【摘要】 采用浪涌保护器(SPD)实现等电位连接并限制过电压到允许的电压等级是雷电电磁脉冲防护技术中的重要方法。由于SPD设计和施工带有多方面的不确定性,使被保护系统可能出现故障,导致SPD保护失效,因此从雷击特性的随机性、组成SPD元器件的击穿时延和分散性、多级保护盲区、雷电波在负载与SPD之间的反射振荡特性等方面进行了分析探讨,最终得出了SPD保护不确定性的必然性。更多还原

【Abstract】 Surge protection devices(SPD) are commonly used against lightning electromagnetic impulse during the lightning strikes.Unfortunately,the surge protection devices are occasionally faulty because of the protection indeterminateness due to the design and installation of SPD.We discussed the random characteristic of lightning strike,the breakdown time delay and jitter of SPD,multi-stages protection blind zone,the reflection oscillation of lightning wave between loads and SPD’s,and proved the indeterminateness of the SPD protection against lightning strike.更多还原