影响接地电阻的因素分析

Analysis of Factors Influencing Grounding Resistance

接地电阻的大小影响着用电设备操作人员的安全以及设备的正常运行,通过接地电阻的影响因素试验得到了土壤电阻率、接地体长度、接地体截面积、接地体的埋深度以及降阻剂的浓度和接地电阻之间的关系。实验结果显示,接地体周围土壤的电阻率和降阻剂对接地电阻的影响最大,其他因素只是在某一范围内对接地电阻的影响稍大些。

The grounding resistance affects the personnel safety of the operators and the normal operation of the equipment.The effects ofQ(the resistivity of the soil),L(the length of grounding electrode),S(the cross-sectional area of grounding electrode),b(the buried depth of grounding electrode) and c(the concentration of the resistance reducing agent) on R(grounding resistance) are analyzed.The result shows that the resistivity of the soil and the resistance reducing agent largely affects the grounding resistance and other factors influence the grounding resistance just in a certain range.