塔式起重机现场TN-S系统的应用

The tower crane Field application of the TN-S system

根据国际电工委员(ICE)我国低压配电系统按接地方式的不同分为三类,即TT系统、TN系统和IT系统,其中以TN系统最为普遍。在TN系统中又根据其保护零线是否与工作零线分开分为TN-C、TN-S、TN-C-S系统。文章讨论了塔式起重机现场TN-S系统的细节研究以及塔式起重机安全用电的几条措施。

According to the international electrotechnical commission （ICE） low voltage system in our country can be divided into three kinds, namely ＇IT system, TN system and IT system by the different grounding mode, among them TN system are widely used. TN system is divided into TN - C system, TN - S system, TN - C - S system by whether Protection zero line and Work zero line is separated.This paper discussed the tower crane field TN - S system of normative research and several measures of safety power in using tower crane.