2025版防雷接地计算器（功能强大）VIP免费

最 低 效 的 接ρrR100500.31830995001000.795774710001001.5915494长宽厚度面积电阻率埋深接地电阻值与地表齐平的均匀土壤中半球接地电阻公式（3-1）ρ——土壤电阻率，Ω·mr ——半球半径，m长、宽、高分别为a、b、c的长方形接地极，埋深为h，其接地电阻计算式为：rR2abcsρhR0.50.40.060.210.864170.30.697343370.50.40.060.210.864170.40.6310288110.50.40.060.210.864170.50.5912400750.50.40.060.210.864170.60.5647142510.50.40.060.210.864170.70.5457672340.50.40.060.210.864170.80.5315569710.50.40.060.210.864170.90.5205045450.50.40.060.210.8641710.511662603R0最 低 效 的 接 地 型 式ρrρS1500036104.166673000201629.606764500050251000100014.012478100050550010022.155673与地表齐平的均匀土壤中圆盘接地电阻公式（3-2）也可近似计算面积相当的平板接地电阻值ρ——土壤电阻率，Ω·mS——圆盘面积，m2r ——圆盘半径或者与接地网面积S等值的圆半径，mR1R2深为h，其接地长为l，直径为d的圆柱形接地极埋深为h，其接地电阻为:rRSR4421或电阻率直径长埋深ρdlhk1000.150.60.99981000.1100.60.999951000.1200.60.9999871000.0550.60.999951000.05100.60.9999871000.05200.60.99999710000.1500.60.99999810000.11000.60.99999910000.11500.6110000.05500.60.99999910000.051000.6110000.051500.61电阻公式（3-2）也接地电阻值面积S等值的圆半径，m埋深为h，其接地电阻计算式接地电阻值R16.6058459.551366065.4002744119.102732110.80054886.0249757224.904372313.7016619.6217088327.403321914.951147810.4547017ρldR20001000.0132.753391000500.0130.5470410001000.0116.376710001500.0111.348011000500.0525.4240410001000.0513.815210001500.059.640343不等边角钢，相关参数同上ldRρ1000.0132.753392000 R ——垂直接地极的接地电阻，Ω ρ——土壤电阻率，Ω·m； l——垂直接地极的长度，m； d——接地极用圆钢时，圆钢的直径，m［当用钢管，d=d1；扁钢，d=0.5b；等边角钢，d=0.84b；据接地电阻阻值反推土壤电阻率计算式推计算式422211 2.0 71bb b bd)18(ln2dllR18ln2dllR地电阻，Ω圆钢的直径，m［当用其他型式钢材时，其等效直径应按下式计算：ρldhAR100210.010.1-0.69.395296100290.010.1-0.67.157772100510.010.1-0.64.42245100660.010.1-0....