• Title/Summary/Keyword: Potential interference

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An Analysis of Potential Interference Effects in the Vicinity of Ground Rod Depending on Frequency of Ground Currents (접지전류의 주파수에 따른 수직 접지전극 주변에서 전위간섭 영향 분석)

  • Lee, Bok-Hee;Cho, Yong-Seung;Choi, Jong-Hyuk;Yang, Soon-Man
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.12
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    • pp.88-93
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    • 2011
  • When the ground current is injected into the adjacent ground electrode, the potential interference is caused between ground electrodes, the ground potential interferences have been largely studied with power frequency fault currents. Many attempts to find the frequency-dependent grounding impedance report that the high frequency grounding impedance is very different with the ground resistance. This paper presents experimental data on the frequency-dependent potential interference effects in the vicinity of ground rod. The ground potential rises around the test ground rod of 4 or 6[m] were measured and discussed. As a result, the ground potential rises and potential interference factor are decreased with decreasing the grounding impedance. It was found that the lowering of grounding impedance is critical to reduce the ground potential interference effects.

Research on Assessment of Potential Interference between Individual Grounding Electrodes Using an Electrolytic Tank Modeling Method

  • Gil, Hyoung-Jun;Kim, Dong-Ook;Choi, Chung-Seog
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.3
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    • pp.27-33
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    • 2008
  • This paper deals with the assessment of potential interference between individual grounding electrodes using an Electrolytic Tank Modeling method. When a test current was passed through a grounding electrode, potential rise was measured and analyzed using an electrolytic tank in real time. In order to analyze the potential interference between grounding electrodes, a reduced scale modeling method was studied. Potential interference between isolated grounding electrodes was evaluated as a function of the separation distance between grounding electrodes and the configuration of grounding electrode to be induced. It was found that the separation distance between grounding electrodes was a major factor in reducing the potential interference.

Potential Interference between the Earth Electrode (접지극의 전위간섭)

  • Kim, Ju-Chan;Kim, Sung-Sam;Koh, Hee-Seog
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.05a
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    • pp.48-52
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    • 2004
  • Recently, there are many electricity, electronics, and communication equipment which need to earthing in the building. When electric current flows into a certain earthing system in the same building, the potential of other earthing system rises. This potential interference repuire surface potential of electrodes by electrode shape. In this paper basic formula is deduced on the basis of both electrodes surface potential of earth electrode as a source of the potential interference and earth electrode which receive the potential interference. The degree of potential interference as multiple earth electrode is verified the simulated results by means of the simple model in advance.

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Potential Interference of Plural Grounding Electrodes (복수접지극의 전위간섭)

  • Kim Ju Chan;Choi Jong Kyu;Lee Chung Sik;Koh Hee Seog
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.27-29
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    • 2004
  • Recently, there are many electricity, electronics, and communication equipment which need to earthing in the building. When electric current flows into a certain earthing system in the same building, the potential of other earthing system rises. This potential interference require surface potential of electrods by electrode shape. In this paper basic formula is deduced on the basis of both electrodes surface potential of earth electrode as a source of the potential interference and earth electrode which receive the potential interference. The degree of potential interference as multiple earth electrode is verified the simulated results by means of the simple model in advance.

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Assessment of Potential Interference between Grounding Electrodes Using ETM Method (ETM 기법을 이용한 접지전극의 전위간섭 평가)

  • Gil, Hyoung-Jun;Kim, Dong-Ook;Kim, Dong-Woo;Lee, Ki-Yeon;Choi, Chung-Seog
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2007.11a
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    • pp.333-336
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    • 2007
  • This paper deals with assessment of potential interference between grounding electrodes using ETM(Electrolytic Tank Modeling) method. When a test current flowed through grounding electrode, potential rise was measured and analyzed using an electrolytic tank in real time. In order to analyze the potential interference between grounding electrodes, ETM method was studies. Potential interference between isolated grounding electrodes was evaluated as functions of the separation distance between grounding electrodes and the configuration of grounding electrode to be induced. It was found that the separation distance between grounding electrodes in reducing the potential interference was a major factor.

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The Potential Interference of the Grounding Grids (격자형 접지전극의 전위간섭)

  • Lee, Bok-Hee;Lee, Tae-Hyung;Lee, Su-Bong;Jung, Hyun-Uk;Gil, Hyoung-Jun
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2005.11a
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    • pp.261-263
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    • 2005
  • This paper presents the potential interferences between various grounding electrodes. The ground potential rise and potential interference coefficient between grounding grid and ground rod were calculated. The potential rise and potential interference coefficient strongly depend on the distance between grounding electrodes.

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The Potential Interference between Ground Rod and Counterpoise (봉상 접지전극-수평매설 접지전극 상호간의 전위간섭)

  • Lee, Bok-Hee;Lee, Su-Bong;Jeong, Dong-Cheol
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2006.05a
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    • pp.351-354
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    • 2006
  • This paper deals with the potential interferences between ground rod and counterpoise. The ground potential rise and coefficient of potential interference were measured by using the hemispherical water tank grounding simulator and calculated from CDEGS program as functions of the configuration and size of grounding electrodes and the distance between grounding electrodes. The ground potential un and potential interference coefficient strongly depend on the distance between grounding electrodes, the arrangement and size of grounding electrodes.

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Potential Interference of Electric Equipments on Radio Service below 30MHz (30MHz 이하 무선 서비스에 대한 전자기기의 잠재적 간섭 영향)

  • Yun, Hye-Ju;Lee, Il-Kyoo
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.13 no.2
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    • pp.269-273
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    • 2013
  • This paper analyzed a potential interference of electric equipments on radio service below 30MHz through an experiment with a PDP(Plasma Display Panel) TV and a RF(Radio Frequency) light bulb in an anechoic chamber. The radiation levels of the PDP TV and the RF light bulb are measured and a combined interference is calculated on the basis of the experimental value. As a result, the combined interference signal level is increased according to the number of interferer. The possibility of a potential interference from electric equipments on radio service below 30MHz is realized through comparison between the measured radiation value of electric equipments and the CISPR(International Special Committee on Radio Interference) 11 limit.

Research on Grounding Resistance for the Grounding Plate Electrodes (각판상전극의 접지저항에 관한 연구)

  • Koh, Hee-Seog;Shin, Su-Han;Kim, Ju-Chan;Choi, Jong-Gyu
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.11a
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    • pp.111-114
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    • 2004
  • There are many electricity, electronics, and communication equipment which need to Grounding in the building. When electric current flows into a certain Grounding system in the same building, the potential of other Grounding system rises. This potential interference repuire surface potential of electrods by electrode shape. In this paper basic formula is deduced on the basis of both electrodes surface potential of Grounding electrode as a source of the potential interference and Grounding electrode which receive the potential interference. The degree of potential interference as multiple Grounding electrode is verified the simulated results by means of the simple model in advance.

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Interference Coefficient of X axis for Electrodes using Variation of Plural Earth Electrodes (복수접지극의 변화에 따른 전극의 X축 간섭계수)

  • Kim Sung Sam;Kim Ju Chan;Song Won Pyo;Koh Hee Seog
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.449-451
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    • 2004
  • In the building, there are a lot of electricity, electrodes, and communication equipment. Many of those equipment needs to earthing. Naturally, the earth electrodes are constructed in the site of a building. In such a situation, when electric current flows into a certain earthing system the potential of other earthing systems rises. That is, the potential interference will take place between the earth electrodes. The conventional study has been considered by only the relation of the distance between the earth electrodes using the potential distribution formula of earth surface. However, it is necessary to inquire strictly, taking the surface potential of electrodes by electrode form into consideration. In this paper, basic formula is deduced on the basis of both electrodes surface potential of earth electrode as a source of the potential interference and earth electrode which receives the potential interference.

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