配电网系统与用户接地的安全技术要求

Safety Technical Requirements of Distribution Network System and User Grounding

就配电低压网最重要的人身安全保护——接地保护进行了探讨,对一些教材的不足进行了补充并进行了论证。侧重于实际问题,给出解决办法。讨论了安全接地三大系统TN、TT、IT的技术问题;重点针对前二大系统进行论述,以解决当前一些电气工作者(尤其是农电工)在实际工作中存在的如什么情况下必须采用什么系统,如何实现正确"接线"、"接地"的问题。以安全与技术要求回答了为什么标准化小区应采用TN系统而乡村应采用丌系统,同时对以上两系统给出了标准化的、实际的现场接线方框图。全文的论点、论据充分依据国家标准与行业规范和民规,突出重点和论述清晰。

The most important personal safety protection of distribution low voltage network-grounding protection is discussed,and it is a supplement to some problems of the teaching material.Focus on the practical problems and give solutions.The safety grounding of three systems which the technical issues of TN,TT,IT are discussed;focuses on TN,TT,to solve the current electrical workers(especially rural electrician) problems which the existing of many such as what must the system,how to realize the correct 'wiring' and 'ground' in practical work.It takes the security and technical requirements to answer why the standardization of the district should adopt the TN system and the country should adopt the TT system,at the same time,the above two systems are given on-site wiring block diagram.The full text of the argument,the argument is based on the national standards and industry norms and rules,to focus and clarity of discussion.