実施態様による構造)によるフランジ面の受ける圧力倍数Pは下式の通り、
P=(d3 2−d1 2)/(d2 2−d1 2
P=4.63
となり、従来構造より4.63倍内圧受圧感度を大きくできる。
【0021】
油止金具28は、非磁性金属により形成することができ、そのフランジ部28aによる突起(d3−d2)の寸法は、上記の内圧受圧感度の点から10mm以上であることが好ましく、特に、終端接続部構造の外径制約上から10〜50mmとすることがより好ましい。
【0022】
更に、取付フランジ18の図面下側には台座26を介してストッパ27が設けられている。このストッパ27は、非磁性金属又は硬質プラスチックにより形成され、通常の使用条件の碍管側内圧ではストッパ27は変形せず有効に機能するようにし、地絡により高い内圧が発生すると変形するように強度が設計されている。また、ストッパ27は、図示のように1箇所だけでなく、複数箇所、例えば4箇所設けることが望ましい。
【0023】
図2は地絡が発生し高い内圧が瞬時に発生(例えば4MPa)したときの放圧動作状況を示したものである。地絡による内圧で油止金具28は図中M方向の力を受け、ストッパ27を折り曲げて下方へ移動する。このため、碍管側の絶縁油やガスは破線の矢印Fのように下部の空間に噴き出し、碍管内の圧力を碍管の内圧破壊強度以下にすることができ、爆発飛散、着火などの現象を防止できる。
【0024】
本実施態様の構造においては、通常使用時の碍管内圧力は0〜0.5MPa程度であるため、ストッパ27の強度は1MPa程度とすることが望ましい。碍管内圧力が1MPa以上になった時、ストッパ27が変形して油止金具28を鉛直方向下方に移動させることができる。しかし、終端接続部の構造、地絡電流などの条件によってストッパ変形強度を変え、1MPa以外の条件を設定することも可能である。また地絡試験時の内圧は154kVXLPEケーブル用終端接続部の場合4MPa以上に達したが、本実施態様の構造で完全に爆発や飛散を防止できることが試験確認された。
【0025】
以上説明したように、本実施の形態の電力ケーブル用終端接続部においては、
(イ)油止金具28用のストッパ27のみを設けることにより、簡単な構造で地絡時の内圧上昇による碍管や他の部材の爆発飛散を防止できる。
(ロ)油止金具28は通常の内圧ではシール金具として機能しているが、地絡時は放圧金具として機能するため、一つの部品に多機能を兼用させることにより部品数の増加を防止できる。
(ハ)油止金具28にフランジ部28aを設け、外径を大きくして受圧面積を大きくしたので、碍管12内の圧力の変化に応じて油止金具28を鉛直方向下方に動きやすくすることができる。
【0026】
なお、本発明の電力ケーブル用終端接続部の他の実施態様を図3に示す。このケーブル終端接続部は、フランジ部29aを油止金具29の下方に設け、更に図1に示す油止金具下部シール20を省略したものである。この実施態様においても、図1に示すケーブル終端接続部と同様の作用により同様の効果を奏することができる。
【0027】
【発明の効果】
本発明の電力ケーブル用終端接続部によれば、以下の効果を奏することができる。
(1)従来構造に比べ追加部品はストッパのみであり、きわめて簡単な構造であるにもかかわらず、地絡時の高内圧による爆発飛散を防止できる。
(2)このため、ケーブル用終端接続部の架空送電線鉄塔上設置が安全にできるようになり、コスト面での計り知れないメリットが生じる。また、従来のように地上設置の場合もさらに安全性がアップする他、人家の近くなど従来設置が懸念された場所でも使用できる。
(3)全ての材質の碍管に採用することができるが、特にポリマー碍管式ケーブル終端接続部の鉄塔上設置に適しており、さらにその有利性が生かせるようになる。
【図面の簡単な説明】
【図1】本発明の電力ケーブル用終端接続部の一実施態様を示す部分断面図である。
【図2】本発明の電力ケーブル用終端接続部の一実施態様における地絡事故時の放圧動作状況を示す部分断面図である。
【図3】本発明の電力ケーブル用終端接続部の他の実施態様を示す部分断面図である。
【図4】従来の電力ケーブル用終端接続部を示す断面図である。
【図5】図4の破線で示すA部分の拡大断面図である。
【図6】従来の電力ケーブル用終端接続部のA部分の他の例を示す拡大断面図である。
【符号の説明】
7 ケーブル導体
9 気体
10 絶縁油
11 ケーブル絶縁体
12 碍管
15 油止金具(漏洩防止金具)
17 パッキン
18 取付フランジ
21 ケーブル外部遮蔽層
24 ケーブル
27 ストッパ
28 油止金具(漏洩防止金具)
28a フランジ部
29 油止金具(漏洩防止金具)
29a フランジ部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power cable termination connection, and more particularly to an air termination connection of a high voltage power cable.
[0002]
[Prior art]
For example, Japanese Patent Application Laid-Open No. H10-133707 discloses a conventional end-of-air connection portion of a power cable.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-51938
This air termination connection part is comprised by the cable, the soot pipe surrounding the termination | terminus of a cable, and the electric field shielding internal insulator which performs internal reinforcement insulation. The electric field shielding internal insulator is composed of a combination of an epoxy seat and a rubber pre-mold insulator (generally, an integrated unit composed of an ethylene propylene rubber (EPR) insulator and a semiconductive layer), Insulation performance is ensured by compressing the pre-mold insulator using a spring unit.
[0005]
FIG. 4 shows another structural example of the air termination connection portion using the electric field shielding internal insulator. In FIG. 4, the end portion (upper side of the drawing) of the cable 24 is inserted into the soot tube 12 installed at a predetermined position by a support insulator 25. The soot tube 12 is made of porcelain or polymer. In the soot tube 12, the cable conductor 7 from which the covering portion of the cable 24 is removed is compression-connected to the conductor lead bar 1. The soot pipe 12 is covered with an upper lid through the soot pipe upper packing 5, and the conductor lead bar 1 is drawn out into the atmosphere through the airtight seal packing 6 from the center, and is connected to the overhead wire or other equipment with lead wires. Connected. The hermetic seal packing 6 is fastened to the upper lid by the packing fastening metal fitting 4, and the conductor lead-out dedicated 1 is fixed by the conductor fixing lock nut 3 at the upper part of the tub tube 12, and these are covered by the rain cover 2.
[0006]
The electric field control of the air termination connection portion is controlled within the allowable electric field strength by inserting the plug-in unit rubber insulator 13 on the cable insulator 11 from which the cable outer shielding layer 21 in the soot tube 12 is removed. Is done. Further, a gas 9 layer is provided in the upper part of the soot pipe 12, and the pressure change due to the expansion and contraction due to the temperature of the insulating oil 10 below it is absorbed by this gas 9 layer and kept below the allowable internal pressure value of the soot pipe 12. It is like that. Further, the connection portion between the cable conductor 7 and the conductor lead bar 1 is covered with an upper conductor hermetic seal 8 for hermetically sealing them. In some cases, the insulating pipe 10 is entirely used as the insulating gas without using the insulating oil 10.
[0007]
An oil stop or gas stop process is applied to the lower part of the soot pipe 12 so that the insulating oil 10 or the gas 9 in the soot pipe 12 does not leak to the lower cable side. As shown in FIGS. 4 and 5 (enlarged view of portion A in FIG. 4), the general structure is that a cylindrical oil (or gas) fastener 15 (hereinafter referred to as “oil fastener”) is a cable. Inserted into the outer shielding layer 21, the upper and lower portions of the metal fitting 15 are sealed by tape processing or the like to form the oil metal fitting upper seal 14 and the oil metal fitting lower seal 20. Further, the gap between the oil stopper 15 and the mounting flange 18 is sealed with a packing 17 fixed to the mounting flange 18 by a packing fastening metal 16. The mounting flange 18 is connected to the soot tube 12 via a soot tube lower packing 19. Further, a protective metal fitting 22 is attached to the lower portion of the terminal connection portion to protect the cable outer shielding layer 21, and further, a lower seal 23 is provided to block the outside from the outside.
[0008]
In general, in the structure of the conventional oil clamp 15 shown in FIG. 5, the internal pressure is always used in the range of about 0 to 0.3 MPa. If the internal pressure exceeds this level, the oil stopper 15 may move in the vertical direction (vertical direction in the figure) due to the internal pressure. In this case, for example, as shown in FIG. 6, a stopper 15b is attached to the oil stopper 15a. It is necessary to provide it.
[0009]
[Problems to be solved by the invention]
In recent years, there has been an increasing demand for connecting directly from underground power transmission towers to underground power cables. At that time, the most cost-effective thing is to pull the cables up to the tower and connect the cable to the air terminal on the tower. This is a method in which a section is provided and directly connected from an overhead line by a jumper line. In this case, it is required to reduce the weight of the terminal connection part and to make it advantageous in designing the strength of the steel tower. In the case of installation on a steel tower, it is necessary to prevent explosions and explosions in the event of a ground fault because of its high altitude. Polymer rods are lighter than porcelain rods and have less cracking and scattering.
[0010]
However, even when a polymer is used as the soot pipe, in the case of a ground fault in the soot pipe 12, the pressure in the soot pipe 12 cannot be controlled, and there is a possibility of explosion explosion (solid debris and insulating oil scattering, ignition). was there. Further, the power cable terminal connection portion in Patent Document 1 has the same problem.
[0011]
Accordingly, an object of the present invention is to provide a power cable termination connection portion that can prevent explosion and scattering of a soot pipe and other members due to an increase in internal pressure during a ground fault.
[0012]
Further, in recent years, there is a demand for a simple structure that is lightweight and easy to install (attach and assemble) in a power cable terminal connection.
[0013]
Accordingly, another object of the present invention is to provide a simple pressure release structure with a small number of parts without using a complicated device or structure even for a high internal pressure generated during a ground fault.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the power cable termination connecting portion of the present invention includes a soot tube that inserts the end portion of the power cable, and insulating oil or insulating gas filled around the power cable in the soot tube. A leakage prevention fitting provided to be inserted through the power cable at a boundary between the power cable and the soot tube where the power cable is inserted into the soot tube, and preventing the insulating oil or the insulating gas from leaking to the outside of the soot tube; In the terminal cable connecting portion for power cable, a flange portion is provided on the leakage prevention metal fitting, and a gap between the flange portion and a mounting flange connected to the soot tube is sealed so that the power cable and the soot tube are connected. was hermetically sealed, and the lower side of the flange portion in the power cable side end portion outside of the porcelain bushing, through a pedestal attached to the lower side of the mounting flange Serial provided stoppers for preventing leakage fitting, the stopper is to porcelain tube internal pressure of less than 1MPa, to prevent the leakage prevention fitting is moved downward in the vertical direction, deformation and the porcelain bushing inner reaches above the internal pressure 1MPa The leakage prevention fitting is moved downward in the vertical direction to release the internal pressure of the soot tube into a protection fitting connected to the soot tube.
[0015]
It is desirable that the protrusion of the flange portion has a dimension of 10 mm or more.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a power cable termination connecting portion of the present invention will be described with reference to the drawings.
[0018]
The overall structure of the power cable termination connection portion according to the present embodiment is basically the same as that of the conventional power cable termination connection portion shown in FIG. The structure shown is different, and is configured as shown in FIG.
[0019]
In FIG. 1, a flange portion 28 a is provided at a location where the oil stopper 28 abuts against the packing 17, and the outer diameter of the oil stopper 28 at this portion is increased, so that from the side of the soot pipe (upper side in the figure). The inner pressure receiving area is formed to be large.
[0020]
For example, the outer diameter of the cable outer shielding layer 21 is d 1 , the outer diameter of the oil stopper 15 having no conventional flange portion shown in FIG. 5 is d 2 , and the oil stopper 28 of the present embodiment shown in FIG. When the outer diameter of the flange portion 28a is d 3 , specifically d 1 = 90 mm, d 2 = 100 mm, and d 3 = 130 mm, FIG. 1 (structure according to this embodiment) is compared with FIG. 5 (conventional structure). The pressure multiple P received by the flange surface by
P = (d 3 2 -d 1 2 ) / (d 2 2 -d 1 2 )
P = 4.63
Thus, the internal pressure receiving sensitivity can be increased by 4.33 times that of the conventional structure.
[0021]
The oil stopper 28 can be formed of a non-magnetic metal, and the dimension of the protrusion (d 3 -d 2 ) by the flange portion 28 a is preferably 10 mm or more from the viewpoint of the above-mentioned pressure sensitivity. More preferably, it is 10 to 50 mm in view of the outer diameter restriction of the terminal connection structure.
[0022]
Further, a stopper 27 is provided on the lower side of the mounting flange 18 via a pedestal 26. The stopper 27 is made of a non-magnetic metal or hard plastic. The stopper 27 does not deform under normal use conditions of the inner side of the tub tube, and functions effectively, and is strong enough to deform when a high internal pressure is generated due to a ground fault. Is designed. Moreover, it is desirable to provide the stopper 27 not only at one place as shown in the figure but also at a plurality of places, for example, four places.
[0023]
FIG. 2 shows a pressure release operation situation when a ground fault occurs and a high internal pressure is instantaneously generated (for example, 4 MPa). The oil stopper 28 receives a force in the M direction in the figure due to the internal pressure due to the ground fault, and bends the stopper 27 and moves downward. For this reason, insulating oil and gas on the side of the soot pipe are sprayed into the lower space as indicated by the broken arrow F, so that the pressure inside the soot pipe can be made less than the internal pressure breakdown strength of the soot pipe, preventing phenomena such as explosion scattering and ignition. it can.
[0024]
In the structure of this embodiment, since the pressure in the vertical tube during normal use is about 0 to 0.5 MPa, the strength of the stopper 27 is preferably about 1 MPa. When the internal pressure of the soot pipe becomes 1 MPa or more, the stopper 27 is deformed and the oil clamp 28 can be moved downward in the vertical direction. However, it is also possible to change the stopper deformation strength according to conditions such as the structure of the terminal connection portion and the ground fault current, and set conditions other than 1 MPa. Further, the internal pressure at the time of the ground fault test reached 4 MPa or more in the case of the terminal connection part for 154 kVXLPE cable, but it was confirmed by the test that the structure of this embodiment can completely prevent explosion and scattering.
[0025]
As described above, in the power cable termination connection portion of the present embodiment,
(A) By providing only the stopper 27 for the oil clamp 28, explosion and scattering of the soot pipe and other members due to an increase in internal pressure during a ground fault can be prevented with a simple structure.
(B) Although the oil stopper 28 functions as a seal metal fitting at normal internal pressure, it functions as a pressure relief metal fitting at the time of a ground fault, thus preventing an increase in the number of parts by combining multiple functions with one component. it can.
(C) Since the flange 28a is provided in the oil stopper 28 and the outer diameter is increased to increase the pressure receiving area, the oil stopper 28 can be easily moved downward in the vertical direction in accordance with the pressure change in the vertical pipe 12. Can do.
[0026]
In addition, the other embodiment of the termination | terminus connection part for electric power cables of this invention is shown in FIG. In this cable terminal connection portion, a flange portion 29a is provided below the oil clamp 29, and the oil clamp lower seal 20 shown in FIG. 1 is omitted. Also in this embodiment, the same effect can be obtained by the same operation as the cable terminal connection portion shown in FIG.
[0027]
【The invention's effect】
According to the power cable terminal connection portion of the present invention, the following effects can be obtained.
(1) Compared to the conventional structure, the only additional part is a stopper, and despite the extremely simple structure, explosion explosion due to high internal pressure during a ground fault can be prevented.
(2) For this reason, it becomes possible to safely install the cable terminal connection portion on the overhead power transmission line tower, and there is an invaluable merit in terms of cost. Further, in the case of installation on the ground as in the prior art, the safety is further improved, and it can be used in places where there is a concern about conventional installation such as near a house.
(3) Although it can be used for all types of soot pipes, it is particularly suitable for installation on a steel tower of a polymer soot pipe type cable terminal connection portion, and further, its advantages can be utilized.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing an embodiment of a power cable termination connecting portion of the present invention.
FIG. 2 is a partial cross-sectional view showing a pressure release operation situation at the time of a ground fault in one embodiment of the power cable terminal connection portion of the present invention.
FIG. 3 is a partial cross-sectional view showing another embodiment of the power cable terminal connection portion of the present invention.
FIG. 4 is a cross-sectional view showing a conventional power cable termination connection.
5 is an enlarged cross-sectional view of a portion A indicated by a broken line in FIG.
FIG. 6 is an enlarged cross-sectional view showing another example of a portion A of a conventional power cable terminal connection portion.
[Explanation of symbols]
7 Cable conductor 9 Gas 10 Insulating oil 11 Cable insulator 12 碍 pipe 15 Oil clamp (leakage prevention bracket)
17 Packing 18 Mounting flange 21 Cable outer shielding layer 24 Cable 27 Stopper 28 Oil clamp (leakage prevention bracket)
28a Flange 29 Oil stopper (Leakage prevention bracket)
29a Flange

Claims (2)

電力ケーブルと、当該電力ケーブルの終端部を内挿する碍管と、当該碍管内の前記電力ケーブルの周囲に満たされた絶縁油または絶縁ガスと、前記電力ケーブルが前記碍管へ内挿される電力ケーブル/碍管境界部分において前記電力ケーブルに挿通して設けられ、前記絶縁油または絶縁ガスが前記碍管の外部に漏洩することを防止する漏洩防止金具と、を有する電力ケーブル用終端接続部において、前記漏洩防止金具にフランジ部を設けられ、該フランジ部と前記碍管に接続された取付フランジとの間がシールされて、前記電力ケーブルと前記碍管とを気密にシールし、かつ前記碍管の前記電力ケーブル側端部外側で前記フランジ部の下側で、前記取付フランジの下側に取付けた台座を介して前記漏洩防止金具用ストッパを設け、該ストッパは1MPa未満の碍管内圧までは、前記漏洩防止金具が鉛直方向下方に移動することを防止し、前記碍管内部が1MPa以上の内圧に達すると変形して前記漏洩防止金具を鉛直方向下方に移動させ、前記碍管の内圧を碍管に接続した保護金具内に解放することを特徴とする電力ケーブル用終端接続部。A power cable, a soot tube that inserts a terminal portion of the power cable, an insulating oil or an insulating gas filled around the power cable in the soot tube, and a power cable / in which the power cable is inserted into the soot tube In the terminal connection part for a power cable, the leakage preventing metal fitting is provided to be inserted through the power cable at a soot boundary portion and prevents the insulating oil or the insulating gas from leaking outside the soot pipe. A flange portion is provided on the metal fitting, and a gap between the flange portion and a mounting flange connected to the soot tube is sealed, and the power cable and the soot tube are hermetically sealed, and the power cable side end of the soot tube in lower side of the flange portion at outer side, a stopper for the leakage prevention fitting provided through the pedestal attached to the lower side of the mounting flange, said stopper Prevents the leak-proof fitting from moving downward in the vertical direction up to an internal pressure of less than 1 MPa, and deforms when the internal pressure of the pipe reaches an internal pressure of 1 MPa or more and moves the leak-proof fitting in the vertical direction downward. The power cable terminal connection part is characterized in that the internal pressure of the soot pipe is released into a protective metal fitting connected to the soot pipe. 前記フランジ部の突起が10mm以上の寸法であることを特徴とする請求項1記載の電力ケーブル用終端接続部。  The end connection portion for a power cable according to claim 1, wherein the projection of the flange portion has a dimension of 10 mm or more.
JP2003165502A 2003-06-10 2003-06-10 Power cable termination connection Expired - Lifetime JP4260553B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003165502A JP4260553B2 (en) 2003-06-10 2003-06-10 Power cable termination connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003165502A JP4260553B2 (en) 2003-06-10 2003-06-10 Power cable termination connection

Publications (2)

Publication Number Publication Date
JP2005006379A JP2005006379A (en) 2005-01-06
JP4260553B2 true JP4260553B2 (en) 2009-04-30

Family

ID=34091963

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003165502A Expired - Lifetime JP4260553B2 (en) 2003-06-10 2003-06-10 Power cable termination connection

Country Status (1)

Country Link
JP (1) JP4260553B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100503399C (en) * 2004-04-01 2009-06-24 索尼化学&信息部件株式会社 Suction device and stacked sheet carrying method

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4484752B2 (en) * 2005-04-22 2010-06-16 シャープ株式会社 refrigerator
KR101464474B1 (en) * 2012-09-04 2014-11-24 일진전기 주식회사 weatherproof and termination for voltage power cable including the same
KR102258894B1 (en) * 2014-08-19 2021-06-01 엘에스전선 주식회사 Joint for mass impregnated cable
DE112018003541T5 (en) 2017-07-13 2020-05-20 Sumitomo Electric Industries, Ltd. NON-OHMSE COMPOSITION AND METHOD FOR PRODUCING THE SAME, CABLE CONNECTION UNIT AND CABLE TERMINAL UNIT
JP6907839B2 (en) * 2017-09-08 2021-07-21 住友電気工業株式会社 Cable termination connection structure
JP2020182270A (en) * 2019-04-23 2020-11-05 住友電気工業株式会社 Terminal connection structure of power cable
WO2023068240A1 (en) * 2021-10-21 2023-04-27 住友電気工業株式会社 Cable terminal connection structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100503399C (en) * 2004-04-01 2009-06-24 索尼化学&信息部件株式会社 Suction device and stacked sheet carrying method

Also Published As

Publication number Publication date
JP2005006379A (en) 2005-01-06

Similar Documents

Publication Publication Date Title
CN102356528B (en) Covered cable assemblies and methods and systems for forming the same
US8545244B2 (en) Connection system and method for subsea cables in severe environments
US8134071B2 (en) Apparatus for a connection point between two electrical high-voltage cables
JP4260553B2 (en) Power cable termination connection
KR20100071059A (en) Pressure restraining enclosure for cables
KR20100064372A (en) A metal fitting integration type stress-relief cone and a cable sealing end using the same
US6265663B1 (en) Terminal for an electric cable
WO2016190824A1 (en) Heavy-duty and water-proof link boxes for cross bonding of extra high voltage cable systems
KR101408050B1 (en) Fixing Flange Assembly of Submarine Power Cable for Transmission-Distribution and Method of Installing thereof
JP4751918B2 (en) Air termination connection and assembly method of air termination connection
JP2005117806A (en) Polymer bushing and cable end connections using same
JP6616430B2 (en) Rigid joint assembly
JP2005117806A5 (en)
CN206678916U (en) Seal mounting assembly
JP6316335B2 (en) Gas insulated surge arrester
CN210780046U (en) 35kV combined type cable termination
US3243499A (en) Cable termination system with girdle shield
CN103715640B (en) The installation method of the water-proof jacket of cable intermediate joint
KR200212353Y1 (en) Gas Insulated Cable Head
JPH039209Y2 (en)
KR200453986Y1 (en) Arrester in an elbow type
TW202329572A (en) Terminal connection part for power cable
JP3036827B2 (en) Cable termination box
JP6169118B2 (en) Power cable air termination connection
JP2005222828A (en) Bushing, cable terminal connection part using the bushing, and penetration bushing

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050727

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20071023

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20071120

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080111

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080729

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080821

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090203

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090204

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120220

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4260553

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150220

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term