供电系统中电涌保护器的设置和选用

Establishment and Selection of Surge Protector in Power Supply System

电涌保护是对重要的电气装置及信息系统的设备进行保护,防止大气过电压和操作过电压,防闪电击中设防雷装置的建筑物或附近电源进线处等电源连接和防雷击电磁脉冲。明确了各类情况下耐冲击电压类别和耐冲击电压时额定值,阐述了电涌保护器(SPD)在电气系统中的设置及电压保护水平、通流能力、选择方法及多套SPD之间的协调配合。

The surge protection protects the important electric installation and the information system equip- ment, prevents the atmospheric overvoltage and the switching surge, guards against the lightning to hit suppose the antimine device the building or neighbour the power source coil in place and so on the power source con- nections and guardagainst the thunderstroke electromagnetic pulse the protection. It＇ s clear about in each kind of situation to bear the striking potential category and bore when the striking potential the rated value. The surge protector （SPD） in the electrical system establishment and the voltage protection level, passing current ability, the choice method and wraping between SPD the sychromesh are expounded.