General earthing forms of low voltage electric systems stipulated by IEC are analyzed and calculated, unsafe factors in these systems are presented, and some corresponding measures that should be taken in engineering applications are suggested.

• 对国际电工委员会(IEC)规定的几种常见低压配电系统接地型式进行了分析计算,指出了各系统存在的不安全因素,并提出了工程应用中应采取的相应措施。