本标准定义了连接到低压电源网络的电气和电子设备的抗扰度测试方法和优选测试水平范围，以应对电压骤降、短时中断和电压变化。它适用于每相额定输入电流不超过16 a的电气和电子设备。它不适用于连接直流网络或400 Hz交流网络的电气和电子设备。

This standard defines the immunity test methods and range of preferred test levels for electrical and electronic equipment connected to low voltage power supply networks for voltages dips, short interruptions, and voltage variations. It applies to electrical and electronic equipment having a rated input current not exceeding 16 A per phase. It does not apply to electrical and electronic equipment for connection to d.c. networks or 400 Hz a.c. networks.