接地装置深埋入地的目的是为了减小接地电阻和得到较稳定的接地电阻值。接地装置埋设深度主要是根据土壤电阻率,接地装置的用途以及周围环境等来决定,总的说来不得小于0.3米,一般为0.6～0.8米,但应在冰冻线以下。为了降低接地电阻或减小跨步、接触电压,有时把接地装置深埋1米以上。真正接地装置的电压决定于自己的电场和其镜像的电场,其镜像距地面愈远,即接 The purpose of deep grounding of the grounding device is to reduce the grounding resistance and obtain a more stable grounding resistance value. Grounding device buried depth is mainly determined based on the soil resistivity, the use of grounding devices and the surrounding environment, etc., generally speaking not less than 0.3 meters, generally 0.6 to 0.8 meters, but should be below the freezing line. In order to reduce the grounding resistance or reduce the step and contact voltage, the grounding device is sometimes buried more than 1 meter deep. The voltage of a true grounding device is determined by its own electric field and its mirrored electric field, and the farther it is mirrored from the ground, the