| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring method of a ground resistance value capable of reducing the influence of an inter-electrode distance to be measured without requiring complicated calculations.SOLUTION: A dummy electrode 4 is placed in the vicinity of a ground electrode 2, and another auxiliary electrode 5 having the same specifications as those of the dummy electrode is placed in the ground, and further, in a first circuit in which a resistor 3 having a known resistance value is connected to the auxiliary electrode 5, a constant AC current is energized between the dummy electrode 4 and the resistor 3, and a generation voltage of an AC current generator 1 and a voltage value excepting a voltage drop amount of the resistor 3 are measured. Further, in a second circuit in which energization of the AC current is changed from the dummy electrode 4 to the ground electrode 2, the AC current is energized between the ground electrode 2 and the resistor 3, and the generation voltage of the AC current generator 1 and the voltage value excepting the voltage drop amount of the resistor 3 are measured. Then, the ground resistance value of the ground electrode 2 is obtained based on the voltage value measured in the two circuits. |
