KR100656266B1 - Safety device for active branch off link of transformer for distribution line - Google Patents

Safety device for active branch off link of transformer for distribution line Download PDF

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Publication number
KR100656266B1
KR100656266B1 KR1020060089385A KR20060089385A KR100656266B1 KR 100656266 B1 KR100656266 B1 KR 100656266B1 KR 1020060089385 A KR1020060089385 A KR 1020060089385A KR 20060089385 A KR20060089385 A KR 20060089385A KR 100656266 B1 KR100656266 B1 KR 100656266B1
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South Korea
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cover
divergence
active
link
ring
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KR1020060089385A
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Korean (ko)
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박기영
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주식회사 세종전력기술단
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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
    • H02G15/08—Cable junctions
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/192—Cable junctions protected by sleeves, e.g. for communication cable with support means for ends of the sleeves
    • 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
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

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  • Suspension Of Electric Lines Or Cables (AREA)

Abstract

A safety device for an active branch off link of a transformer for a distribution line is provided to prevent a high voltage short in advance by preventing an inflow of rainwater or an outer impact. A divergence slave cover(40) is electrically connected to an active divergence link which has a ring shape and a conductive body. The divergence slave cover(40) seals a main wire by wrapping a main wire along a front/rear side of the active divergence link. A cover pipe body(10) wraps the divergence slave cover(40) and is a couple of semicircle cylindrical bodies. A plurality of rubber insulation cushion pads is arranged on an inner side plane. An insertion groove is formed on an upper side line cross section plane so that a width is extended along the inside. An active divergence link is formed to be protruded downwardly on a lower side line cross section plane. An insertion unit is inserted into the lower part line cross section plane. A connection groove is formed on an outer circumference plane of the lower side line cross section plane. An extension connecting unit inserted into a right/left connection groove of the cover pipe body(10) is formed on a left/right side of a safety cover(20). A connection fixing member(30) has a couple of extension connecting units for extending an area along both sides. The connection fixing member(30) is inserted into the upper part line cross section plane insertion groove of the cover pipe body(10).

Description

배전용 주상변압기 활성분기 고리용 안전장치{Safety Device for Active Branch Off Link of Transformer for Distribution Line}Safety Device for Active Branch Off Link of Transformer for Distribution Line

도 1은 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 시공모습을 보인 사시도, Figure 1 is a perspective view showing the construction of the safety device for the columnar transformer active branch ring for power distribution according to the embodiment of the present invention,

도 2는 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 체결장치를 보인 분리사시도, Figure 2 is an exploded perspective view showing a fastening device of the safety device for the main branch transformer active branch ring for power distribution according to the embodiment of the present invention,

도 3은 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 시공모습을 보인 측단면도, Figure 3 is a side cross-sectional view showing the construction of the safety device for the columnar transformer active branch ring for power distribution according to the embodiment of the present invention,

도 4는 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 시공모습을 보인 사용상태 정면도.Figure 4 is a front view showing the use state of the construction of the safety device for the columnar transformer active branch ring for power distribution according to the embodiment of the present invention.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 : 커버관체 11 : 고무재 절연쿠션패드10: cover body 11: rubber insulation cushion pad

12 : 끼움장홈 13 : 삽입요부12: fitting groove 13: insertion recess

14 : 삽입돌부 15 : 고리요부14: insertion protrusion 15: ring recess

16 : 체결장홈 20 : 자바라식 안전커버16: fastening groove 20: bellows safety cover

21 : 확장체결돌부 30 : 연결고정부재21: expansion fastening portion 30: connection fixing member

31 : 확장체결부 40 : 분기슬라브커버31: expansion connection part 40: branch slab cover

50 : 활성분기고리 60 : 주선50: active branch ring 60: arrangement

70 : 접속구 71 : 인하선70: connector 71: cut-off line

80 : 전주80: Jeonju

본 발명은 배전용 주상변압기 활성분기 고리용 안전장치에 관한 것으로서, 보다 상세하게는 분기구의 전도체인 연결고리 전체를 감싸면서 외부충격이나 빗물의 유입을 방지하여 유동으로 인한 고압쇼트를 미연에 방지할 수 있는 배전용 주상변압기 활성분기 고리용 안전장치에 관한 것이다.The present invention relates to a safety device for an active branch ring of a distribution-type transformer, and more particularly, to prevent an external shock or rainwater inflow while covering the entire connection ring, which is a conductor of a branch, to prevent a high pressure short circuit due to flow. The present invention relates to a safety device for an active branch ring of a distribution-type column transformer.

전력 생산지로부터 배전선로를 거쳐 각 수용가로 전력이 공급되는 동안 배전선로는 일정한 간격의 단위구간을 연속으로 형성하고, 이들 단위구간 내의 전력선을 서로 접속 및 분기하여 이루어지는 것이며, 일정한 길이의 전력선은 별도의 접속구에 의해 연결되고 상기한 전력선으로부터 각 수용가로 제공되는 전력은 별도의 분기구에 의해 분기 공급되는 것이다.The power distribution line is formed by continuously forming unit sections at regular intervals and connecting and branching power lines within each unit section while power is supplied from the power generation area to the distribution line through each distribution line. The electric power connected by the connection port and provided to each customer from the above power line is branched by a separate branch port.

상기 분기구는 전선이나 콘넥터 등이 직접 연결되는 부분인 전도체인 고리형상의 활성분기고리가 형성되고, 분기구는 외주면에 고무와 같은 비전도성 몸체에 의해 몰딩되어 있다.The branch is formed of an annular active branch ring, which is a conductor that is a portion to which a wire or a connector is directly connected, and the branch is molded by a non-conductive body such as rubber on the outer circumferential surface thereof.

그러나, 상기한 바와 같은 분기구는 외부로 드러내게 방치되어 몰딩몸체의 내부에 삽입되어 있는 연결구 내부에서 외부충격에 의한 유동시 고압쇼트에 의한 손상이 발생하는 문제점이 있었고, 그런 경우 그 분기구 전체를 교체하여야 하므로 선로복구 시간이 상당히 오래 소요되는 문제점이 있었다.However, the branching holes as described above were left exposed to the outside, and there was a problem that damage caused by high-pressure shorts occurred during flow due to external impact in the connector inserted into the molding body. There was a problem that it takes a long time to recover the track because it must be replaced.

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 분기구의 전도체인 연결고리 전체를 감싸면서 외부충격이나 빗물의 유입을 방지하여 유동으로 인한 고압쇼트를 미연에 방지할 수 있는 배전용 주상변압기 활성분기 고리용 안전장치를 제공함에 그 목적이 있다.The present invention is to solve the problems as described above, the distribution of the columnar transformer that can prevent the high-pressure short-circuit due to the flow by preventing the external impact or the inflow of rain while covering the entire connection ring of the branching conductor The purpose is to provide a safety device for branch rings.

이와 같은 목적을 달성하기 위하여, 본 발명은 전력선인 주선의 피복을 벗기고 전도체이고 고리형상인 활성분기고리가 일체로 접속통전되어 고정된 상태에서 활성분기고리 전후방측으로 주선을 감싸 밀폐시키는 원통형상의 부도체인 분기슬라브커버와;In order to achieve the above object, the present invention is a cylindrical insulator that seals the main line in front and rear of the active branch ring in a state in which the active branch ring of the conductor and the ring is connected and energized integrally by removing the coating of the main line as the power line. Branch slab cover;

상기 분기슬라브커버를 감싸는 한 쌍의 반원통체로 내측면에는 다수개의 고무재 절연쿠션패드가 고정배열되어 반원형상으로 돌출되게 형성되고, 상측선단면에는 내측으로 갈수록 넓이가 확장되는 끼움장홈이 길게 형성되며, 하측선단면 중심측에는 활성분기고리가 하부로 돌출되는 고리요부가 형성되고, 하측선단면에는 삽입돌부가 억지끼움되는 삽입요부가 형성되며, 하측선단면측의 외주연에는 내측으로 갈수록 넓이가 확장되는 체결장홈이 길게 형성되는 커버관체와; A pair of semi-cylindrical bodies surrounding the branch slab cover are formed in a plurality of rubber insulating cushion pads fixedly arranged on the inner side to protrude in a semi-circular shape, the upper side end is formed with a long fitting groove that extends in width toward the inside On the central side of the lower end face, an annular recess for protruding the active branch ring is formed on the bottom side, and an insertion recess on which the insertion protrusion is inserted is formed on the lower end face. A cover pipe body in which the fastening groove grooves are extended;

자바라형상의 사각관체로 상단 좌우측에는 상기 커버관체의 좌우측 체결장홈에 각각 삽입고정되는 확장체결돌부가 형성된 자바라식 안전커버와;A bellows type safety cover having a bellows-shaped rectangular tube formed at an upper and left sides of the bellows-shaped square tube and having expansion fastening protrusions respectively fixed to the left and right fastening grooves of the cover tube;

양측으로 갈수록 넓이가 확장되는 한 쌍의 확장체결부를 갖고 상기 커버관체의 상측선단면 끼움장홈에 좌우측이 각각 삽입고정되어 체결시키는 연결고정부재를 구비하는 특징이 있다.It has a pair of expansion fastening portion extending in width toward both sides is characterized in that it has a connection fixing member for fastening the left and right sides are respectively fastened to the upper end end fitting groove of the cover tube body.

이하, 본 발명을 첨부된 도면에 의해 보다 상세하게 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

도 1은 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 시공모습을 보인 사시도이고, 도 2는 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 체결장치를 보인 분리사시도이며, 도 3은 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 시공모습을 보인 측단면도이고, 도 4는 본 발명 실시 예인 배전용 주상변압기 활성분기 고리용 안전장치의 시공모습을 보인 사용상태 정면도이다.Figure 1 is a perspective view showing the construction of the safety device for the main ring transformer active branch ring for power distribution according to the embodiment of the present invention, Figure 2 is an exploded perspective view showing a fastening device of the safety device for the main ring transformer for branch distribution in the power distribution according to an embodiment of the present invention. Figure 3 is a side cross-sectional view showing the construction of the safety device for the main ring transformer active branch for power distribution according to the embodiment of the present invention, Figure 4 is a use of the construction of the safety device for the main ring transformer for branch distribution to the embodiment of the present invention use It is a state front view.

참고로 본 고안을 설명함에 있어 관련된 공지 기능 또는 구성에 대한 구체적인 설명이 본 고안의 요지를 불필요하게 흐릴 수 있다고 판단될 경우에는 그 상세한 설명을 생략하였다. For reference, in describing the present invention, when it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof is omitted.

또한, 후술되는 용어들은 본 고안에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운영자의 의도 또는 관례 등에 따라 달라질 수 있다.In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or an operator.

그러므로, 그 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것임은 물론이다.Therefore, the definition should be made based on the contents throughout the specification.

본 발명의 배전용 주상변압기 활성분기 고리용 안전장치는, 주선(60)을 감싸는 분기슬라브커버(40)와, 분기슬라브커버(40)를 감싸는 커버관체(10,10a)와, 커버관체(10,10a)의 하부를 체결시키고 활성분리고리(50)를 감싸는 자바라식 안전커 버(20)와, 커버관체(10,10a)의 상부를 체결고정시키는 연결고정부재(30)로 구성된다. The safety device for the columnar transformer active branch ring for power distribution of the present invention includes a branch slab cover 40 surrounding the main line 60, a cover tube 10 and 10a surrounding the branch slab cover 40, and a cover tube 10. It consists of a bellows type safety cover 20 for fastening the bottom of the, 10a and wraps the active separation ring 50, and the connection fixing member 30 for fastening the top of the cover pipe (10, 10a).

상기 분기슬라브커버(40)는 원통형상의 부도체로, 전력선인 주선(60)의 피복을 벗기고, 전도체이면서 고리형상인 활성분기고리(50)가 일체로 접속통전되어 고정된 상태에서 활성분기고리(50) 전후방측으로 주선(60)을 감싸 밀폐시킨다. The branch slab cover 40 is a cylindrical non-conductor, and strips the coating of the main line 60, which is a power line, and an active branch ring 50 in a state in which the active branch ring 50, which is a conductor and a ring, is integrally connected and energized. ) Close and enclose the main line 60 in the front and rear sides.

상기 커버관체(10,10a)는 상기 분기슬라브커버(40)를 감싸는 한 쌍의 반원통체로, 내측면에는 다수개의 고무재 절연쿠션패드(11)가 고정배열되어 반원형상으로 돌출되게 형성되고, 상측 선단면에는 내측으로 갈수록 넓이가 확장되는 끼움장홈(12)이 길게 형성되며, 하측선단면 중심측에는 활성분기고리(50)가 하부로 돌출되는 고리요부(15)가 형성되고, 하측선단면에는 삽입돌부(14)가 억지끼움되는 삽입요부(13)가 형성되며, 하측선단면측의 외주연에는 내측으로 갈수록 넓이가 확장되는 체결장홈(16)이 길게 형성된다.  The cover tube (10, 10a) is a pair of semi-cylindrical body surrounding the branch slab cover 40, the inner surface is formed with a plurality of rubber insulating cushion pad 11 is fixedly arranged to protrude in a semi-circular shape, The upper end face is formed with a longer fitting groove 12 extending in width toward the inner side, the lower end face center side is formed with a ring recess (15) protruding the active branch ring 50 to the bottom, the lower end face An insertion recess 13 to which the insertion protrusion 14 is inserted is formed, and a fastening groove 16 is formed on the outer circumferential side of the lower end face side, the width of which extends toward the inside.

상기 자바라식 안전커버(20)는 자바라형상의 사각관체로, 상단 좌우측에는 상기 커버관체(10,10a)의 하부 좌우측 체결장홈(16)에 각각 삽입고정되는 확장체결돌부(21)가 형성된다. The bellows type safety cover 20 is a bellows-shaped rectangular tubular body, and an extended fastening protrusion 21 is inserted into and fixed to the lower left and right fastening grooves 16 of the cover pipe bodies 10 and 10a, respectively.

상기 연결고정부재(30)는 양측으로 갈수록 넓이가 확장되는 한 쌍의 확장체결부(31)를 갖고 상기 커버관체(10,10a)의 상측선단면 끼움장홈(12)에 좌우측이 각각 삽입되어 체결고정시킨다. The connection fixing member 30 has a pair of expansion fastening portions 31, the width of which extends toward both sides, and the left and right sides are respectively inserted into the upper end end fitting grooves 12 of the cover pipe bodies 10 and 10a. Fix it.

이와 같은 본 발명은, 도 3 및 도 4와 같이, 먼저, 커버관체(10,10a) 하단의 체결장홈(16)에 자바라식 안전커버(20)를 삽입체결고정시킨 다음, 중심측으로 이동 시켜 활성분기고리(50)를 감싸게 한다. As described above, the present invention, as shown in Figures 3 and 4, first insert fastening the bellows type safety cover 20 into the fastening groove groove 16 of the lower end of the cover tube (10, 10a), and then moved to the center side to activate To wrap the branch ring (50).

이 상태에서, 커버관체(10,10a)의 상단은 연결고정부재(30)를 끼움장홈(12)에 삽입하여 체결고정시키면 된다.In this state, the upper end of the cover pipe (10, 10a) may be fixed by inserting the connection fixing member 30 into the fitting groove 12.

이렇게 주선(60)과 활성분기고리(50)를 분기슬라브커버(40) 및 커버관체(10,10a)와 자바라식 안전커버(20)로 감싼 상태로 유지하다가, 주선(60)을 분기시키려면, 인하선(71) 선단의 접속구(72)를 활성분기고리(50)에 접속고정시킨 다음 인하선의 타단을 전주(80)의 주상변압기(70)에 연결접속시키면 된다.Thus, while maintaining the main line 60 and the active branch ring 50 wrapped in the branch slab cover 40 and the cover body (10, 10a) and bellows type safety cover 20, to branch the main line (60) The connection port 72 at the end of the lower line 71 is fixed to the active branch ring 50, and then the other end of the lower line is connected to the columnar transformer 70 of the pole 80.

주선(60)과 통전되는 활성분기고리(50)를 감싸는 자바라식 안전커버(20)는 커버관체(10,10a) 하단의 체결장홈(16)에 고정되어 상부와 좌우측으로부터 가해지는 외부충격으로부터 활성분기고리(50)를 보호하게 된다.The bellows type safety cover 20 surrounding the active branch ring 50 that is energized with the main line 60 is fixed to the fastening groove 16 at the bottom of the cover pipe 10 and 10a to be active from external shocks applied from the top and left and right sides. The branch ring 50 will be protected.

이와 같이, 본 발명은 분기구의 전도체인 연결고리 전체를 감싸면서 외부충격이나 빗물의 유입을 방지하여 유동으로 인한 고압쇼트를 미연에 방지할 수 있는 효과가 있다.As such, the present invention has the effect of preventing the high-pressure short-circuit due to the flow by preventing the external impact or the ingress of rain while covering the entire connecting ring which is a conductor of the branch.

본 발명은 상술한 특정의 바람직한 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (1)

전력선인 주선의 피복을 벗기고 전도체이고 고리형상인 활성분기고리가 일체로 접속통전되어 고정된 상태에서 활성분기고리 전후방측으로 주선을 감싸 밀폐시키는 원통형상의 부도체인 분기슬라브커버와;A branch slab cover which is a cylindrical insulator which seals the main line in front and rear sides of the active branch ring in a state in which a conductive and ring-shaped active branch ring is connected and energized integrally by removing the coating of the main line as a power line; 상기 분기슬라브커버를 감싸는 한 쌍의 반원통체로 내측면에는 다수개의 고무재 절연쿠션패드가 고정배열되어 반원형상으로 돌출되게 형성되고, 상측선단면에는 내측으로 갈수록 넓이가 확장되는 끼움장홈이 길게 형성되며, 하측선단면 중심측에는 활성분기고리가 하부로 돌출되는 고리요부가 형성되고, 하측선단면에는 삽입돌부가 억지끼움되는 삽입요부가 형성되며, 하측선단면측의 외주연에는 내측으로 갈수록 넓이가 확장되는 체결장홈이 길게 형성되는 커버관체와; A pair of semi-cylindrical bodies surrounding the branch slab cover are formed in a plurality of rubber insulating cushion pads fixedly arranged on the inner side to protrude in a semi-circular shape, the upper side end is formed with a long fitting groove that extends in width toward the inside On the central side of the lower end face, an annular recess for protruding the active branch ring is formed on the bottom side, and an insertion recess on which the insertion protrusion is inserted is formed on the lower end face. A cover pipe body in which the fastening groove grooves are extended; 자바라형상의 사각관체로 상단 좌우측에는 상기 커버관체의 좌우측 체결장홈에 각각 삽입고정되는 확장체결돌부가 형성된 자바라식 안전커버와;A bellows type safety cover having a bellows-shaped rectangular tube formed at an upper and left sides of the bellows-shaped square tube and having expansion fastening protrusions respectively fixed to the left and right fastening grooves of the cover tube; 양측으로 갈수록 넓이가 확장되는 한 쌍의 확장체결부를 갖고 상기 커버관체의 상측선단면 끼움장홈에 좌우측이 각각 삽입고정되어 체결시키는 연결고정부재를 구비하는 배전용 주상변압기 활성분기 고리용 안전장치.A safety device for a distribution transformer columnar transformer having a pair of expansion fastening portion extending toward both sides and having a connection fixing member for fastening the left and right sides are respectively fastened to the upper end end fitting groove of the cover tube.
KR1020060089385A 2006-09-15 2006-09-15 Safety device for active branch off link of transformer for distribution line KR100656266B1 (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100835577B1 (en) * 2008-03-21 2008-06-05 제일기술개발주식회사 Latch safety device for transformer live wire in pillar for supply of electric power
KR100860974B1 (en) 2008-06-23 2008-10-10 태한전기 주식회사 Safety device for link live diverging of transformer live wire in pillar
KR100989443B1 (en) 2010-07-16 2010-10-26 (주)혜광 Safety device for transformer live wire in electric pole for supply of electric power
KR101080971B1 (en) 2011-08-12 2011-11-09 (주)청운엔지니어링 Safety device for transformer live wire in electric pole for supply of electric power
KR101577595B1 (en) 2015-04-01 2015-12-15 김도현 A branch device for incoming multi-core opticl cable
CN106451229A (en) * 2016-07-26 2017-02-22 上海倍肯机电科技有限公司 Transmission lead equipment provided with mounting structure and mounting method
KR101864752B1 (en) * 2018-01-22 2018-06-07 주식회사 보문기술감리단 Connector of underground line for stable connecting
KR101864753B1 (en) * 2018-01-12 2018-06-07 주식회사 보문기술감리단 Surpport device for working the aerial line easily
KR102186683B1 (en) 2020-06-02 2020-12-04 주식회사 한국나이스이테크 Safety cover ball of active branch ring of main phase transformer for power distribution
KR20220005753A (en) * 2020-07-07 2022-01-14 한국전력공사 Insulation device for sleeve cover
KR102497015B1 (en) * 2022-04-21 2023-02-07 주식회사 희승이엔지 Safety cover device of live line branch ring of columnar transformer for distribution

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100835577B1 (en) * 2008-03-21 2008-06-05 제일기술개발주식회사 Latch safety device for transformer live wire in pillar for supply of electric power
KR100860974B1 (en) 2008-06-23 2008-10-10 태한전기 주식회사 Safety device for link live diverging of transformer live wire in pillar
KR100989443B1 (en) 2010-07-16 2010-10-26 (주)혜광 Safety device for transformer live wire in electric pole for supply of electric power
KR101080971B1 (en) 2011-08-12 2011-11-09 (주)청운엔지니어링 Safety device for transformer live wire in electric pole for supply of electric power
KR101577595B1 (en) 2015-04-01 2015-12-15 김도현 A branch device for incoming multi-core opticl cable
CN106451229B (en) * 2016-07-26 2018-01-26 上海倍肯机电科技有限公司 It is provided with the transmission pressure equipment and installation method of mounting structure
CN106451229A (en) * 2016-07-26 2017-02-22 上海倍肯机电科技有限公司 Transmission lead equipment provided with mounting structure and mounting method
KR101864753B1 (en) * 2018-01-12 2018-06-07 주식회사 보문기술감리단 Surpport device for working the aerial line easily
KR101864752B1 (en) * 2018-01-22 2018-06-07 주식회사 보문기술감리단 Connector of underground line for stable connecting
KR102186683B1 (en) 2020-06-02 2020-12-04 주식회사 한국나이스이테크 Safety cover ball of active branch ring of main phase transformer for power distribution
KR20220005753A (en) * 2020-07-07 2022-01-14 한국전력공사 Insulation device for sleeve cover
KR102422050B1 (en) * 2020-07-07 2022-07-21 한국전력공사 Insulation device for sleeve cover
KR102497015B1 (en) * 2022-04-21 2023-02-07 주식회사 희승이엔지 Safety cover device of live line branch ring of columnar transformer for distribution

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