文章针对通信系统,以太网交换机最主要的部件就是集成电路(IC),但IC的抗干扰能力比较低,即使是从线路感应过来的雷电电磁脉冲(LEMP),也能把IC元件击穿,所以以太网交换机很容易发生雷击事故。对雷电的防御从预防直击雷上升为对雷电电磁脉冲的预防,因此更加体现出防雷工作的迫切性和复杂性。 The article for the communication system, the most important part of the Ethernet switch is the integrated circuit (IC), but the anti-interference ability of the IC is relatively low, even from the line induced lightning electromagnetic pulse (LEMP), but also the IC components breakdown, Therefore, Ethernet switches are prone to lightning accidents. The defense against thunder and lightning rose from the prevention of direct lightning to the prevention of thunder and lightning electromagnetic pulses, thus further reflecting the urgency and complexity of lightning protection.