KR100948456B1 - Outdoor Termination Filled Two Type of Oil with Different Viscosity - Google Patents

Outdoor Termination Filled Two Type of Oil with Different Viscosity Download PDF

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KR100948456B1
KR100948456B1 KR1020080006915A KR20080006915A KR100948456B1 KR 100948456 B1 KR100948456 B1 KR 100948456B1 KR 1020080006915 A KR1020080006915 A KR 1020080006915A KR 20080006915 A KR20080006915 A KR 20080006915A KR 100948456 B1 KR100948456 B1 KR 100948456B1
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South Korea
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insulating oil
filled
oil
high viscosity
cable
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KR1020080006915A
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Korean (ko)
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KR20090081055A (en
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안미경
전승익
손시호
김정년
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엘에스전선 주식회사
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
    • H02G15/22—Cable terminations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
    • H01B12/14—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by the disposition of thermal insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
    • H02G15/24—Cable junctions

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Abstract

본 발명은 고압케이블이 접속하는 종단접속함에 관한 것으로서, 종단접속함 내에 채워진 절연유에서 기포가 발생하거나 또는 절연유가 케이블 내부로 흘러들어가는 것을 방지할 수 있게 구성한 종단접속함을 제공하는 데 그 목적이 있다.The present invention relates to a terminal box to which a high voltage cable is connected, and an object of the present invention is to provide a terminal box configured to prevent bubbles from occurring in the insulating oil filled in the terminal box or flow of the insulating oil into the cable. .

상기와 같은 목적을 달성하기 위한 본 발명의 이종 절연유를 채운 종단접속함은 케이블도체의 둘레를 감싸는 절연층과, 상기 절연층과 간격을 두고 절연층의 둘레를 감싸는 자기재 애관을 포함하며, 상기 절연층과 자기재 애관의 사이 간격에서 아래쪽에는 상대적으로 점성이 높은 고점도 절연유가 채워지고, 상기 고점도 절연유 위에는 상대적으로 점성이 낮은 저점도 절연유가 채워지는 것을 기술적 특징으로 한다.The end junction box filled with the heterogeneous insulating oil of the present invention for achieving the above object includes an insulating layer surrounding the circumference of the cable conductor, and a magnetic material piper wrapping the circumference of the insulating layer at intervals from the insulating layer, In the gap between the insulating layer and the magnetic material pipe, a high viscosity insulating oil having a relatively high viscosity is filled in the lower portion, and a low viscosity insulating oil having a relatively low viscosity is filled in the high viscosity insulating oil.

종단접속함, 절연층, 고점도 절연유, 저점도 절연유, 애자기재 애관 Termination box, insulating layer, high viscosity insulating oil, low viscosity insulating oil, insulator

Description

이종 절연유를 채운 종단접속함{Outdoor Termination Filled Two Type of Oil with Different Viscosity}Outdoor Termination Filled Two Type of Oil with Different Viscosity}

본 발명은 고압케이블이 접속하는 종단접속함에 관한 것으로서, 특히 종단접속함 내에 채워진 절연유에서 기포가 발생하거나 또는 절연유가 케이블 내부로 흘러들어가는 것을 방지할 수 있게 구성한 것이다.The present invention relates to a terminal box to which a high voltage cable is connected, and in particular, is configured to prevent bubbles from being generated in the insulating oil filled in the terminal box or flow of the insulating oil into the cable.

종래의 고압케이블 종단접속함은 도 1에 도시된 바와 같이, 종단접속함(1)의 상부에 케이블도체(2)를 도체인출봉(3)과 압착하여 접속시킨 다음, 잠금너트(4)와 상부 금구(5) 및 상부 고정금구(6)를 접속하고, 외부를 감싸는 상부덮개(7)를 고정 접속하여 종단접속함의 상부를 구성한다.Conventional high-voltage cable termination box is, as shown in Figure 1, the cable conductor (2) is crimped and connected to the top of the termination box (1), the conductor drawing rod (3), and then the lock nut (4) The upper bracket 5 and the upper fixing bracket 6 are connected, and the upper cover 7 surrounding the outside is fixedly connected to form an upper portion of the termination box.

그리고 자기재 애관(8)을 외벽으로 하여 케이블 절연체(9)와 자기재 애관(8)의 사이에는 절연유(14)가 충전되고, 아래에는 스트레스콘(13)이 설치되어 전계를 완화시킬 수 있게 구성된다.In addition, the insulating material 14 is filled between the cable insulator 9 and the magnetic material pipe 8 with the magnetic material pipe 8 as the outer wall, and a stress cone 13 is installed below to relieve the electric field. It is composed.

상기와 같이 구성된 종단접속함(1)의 자기재 애관(8) 하부에 접속되는 하부취급 금구(10)와 가대(11)와의 사이에는 자폐층 간의 절연을 위하여 지지애자(12)가 볼트로 체결 고정된다.The support insulator 12 is fastened by a bolt between the lower handling bracket 10 connected to the lower portion of the magnetic material pipe 8 of the terminal junction box 1 configured as described above and the mount 11 to insulate the autism layer. It is fixed.

통상 절연유는 유압설비의 유무에 따라 저점도 절연유가 사용되거나 고점도 절연유가 사용되는데, 저점도 절연유는 유압설비에 의해 순환되지만, 고점도 절연유는 점도가 높아 순환되지 않는다. 따라서 고점도 절연유가 채워진 경우에는 유압설비가 필요치 않게 된다.In general, the insulating oil is a low viscosity insulating oil or a high viscosity insulating oil is used depending on the presence or absence of the hydraulic equipment, the low viscosity insulating oil is circulated by the hydraulic equipment, but the high viscosity insulating oil does not circulate due to the high viscosity. Therefore, hydraulic equipment is not required when high viscosity insulating oil is filled.

이와 같이 저점도 절연유를 사용하거나 고점도 절연유를 사용함에 있어 아래와 같은 문제점이 있다.Thus, when using a low viscosity insulating oil or using a high viscosity insulating oil has the following problems.

저점도 절연유를 사용할 경우에, 저점도 절연유가 아래 케이블 내부로 흘러 들어가게 되면서 케이블절연층과 자기재 애관 사이에 채워진 절연유의 양이 감소된다. In the case of using low viscosity insulating oil, the low viscosity insulating oil flows into the lower cable, thereby reducing the amount of insulating oil filled between the cable insulating layer and the magnetic material pipe.

반대로 고점도 절연유를 사용할 경우에, 고점도 절연유를 채우는 과정 중에 발생한 기포들이 진공 하에서도 높은 점성에 의해 상부로 부상하지 못하고 절연유 내부에 존재하게 된다.On the contrary, when the high viscosity insulating oil is used, bubbles generated during the filling process of the high viscosity insulating oil do not float to the top due to the high viscosity even under vacuum, but exist inside the insulating oil.

이와 같은 두 경우, 즉, 케이블절연층과 자기재 애관 사이에 채워진 절연유의 양이 감소하는 경우와 절연유 속에 기포가 존재하는 경우에, 절연이 파괴되면서 절연내력을 저하시킨다.In these two cases, that is, when the amount of the insulating oil filled between the cable insulating layer and the magnetic material pipe decreases, and when bubbles exist in the insulating oil, the insulation strength is lowered while the insulation is broken.

본 발명은 앞에서 설명한 바와 같은 종래의 기술의 문제점을 해결하기 위하여 발명된 것으로서, 절연유 양의 감소 및 기포 존재에 따른 절연내력의 저하를 방지할 수 있는 이종 절연유를 채운 종단접속함을 제공하는 데 그 목적이 있다.The present invention has been invented to solve the problems of the prior art as described above, to provide a termination box filled with heterogeneous insulating oil that can prevent the reduction of the amount of insulating oil and the decrease of the dielectric strength due to the presence of bubbles. There is a purpose.

상기와 같은 목적을 달성하기 위한 본 발명의 이종 절연유를 채운 종단접속함은 케이블도체의 둘레를 감싸는 절연층과, 상기 절연층과 간격을 두고 절연층의 둘레를 감싸는 자기재 애관을 포함하며, 상기 절연층과 자기재 애관의 사이 간격에서 아래쪽에는 상대적으로 점성이 높은 고점도 절연유가 채워지고, 상기 고점도 절연유 위에는 상대적으로 점성이 낮은 저점도 절연유가 채워지는 것을 기술적 특징으로 한다.The end junction box filled with the heterogeneous insulating oil of the present invention for achieving the above object includes an insulating layer surrounding the circumference of the cable conductor, and a magnetic material piper wrapping the circumference of the insulating layer at intervals from the insulating layer, In the gap between the insulating layer and the magnetic material pipe, a high viscosity insulating oil having a relatively high viscosity is filled in the lower portion, and a low viscosity insulating oil having a relatively low viscosity is filled in the high viscosity insulating oil.

또한, 본 발명의 바람직한 실시예에 따르면, 상기 고점도 절연유의 양은 상기 저점도 절연유의 양보다 상대적으로 작다.Further, according to a preferred embodiment of the present invention, the amount of the high viscosity insulating oil is relatively smaller than the amount of the low viscosity insulating oil.

앞서 설명한 바와 같이, 본 발명의 이종 절연유를 채운 종단접속함은 케이블절연층과 자기재 애관 사이에 채워진 절연유에 있어서 아래에는 고점도 절연유를 채우고, 그 위에 저점도 절연유를 채움으로써, 저점도 절연유에 포함된 기포를 용이하게 제거할 뿐만 아니라, 아래에 고점도 절연유가 채워짐으로써, 저점도 절연유가 아래로 흐르지 않게 차단하여 절연유 감소에 의한 절연내력 감소를 방지할 수 있다는 장점이 있다.As described above, the terminal box filled with the heterogeneous insulating oil of the present invention is included in the low viscosity insulating oil by filling the high viscosity insulating oil below and filling the low viscosity insulating oil therebetween in the insulating oil filled between the cable insulating layer and the magnetic material pipe. In addition to the easy removal of the bubbles, the high-viscosity insulating oil is filled below, there is an advantage that the low-viscosity insulating oil is prevented from flowing down to prevent the reduction of the dielectric strength by reducing the insulating oil.

아래에서는 본 발명에 따른 이종 절연유를 채운 종단접속함의 양호한 실시예를 첨부한 도면을 참조로 하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a termination box filled with heterogeneous insulating oil according to the present invention will be described in detail.

도면에서, 도 2는 본 발명의 한 실시예에 따른 이종 절연유를 채운 종단접속함의 개략도이다.2 is a schematic diagram of a termination box filled with heterogeneous insulating oil according to one embodiment of the present invention.

도 2에 도시된 바와 같이, 종단접속함(100)은 케이블도체(110)의 둘레를 감싸는 보강절연층(120)과, 상기 보강절연층(120)의 둘레를 감싸는 케이블절연층(130)과, 상기 케이블절연층(130)과 간격을 두고 케이블절연층(130)의 둘레를 감싸는 자기재 애관(140)을 포함하며, 종단접속함(100)의 양단에는 케이블(150)이 각각 금구에 의해 고정된다.As shown in FIG. 2, the termination box 100 includes a reinforcing insulation layer 120 surrounding the circumference of the cable conductor 110, and a cable insulation layer 130 surrounding the circumference of the reinforcement insulation layer 120. And, the cable insulating layer 130 and a space between the cable insulating layer 130 surrounding the cable insulation layer 130, and includes a magnetic pipe 140, and both ends of the terminal junction box 100, the cable 150 by each bracket It is fixed.

여기에서, 상기 케이블절연층(130)과 자기재 애관(140) 사이의 간격에는 2종의 절연유(160, 170)가 채워진다. 한 종의 절연유는 점성이 높은 고점도 절연유(160)이고, 다른 한 종의 절연유는 상대적으로 점성이 낮은 저점도 절연유(170)이다.Here, two types of insulating oils 160 and 170 are filled in the gap between the cable insulating layer 130 and the magnetic material pipe 140. One type of insulating oil is a high viscosity insulating oil 160 having high viscosity, and the other type of insulating oil is a low viscosity insulating oil 170 having a relatively low viscosity.

고점도 절연유(160)는 상기 간격의 아래쪽에 채워지는데, 상기 고점도 절연유(160)는 중력에 의해 흘러내리지 않을 정도의 점성을 갖는 절연유이다. 이와 같은 고점도 절연유(160)를 상기 케이블절연층(130)과 자기재 애관(140) 사이의 간격 아래쪽에 채우고, 그 위에 저점도 절연유(170)를 채운다. 그러면 아래 채워진 고점 도 절연유(160)에 의해 위에 채워진 저점도 절연유(170)는 아래로 흘러내리지 않게 된다.The high viscosity insulating oil 160 is filled in the lower portion of the gap, the high viscosity insulating oil 160 is an insulating oil having a viscosity that does not flow down by gravity. The high viscosity insulating oil 160 is filled below the gap between the cable insulating layer 130 and the magnetic material pipe 140, and the low viscosity insulating oil 170 is filled thereon. Then, the low viscosity insulating oil 170 filled above by the high viscosity insulating oil 160 filled below does not flow down.

그리고 2종의 절연유(160, 170)가 상기 간격에 채워짐에 있어서, 고점도 절연유(160)의 양보다 저점도 절연유(170)의 양이 상대적으로 많다. 이와 같이 간격에 채워진 저점도 절연유(170)가 상대적으로 많음으로써, 저점도 절연유(170)를 채운 상태에서 진공 상태를 유지하면 저점도 절연유(170)에 포함된 기포가 제거된다.When the two kinds of insulating oils 160 and 170 are filled in the gap, the amount of the low viscosity insulating oil 170 is relatively higher than that of the high viscosity insulating oil 160. Thus, the relatively low viscosity insulating oil 170 is filled in the gap, by maintaining the vacuum in the state filled with the low viscosity insulating oil 170, bubbles contained in the low viscosity insulating oil 170 is removed.

이와 같이 저점도 절연유(170)에 포함된 기포는 제거될 수 있으나, 고점도 절연유(160)에 포함된 기포는 좀처럼 제거되지 않는다. 하지만, 고점도 절연유(160)의 양은 저점도 절연유(170)의 양보다 상대적으로 작아 종래 기술에서와 같이 고점도 절연유만으로 채워진 종단접속함(100) 보다 내재된 기포의 양은 훨씬 작다.As such, bubbles included in the low viscosity insulating oil 170 may be removed, but bubbles contained in the high viscosity insulating oil 160 are hardly removed. However, the amount of the high viscosity insulating oil 160 is relatively smaller than the amount of the low viscosity insulating oil 170, the amount of bubbles inherent than the termination box 100 filled with only high viscosity insulating oil as in the prior art is much smaller.

도 1은 종래 기술에 따른 고압케이블 종단접속함을 나타낸 개략도이고, 1 is a schematic diagram showing a high-voltage cable termination box according to the prior art,

도 2는 본 발명의 한 실시예에 따른 이종 절연유를 채운 종단접속함의 개략도이다.2 is a schematic diagram of a termination box filled with heterogeneous insulating oil according to an embodiment of the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

100 : 종단접속함 110 : 케이블도체100: end junction box 110: cable conductor

120 : 보강절연층 130 : 케이블절연층120: reinforced insulation layer 130: cable insulation layer

140 : 자기재 애관 150 : 케이블140: magnetic material love 150: cable

160 : 고점도 절연유 170 : 저점도 절연유160: high viscosity insulating oil 170: low viscosity insulating oil

Claims (2)

케이블도체(110)의 둘레를 감싸는 절연층(120, 130)과, 상기 절연층과 간격을 두고 절연층의 둘레를 감싸는 자기재 애관(140)을 포함하며,Insulating layers 120 and 130 surrounding the circumference of the cable conductor 110, and magnetic material pipe 140 surrounding the circumference of the insulating layer at intervals from the insulating layer, 상기 절연층과 자기재 애관의 사이 간격에서 아래쪽에 고점도 절연유(160)가 채워지고, 고점도 절연유 위에는 고점도 절연유 보다 점성이 낮은 저점도 절연유(170)가 채워지는 것을 특징으로 하는 이종 절연유를 채운 종단접속함.Termination connection filled with heterogeneous insulating oil, characterized in that the high-viscosity insulating oil 160 is filled below the gap between the insulating layer and the magnetic material pipe, and the low-viscosity insulating oil 170 is less viscous than the high viscosity insulating oil is filled on the high viscosity insulating oil. box. 제1항에 있어서,The method of claim 1, 상기 고점도 절연유의 양은 상기 저점도 절연유의 양보다 작은 것을 특징으로 하는 이종 절연유를 채운 종단접속함.And the amount of the high viscosity insulating oil is less than the amount of the low viscosity insulating oil.
KR1020080006915A 2008-01-23 2008-01-23 Outdoor Termination Filled Two Type of Oil with Different Viscosity KR100948456B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH052539U (en) * 1991-06-21 1993-01-14 三菱電線工業株式会社 Seal structure for power cable termination connection
KR20000018751A (en) * 1998-09-04 2000-04-06 권문구 Forbidding tool, which is provided interior, oil thrower corn having large number of holes for cable ending part connection
KR20030046196A (en) * 2001-12-05 2003-06-12 엘지전선 주식회사 Outdoor terminal for high voltage power cable
JP2005354797A (en) 2004-06-10 2005-12-22 Japan Petroleum Exploration Co Ltd Structure of cable connection head

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH052539U (en) * 1991-06-21 1993-01-14 三菱電線工業株式会社 Seal structure for power cable termination connection
KR20000018751A (en) * 1998-09-04 2000-04-06 권문구 Forbidding tool, which is provided interior, oil thrower corn having large number of holes for cable ending part connection
KR20030046196A (en) * 2001-12-05 2003-06-12 엘지전선 주식회사 Outdoor terminal for high voltage power cable
JP2005354797A (en) 2004-06-10 2005-12-22 Japan Petroleum Exploration Co Ltd Structure of cable connection head

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