The analytic computational formula for grounding resistance of grounding rods in three-layer soil is derived based on the concept of equivalent soil resistivity.
基于等值土壤电阻率的概念，导出了三层土壤中垂直棒接地电阻解析计算公式。
This paper makes a study on principles of grounding impedance measurement and derives the formula for calculating grounding impedance.
对接地阻抗测量原理进行研究，分析推导出接地阻抗计算公式。
This paper makes a study on principles of grounding impedance measurement and derives the formula for calculating grounding impedance.
采用计算机辅助接地阻抗测量设备 ，可以克服传统的电压降测量法的种种弊端。
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