Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Comparison of the Earth Resistivity Measured by the 3-Electrode and 4-Electrode Fall-of-Potential Methods

3전극과 4전극 전위강하법으로 측정한 대지저항률의 비교

  • 이복희 (인하대학교 IT공대 전기공학부) ;
  • 김기복 (인하대 대학원 전기공학과)
  • Received : 2012.12.13
  • Accepted : 2013.01.18
  • Published : 2013.02.28
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Abstract

This paper presents the comparison of the earth resistivity obtained from the measurements made with the three-electrode and four-electrode fall-of-potential techniques. The ${\rho}-a$ curve obtained from Wenner four-electrode method in undisturbed earth is in good agreement with the ${\rho}-l$ curve obtained from the three-electrode method based on the fall-of- potential method. However, The ${\rho}-a$ curve in disturbed earth with moisture and freezing is significantly different with the ${\rho}-l$ curve. The ${\rho}-a$ curve is considerably sensitive to the freezing and the moisture present in the earth surface compared to the ${\rho}-l$ curve. Thus to determine the actual earth resistivity, it is necessary to take into account the earth surface conditions when measuring the earth resistivity.

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References

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