The main factors which affect the earth-resista nce are the earth model andparameters where the grounding body is buried. 影响电力系统接地电阻的主要因素是接地体所在土壤的模型及参数。
The resistance must be calculated from the current and the resulting voltage drop using ohm is law. 根据电流和测出的压降值用欧姆定律计算出接地电阻。