信息系统防雷工程中降低N-PE电压的常用方法

Common Methods for Reducing N-PE Voltage for Lightning Protection Engineering of Information Systems

针对信息系统防雷工作中经常出现电源N-PE(中性线与保护地)电压过大而影响设备正常工作的情况,分析了N-PE电压产生的机理,它们是纯电阻引起的N-PE电压、地电路环路引起的N-PE电压和公共阻抗干扰引起的N-PE电压;分讨论了引起N-PE电压的常见原因以及降低N-PE电压的常用方法。

An analysis is made of the mechanisms of high N-PE voltage formation, which are induced by pure resistance, earth circuit loop, and common impedance, in connection with the common faults resulted from high N-PE （neutral and protected earth conductor） voltage encountered in the operational lightning protection for the information system. The common causes for high N-PE voltage and the methods for reducing N-PE voltage are also discussed.