KR101581005B1 - Ground system for electric supply line - Google Patents

Ground system for electric supply line Download PDF

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Publication number
KR101581005B1
KR101581005B1 KR1020150111184A KR20150111184A KR101581005B1 KR 101581005 B1 KR101581005 B1 KR 101581005B1 KR 1020150111184 A KR1020150111184 A KR 1020150111184A KR 20150111184 A KR20150111184 A KR 20150111184A KR 101581005 B1 KR101581005 B1 KR 101581005B1
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KR
South Korea
Prior art keywords
manhole
distribution line
short circuit
connector
control unit
Prior art date
Application number
KR1020150111184A
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Korean (ko)
Inventor
안병록
Original Assignee
(주)우신전기기술사사무소
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Priority to KR1020150111184A priority Critical patent/KR101581005B1/en
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Publication of KR101581005B1 publication Critical patent/KR101581005B1/en

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    • G01R31/021—
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • G01R31/024—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

The present invention can quickly identify the facts and short circuit occurrence position in the event of a short circuit in the underground distribution line, take appropriate measures, and can eliminate the conventional troublesome and long time grounding process for grounding the underground distribution line The present invention relates to a grounding method for a distribution line including a manhole, a manhole body, a ground block, a manhole cover, an accident display device, a thermal imaging camera, a control unit, a wireless communication module, The IP CCTV camera which receives the short circuit information to the distribution line in the manhole main body through the wireless communication module is used to photograph the identification information of the manhole body and the short circuit indication by the distribution line of the display band exposed through the transparent auxiliary cover of the manhole cover And transmits shooting information to a situation room for managing a manhole or distribution line, so that the IP CC It is possible to quickly check the occurrence of a short circuit in a power line in a manhole and the position of the manhole through a video transmitted from a TV camera and take related measures.

Description

[0001] The present invention relates to a ground system for electric supply line,

The present invention can quickly identify the facts and short circuit occurrences when a short circuit occurs in the underground distribution line among the power distribution fields, and can quickly take the relevant countermeasures and install the conventional cumbersome and long time grounding rod for grounding of the underground distribution line And a grounding method system of a distribution line that can eliminate the process.

Distribution lines that supply power from the substation to the consumer have to supply power to a large number of customers, so the configuration consists of complicated trunks and branches. Therefore, in case of ground fault (when the wire is disconnected and grounded on the power line) or short circuit (when the wires on different phases are caught) and fault current and voltage are generated, It takes a lot of effort to find it.

In the past, when a fault current and a voltage are generated in a distribution line, a substation operator is operated by a substation operator in order to find faulty current and voltage, It is a common practice to find out the merits by exchanging them.

However, the above-described conventional method has a problem that it takes a lot of time and manpower, and the recovery time becomes longer, so that the blackout time becomes long and inconveniences of the electric power consumer are inconvenient.

Therefore, there is a need for a method of improving the reliability of the power supply and the quality of service for the customer by shortening the power failure time by promptly grasping and recovering the position of the power supply when an accident occurs in the power distribution line.

On the other hand, the grounding equipment provided in the power distribution line is made of a grounding rod made of a metal such as copper, and the grounding bar contacts the ground and is connected to the power distribution line through the power line to ground the power distribution line.

However, the structures such as the manholes in which the underground distribution lines are buried are installed in the underground, and it is difficult to install the grounding rods, and accordingly, it takes a lot of time and manpower to install the grounding facilities.

Korean Patent Laid-Open No. 10-2012-0133766 (published Dec. 12, 2012), "Method of constructing a distribution line using a combined ground wire using a grounding electric pole" Korean Patent Registration No. 10-1012564 (issued on Mar. 23, 2011), "

The embodiment of the present invention provides a grounding system for a distribution line that can promptly check the occurrence of a fault and the occurrence of a short circuit when a short circuit occurs in the underground distribution line so that related measures can be taken.

In addition, the embodiment of the present invention is characterized in that the manhole for installation of the underground distribution line also serves as a grounding structure, so that it is possible to eliminate the conventional cumbersome and long time grounding rod installation procedure for grounding the underground distribution line, Provides a ground method system.

The grounding method of the distribution line according to an embodiment of the present invention includes a manhole for forming an upper portion of a manhole and an upper end of the manhole for exposing the ground, A manhole body formed on an upper surface and connected to the inside of the manhole main body, the manhole body having a plurality of electric wire holes formed on a side surface thereof for passing through a distribution line and having an open bottom, A plurality of protruding terminals are formed on the inner surface of the outer surface of the manhole main body so as to connect the ground line to the power distribution line to be passed through the power hole, Covering the connection area, it is possible to cover the cover layer with corrosion resistance, conductivity and deterioration preventing function to prevent contact with soil. A main cover of an opaque material which covers the through hole of the upper end of the manhole and has a rectangular open space formed therein, and a transparent cover which is coupled to the upper surface of the main cover, A main hall cover installed in the receiving space of the main cover and displaying the facts on the outside when a short circuit of the power line in the manhole body occurs, A pair of normal and reverse rotation motors rotated at the same speed as the normal and reverse rotation motors, a pair of rollers connected to the drive shaft for each of the normal and reverse rotation motors and rotated in conjunction with the driving of the normal and reverse rotation motors, A display panel in which an area exposed externally through the auxiliary cover from the accommodation space is switched, A display for indicating occurrence of a short circuit of the distribution line in the manhole main body and an identification information of the manhole main body are displayed on one surface of the display band, and an accident display device installed inside the manhole main body, A thermal image camera for acquiring an internal thermal image of the manhole body centered on a line; and a controller for storing a normal internal thermal image of the manhole body obtained through the thermal imaging camera as reference data, Wherein the control unit receives the thermal image data in the manhole body in real time and compares and analyzes the data with the reference data to determine whether the power line in the manhole body is short- A control unit for outputting the electric power to the forward / reverse rotation motor; A first connector mounted on the main cover in a state that the first connector is connected to the first connector, and a second connector which is electrically connected to the controller and is detachable from the first connector, And a second connector connected to the control signal output terminal of the control unit of the control unit in parallel with the main control unit and connected to the IP CCTV camera when the short circuit of the power line in the manhole body occurs. A third connector provided on the main lid in a state of being electrically connected to the wireless communication module; and a third connector which is branched from a connection line between the control unit and the second connector, The controller may transmit the control signal of the control unit to the wireless connector The IP CCTV camera having received the short circuit information of the distribution line in the manhole body through the wireless communication module is exposed to the outside through the transparent auxiliary lid of the manhole cover, It is possible to transmit the shooting information to the control room for managing the manhole or the power distribution line by operating the angle for photographing the identification information of the manhole main body and displaying the short circuit by the distribution line of the display band.

According to the embodiment of the present invention, when a short circuit occurs in the underground distribution line, the corresponding fact and the short circuit occurrence position can be promptly checked and related measures can be taken. Accordingly, the power failure due to the short circuit in the underground distribution line can be terminated relatively quickly So that the user convenience can be greatly improved.

Also, since the manhole for the installation of the underground distribution line is also used as the grounding structure, the conventional troublesome and long time grounding procedure for grounding the underground distribution line can be omitted.

1 is a perspective view showing an external configuration of a grounding method system of a distribution line according to an embodiment of the present invention,
2 is a cross-sectional view showing an internal configuration of a grounding method system of a distribution line according to an embodiment of the present invention.
3 is a block diagram showing an electrical configuration of a grounding method system for a distribution line according to an embodiment of the present invention.
And
FIG. 4 is a view showing a state of use of a grounding method system of a distribution line according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It is also to be understood that the position or arrangement of the individual components within each described embodiment may be varied without departing from the spirit and scope of the present invention.

The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which the claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

Whenever an element is referred to as " including " an element throughout the description, it is to be understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. In addition, "... "... Module " or the like means a unit for processing at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

In addition, it is possible to omit general or predictable contents in general.

1 to 4, a description will be made of a grounding method system for a distribution line according to an embodiment of the present invention.

FIG. 1 is a perspective view showing an external configuration of a grounding method system of a distribution line according to an embodiment of the present invention in a separated state. FIG. 2 is a perspective view illustrating an internal configuration of a grounding method system of a distribution line according to an embodiment of the present invention. And FIG. 3 is a block diagram showing an electrical configuration of a grounding method system according to an embodiment of the present invention.

As shown in the figure, the grounding method of the distribution line according to an embodiment of the present invention includes a manhole 10, a manhole body 20, a grounding block 30, a manhole cover 40, an accident display device 50, A thermal imaging camera 60, a control unit 70, a wireless communication module 90, and first to fourth connectors 81, 82, 101, and 102.

The manhole (10) has a pipe shape penetrating in the up and down direction, and is embedded in the ground in a state of connecting the upper penetrating area with the ground. That is, the manhole 10 forms an upper portion of the manhole and also has a function of connecting the ground and the ground inside the manhole body 20, so that the operator can control the inside of the manhole body 20 through the manhole 10 I will go in and out.

The manhole body 20 includes an opening 21 formed on the upper surface thereof and connected to a through area of the lower end of the manhole 10 and a plurality of electric wire holes 22 for passing the distribution line 200 formed on the side And the lower portion of the manhole body 20 is opened for connection in a state of passing through the inside of the ground block 30, which will be described later. That is, the manhole body 20 is connected to the lower end of the manhole 10 and is connected to the manhole 10 through a grounding block 30 embedded in the ground and embedded in the ground, Respectively.

The ground block 30 is in the form of a box open at the top to be connected to the inside of the manhole body 20 and is coupled with the open lower end of the manhole body 20, 30 have a plurality of protruding terminals 31 formed on the inner surface thereof for connection of a ground line to the power distribution line 200 passing through the wire hole 22. [ The ground block 30 includes a cover layer 32 for preventing the contact between the outer surface and the manhole main body 20 and the contact between the ground block 30 and the gravel body 20. The material of the cover layer 32 may be corrosion- Conductive and anti-deterioration materials are used.

The present invention is not limited thereto and the cover layer 32 may be formed on the outer surface of the ground block 30 and the outer surface of the ground block 30 ) And the manhole body 20 so as to impart corrosion resistance and conductivity to the ground block 30 and to have deterioration preventing characteristics.

A configuration in which the distribution line 200 passing through the electric wire hole 22 of the manhole main body 20 is grounded through the ground block 30 will be briefly described. And the plurality of medium wire 310 are connected to the neutral wire connection point 320 in common and the ground wire 330 is connected to the neutral wire connection point 320 so that one end of the ground wire 330 is connected to the ground block 30, The plurality of distribution lines 200 passing through the electric wire holes 22 of the manhole body 20 are grounded in the ground.

The manhole cover 40 covers the penetrating area at the upper end of the manhole 10 and serves to cut off the ground inside the manhole 10 and the inside of the manhole body 20 communicating therewith. The manhole cover 40 includes a main cover 41 and an auxiliary cover 42. The main lid 41 is formed in a shape having a rectangular open housing space 41a formed on the top surface thereof to cover the through hole on the upper end of the manhole 10. The main lid 41 is made of an opaque material. The auxiliary lid 42 is coupled to the upper surface of the main lid 41 and covers the receiving space 41a of the main lid 41. The auxiliary lid 42 is formed of a transparent material.

The accident display device 50 is provided in the accommodation space 41a of the main cover 41 and functions to display the fact on the outside when a short circuit of the power distribution line 200 in the manhole body 20 occurs. The accident display device 50 includes a pair of normal and reverse rotation motors 51 and a pair of rollers 52 and a display band 53.

The pair of normal and reverse rotation motors 51 are respectively installed at both ends in the longitudinal direction of the accommodation space 41a formed in the main lid 41 and these normal and reverse rotation motors 51 are simultaneously rotated in the same direction and at the same speed.

The pair of rollers 52 are connected to the driving shafts of the two forward and reverse rotation motors 51 and are rotated in conjunction with the driving of the forward and reverse rotation motors 51. At this time, The normal and reverse rotation motors 51 and 52 are connected to each other via a speed reducer (not shown) so that the rotational power of the forward and reverse rotation motor 51 is transmitted to the roller 52 through the speed reducer Lt; / RTI >

The display band 53 is moved along the pair of rollers 52 to move in the direction of rotation of the rollers 52 from the receiving space 41a of the main lid 41 to the outside of the area exposed through the auxiliary lid 42 A display indicating the occurrence of a short circuit of the power distribution line 200 in the manhole body 20 and identification information of the manhole body 20 are displayed on one side of the display band 53. [

That is, in accordance with the operation of the normal / reverse rotation motor 51 and the rotation of the roller 52 interlocked with the rotation of the normal and reverse rotation motor 51, the display band 53 displays a display indicating that the distribution line 200 is short- A side of which is exposed to the outside via a transparent auxiliary lid 42 or a display indicating a short circuit of the distribution line 200 and a side without identification information of the manhole body 20 are connected to the outside through a transparent auxiliary lid 42 Exposed state. At this time, when a short circuit occurs in the distribution line 200 passing through the electric wire hole 22 of the manhole body 20, the display and the display band 53 on which the identification information of the manhole body 20 is displayed, And the operation of the normal and reverse rotation motor 51, the roller 52, and the display band 53 is progressed so as to be exposed to the outside through the auxiliary lid 42. [

The thermal imaging camera 60 acquires an internal thermal image of the manhole body 20 around the wiring line 200 that is installed inside the manhole body 20 and passes through the electric wire hole 22.

The control unit 70 may be installed in the main cover 41 and stores a normal internal thermal image of the manhole body 20 obtained through the thermal imaging camera 60 as reference data. The control unit 70 receives the thermal image data in the manhole body 20 obtained through the thermal imaging camera 60 in real time and compares and analyzes the thermal image data with the reference data, (200) is short-circuited. The control unit 70 receives a control signal upon detection of a short circuit of the distribution line 200 and outputs the control signal to the normal / reverse rotation motor 51 of the display device 50.

It is common to generate heat at a short-circuited portion or a short-circuited portion of the power distribution line 200.

The first connector (81) is installed in the main lid (41) in a state of being electrically connected to the normal / rotation motor (51).

The second connector 82 is electrically connected to the control unit 70 and is detachable with the first connector 81 so that the control signal of the control unit 70 is transmitted to the first connector 81 in the forward / To the motor (51).

The wireless communication module 90 is installed in the main lid 41 in parallel with the control signal output terminal for the normal and reverse rotation motor 51 of the control unit 70. The wireless communication module 90 is connected to the manhole body 20 ) To the adjacent IP CCTV camera (400) when a short circuit of the power distribution line (200) occurs.

The third connector 101 is installed in the main cover 41 in a state in which the third connector 101 is electrically connected to the wireless communication module 90.

The fourth connector 102 is branched from the connection line between the control unit 70 and the second connector 82 and can be attached to and detached from the third connector 101 and is connected to the control unit 70 To the wireless communication module 90. The wireless communication module 90 transmits the control signal to the wireless communication module 90. [

The IP CCTV camera 400 having received the short circuit information of the distribution line 200 in the manhole body 20 through the wireless communication module 90 is exposed to the outside through the transparent auxiliary lid 42 of the manhole cover 40 The display band 53 and the identification information of the manhole main body 20 to transmit the shooting information to the control room for managing the manhole or the power distribution line.

It is described that the photographing angle value of the IP CCTV camera 400 is preset and stored in advance.

Accordingly, in the situation room, it is possible to promptly confirm the occurrence of a short circuit in the manhole power line and the position of the manhole through the image transmitted and displayed from the IP CCTV camera 400 and take related measures. FIG. 4 is a view illustrating this.

As can be seen from the description of FIGS. 1 to 4, the grounding method of the distribution line according to the present invention can quickly detect the location of a fault and the occurrence of a short circuit when a short circuit occurs in the underground distribution line, Thus, the power failure due to the short-circuit of the underground distribution line can be terminated relatively quickly, thereby greatly improving the user's convenience.

Also, since the manhole for the installation of the underground distribution line serves also as a ground structure, it is very easy to install the conventional long and time-consuming grounding bar for grounding the underground distribution line.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments or constructions. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described above, and all of the equivalents or equivalents of the claims, as well as the claims, will be included in the scope of the present invention.

10: Manhole neck 20: Manhole body
21: Opening hole 22: Wire hole
30: grounding block 31: protruding terminal
32: Cover layer 40: Manhole cover
41: main cover 41a: accommodation space
42: auxiliary lid 50: accident indicator
51: normal / reverse rotation motor 52: roller
53: Display band 60: Thermal camera
70: control unit 81: first connector
82: second connector 90: wireless communication module
101: third connector 102: fourth connector
200: Distribution line 310: Neutral line
320: Neutral line connection point 330: Grounding lead wire
400: IP CCTV Camera

Claims (1)

A manhole which is formed in a pipe shape penetrating in a vertical direction and forms an upper part of the manhole and an upper penetrating area is exposed on the ground;
A manhole main body having an open hole formed on an upper surface connected to a through hole at a lower end of the manhole and having a plurality of electric wire holes for passing through a distribution line,
And an inner wall of the manhole body
A plurality of protruding terminals are formed on the inner surface of the inner surface to connect the ground wire to the power line passing through the outer surface of the manhole body and connected to the lower end of the manhole body, Covering the connection area with the manhole body,
A ground block of a conductive metal material including a cover layer of a corrosion-resistant, conductive, and anti-deterioration function underground;
A main cover of an opaque material which covers a through area of the upper end of the manhole and in which a rectangular open space is formed and an auxiliary lid of transparent material which is coupled to an upper surface of the main lid and covers the accommodation space, ;
And a pair of front and rear windings which are installed at both ends of the accommodation space and are simultaneously rotated in the same direction and at the same speed, A pair of rollers connected to the drive shaft for each of the forward and reverse rotation motors and rotated in conjunction with the driving of the forward and reverse rotation motors and a pair of rollers driven along the rollers, A display for indicating occurrence of a short circuit of the distribution line in the manhole body and identification information of the manhole body are displayed on one surface of the display band,
An infrared camera installed inside the manhole body to obtain an internal thermal image of the manhole body around a wiring line passing through the electric wire hole;
And a controller for receiving the normal thermal image of the manhole body obtained through the thermal imaging camera as reference data and receiving the thermal image data in the manhole body obtained through the thermal camera in real time, And a control unit for outputting a control signal to the normal and reverse rotation motors of the accident display apparatus when the short circuit of the distribution line in the manhole main body is detected through the analysis,
A first connector installed on the main lid in a state of being electrically connected to the forward / reverse rotation motor;
A second connector that is electrically connected to the control unit and detachable from the first connector and transmits a control signal of the control unit to the forward / reverse rotation motor in a state of being coupled to the first connector;
A wireless communication module installed in the main lid in parallel with a control signal output terminal of the control unit to wirelessly output the fact to an adjacent IP CCTV camera when a short circuit of the power line in the manhole body occurs;
A third connector installed on the main cover in a state of being electrically connected to the wireless communication module;
And a fourth connector that branches off from a connection line between the control unit and the second connector and is detachable from the third connector and transmits a control signal of the control unit to the wireless communication module while being coupled to the third connector, ,
The IP CCTV camera having received the short circuit information of the distribution line in the manhole main body through the wireless communication module displays a short circuit to the distribution line of the display band exposed through the transparent auxiliary lid of the manhole cover and identification information And the photographing information is transmitted to the control room managing the manhole or the power distribution line.
KR1020150111184A 2015-08-06 2015-08-06 Ground system for electric supply line KR101581005B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101881413B1 (en) * 2017-05-01 2018-07-26 우성기업(주) Ground system for electric distribution line
KR102065467B1 (en) * 2019-08-30 2020-01-13 주식회사 이지에버텍 The manhole instrumentation measurement controller having a dual security based on IOT and a prediction diagnosis function
KR102470402B1 (en) * 2022-07-20 2022-11-25 공간정보기술 주식회사 Underground facility integrated management system for QR code

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100047364A (en) * 2008-10-29 2010-05-10 이범진 Electric supply line road ground connection construction work method
KR20120133766A (en) 2011-06-01 2012-12-11 대원전기 주식회사 Method for installing overhead earth wire which severs as distribution line by earthing every utility pole

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100047364A (en) * 2008-10-29 2010-05-10 이범진 Electric supply line road ground connection construction work method
KR101012564B1 (en) 2008-10-29 2011-02-07 이범진 Electric supply line road ground connection construction work method
KR20120133766A (en) 2011-06-01 2012-12-11 대원전기 주식회사 Method for installing overhead earth wire which severs as distribution line by earthing every utility pole

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101881413B1 (en) * 2017-05-01 2018-07-26 우성기업(주) Ground system for electric distribution line
KR102065467B1 (en) * 2019-08-30 2020-01-13 주식회사 이지에버텍 The manhole instrumentation measurement controller having a dual security based on IOT and a prediction diagnosis function
KR102470402B1 (en) * 2022-07-20 2022-11-25 공간정보기술 주식회사 Underground facility integrated management system for QR code

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