Compatibility of Different Grounding Modes of Low -voltage Distribution System

LING Zhimin（CCDI Group，Shenzhen 518057，Guangdong Province，China）

 

    Abstract：The compatibility of different grounding modes of the low-voltage distribution system in a same power supply range is analyzed and discussed，and the following opinions are put forward：in a same power supply range，when the grounding types on the mains side of the different grounding modes are same，they can coexist or is compatible，such as“TN system + local TT system”；when the grounding types on the mains side of the different grounding modes are different，they cannot coexist or is incompatible；only after“separately derived system”is taken，they can coexist or is compatible.

    Key words：same power supply range；low-voltage distribution system；grounding mode；UPS；working grounding；multiple grounding；isolation transformer；separately derived system

 

    摘 要：就低压配电系统同一供电范围内不同接地方式是否兼容问题展开分析探讨，并提出如下看法：在同一供电范围内，不同的接地方式当其电源侧接地形式相同时，两者是可以共存或兼容的，如“TN系统 + 局部T T系统”；不同的接地方式当其电源侧接地形式不相同时，两者是不可以共存或兼容的；只有采取“另起的系统”措施后，两者才可以共存或兼容。

    关键词：同一供电范围；低压配电系统；接地方式；UPS装置；工作接地；重复接地；隔离变压器；另起的系统

    中图分类号：TU852              文献标识码：A

     doi：10. 3969 / j. issn. 1003 - 8493. 2018. 06. 001