防雷击电磁脉冲的设计

结合一个银行工程，介绍了如何进行防雷击电磁脉冲的设计，分析了SPD的分类和参数以及在各种配电系统中如何选用SPD。讨论了在设计中如何考虑电压保护水平，持续运行电压，通流容量，残余电压，保护模式，响应时间等参数，可维护性和使用寿命等问题，以及SPD的安装方法和要求，包括引线，上下级SPD的级联保护，SPD的间距和保护等问题。

Design of Prevention of the Electromagnetic Impuls for Thunderstruck

In combination with a engineering for bank, the design of prevention of the electromagnetic impuls for thunderstruck and the selection of the surge protective devices (SPD) in the variety of distribution systems were introduced. The classification and parameters of SPD were analyzed and how to thinking about some parameters, such as the level of voltage protection, continual operating voltage, capacity of through current, residual voltage, protective models, response time and maintainability and service life etc. in the design were discussed. The method and requirements in the installation of SPD, including the connection, space and the cascade protection between SPD were discribed.