摘要
本文基于电子线路的多级过电压保护装置的设计原则，提出了把低通滤波器件和限幅器件组合在一起的组合防雷系统，并采用电磁暂态计算程序 EMTP分析了低通滤波器元件参数对保护性能的影响和其幅频特性。同时，本文还提出了过电压冲击自动报警与计数系统设计的可行性方案。
On the basis of the divising principles of a multi－ step overvoltage protection of electronic circuit,a protection system combined Low Pass Filter (LPF) with voltage limitr devices is analyzed in this paper. The effects of LPF to the overvoltage protection function and its Range－ Frecrency Characteristic are analyzed by Electro－ Magnetic Transient Program. Furthermore, an automatic alarming and calculating system of overvoltage pulse is suggested.
关键词
多级保护
过电压保护
低通滤波器
电子设备
电子线路
multi－ step protection circuit
electromagnetic transient calculation
Low Pass Filter
automatic alarming and calculating system
