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KR20210023489A - Grounding apparatus for high voltage cable of underground distribution transformer - Google Patents

Grounding apparatus for high voltage cable of underground distribution transformer Download PDF

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KR20210023489A
KR20210023489A KR1020190103744A KR20190103744A KR20210023489A KR 20210023489 A KR20210023489 A KR 20210023489A KR 1020190103744 A KR1020190103744 A KR 1020190103744A KR 20190103744 A KR20190103744 A KR 20190103744A KR 20210023489 A KR20210023489 A KR 20210023489A
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voltage cable
distribution transformer
elbow connector
cable
grounding
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KR1020190103744A
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KR102708725B1 (en
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최재용
동은주
이규찬
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한국전력공사
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Priority to KR1020190103744A priority Critical patent/KR102708725B1/en
Publication of KR20210023489A publication Critical patent/KR20210023489A/en
Priority to KR1020240123497A priority patent/KR102722984B1/en
Priority to KR1020240123378A priority patent/KR20240140031A/en
Priority to KR1020240123939A priority patent/KR102723337B1/en
Priority to KR1020240124061A priority patent/KR20240138057A/en
Priority to KR1020240124965A priority patent/KR20240141154A/en
Priority to KR1020240124779A priority patent/KR20240141153A/en
Priority to KR1020240125819A priority patent/KR20240144019A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
    • 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
    • H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
    • H02G13/40—Connection to earth

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Electric Cable Installation (AREA)

Abstract

본 발명은 지중 배전 변압기의 고압 케이블용 접지기구에 관한 것으로, 바디의 내부에 엘보접속재의 아크봉과 접속되는 접속단자가 구비되고, 접속단자에 케이블이 연결되며, 케이블에 접지선 연결수단 또는 대지 접지수단이 구비된다.
고압 케이블의 엘보접속재에 바디를 삽입 결합하는 것으로 간단히 지중 배전 선로의 접지를 실시할 수 있으며, 접지가 확실하게 이루어져 부품 소손 및 감전사고를 예방할 수 있다.The present invention relates to a grounding mechanism for a high-voltage cable of an underground distribution transformer, wherein a connection terminal connected to an arc rod of an elbow connector is provided inside a body, a cable is connected to the connection terminal, and a ground line connection means or ground grounding means to the cable It is equipped with.
By inserting and connecting the body to the elbow connector of the high-voltage cable, it is possible to ground the underground distribution line simply, and since the grounding is secure, it is possible to prevent component damage and electric shock.

Description

지중 배전 변압기의 고압 케이블용 접지기구{Grounding apparatus for high voltage cable of underground distribution transformer}Grounding apparatus for high voltage cable of underground distribution transformer

본 발명은 지중 배전 변압기의 고압 케이블용 접지기구에 관한 것으로, 보다 상세하게는 지중 배전 변압기의 고압측 케이블에 접속하여 배전 선로를 접지시킬 수 있도록 된 지중 배전 변압기의 고압 케이블용 접지기구에 관한 것이다.The present invention relates to a grounding mechanism for a high-voltage cable of an underground distribution transformer, and more particularly, to a grounding mechanism for a high-voltage cable of an underground distribution transformer capable of grounding a distribution line by connecting to a high-voltage side cable of an underground distribution transformer. .

통상 우리나라의 경우 수력, 화력, 원자력 등의 발전소에서 생산된 전류는 약 1 ~ 5만 볼트 정도의 전압을 가진다. 이러한 발전 전류는 고압변전소에서 15만 4천 볼트 또는 34만 5천 볼트로 승압된 후 저압변전소로 보내지고, 저압변전소에서는 이를 2만 2천 ~ 6만 6천 볼트로 감압하여 수용가 인근의 변압기로 송전한다. 최종적으로 전류는 수용가 인근의 변압기에서 220볼트로 감압되어 수용가에 공급된다.In general, in Korea, the current produced by power plants such as hydropower, thermal power, and nuclear power has a voltage of about 10 to 50,000 volts. This power generation current is boosted to 154,000 volts or 345,000 volts in a high-voltage substation, and then sent to a low-voltage substation, and in a low-voltage substation, it is reduced to 22,000 ~ 66,000 volts to a transformer near the customer. Transmit. Finally, the current is reduced to 220 volts in a transformer near the customer and supplied to the customer.

발전소에서 수용가로 전류를 공급하기 위한 송전 및 배전 선로는 전선이 철탑, 전주 등을 통해 연결된 가공선로 구간과, 전선을 땅속에 묻어 연결하는 지중선로 구간이 존재하게 되는데, 최근 도시 지역에서는 미관 및 안전을 위하여 지중선로 방식의 시공이 많이 이루어지고 있다.Transmission and distribution lines for supplying electric current from power plants to customers include overhead line sections in which wires are connected through steel towers, poles, etc., and underground line sections that connect wires by burying them in the ground. For this purpose, a lot of construction of the underground line method is being carried out.

상기와 같은 지중선로 방식에서 변압기는 전주 상부에 설치되지 않고 보통 도로가의 인도에 박스 형태로 설치된다. 이러한 변압기를 통상 지상변압기로 지칭하기도 한다.In the underground line method as described above, the transformer is not installed on the top of the electric pole, but is usually installed in the form of a box on the sidewalk of the road. Such a transformer is also commonly referred to as a ground transformer.

이와 같은 지중 배전 변압기(10)는, 도 1에 도시된 바와 같이, 전면에 도어(12)를 구비한 직육면체 박스 형상의 외함(11) 내부에 ‘변압기 본체(미도시)’(이하, ‘변압기’로 지칭함)가 설치되는 구조로 이루어진다.Such an underground distribution transformer 10, as shown in FIG. 1, is a'transformer body (not shown)' (hereinafter,'transformer ') is installed.

상기 외함(11)의 내부에는 변압기가 내장된 공간과 그 전방 공간을 구획하는 분리벽이 존재하며, 분리벽은 고압측 벽(13)과 저압측 벽(14)으로 구분된다.Inside the enclosure 11, there is a space in which a transformer is installed and a partition wall partitioning a space in front of the space, and the partition wall is divided into a high-pressure side wall 13 and a low-voltage side wall 14.

고압측 벽(13)에는 변압기의 고압 전류 입력단자에 전기적으로 연결된 부싱인서트(미도시)가 설치되어 있고, 그 부싱인서트에 전류 공급측 지중 선로에 연결된 고압 케이블(16)이 엘보접속재(15)를 매개로 연결되어 있다.The high voltage side wall 13 has a bushing insert (not shown) electrically connected to the high voltage current input terminal of the transformer, and the high voltage cable 16 connected to the underground line on the current supply side to the bushing insert connects the elbow connector 15 It is connected by medium.

또한 고압측 벽(13)에는 부싱인서트에서 분리된 엘보접속재(15)를 거치해 둘 수 있도록 파킹스탠드(17)가 설치되어 있다.In addition, a parking stand 17 is installed on the high-pressure side wall 13 so that the elbow connector 15 separated from the bushing insert can be mounted.

저압측 벽(14)에는 저압측 단자(18)가 돌출 설치되고, 그 저압측 단자(18)에 수용가측 지중 선로에 연결된 저압 케이블(19)이 연결되어 있다.A low-voltage side terminal 18 is protruded from the low-voltage side wall 14, and a low-voltage cable 19 connected to an underground line on the customer side is connected to the low-voltage side terminal 18.

따라서 전류는 고압 케이블(16)을 통해 변압기로 입력되고, 감압된 2차 전류는 저압 케이블(19)과 그에 연결된 수용가측 지중 선로를 따라 흘러 각각의 수용가로 공급된다.Accordingly, the current is input to the transformer through the high-voltage cable 16, and the reduced secondary current flows along the low-voltage cable 19 and the underground line connected thereto and is supplied to each customer.

한편, 변압기의 수리나 교체를 위해서는 먼저 변압기가 설치된 지중 선로를 휴전시키고, 이후 휴전된 지중 선로를 접지하여 만일의 감전 사고에 대비하게 된다.On the other hand, in order to repair or replace a transformer, the underground line on which the transformer is installed is first shut down, and then the ground line on which the transformer is installed is grounded to prepare for an electric shock accident.

휴전된 지중 선로의 접지는 상기 고압 케이블(16)을 이용하여 실시할 수 있는데, 현재 고압 케이블(16)용 전용 접지기구가 마련되어 있지 않은 문제점이 있다.The grounding of a ceasefired underground line can be performed using the high-voltage cable 16, but there is a problem that a dedicated grounding mechanism for the high-voltage cable 16 is not currently provided.

따라서 현장에서는 엘보접속재(15)를 부싱인서트에서 분리하고, L렌치를 이용하여 엘보접속재(15) 내의 아크봉을 분리한 후, 아크 소호 부분이 제거된 다른 아크봉을 엘보접속재(15)에 다시 설치하고, 그 아크봉과 접지선을 동바인드 또는 나동선으로 연결하는 비규정 접지방법을 이용하고 있다.Therefore, in the field, after separating the elbow connector 15 from the bushing insert, and separating the arc rod in the elbow connector 15 using an L wrench, the other arc rod from which the arc extinguishing part has been removed is reloaded into the elbow connector 15. It is installed and uses a non-standard grounding method that connects the arc rod and the ground wire with a copper bind or a bare copper wire.

상기와 같이 비규정 접지방법을 사용하고 있기 때문에, 접지 상태가 불량한 경우가 많으며, 이에 변압기나 엘보접속재(15) 등이 소손되는 설비 피해가 발생하고 있으며, 감전사고의 위험이 상존하는 문제점이 있다.Since the non-regulated grounding method is used as described above, the grounding condition is often poor, and there is a problem in that there is a problem in that the transformer or the elbow connector 15 is damaged, and there is a risk of an electric shock accident. .

대한민국 등록특허공보 제10-0207006호(1999.04.10. 등록)Republic of Korea Patent Publication No. 10-0207006 (registered on April 10, 1999)

이에 본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 고압 케이블의 엘보접속재에 결합하여 지중 배전 선로를 접지할 수 있도록 된 지중 배전 변압기의 고압 케이블용 접지기구를 제공함에 그 목적이 있다.Accordingly, the present invention has been conceived to solve the above problems, and an object of the present invention is to provide a grounding mechanism for a high-voltage cable of an underground distribution transformer capable of grounding an underground distribution line by being coupled to an elbow connector of a high-voltage cable.

상기와 같은 목적을 달성하기 위한 본 발명에 따른 지중 배전 변압기의 고압 케이블용 접지기구는, 고압 케이블의 엘보접속재에 삽입 결합되는 절연 재질의 바디와, 상기 바디의 내부에 설치되어 엘보접속재에 바디가 삽입되었을 때 엘보접속재의 아크봉과 전기적으로 연결되는 접속단자와, 상기 접속단자에 연결된 케이블과, 상기 케이블의 타단에 구비되어 지중에 기 설치된 접지선에 케이블을 연결해주는 클램프를 포함하여 구성될 수 있다.The earthing mechanism for a high-voltage cable of an underground distribution transformer according to the present invention for achieving the above object includes a body of an insulating material inserted into and coupled to the elbow connector of the high-voltage cable, and a body installed inside the body of the elbow connector. When inserted, a connection terminal electrically connected to the arc rod of the elbow connector, a cable connected to the connection terminal, and a clamp provided at the other end of the cable to connect the cable to a ground wire pre-installed in the ground.

또한, 본 발명에 따른 지중 배전 변압기의 고압 케이블용 접지기구는 고압 케이블의 엘보접속재에 삽입 결합되는 절연재질의 바디와, 상기 바디의 내부에 설치되어 엘보접속재에 바디가 삽입되었을 때 상기 엘보접속재의 아크봉과 전기적으로 연결되는 접속단자와, 상기 접속단자에 연결된 케이블과, 상기 케이블의 타단에 연결된 전도성 재질의 접속부재와, 상기 접속부재에 형성된 관통홀을 통해 대지에 박혀 접지를 이루는 전도성 재질의 접지봉을 포함하여 구성될 수 있다.In addition, the grounding mechanism for a high-voltage cable of an underground distribution transformer according to the present invention includes a body of insulating material inserted into the elbow connector of the high-voltage cable, and the body of the elbow connector when the body is inserted into the elbow connector installed inside the body. A connection terminal electrically connected to the arc rod, a cable connected to the connection terminal, a connection member made of a conductive material connected to the other end of the cable, and a grounding rod made of a conductive material embedded in the ground through a through hole formed in the connection member to form ground. It can be configured to include.

이상 설명한 바와 같은 본 발명에 따르면, 지중 배전 변압기의 고압 케이블 전용의 접지기구가 마련됨으로써 이를 규정 접지기구로 사용할 수 있다.According to the present invention as described above, by providing a grounding mechanism exclusively for high-voltage cables of an underground distribution transformer, it can be used as a prescribed grounding mechanism.

상기와 같은 본 발명에 따른 접지기구는 고압 케이블의 엘보접속재에 단순 삽입 방식으로 결합됨으로써 접지 작업이 매우 용이하고 신속하게 이루어지는 효과가 있다.The grounding mechanism according to the present invention as described above is coupled to the elbow connector of the high-voltage cable by a simple insertion method, thereby making the grounding operation very easy and quick.

또한, 본 발명에 따른 접지기구를 이용하면 지중 선로의 접지가 확실하게 이루어짐으로써 접지 불량에 의한 안전사고(감전사고)를 예방할 수 있을 뿐만 아니라 변압기와 엘보접속재의 소손이 방지되는 효과가 있다.In addition, when the grounding device according to the present invention is used, the grounding of the underground line is reliably achieved, thereby preventing safety accidents (electric shock accidents) caused by poor grounding, as well as preventing damage to the transformer and the elbow connector.

도 1은 일반적인 지중 배전 변압기의 외형 사시도.
도 2는 지중 배전 변압기의 고압 케이블에 연결된 엘보접속재의 단면도.
도 3은 본 발명에 따른 지중 배전 변압기의 고압 케이블용 접지기구의 구성도.
도 4는 본 발명에 따른 지중 배전 변압기의 고압 케이블용 접지기구의 다른 실시예를 도시한 도면.1 is an external perspective view of a general underground distribution transformer.
2 is a cross-sectional view of an elbow connector connected to a high-voltage cable of an underground distribution transformer.
3 is a block diagram of a grounding mechanism for a high-voltage cable of an underground distribution transformer according to the present invention.
4 is a view showing another embodiment of a grounding mechanism for a high-voltage cable of an underground distribution transformer according to the present invention.

본 발명은 다양한 변경을 가할 수 있고 여러 가지 실시예를 가질 수 있는 바, 특정 실시예들을 도면에 예시하고 상세하게 설명하고자 한다. 그러나, 이는 본 발명을 특정한 실시 형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. 첨부된 도면에 도시된 선들의 두께나 구성요소의 크기 등은 설명의 명료성과 편의를 위해 과장되게 도시되어 있을 수 있다.In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. The thicknesses of lines or sizes of components shown in the accompanying drawings may be exaggerated for clarity and convenience of description.

또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 판례에 따라 달라질 수 있다. 그러므로, 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 하여 내려져야 할 것이다.In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intentions or precedents of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

이하, 본 발명에 따른 바람직한 실시예를 첨부된 도면을 참조하여 상세하게 설명한다. 변압기 관련해서는 도 1을 참조하면서 그에 표시된 도면부호를 그대로 사용하여 설명한다.Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. With reference to FIG. 1, the transformer will be described using reference numerals indicated therein.

도 2는 지중 배전 변압기의 고압 케이블에 연결된 엘보접속재(15)의 단면도로서, 본 발명에 따른 지중 배전 변압기의 고압 케이블용 접지기구(100)(도 3 참조)가 결합되는 대상인 고압 케이블(16)측 엘보접속재(15)의 구조를 먼저 설명하기로 한다.2 is a cross-sectional view of an elbow connector 15 connected to a high-voltage cable of an underground distribution transformer, and a high-voltage cable 16 as a target to which the grounding mechanism 100 (see FIG. 3) for a high-voltage cable of an underground distribution transformer according to the present invention is coupled. The structure of the side elbow connector 15 will be described first.

상기 고압 케이블(16)의 엘보접속재(15)는 엘보바디(15a)의 일단에 고압 케이블(16)이 연결되고 타단에 상기 고압 케이블(16)에 전기적으로 연결된 아크봉(15c)이 돌출된 구조로 이루어져 있다. 아크봉(15c)은 고압 케이블(16)이 변압기에 연결될 때 부싱인서트에 삽입되어 전기적으로 연결되는 부분이다.The elbow connector 15 of the high-voltage cable 16 has a structure in which a high-voltage cable 16 is connected to one end of the elbow body 15a, and an arc rod 15c electrically connected to the high-voltage cable 16 is protruded at the other end. Consists of. The arc rod 15c is a part that is electrically connected by being inserted into the bushing insert when the high voltage cable 16 is connected to the transformer.

상기 엘보바디(15a)는 L형상의 절연체로서 일측 단부로 고압 케이블(16)이 삽입된다. 코압 케이블(16)은 연결단자(15b)에 연결되며, 연결단자(15b)의 단부에 아크봉(15c)의 일측 단부에 형성된 원형고리부(15cc)가 결합된다.The elbow body 15a is an L-shaped insulator and a high-voltage cable 16 is inserted into one end thereof. The co-pressure cable 16 is connected to the connection terminal 15b, and a circular ring portion 15cc formed at one end of the arc rod 15c is coupled to the end of the connection terminal 15b.

아크봉(15c)의 타단부는 엘보바디(15a)의 수평부 외측으로 돌출되어 있으며, 이 부분에 아크소호부(15ca)가 형성되어 있다.The other end of the arc rod 15c protrudes outside the horizontal portion of the elbow body 15a, and an arc extinguishing portion 15ca is formed in this portion.

엘보바디(15a) 수평부의 내주면은 엘보바디(15a) 중간의 절곡부에서 수평부의 단부로 갈수록 그 내경이 점차 증가하는 원추면(15aa)으로 형성되어 있다. 즉, 엘보바디(15a)의 수평부 내부는 원추형 공간으로 형성되어 있다.The inner circumferential surface of the horizontal portion of the elbow body 15a is formed as a conical surface 15aa whose inner diameter gradually increases from the bent portion in the middle of the elbow body 15a to the end of the horizontal portion. That is, the inside of the horizontal portion of the elbow body 15a is formed in a conical space.

도 3은 본 발명에 따른 지중 배전 변압기의 고압 케이블용 접지기구(100)를 도시한 것이다. 본 발명에 따른 접지기구(100)는 바디(110), 접속단자(120), 케이블(130), 클램프(140)를 포함한다.3 shows a grounding mechanism 100 for a high-voltage cable of an underground distribution transformer according to the present invention. The grounding mechanism 100 according to the present invention includes a body 110, a connection terminal 120, a cable 130, and a clamp 140.

상기 바디(110)는 원통 형상의 절연체로서 전방 단부에 원추부(111)가 형성된다.The body 110 is a cylindrical insulator and has a conical part 111 at its front end.

원추부(111)는 바디(110)의 원통 부분에서 전방 단부로 갈수록 직경이 점차 감소하는 기울기를 가지며, 그 기울기는 상기 엘보접속재(15) 수평부의 내부 원추면(15aa)의 기울기와 동일하다. 따라서 바디(110)를 엘보접속재(15)에 삽입하였을 때 바디(110)의 원추부(111)가 엘보접속재(15)의 원추면(15aa) 내측부에 안착될 수 있게 되어 바디(110)와 엘보접속재(15)의 결합이 안정적으로 이루어지도록 되어 있다.The conical part 111 has a slope that gradually decreases in diameter from the cylindrical portion of the body 110 to the front end, and the slope is the same as the slope of the inner conical surface 15aa of the horizontal portion of the elbow connector 15. Therefore, when the body 110 is inserted into the elbow connector 15, the conical portion 111 of the body 110 can be seated on the inner side of the conical surface 15aa of the elbow connector 15, so that the body 110 and the elbow connector The combination of (15) is designed to be made stably.

상기 접속단자(120)는 대략 원통형으로 형성되어 바디(110)의 내부 중앙에 설치되고, 중심축 방향을 따라 결합홀(121)이 형성된다. 결합홀(121)은 바디(110)의 전방 단부쪽으로 개구되어 있다.The connection terminal 120 is formed in a substantially cylindrical shape and installed in the inner center of the body 110, and a coupling hole 121 is formed along the central axis direction. The coupling hole 121 is opened toward the front end of the body 110.

상기 결합홀(121)의 내경은 엘보접속재(15)의 아크봉(15c) 외경과 동일한 크기로 형성되어, 아크봉(15c)이 결합홀(121)에 삽입되었을 때 유동이 발생하지 않고 상호간에 양호한 면접촉을 이룰 수 있도록 되어 있다.The inner diameter of the coupling hole 121 is formed to have the same size as the outer diameter of the arc rod 15c of the elbow connector 15, so that no flow occurs when the arc rod 15c is inserted into the coupling hole 121 It is designed to achieve good face contact.

접속단자(120)의 후단에는 바디(110)의 후단 하부를 통해 삽입된 케이블(130)의 일단이 연결된다.One end of the cable 130 inserted through the lower end of the rear end of the body 110 is connected to the rear end of the connection terminal 120.

상기 케이블(130)의 타단에는 전도성 재질의 클램프(140)가 구비된다. 클램프(140)는 접지선(200)을 감쌀 수 있는 고리 형상으로 형성되며, 조임나사(141)를 구비하여 접지선(200)에 고정할 수 있도록 되어 있다.The other end of the cable 130 is provided with a clamp 140 made of a conductive material. The clamp 140 is formed in a ring shape capable of wrapping the ground wire 200, and is provided with a tightening screw 141 to be fixed to the ground wire 200.

상기 접지선(200)은 변압기 설치시 변압기 하측 대지에 접지 상태로 설치된 것이며 본 발명에 따른 접지기구(100)를 이용하여 배전선로 접지 작업을 실시할 때 사용할 수 있도록 그 일부가 변압기 외함(11)의 내측에 노출된 상태로 설치된다.The ground wire 200 is installed in a grounded state on the lower ground of the transformer when the transformer is installed, and a part of the ground wire 200 is part of the transformer enclosure 11 so that it can be used when grounding the distribution line using the grounding device 100 according to the present invention. It is installed in an exposed state inside.

상기 접속단자(120)의 내경부에는 결합홀(121)의 내측으로 돌출된 반원 형상의 고정부(122)가 형성될 수 있다. 고정부(122)는 결합홀(121)의 원주방향 전둘레에 형성된 일종의 걸림턱이다.A semicircular fixing part 122 protruding into the coupling hole 121 may be formed in the inner diameter part of the connection terminal 120. The fixing part 122 is a kind of locking jaw formed on the entire circumference of the coupling hole 121 in the circumferential direction.

상기 고정부(122)에 대응하여 엘보접속재(15)의 아크봉(15c)에는 반경 방향 내측으로 오목한 결합홈(15cb)이 형성된다. 결합홈(15cb)의 단면 형상은 반드시 고정부(122)와 동일한 반원형일 필요는 없고 예시된 바와 같이 바닥으로 갈수록 폭이 좁아지는 사다리꼴 형상으로 형성될 수도 있다. 결합홈(15cb) 역시 아크봉(15c)의 원주면 전둘레에 걸쳐 형성된다. Corresponding to the fixing part 122, the arc rod 15c of the elbow connector 15 is formed with a concave coupling groove 15cb in the radial direction. The cross-sectional shape of the coupling groove 15cb does not necessarily have to be the same semicircular shape as the fixing part 122, and may be formed in a trapezoidal shape whose width becomes narrower toward the floor as illustrated. The coupling groove (15cb) is also formed over the entire circumference of the circumferential surface of the arc rod (15c).

따라서 아크봉(15c)이 접속단자(120)의 결합홀(121)에 삽입되었을 때 고정부(122)가 걸림홈(15cb)에 삽입되어 걸려짐으로써 아크봉(15c)이 결합홀(121)에서 잘 빠지지 않게 된다. 이러한 구조는 접지기구(100)의 바디(110)와 엘보접속재(15)의 결합상태를 안정적으로 유지하는데 도움이 된다.Therefore, when the arc rod (15c) is inserted into the coupling hole (121) of the connection terminal (120), the fixing portion (122) is inserted and caught in the locking groove (15cb), so that the arc rod (15c) is inserted into the coupling hole (121). It does not fall out well in. This structure helps to stably maintain the bonding state of the body 110 and the elbow connector 15 of the grounding mechanism 100.

상기 바디(110)의 후단에는 거치부(150)가 구비된다. 거치부(150)는 대략 원형판 형상이며 그 테두리는 강도 보강 및 외함(11)의 고압측 벽(13)에 설치된 파킹스탠드(17) 내부의 삽입공간의 크기를 고려하여 플랜지 형태로 절곡 형성되어 있다. 따라서 거치부(150)를 외함(11)의 파킹스탠드(17)에 삽입하여 거치해둘 수 있다.A mounting part 150 is provided at the rear end of the body 110. The mounting portion 150 has an approximately circular plate shape, and its rim is bent in a flange shape in consideration of strength reinforcement and the size of the insertion space inside the parking stand 17 installed on the high-pressure side wall 13 of the enclosure 11. . Accordingly, the mounting portion 150 may be inserted into the parking stand 17 of the enclosure 11 and mounted thereon.

한편, 대지에 먼저 접지되어 있는 접지선(200)이 설치되어 있지 않은 경우에 대비하여 접지기구(100)는 도 4와 같은 구성으로 이루어질 수 있다.On the other hand, in preparation for a case where the ground wire 200 grounded first on the ground is not installed, the grounding mechanism 100 may have a configuration as shown in FIG. 4.

도 4에 도시된 실시예의 접지기구(100)는 케이블(130)의 단부에 클램프(140) 대신 접속부재(160)와 접지봉(170)을 구비하는 것에 특징이 있다. 그 외 바디(110), 접속단자(120), 케이블(130), 거치부(150) 등의 구성은 도 3의 실시예와 모두 동일하다.The grounding mechanism 100 of the embodiment shown in FIG. 4 is characterized in that it has a connection member 160 and a grounding rod 170 instead of a clamp 140 at the end of the cable 130. Other configurations of the body 110, the connection terminal 120, the cable 130, and the mounting portion 150 are the same as those of the embodiment of FIG. 3.

상기 접속부재(160)는 전도체로서 케이블(130)에 전기적으로 연결된다. 연결 구조는 케이블(130)의 심선을 접속부재(160)의 외주에 감아 고정할 수도 있고, 전도성 재질로 제작된 브라켓과 볼트 등의 별도의 결합수단을 이용하여 연결할 수도 있으며, 납땜과 용접 등의 방법을 이용할 수도 있는 등 다양하며, 케이블(130)과 접속부재(160)를 전기적, 물리적으로 견고하고 안정적으로 연결할 수 있으면 족하고 특정 구조로 한정되지 않는다.The connection member 160 is electrically connected to the cable 130 as a conductor. The connection structure may be fixed by winding the core wire of the cable 130 around the outer circumference of the connection member 160, or may be connected using a separate coupling means such as a bracket and bolt made of a conductive material. The method may be used, and the like, and it is sufficient if the cable 130 and the connecting member 160 can be electrically and physically solidly and stably connected, and is not limited to a specific structure.

접속부재(160)에는 상하 방향으로 관통홀(161)이 형성되고, 그 관통홀(161)을 통해 접지봉(170)이 삽입된다.A through hole 161 is formed in the connection member 160 in the vertical direction, and the ground rod 170 is inserted through the through hole 161.

상기 접지봉(170)은 전도체이며, 길이가 긴 원형봉 형상의 바디 상단에 원형의 헤드부(171)가 형성되고, 바디 하단부(172)는 뾰족한 형상으로 형성된다. 따라서 접속부재(160)와 전기적으로 연결되며, 해머로 헤드부(171)를 타격하여 땅속으로 박아 넣을 수 있도록 되어 있다.The ground rod 170 is a conductor, and a circular head portion 171 is formed on an upper end of the body having a long circular rod shape, and the body lower portion 172 is formed in a pointed shape. Therefore, it is electrically connected to the connection member 160, and is designed to be driven into the ground by hitting the head portion 171 with a hammer.

따라서 기설치된 접지선(200)이 없는 경우, 접지봉(170)을 접속부재(160)의 관통홀(161)을 통해 삽입하고, 그 상태에서 헤드부(171)를 타격하여 땅에 박으면 케이블(130), 접속부재(160), 접지봉(170)을 통해 접지기구(100)가 대지에 접지되고, 그 상태에서 바디(110)를 엘보접속재(15)에 삽입 결합함으로써 고압케이블(16)을 이용하여 지중 선로를 접지할 수 있다.Therefore, if there is no pre-installed ground wire 200, the ground rod 170 is inserted through the through hole 161 of the connecting member 160, and in that state, if the head 171 is hit and put into the ground, the cable 130 ), the connection member 160, the grounding device 100 is grounded to the ground through the grounding rod 170, and in that state, the body 110 is inserted and coupled to the elbow connector 15 by using the high-voltage cable 16. The underground line can be grounded.

접지봉(170)을 최대한 땅에 박으면 헤드부(171)가 접속부재(160)를 밀착 가압하여 접속부재(160)도 지표에 밀착된다. 접속부재(160)와 접지봉(170)은 양자 사이의 접촉면 즉, 접속부재(160)의 상면과 접지봉(170)의 헤드부(171) 하면 사이, 접속부재(160)의 관통홀(161) 내주면과 접지봉(170)의 바디 외주면 사이를 통해 전기적으로 접속된다.When the ground rod 170 is driven to the ground as much as possible, the head portion 171 presses the connection member 160 in close contact, so that the connection member 160 is also in close contact with the ground. The connection member 160 and the ground rod 170 are a contact surface between both, that is, between the upper surface of the connection member 160 and the lower surface of the head portion 171 of the ground rod 170, and the inner circumferential surface of the through hole 161 of the connection member 160 And the ground rod 170 is electrically connected through the outer circumferential surface of the body.

따라서 접지기구(100)의 케이블(130)은 접속부재(160)만을 통해서 접지되거나 접속부재(160)와 접지봉(170) 모두를 통해서 접지될 수 있다.Therefore, the cable 130 of the grounding device 100 may be grounded only through the connection member 160 or may be grounded through both the connection member 160 and the grounding rod 170.

한편, 상기 접속부재(160)는 헤드부(171)가 누르는 힘만에 의해서도 대지 접촉 상태가 안정적으로 유지될 수 있으나, 도 4와 같이 접속부재(160)의 하면에 다수의 돌기(162)가 형성되어, 그 돌기(162)가 지표에 박힘으로써 대지 접촉 상태가 더욱 안정적으로 유지될 수 있다.On the other hand, the connection member 160 can stably maintain the ground contact state only by the force pressed by the head portion 171, but a plurality of protrusions 162 are formed on the lower surface of the connection member 160 as shown in FIG. 4. As a result, the protrusion 162 is embedded in the ground, so that the ground contact state can be more stably maintained.

상기 돌기(162)가 지표에 박히면 접속부재(160)가 접지봉(170)을 중심으로 회동하는 것을 방지할 수 있게 되므로 케이블(130)의 유동이 방지되어 접지기구(100)의 설치 상태가 보다 안정적으로 유지될 수 있다.When the protrusion 162 is embedded in the ground, it is possible to prevent the connection member 160 from rotating around the ground rod 170, so that the flow of the cable 130 is prevented, so that the installation state of the grounding mechanism 100 is better. It can be kept stable.

이제 본 발명의 작용 효과를 설명한다.Now, the effects of the present invention will be described.

지중 배전 선로 접지를 위하여 작업자는 접지기구(100)의 클램프(140)를 접지선(200)에 연결하여 접지기구(100)를 먼저 접지 상태로 만들고, 이후 엘보접속재(15)를 고압측 벽(13)의 부싱인서트에서 분리하고, 엘보접속재(15)에 접지기구(100)의 바디(110)를 삽입하여 이들을 상호 결합한다(이때 지중 배전 선로는 휴선 상태이다).In order to ground the underground distribution line, the operator connects the clamp 140 of the grounding device 100 to the ground wire 200 to first ground the grounding device 100, and then attach the elbow connector 15 to the high-voltage side wall 13 ) Of the bushing insert, insert the body 110 of the grounding mechanism 100 into the elbow connector 15 and connect them to each other (at this time, the underground distribution line is in a closed state).

엘보접속재(15)에 상기 바디(110)가 삽입되면, 엘보접속재(15)의 아크봉(15c)이 바디(110) 접속단자(120)의 결합홀(121)에 삽입되어 아크봉(15c)과 접속단자(120)의 전기적 연결이 이루어짐으로써 지중 배전 선로가 고압케이블(16), 엘보접속재(15), 접지기구(100), 접지선(200)을 통해 접지된다.When the body 110 is inserted into the elbow connector 15, the arc rod 15c of the elbow connector 15 is inserted into the coupling hole 121 of the body 110 connection terminal 120, and the arc rod 15c The underground power distribution line is grounded through the high-voltage cable 16, the elbow connector 15, the grounding mechanism 100, and the ground wire 200 by making electrical connection between the connection terminal 120 and the connection terminal 120.

따라서 지중 배전 선로에 의한 감전사고 우려 없이 변압기의 수리 및 교체 작업을 안전하게 수행할 수 있다.Therefore, it is possible to safely perform repair and replacement work for transformers without fear of electric shock accidents caused by underground distribution lines.

상기와 같은 본 발명에 따른 접지 기구(100)가 제공됨으로써 지중 배전 선로에 연결되어 있는 고압케이블(16)을 이용하여 지중 배전 선로를 용이하게 접지할 수 있게 된다.By providing the grounding device 100 according to the present invention as described above, it is possible to easily ground the underground distribution line using the high-voltage cable 16 connected to the underground distribution line.

특히 상기 접지기구(100)는 클램프(140)를 접지선(200)에 연결하고, 바디(110)를 엘보접속재(15)에 삽입하는 것만으로 접지가 이루어지므로 접지 작업이 매우 간편하고 신속하게 이루어질 수 있다.In particular, since the grounding mechanism 100 is grounded only by connecting the clamp 140 to the ground wire 200 and inserting the body 110 into the elbow connector 15, the grounding operation can be performed very easily and quickly. have.

즉, 종래와 같이 고압케이블(16)을 접지선(200)에 연결하기 위하여 엘보접속재(15)의 아크봉(15c)을 분리하여 아크소호부(15ca)가 제거된 아크봉을 재설치하고, 이를 동바인드나 나동선으로 접지선(200)에 연결하는 비규정 작업을 실시할 필요가 없으므로 접지 작업이 매우 용이하고 신속하다.In other words, in order to connect the high-voltage cable 16 to the ground wire 200 as in the related art, the arc rod 15c of the elbow connector 15 is separated, and the arc rod from which the arc extinguishing portion 15ca is removed is reinstalled. Since there is no need to perform an unregulated operation of connecting to the ground wire 200 by a bind or a bare copper wire, the grounding operation is very easy and quick.

또한, 동바인드나 나동선 대신에 아크봉(15c)이 접속단자(120)의 결합홀(121)에 삽입되어 결합되는 견고한 접속구조를 가지며, 이에 더하여 바디(110)와 엘보접속재(15)가 서로 동일한 기울기를 가지는 원추부(111)와 원추면(15aa)이 상호 밀착되는 상태로 결합되는 안정적인 결합구조를 가짐으로써 엘보접속재(15)와 접지기구(100)의 바디(110)가 상호 유동 없이 매우 견고하게 연결된다.In addition, instead of a copper bind or a bare copper wire, the arc rod 15c is inserted into the coupling hole 121 of the connection terminal 120 and has a rigid connection structure. In addition, the body 110 and the elbow connector 15 The body 110 of the elbow connector 15 and the grounding mechanism 100 is very robust without mutual flow by having a stable coupling structure in which the conical portion 111 having the same inclination and the conical surface 15aa are in close contact with each other. Connected to each other.

따라서 접지 상태가 매우 확실하게 유지되므로 접지 불량에 의한 변압기나 엘보접속재의 소손사고나 작업자 감전사고가 확실하게 방지될 수 있다.Therefore, since the grounding state is very surely maintained, burnout accidents of transformers or elbow joints due to poor grounding, and electric shock accidents of workers can be reliably prevented.

따라서, 상기 접지기구(100)를 규정 접지기구로 정하여 사용할 수 있으며, 이에 작업자들이 보다 편안한 마음으로 신속하고 용이하게 접지 작업을 수행할 수 있게 된다.Accordingly, the grounding device 100 can be used as a prescribed grounding device, and thus, workers can quickly and easily perform the grounding operation with a more comfortable mind.

한편, 변압기 외함(11) 내부에 기설치된 접지선(200)이 존재하지 않는 경우, 위에서 설명한 바와 같이, 케이블(130)의 단부에 클램프(140) 대신 접속부재(160)와 접지봉(170)이 구비된 접지기구(100)를 이용할 수 있음은 위에서 설명한 바와 동일하다. 접지기구(100)의 접지가 접지봉(170)을 땅에 박아 넣는 것으로 대신하는 것을 제외하면 그 외 작업 방법 및 효과는 클램프(140)를 이용하여 접지선(200)에 접지하는 경우와 동일하므로 중복 설명은 생략한다.On the other hand, when the ground wire 200 already installed inside the transformer enclosure 11 does not exist, as described above, a connection member 160 and a ground rod 170 are provided at the end of the cable 130 instead of the clamp 140 It is the same as described above that the grounding mechanism 100 can be used. Except that the grounding of the grounding device 100 is replaced by inserting the grounding rod 170 into the ground, the other work methods and effects are the same as the case of grounding the grounding wire 200 using the clamp 140, so overlapping description Is omitted.

상술한 바와 같이 본 발명은 도면에 도시된 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. 따라서 본 발명의 진정한 기술적 보호범위는 아래의 특허청구범위에 의해서 정하여져야 할 것이다.As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and various modifications and equivalent other embodiments are provided from those of ordinary skill in the field to which the technology pertains. You will understand that it is possible. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

10 : 지중 배전 변압기 11 : 외함
12 : 도어 13 : 고압측 벽
14 : 저압측 벽 15 : 엘보접속재
15a : 엘보바디 15aa : 원추면
15b : 연결단자 15c : 아크봉
15ca : 아크소호부 15cb : 걸림홈
15cc : 원형고리부 16 : 고압케이블
17 : 파킹스탠드 18 : 저압측 단자
19 : 저압 케이블
100 : 접지기구 110 : 바디
111 : 원추부 120 : 접속단자
121 : 결합홀 122 : 고정부
130 : 케이블 140 : 클램프
141 : 조임나사 150 : 거치부
160 : 접속부재 161 : 관통홀
162 : 돌기 170 : 접지봉
171 : 헤드부 172 : 바디 하단부10: underground distribution transformer 11: enclosure
12: door 13: high pressure side wall
14: low pressure side wall 15: elbow connector
15a: elbow body 15aa: conical surface
15b: connection terminal 15c: arc rod
15ca: arc-soho part 15cb: locking groove
15cc: circular ring 16: high-voltage cable
17: parking stand 18: low pressure side terminal
19: low voltage cable
100: folding mechanism 110: body
111: cone 120: connection terminal
121: coupling hole 122: fixing part
130: cable 140: clamp
141: pressure screw 150: mounting portion
160: connecting member 161: through hole
162: protrusion 170: ground rod
171: head portion 172: lower body portion

Claims (12)

고압 케이블의 엘보접속재에 삽입 결합되는 절연 재질의 바디와;
상기 바디의 내부에 설치되어 엘보접속재에 바디가 삽입되었을 때 엘보접속재의 아크봉과 전기적으로 연결되는 접속단자와;
상기 접속단자에 연결된 케이블과;
상기 케이블의 타단에 구비되어 지중에 기 설치된 접지선에 케이블을 연결해주는 클램프;
를 포함하는 지중 배전 변압기의 고압 케이블용 접지기구.A body of an insulating material inserted into and coupled to the elbow connector of the high-voltage cable;
A connection terminal installed inside the body and electrically connected to the arc rod of the elbow connector when the body is inserted into the elbow connector;
A cable connected to the connection terminal;
A clamp provided at the other end of the cable to connect the cable to a ground wire already installed in the ground;
Grounding mechanism for a high-voltage cable of an underground distribution transformer comprising a. 청구항 1에 있어서,
상기 바디의 전방 단부에 엘보접속재의 내부 원추면과 동일한 기울기를 가지는 원추부가 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method according to claim 1,
Grounding mechanism for a high-voltage cable of an underground distribution transformer, characterized in that a conical portion having the same inclination as the inner conical surface of the elbow connector is formed at the front end of the body. 청구항 1에 있어서,
상기 접속단자에 엘보접속재의 아크봉이 삽입 결합되는 결합홀이 축방향으로 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method according to claim 1,
A grounding mechanism for a high voltage cable of an underground distribution transformer, characterized in that a coupling hole into which the arc rod of the elbow connector is inserted and coupled to the connection terminal is formed in an axial direction. 청구항 3에 있어서,
상기 결합홀에 엘보접속재의 아크봉에 형성된 걸림홈에 삽입되어 걸려지는 고정부가 반경 방향 내측으로 돌출 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method of claim 3,
A grounding mechanism for a high-voltage cable of an underground power distribution transformer, characterized in that the fixing part protruding radially inward is inserted into the engaging groove formed in the arc rod of the elbow connector in the coupling hole. 청구항 1에 있어서,
상기 바디의 후단에 지중 배전 변압기의 외함 내부 분리벽에 설치된 파킹스탠드에 삽입 결합되어 상기 바디를 거치할 수 있도록 하는 거치부가 구비된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method according to claim 1,
A grounding mechanism for a high-voltage cable of an underground distribution transformer, characterized in that the rear end of the body is inserted into a parking stand installed on an inner dividing wall of an underground distribution transformer and is provided with a mounting portion to allow the body to be mounted. 고압 케이블의 엘보접속재에 삽입 결합되는 절연재질의 바디와;
상기 바디의 내부에 설치되어, 엘보접속재에 바디가 삽입되었을 때 상기 엘보접속재의 아크봉과 전기적으로 연결되는 접속단자와;
상기 접속단자에 연결된 케이블과;
상기 케이블의 타단에 연결된 전도성 재질의 접속부재와;
상기 접속부재에 형성된 관통홀을 통해 대지에 박혀 접지를 이루는 전도성 재질의 접지봉;
을 포함하는 지중 배전 변압기의 고압 케이블용 접지기구.A body of an insulating material inserted into and coupled to the elbow connector of the high-voltage cable;
A connection terminal installed inside the body and electrically connected to the arc rod of the elbow connector when the body is inserted into the elbow connector;
A cable connected to the connection terminal;
A connection member made of a conductive material connected to the other end of the cable;
A grounding rod made of a conductive material to be grounded by being embedded in the ground through a through hole formed in the connection member;
Grounding mechanism for a high-voltage cable of an underground distribution transformer comprising a. 청구항 6에 있어서,
상기 바디의 전방 단부에 엘보접속재의 내부 원추면과 동일한 기울기를 가지는 원추부가 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method of claim 6,
Grounding mechanism for a high-voltage cable of an underground distribution transformer, characterized in that a conical portion having the same inclination as the inner conical surface of the elbow connector is formed at the front end of the body. 청구항 6에 있어서,
상기 접속단자에 엘보접속재의 아크봉이 삽입 결합되는 결합홀이 축방향으로 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method of claim 6,
A grounding mechanism for a high voltage cable of an underground distribution transformer, characterized in that a coupling hole into which the arc rod of the elbow connector is inserted and coupled to the connection terminal is formed in an axial direction. 청구항 8에 있어서,
상기 결합홀에 엘보접속재의 아크봉에 형성된 걸림홈에 삽입되어 걸려지는 고정부가 반경 방향 내측으로 돌출 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method of claim 8,
A grounding mechanism for a high-voltage cable of an underground power distribution transformer, characterized in that the fixing part protruding radially inward is inserted into the engaging groove formed in the arc rod of the elbow connector in the coupling hole. 청구항 6에 있어서,
상기 바디의 후단에 지중 배전 변압기의 외함 내부 분리벽에 설치된 파킹스탠드에 삽입 결합되어 상기 바디를 거치할 수 있도록 하는 거치부가 구비된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method of claim 6,
A grounding mechanism for a high-voltage cable of an underground distribution transformer, characterized in that the rear end of the body is inserted into a parking stand installed on an inner dividing wall of an underground distribution transformer and is provided with a mounting portion to allow the body to be mounted. 청구항 6에 있어서,
상기 접지봉의 바디 상단에 접속부재에 가압 밀착되는 원판형의 헤드부가 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.The method of claim 6,
A grounding mechanism for a high-voltage cable of an underground power distribution transformer, characterized in that a disk-shaped head part pressurized and closely contacted with the connection member is formed on an upper end of the body of the grounding rod. 청구항 6에 있어서,
상기 접속부재의 하면에 지표면에 박히는 다수의 돌기가 형성된 것을 특징으로 하는 지중 배전 변압기의 고압 케이블용 접지기구.

The method of claim 6,
Grounding mechanism for a high-voltage cable of an underground distribution transformer, characterized in that a plurality of protrusions are formed on the lower surface of the connection member.
KR1020190103744A 2019-08-23 2019-08-23 Grounding apparatus for high voltage cable of underground distribution transformer Active KR102708725B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
KR1020190103744A KR102708725B1 (en) 2019-08-23 2019-08-23 Grounding apparatus for high voltage cable of underground distribution transformer
KR1020240123497A KR102722984B1 (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer with cone-shaped section
KR1020240123378A KR20240140031A (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer capable of grounding distribution lines
KR1020240124061A KR20240138057A (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with rapid grounding capability
KR1020240123939A KR102723337B1 (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with disc-shaped head
KR1020240124965A KR20240141154A (en) 2019-08-23 2024-09-12 Grounding apparatus for high voltage cable of underground distribution transformer to prevent safety accidents
KR1020240124779A KR20240141153A (en) 2019-08-23 2024-09-12 Depositable grounding apparatus for high voltage cable of underground distribution transformer
KR1020240125819A KR20240144019A (en) 2019-08-23 2024-09-13 Grounding apparatus for high voltage cable of underground distribution transformer for easy grounding work

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KR1020240123497A Division KR102722984B1 (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer with cone-shaped section
KR1020240123378A Division KR20240140031A (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer capable of grounding distribution lines
KR1020240124061A Division KR20240138057A (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with rapid grounding capability
KR1020240123939A Division KR102723337B1 (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with disc-shaped head
KR1020240124965A Division KR20240141154A (en) 2019-08-23 2024-09-12 Grounding apparatus for high voltage cable of underground distribution transformer to prevent safety accidents
KR1020240124779A Division KR20240141153A (en) 2019-08-23 2024-09-12 Depositable grounding apparatus for high voltage cable of underground distribution transformer
KR1020240125819A Division KR20240144019A (en) 2019-08-23 2024-09-13 Grounding apparatus for high voltage cable of underground distribution transformer for easy grounding work

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KR1020190103744A Active KR102708725B1 (en) 2019-08-23 2019-08-23 Grounding apparatus for high voltage cable of underground distribution transformer
KR1020240123378A Pending KR20240140031A (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer capable of grounding distribution lines
KR1020240123497A Active KR102722984B1 (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer with cone-shaped section
KR1020240123939A Active KR102723337B1 (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with disc-shaped head
KR1020240124061A Pending KR20240138057A (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with rapid grounding capability
KR1020240124965A Pending KR20240141154A (en) 2019-08-23 2024-09-12 Grounding apparatus for high voltage cable of underground distribution transformer to prevent safety accidents
KR1020240124779A Pending KR20240141153A (en) 2019-08-23 2024-09-12 Depositable grounding apparatus for high voltage cable of underground distribution transformer
KR1020240125819A Pending KR20240144019A (en) 2019-08-23 2024-09-13 Grounding apparatus for high voltage cable of underground distribution transformer for easy grounding work

Family Applications After (7)

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KR1020240123378A Pending KR20240140031A (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer capable of grounding distribution lines
KR1020240123497A Active KR102722984B1 (en) 2019-08-23 2024-09-10 Grounding apparatus for high voltage cable of underground distribution transformer with cone-shaped section
KR1020240123939A Active KR102723337B1 (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with disc-shaped head
KR1020240124061A Pending KR20240138057A (en) 2019-08-23 2024-09-11 Grounding apparatus for high voltage cable of underground distribution transformer with rapid grounding capability
KR1020240124965A Pending KR20240141154A (en) 2019-08-23 2024-09-12 Grounding apparatus for high voltage cable of underground distribution transformer to prevent safety accidents
KR1020240124779A Pending KR20240141153A (en) 2019-08-23 2024-09-12 Depositable grounding apparatus for high voltage cable of underground distribution transformer
KR1020240125819A Pending KR20240144019A (en) 2019-08-23 2024-09-13 Grounding apparatus for high voltage cable of underground distribution transformer for easy grounding work

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115939796A (en) * 2022-12-14 2023-04-07 广西电网有限责任公司河池供电局 Low-voltage quick grounding device and method with reliable grounding detection
KR20240029411A (en) * 2022-08-26 2024-03-05 한국전력공사 Adapter for Elbow in Detection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100207006B1 (en) 1996-12-31 1999-07-01 이종수 Molding transformer protection
KR101905441B1 (en) * 2018-05-02 2018-12-05 주식회사 디투엔지니어링 Elbow Insert and its application for live line replacement of the pad mounted transformer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100207006B1 (en) 1996-12-31 1999-07-01 이종수 Molding transformer protection
KR101905441B1 (en) * 2018-05-02 2018-12-05 주식회사 디투엔지니어링 Elbow Insert and its application for live line replacement of the pad mounted transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240029411A (en) * 2022-08-26 2024-03-05 한국전력공사 Adapter for Elbow in Detection
CN115939796A (en) * 2022-12-14 2023-04-07 广西电网有限责任公司河池供电局 Low-voltage quick grounding device and method with reliable grounding detection

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KR20240137542A (en) 2024-09-20
KR20240138056A (en) 2024-09-20
KR102722984B1 (en) 2024-10-29
KR20240144019A (en) 2024-10-02
KR102723337B1 (en) 2024-10-30
KR102708725B1 (en) 2024-09-24
KR20240140031A (en) 2024-09-24
KR20240138057A (en) 2024-09-20
KR20240141154A (en) 2024-09-25
KR20240141153A (en) 2024-09-25

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