针对大多数地区的电网为三相四线制电源中性点接地的系统,笔者在工作当中发现,民用住宅建筑物的进线零线不做重复接地,做的接地形式都是保护接地形式,而非保护接零的形式。经过分析,这样做的原因是进线电网上没有重复接地或重复接地的数量未按国家规范设置,造成三相电 For most regions of the grid for the three-phase four-wire power neutral grounding system, the author found in the work, the civilian residential buildings into the line zero do not repeat the grounding, grounding done in the form of ground protection are protected, Rather than protect the form of access to zero. After analysis, the reason for doing so is that there is no repeated grounding on the incoming power grid or the number of repeated grounding is not set according to the national standard, resulting in three-phase power