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电涌保护器,又称防雷器,浪涌保护器,SPD· 电涌保护器(SPD) surge protective device 用于限制瞬时过电压和泄放电涌电流的电器,它至少包含一个非线性元件.Device that contains at least one nonlinear component that is intended to limit surge voltages and divert surge currents· 工作特点working characteristic A.电力系统无电涌时:SPD不应对其所应用的系统的工作特性有明显影响;If no surge comes, SPD should not influence the system where it is installed.