engleski

Correction of Resistance Measurement of Large Grounding Systems

A method for the systematic error correction which appears at the grounding system resistance measurement by means of an auxiliary current electrode, when the distance between the edge of the groundung system and the center of the current electrode is shorter than the minimum distance required by the standard, is presented in this paper. The systematic error increases with the ratio of the size of the grounding system to its distance from the current electrode. The method for the correction of the systematic error is based on modeling of grounding system and current electrode by hemispheres in uniform and two-layer soil model. The calculation results are presented by diagrams, which are useful for the evaluation of systematic error.

resistance measurements; grounding systems

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