国内专家提问IEC专家 中文版.pdf

国内专家提问IEC专家_中文版PROBLEMS
IEC 60364 - 4 – 41

Protective equipotential bonding 保护等电位联结

According to IEC61140 and IEC 60364-4-41 , shall protective equipotential
bonding be provided for outdoor TN and TT system with automatic disconnection of
supply?
根据 IEC61140 （GB/T17045） 及 IEC 60364-4-41 （），应
为带有自动断电保护的户外 TN 和 TT 系统，提供保护等电位联结吗？

What kind of earthing systems commonly used for external lightings (including street
lighting) in foreign countries?
在国外，外部照明（包括路灯）一般使用哪类接地系统？

The permissible maximum disconnection time 5 s or 1 s for circuits defined by IEC
60364-4-41 and , in case of without protective equipotential
bonding, can it ensure the protection against electric shock?
IEC 60364-4-41（） 和 规定，允许最大断电时间 5 s
或 1 s，在没有保护等电位联结的情况下，能确保防电击吗？

Wherever the steel reinforcement of concrete structures to be considered as external
conductive parts, shall it be welded or it may be wrapped is allowable for protective
equipotential bonding purpose? What about for down conductor of lightning protection
system?
将混凝土结构加强钢筋作为外部可导电部分考虑的任何情况下，应将其作为保护等电位
联结进行焊接或缠绕吗？防雷系统的引下导体是怎样的？

For building floors without steel reinforcement, shall it to be provided additional
protec