KR100521635B1 - Apparatus for searching the principal earth plate - Google Patents
Apparatus for searching the principal earth plate Download PDFInfo
- Publication number
- KR100521635B1 KR100521635B1 KR10-2001-0079529A KR20010079529A KR100521635B1 KR 100521635 B1 KR100521635 B1 KR 100521635B1 KR 20010079529 A KR20010079529 A KR 20010079529A KR 100521635 B1 KR100521635 B1 KR 100521635B1
- Authority
- KR
- South Korea
- Prior art keywords
- ground
- ground electrode
- electrode
- auxiliary
- main
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
본 발명은 낙뢰나 전기의 충격으로부터 인축을 보호하고 전원 수준의 안정화를 통하여 정밀전기설비를 보호할 수 있도록 지표면 하에 설치되는 주접지극의 접지저항이 전기설비기준에 미치지 못하는 접지저항불량이 발생할 때 상기 주접지극을 탐색하기 위한 장치에 관한 것으로서, 상기 주접지극에 전위를 인가하기 위한 전위인가장치와, 지표면의 소정 위치에 타설되고 상기 전위인가장치에 접속되는 제1보조접지극과, 상기 지표면의 소정 위치에 타설되는 제2보조접지극 및 제3보조접지극과, 상기 주접지극과 상기 제2보조접지극 사이의 전위차를 측정하기 위한 제1전압계 및 상기 주접지극과 상기 제3보조접지극 사이의 전위차를 측정하기 위한 제2전압계로 이루어진 것을 특징으로 하므로, 복수개의 보조접지극을 지면에 타입하고 각각의 보조접지극과 주접지극 사이의 전위차를 측정하고 비교함으로써, 설치 위치를 모르는 주접지극을 간편하고 정확하게 탐색하여 주접지극을 찾지 못하였을 때 발생되는 불필요한 인력 및 비용 그리고 시간의 소모를 없애고 또한 접지저항 불량시 신속하고 간편하게 주접지극을 수리하고 보완할 수 있다.The present invention, when the ground resistance of the main earth electrode installed under the ground surface does not meet the electrical equipment standards to protect the shrinkage from lightning or electric shock and to protect the precision electrical equipment through stabilization of the power supply level when the ground resistance failure An apparatus for searching for a main ground electrode, the apparatus comprising: a potential applying device for applying a potential to the main ground electrode; a first auxiliary ground electrode placed at a predetermined position on the ground surface and connected to the potential applying device; and a predetermined position of the ground surface. A first voltmeter for measuring a potential difference between the second auxiliary ground electrode and the third auxiliary ground electrode and the main auxiliary electrode and the second auxiliary ground electrode, and a potential difference between the main and third auxiliary ground electrodes Since it is made of a second voltmeter, a plurality of auxiliary grounding electrodes to the ground type and each auxiliary contact By measuring and comparing the potential difference between the pole and the main earth electrode, it is easy and accurate to search for the main earth electrode that does not know the installation location, eliminating unnecessary manpower, cost, and time caused by not finding the main earth electrode, and also in case of poor ground resistance. The main earth electrode can be repaired and supplemented easily.
Description
본 발명은 접지극의 매설위치를 탐색하기 위한 장치에 관한 것이고, 더 상세하게는 접지저항이 전기설비 기준에 미치지 못하여 접지저항불량을 나타내는 접지극을 재시공 또는 접지저항 저감제 처리 등의 보수작업이 수행하기 위하여 접지극의 매설위치를 탐색하기 위한 장치에 관한 것이다.The present invention relates to a device for searching the buried position of the ground electrode, and more particularly, to perform a repair operation such as re-installation or grounding resistance reducing agent treatment of the grounding electrode showing a ground resistance failure because the grounding resistance does not meet the electrical equipment standards. The present invention relates to a device for searching for a buried position of a ground electrode.
일반적으로, 접지극은 낙뢰나 전기의 충격으로부터 인축을 보호하고 전원 수준의 안정화를 통하여 정밀전기설비를 보호하기 위하여 지표면 하에 설치되는 설비로서, 동판이나 동봉 또는 매쉬라고 하는 접지방식을 사용하고 있다. 접지극은 피뢰도선(예를 들어, 동케이블)을 통하여 지면 위에 설치되어 있는 피뢰침이나, 전기설비에 연결된다. 접지극은 전기설비 각각의 특성에 따라서 접지저항값이 규정되어 있다. In general, the grounding electrode is installed under the ground surface to protect the precision from the lightning strike or electric shock and to protect the precision electrical equipment through the stabilization of the power supply level, using a grounding method called copper plate, copper rod or mesh. The grounding electrode is connected to a lightning rod installed on the ground or an electrical installation via a lightning conductor wire (for example, a copper cable). The grounding electrode has a ground resistance value according to the characteristics of each electrical installation.
그러나, 접지극의 접지저항이 전기설비기준(예를 들면, 1종 접지일 경우 접지저항이 10Ω이하가 나와야 정상임)에 미치지 못할 경우, 즉 접지저항이 불량인 경우에는 상술된 바와 같은 접지극의 설치 목적을 달성할 수 없게된다. 이러한 경우에는 접지극과 피뢰도선의 접속부위의 점검 및 접지저항을 저감시키기 위한 저감제 처리 등의 수리가 필요하였다. However, if the grounding resistance of the grounding electrode does not meet the electrical equipment standard (for example, when the grounding resistance is less than or equal to 10 kV for a type 1 grounding), that is, the grounding resistance is bad, the grounding electrode as described above is installed. You will not be able to achieve your purpose. In such a case, it is necessary to check the connection area between the ground electrode and the lightning conductor and repair the reducing agent to reduce the ground resistance.
그러나, 현재까지의 기술로는 접지저항 측정방법 및 접지설비 시공에 대한 기술만이 개발되어 있을 뿐 접지극의 위치를 탐색하기 위한 기술은 개발되어 있지 않은 실정이다. 즉, 종래에는 접지극 설치방법 및 접지극 형상에 관한 기술과, 접지저항 측정방법에 대한 기술과, 대지 저항률 측정방법 및 기술 등이 개시되어 있을 뿐 이미 설치되어 있는 접지극의 위치를 탐색하기 위한 기술은 전혀 개시되고 있지 않은 실정이다.However, to date, only technologies for measuring ground resistance and construction of grounding facilities have been developed, but no technology for searching for the position of the ground electrode has been developed. That is, in the related art, there is disclosed a technique for installing a ground electrode and a shape of a ground electrode, a technique for measuring a ground resistance, a method for measuring earth resistivity, a technique, and the like, but there is no technique for searching for a location of an already installed ground electrode. It is not disclosed.
따라서, 상술된 바와 같이 접지저항불량이 발생하는 경우에는, 접지극의 시공기준에 따라 지표하 750㎜ 이하에 이미 설치되어있는 접지극의 위치를 파악할 수 없다. 또한, 접지극 위치에 대한 도면이 없는 경우에는 접지극의 위치파악이 불가능하여 접지극을 수리할 수 없으므로, 기존에 시공 되어있는 접지극은 무시한 채로 새로운 접지극을 재시공하게 된다.Therefore, when the ground resistance defect occurs as described above, it is not possible to grasp the position of the ground electrode which is already provided below the ground surface of 750 mm according to the construction standard of the ground electrode. In addition, if there is no drawing on the position of the ground electrode, the ground electrode cannot be repaired because the position of the ground electrode is impossible, and thus, a new ground electrode is rebuilt while ignoring the existing ground electrode.
접지극의 수리 및 재시공 작업에 따른 접지설비 정상화 시간이 지연될 뿐만 아니라 인력 및 비용이 많이 소모되는 문제점이 야기된다. In addition to the delay of the grounding facility normalization time due to the repair and reconstruction of the grounding electrode, the manpower and the cost are consumed.
본 발명은 상기된 바와 같은 종래의 문제점을 해결하기 위하여 안출된 것으로, 접지극의 접지저항이 전기설비기준에 미치지 못하여 접지저항불량이 발생하는 경우에 새로운 접지극을 시공하지 않고 기존에 시공되어 있는 접지극의 위치를 탐색하기 위한 방법을 제공하는 데 그 목적이 있다. The present invention has been made to solve the conventional problems as described above, when the grounding resistance of the grounding electrode does not meet the electrical equipment standards, if the grounding resistance is poor, the construction of the existing grounding electrode without constructing a new grounding electrode Its purpose is to provide a method for locating a location.
상기 목적을 달성하기 위하여, 본 발명에 따르면, 낙뢰나 전기의 충격으로부터 인축을 보호하고 전원 수준의 안정화를 통하여 정밀전기설비를 보호할 수 있도록 지표면 하에 설치되는 주접지극의 접지저항이 전기설비기준에 미치지 못하는 접지저항불량이 발생할 때 상기 주접지극을 탐색하기 위한 장치는 상기 주접지극에 전위를 인가하기 위한 전위인가장치와, 지표면의 소정 위치에 타설되고 상기 전위인가장치에 접속되는 제1보조접지극과, 상기 지표면의 소정 위치에 타설되는 제2보조접지극 및 제3보조접지극과, 상기 주접지극과 상기 제2보조접지극 사이의 전위차를 측정하기 위한 제1전압계 및 상기 주접지극과 상기 제3보조접지극 사이의 전위차를 측정하기 위한 제2전압계로 이루어진 것을 특징으로 한다.In order to achieve the above object, according to the present invention, the ground resistance of the main ground electrode installed under the ground surface to protect the precision electrical equipment through the stabilization of the power level and to protect the shrinkage from lightning or electric shock to the electrical equipment standards The apparatus for searching for the main ground electrode when a poor ground resistance failure occurs is provided with a potential applying device for applying a potential to the main ground electrode, a first auxiliary ground electrode placed at a predetermined position on the ground surface and connected to the potential applying device. And a second voltmeter and a third auxiliary ground electrode which are placed at a predetermined position on the ground surface, a first voltmeter for measuring a potential difference between the main ground electrode and the second auxiliary ground electrode, and between the main ground electrode and the third auxiliary ground electrode. And a second voltmeter for measuring a potential difference of.
이하, 첨부도면을 참조하여 본 발명의 바람직한 실시예를 설명한다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.
본 발명에 따르면, 접지극의 접지저항이 전기설비기준에 미치지 못하여 접지저항불량이 발생하는 경우에 기존에 시공되어 있는 주접지극의 위치를 탐색하기 위하여, 주접지극에 전위를 인가하였을 때 상기 주접지극으로부터 멀어질수록 지면에 전위강하가 크게 나타나고, 상기 주접지극에 가까울수록 지면에 전위강하가 적게 나타나는 원리를 이용한다.According to the present invention, when the ground resistance of the ground electrode does not meet the electrical equipment standards, and the ground resistance defect occurs, when the potential is applied to the main ground electrode in order to search for the position of the existing ground electrode, from the main ground electrode As the distance increases, a large potential drop appears on the ground, and the closer to the main ground electrode, the smaller the potential drop appears on the ground.
즉, 도 1a 및 도 1b를 참조하면, 접지극(5)에 전류(I)를 인가하였을 때 접지극(5)으로부터 반경(r)에 위치하는 지표면의 지점에서는 동일전위를 나타낸다. 그리고, 접지극(5)을 중심으로 하여 전위가 방사상으로 거리에 반비례하여 강하되는 것을 나타낸다.That is, referring to FIGS. 1A and 1B, when a current I is applied to the ground electrode 5, the same potential is shown at a point on the ground surface located at a radius r from the ground electrode 5. The electric potential drops radially in inverse proportion to the distance with respect to the ground electrode 5.
본 발명에 따르면, 주접지극을 탐색하기 위한 장치는 도 2에 도시된 바와 같이 주접지극(10)에 전위를 인가하였을 때 주접지극(10)으로부터 소정 거리에 이격된 지점에서 전위강하를 측정하기 위한 전위측정소자를 포함한다. 전위측정소자는 지면에 타입되도록 끝이 뾰족한 제1보조접지극(20), 제2보조접지극(30) 및 제3보조접지극(40)을 갖는다. 보조접지극(20, 30, 40)은 알루미늄이나 동 재질과 같은 전기전도체로 제작되고 약 50㎝ 정도의 길이를 갖는다. 이러한 보조접지극(20, 30, 40)은 지표면 아래 약 30㎝ 정도까지 타입된다.According to the present invention, the apparatus for searching for the main ground electrode is for measuring the potential drop at a point spaced apart from the main ground electrode 10 when a potential is applied to the main ground electrode 10 as shown in FIG. It includes a potential measuring device. The potential measuring element has a first auxiliary ground electrode 20, a second auxiliary ground electrode 30, and a third auxiliary ground electrode 40 having sharp ends to be typed on the ground. The auxiliary ground electrodes 20, 30, and 40 are made of an electrical conductor such as aluminum or copper and have a length of about 50 cm. These auxiliary ground electrodes 20, 30, 40 are typed to about 30 cm below the ground surface.
또한, 접지극 탐색장치는 주접지극(10)에 인가하는 전위의 세기를 조절하는 전위인가장치(50)와, 제2보조접지극(20) 및 제3보조접지극(30)에서 검출되는 전위를 나타내는 제1전압계(60) 및 제2전압계(70)를 포함한다.In addition, the ground electrode searching device includes a potential indicating device 50 that adjusts the strength of the potential applied to the main ground electrode 10, and a potential indicating the potential detected by the second auxiliary ground electrode 20 and the third auxiliary ground electrode 30. FIG. The first voltmeter 60 and the second voltmeter 70 are included.
따라서, 탐색하고자 하는 주접지극(10)의 주위에 보조접지극(20, 30, 40)을 가설한 후 전위인가장치(50)에 의해서 주접지극(10)에 전위를 인가한다. 그리고, 주접지극(10)과 제2보조접지극(20) 및 제3보조접지극(30) 사이의 전위차를 검출한다. 이때, 주접지극과 보조접지극 사이의 전위차는 보조접지극을 이동시키면서 반복해서 수행하여 주접지극의 위치를 검출한다.Therefore, after the auxiliary ground electrodes 20, 30, 40 are hypothesized around the main ground electrode 10 to be searched, the potential is applied to the main ground electrode 10 by the potential applying device 50. Then, the potential difference between the main ground electrode 10, the second auxiliary ground electrode 20, and the third auxiliary ground electrode 30 is detected. At this time, the potential difference between the main ground electrode and the auxiliary ground electrode is repeatedly performed while moving the auxiliary ground electrode to detect the position of the main ground electrode.
이하, 본 발명에 따른 주접지극 탐색장치의 작동에 대하여 설명한다.Hereinafter, the operation of the main ground electrode searching device according to the present invention will be described.
접지극의 접지저항이 전기설비기준에 미치지 못하여 접지저항불량이 발생할 때 시공되어 있는 주접지극(10)의 위치를 탐색하기 위하여, 먼저 세개의 보조접지극(20, 30, 40)을 임의의 지면에 소정 깊이, 예를 들어 약 30㎝ 정도의 깊이로 타입한다. 그리고, 지상에 설치되어 있는 주접지극(10)의 접지저항측정용 터미날 박스의 접지부스바(7)와 제1보조접지극(20)에 가설도선, 예를 들어 케이블(가)을 통해서 전위인가장치(50)로부터 교류전원을 인가한다. In order to search for the position of the main ground electrode 10 which is constructed when the ground resistance of the ground electrode does not meet the electrical equipment standard and the ground resistance is poor, first, three auxiliary ground electrodes 20, 30, and 40 are predetermined on any ground. Type to depth, for example about 30 cm. Then, the potential applying device is connected to the ground bus bar 7 and the first auxiliary ground electrode 20 of the terminal box for measuring the ground resistance of the main ground electrode 10 installed on the ground through a temporary conductor, for example, a cable. Apply an AC power supply from (50).
다른 두개의 보조접지극(30, 40)에 상술된 전위강하원리에 의하여 각각 발생되는 전위차를 검출하기 위한 전압계(60, 70)를 설치하고, 제1전압계(60)와 제2전압계(70)에 의해서 검출되는 전위차를 비교한다. 이와 같은 비교결과에 의해서, 상대적으로 높은 전위차를 나타내는 보조접지극에 인접하여 주접지극(10)이 위치하고 있음을 판단한다. 예를 들어 제1전압계(60)에 의해서 검출된 전위차에 비하여 제2전압계(70)에 의해서 검출된 전위차가 상대적으로 높게 나타나면, 주접지극(10)은 제3보조접지극(40)에 인접하여 매설되어 있음을 판단한다.In the other two auxiliary grounding electrodes 30 and 40, voltmeters 60 and 70 for detecting the potential difference respectively generated by the above-described potential drop principle are provided, and in the first voltmeter 60 and the second voltmeter 70, respectively. The potential difference detected by the result is compared. Based on the comparison result, it is determined that the main ground electrode 10 is located adjacent to the auxiliary ground electrode having a relatively high potential difference. For example, when the potential difference detected by the second voltmeter 70 is relatively higher than the potential difference detected by the first voltmeter 60, the main ground electrode 10 is buried adjacent to the third auxiliary ground electrode 40. Judging.
이와 같은 판단 하에서, 제2보조접지극(30)을 제3보조접지극(40)의 전방으로 이동시켜서 상술된 바와 같은 방식으로 전위차를 검출하고 비교하여 주접지극(10)의 위치에 접근한다.Under this judgment, the second auxiliary ground electrode 30 is moved forward of the third auxiliary ground electrode 40 to detect and compare the potential difference in the manner described above to approach the position of the main ground electrode 10.
그리고, 두 번째 전위차 검출작업시 전압계(60, 70)에 의해서 검출된 전위차를 측정하고, 이와 같이 측정된 제2전위차는 첫번째 전위차 검출작업시 측정된 제1전위차와 비교하여 상대적으로 높은 전위차를 나타내는 지점이 주접지극(10)에 근접하였음을 판단한다.In addition, the potential difference detected by the voltmeters 60 and 70 is measured during the second potential difference detection operation, and the second potential difference measured as described above represents a relatively high potential difference compared to the first potential difference measured during the first potential difference detection operation. It is determined that the point is close to the main ground electrode 10.
이하, 도 3을 참조하면, 제1보조접지극(20)을 지표면에 50㎝ 정도로 타입하고 전위인가장치(50)에 결선한다. 이때, 전위인가장치(50)는 접지저항 측정용 테스트 터니말박스의 접지부스바를 통하여 지표면에 매설되어 있는 주접지극(10)에 결선된다. 제1보조접지극(20)으로부터 5m 정도 떨어진 지표면의 임의의 위치에 제2보조접지극(30)을 타입하고 제2보조접지극(30)으로부터 5m 정도 떨어진 지표면의 임의의 위치에 제3보조접지극(40)을 타입한다. 그리고, 케이블을 이용해서 제2보조접지극(30)과 제3보조접지극(40)을 접지저항 측정용 테스트 터니말박스의 접지부스바를 통하여 주접지극(10)에 결선시키고, 상기 케이블에는 제1전압계(60)와 제2전압계(70)를 각각 설치한다.Hereinafter, referring to FIG. 3, the first auxiliary ground electrode 20 is about 50 cm on the ground surface and connected to the potential applying device 50. At this time, the potential applying device 50 is connected to the main ground electrode 10 embedded in the ground surface through the ground bus bar of the test terminal box for ground resistance measurement. Type the second auxiliary ground electrode 30 at an arbitrary position on the earth surface 5 m away from the first auxiliary ground electrode 20 and the third auxiliary ground electrode 40 at an arbitrary position on the earth surface 5 m away from the second auxiliary ground electrode 30. Type). Then, the second auxiliary ground electrode 30 and the third auxiliary ground electrode 40 are connected to the main ground electrode 10 through the ground bus bar of the test terminal box for measuring the ground resistance using a cable, and the cable includes a first voltmeter 60 and a second voltmeter 70 are provided, respectively.
이 후에, 전위인가장치(50)에 의해서 주접지극(10)에 전위를 인가하면서 전압계(60, 70)를 통하여 보조접지극(30, 40)에서 검출되는 전위강하를 측정한다. 전압계(60, 70)에 의해서 측정되는 전압(V)은 하기 식 1에 의해서 산출된다.Thereafter, the potential drop detected by the auxiliary ground electrodes 30 and 40 through the voltmeters 60 and 70 is measured while the potential is applied to the main ground electrode 10 by the potential applying device 50. The voltage V measured by the voltmeters 60 and 70 is computed by following formula (1).
[식 1][Equation 1]
상기 식 1에서, V는 전압이고, I는 전류이고, r은 주접지극으로부터 이격거리이고, π는 원주율이고, ρ는 대지저항률이다.In Equation 1, V is a voltage, I is a current, r is a distance from the main ground electrode, π is a circumferential rate, and ρ is a ground resistivity.
이때, 대지저항률(ρ)는 하기 식 2로 표현된다.At this time, the earth resistivity ρ is expressed by the following expression (2).
[식 2][Equation 2]
상기 식 2에서, ρ는 대지저항률이고, V는 전압이고, π는 원주율이고, a는 접지극 사이의 거리이다.In Equation 2, ρ is earth resistivity, V is voltage, π is circumference, and a is the distance between ground electrodes.
이때, 가장 높은 전위를 지시하는 보조접지극의 타입위치가 탐색하고자 하는 주접지극(10)에서 가까운 위치가 된다. 제1전압계(60)에 의해서 측정된 제1전위차가 주접지극(10)에 인가되는 전위값에 근사하지 않고 또한 제2전압계(70)에 의해서 측정된 제2전위차가 주접지극(10)에 인가되는 전위값에 근사하지 않으면, 상기 제1전위차와 제2전위차를 비교하여 주접지극(10)의 매설위치의 방향을 결정한다.At this time, the type position of the auxiliary ground electrode indicating the highest potential becomes a position close to the main ground electrode 10 to be searched. The first potential difference measured by the first voltmeter 60 does not approximate the potential value applied to the main ground electrode 10, and the second potential difference measured by the second voltmeter 70 is applied to the main ground electrode 10. If the potential value is not approximated, the direction of the embedding position of the main ground electrode 10 is determined by comparing the first potential difference with the second potential difference.
즉, 제1전위차보다 제2전위차가 크게 나타나면 제3보조접지극(40)이 주접지극(10)에 근접하게 위치하므로 이러한 경우에는 제2보조접지극(30)을 취외한 후 다른 위치에 타입하고 결선한다. 제1전위차보다 제2전위차가 작게 나타나면 제2보조접지극(30)이 주접지극(10)에 근접하게 위치하므로 제3보조접지극(40)을 취외한 후 다른 위치에 타입하고 결선한다. That is, when the second potential difference is greater than the first potential difference, since the third auxiliary ground electrode 40 is located close to the main ground electrode 10, in this case, the second auxiliary ground electrode 30 is removed and then typed and connected to another position. do. If the second potential difference is smaller than the first potential difference, since the second auxiliary ground electrode 30 is located close to the main ground electrode 10, the third auxiliary ground electrode 40 is removed and then connected to another position.
이와 같은 작업을 반복하여 주접지극(10)의 매설위치를 탐색한다.This operation is repeated to search for the embedding position of the main ground electrode 10.
본 발명에 따르면, 복수개의 보조접지극을 지면에 타입하고 각각의 보조접지극과 주접지극 사이의 전위차를 측정하고 비교함으로써, 설치 위치를 모르는 주접지극을 간편하고 정확하게 탐색하여 주접지극을 찾지 못하였을 때 발생되는 불필요한 인력 및 비용 그리고 시간의 소모를 없애고 또한 접지저항 불량시 신속하고 간편하게 주접지극을 수리하고 보완할 수 있다.According to the present invention, when a plurality of auxiliary ground electrodes are typed on the ground and the potential difference between each of the auxiliary ground electrodes and the main ground electrodes is measured and compared, it occurs when the main ground electrode is not found by simply and accurately searching the main ground electrode whose installation position is not known. Eliminating unnecessary manpower, cost and time, and repairing and supplementing the mains poles quickly and easily in case of poor ground resistance.
상기 내용은 본 발명의 바람직한 실시예를 단지 예시한 것으로 본 발명이 속하는 분야의 당업자는 첨부된 청구범위에 기재된 본 발명의 사상 및 요지로부터 벗어나지 않고 본 발명에 대한 수정 및 변경을 가할 수 있다는 것을 인식하여야 한다.The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains recognize that modifications and variations can be made to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. shall.
도 1(a) 및 도 1(b)는 접지극에 전위가 인가되었을 때 지표면에서의 등전위면을 나타내는 도면 및 지표면에서 관찰되는 전위강하를 나타낸 그래프;1 (a) and 1 (b) are diagrams showing an equipotential surface at the ground surface when a potential is applied to the ground electrode and a graph showing the potential drop observed at the ground surface;
도 2는 본 발명에 따른 주접지극 탐색장치를 도시한 도면;2 shows a main ground electrode searching apparatus according to the present invention;
도 3은 본 발명에 따른 주접지극 탐색작업을 나타낸 흐름도.Figure 3 is a flow chart showing a main electrode search operation according to the present invention.
< 도면의 주요부분에 대한 부호의 설명 ><Description of Symbols for Major Parts of Drawings>
10 : 주접지극10: main ground electrode
20, 30, 40 : 보조접지극20, 30, 40: auxiliary earth electrode
50 : 전위인가장치50: potential applying device
60, 70 : 전압계60, 70: voltmeter
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0079529A KR100521635B1 (en) | 2001-12-14 | 2001-12-14 | Apparatus for searching the principal earth plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0079529A KR100521635B1 (en) | 2001-12-14 | 2001-12-14 | Apparatus for searching the principal earth plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20030049340A KR20030049340A (en) | 2003-06-25 |
| KR100521635B1 true KR100521635B1 (en) | 2005-10-12 |
Family
ID=29575152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-2001-0079529A KR100521635B1 (en) | 2001-12-14 | 2001-12-14 | Apparatus for searching the principal earth plate |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100521635B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100609713B1 (en) | 2005-04-27 | 2006-08-08 | 한국전자통신연구원 | Grounding resistance measurement and soil structure detection using the slope degree of voltage differences |
| KR100725857B1 (en) * | 2004-10-30 | 2007-06-08 | 한국전력공사 | The device to measure the ground resistance using the leakage current in the ground conductor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587847A (en) * | 1991-04-02 | 1993-04-06 | Touden Sekkei Kk | Measurement of grounding resistance |
| JPH06213945A (en) * | 1993-01-20 | 1994-08-05 | Chubu Electric Power Co Inc | Device and method for measuring grounding resistance of distribution line |
| KR200169790Y1 (en) * | 1999-09-15 | 2000-02-15 | 정재기 | An instrument for measuring earth resistance of concrete electric-pole |
| KR20000037146A (en) * | 2000-04-10 | 2000-07-05 | 정재기 | A new technical method and equipment for the grounding resistance measurement on power service |
| KR20010025613A (en) * | 2001-01-11 | 2001-04-06 | 정재기 | Grounding Resistance Measurement System for Electric Support Tower on Power Service |
-
2001
- 2001-12-14 KR KR10-2001-0079529A patent/KR100521635B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587847A (en) * | 1991-04-02 | 1993-04-06 | Touden Sekkei Kk | Measurement of grounding resistance |
| JPH06213945A (en) * | 1993-01-20 | 1994-08-05 | Chubu Electric Power Co Inc | Device and method for measuring grounding resistance of distribution line |
| KR200169790Y1 (en) * | 1999-09-15 | 2000-02-15 | 정재기 | An instrument for measuring earth resistance of concrete electric-pole |
| KR20000037146A (en) * | 2000-04-10 | 2000-07-05 | 정재기 | A new technical method and equipment for the grounding resistance measurement on power service |
| KR20010025613A (en) * | 2001-01-11 | 2001-04-06 | 정재기 | Grounding Resistance Measurement System for Electric Support Tower on Power Service |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100725857B1 (en) * | 2004-10-30 | 2007-06-08 | 한국전력공사 | The device to measure the ground resistance using the leakage current in the ground conductor |
| KR100609713B1 (en) | 2005-04-27 | 2006-08-08 | 한국전자통신연구원 | Grounding resistance measurement and soil structure detection using the slope degree of voltage differences |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030049340A (en) | 2003-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109917235B (en) | Method for detecting conductivity defect of cable buffer layer | |
| CN108445363A (en) | A kind of city net cable insulation defect inspection method based on fringe field | |
| CN107290629B (en) | 10KV low-voltage distribution network ground fault positioning method | |
| US20230314532A1 (en) | System and method for detecting a faulty connection in an earth grid | |
| CN111505465B (en) | Method and device for building database, looking up table and positioning local discharge characteristics of winding equipment | |
| Lima et al. | Impulse withstand voltage of single-phase compact distribution line structures considering bare and XLPE-covered cables | |
| EP0437214B1 (en) | Method for diagnosing an insulation deterioration of an electric apparatus | |
| KR100521635B1 (en) | Apparatus for searching the principal earth plate | |
| CN203858320U (en) | Grounding grid corrosion and breakpoint detection system based on threshold value comparison | |
| CN109085407B (en) | Method for measuring electromagnetic influence of overhead transmission line on buried metal pipeline | |
| WO2024023853A1 (en) | System and method for detecting a faulty connection in an earth grid or an equipment | |
| Batalović et al. | Investigation on partial discharge activity inside the cable accessories due to improper installation of power cable joints | |
| JP5086119B2 (en) | Deterioration location method and apparatus for power cable | |
| KR101066617B1 (en) | Method for ground resistance measurement of concrete electric pole | |
| JP2007271542A (en) | Insulation deterioration diagnosis method and insulation deterioration diagnosis device of power cable | |
| CN111650532A (en) | Method for judging grounding point of power transmission line | |
| CN209979776U (en) | Device for positioning fault of underground cable | |
| KR20050048407A (en) | Apparatus for measuring earth resistance | |
| JP4802302B2 (en) | Diagnosis method for water tree deterioration of power cables | |
| KR101358025B1 (en) | Electrical continuity assessment device | |
| Ahmeda et al. | Current and voltage distribution in a horizontal earth electrode under impulse conditions | |
| JPH07294588A (en) | Method for locating insulation failure section of live cable | |
| Arora et al. | Resistivity & Resistance Measurement-Case Studies of Practical Issues & Solutions | |
| JP4951014B2 (en) | Cable status judging apparatus and method | |
| KR102545396B1 (en) | Dielectric loss tangent measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| LAPS | Lapse due to unpaid annual fee |