计量仪表的防雷方式探讨

Discussion on Lightning Protection of Metering Instrument

由于计量仪表在现场位置分散,而且大多露天安装,因而容易受到雷电的侵袭。针对计量仪表现场安装位置的特点,介绍了仪表防雷的3种主要方法:电磁屏蔽、等电位接地、安装电涌保护器。通过某热电厂防雷的应用案例,表明了选用适当的防雷措施对保护计量仪表的安全、稳定运行具有重要意义。

Because of metering instruments are distributed wildly in site, and most of them are installed outdoor. It is vulnerable to be lightninged. Based on characteristics of measuring instrument on-site installation location, three methods of lightning protection are introduced： electromagnetic shielded, equipotential grounding, and surge protector installation. By the case of lightning protection in thermal power plant, it is indicated selection of appropriate lightning protection is of great importance to protect metering instruments running safely and stably.