本标准适用于拟安装在与额定电压为1000V（均方根[rms]）或以下的50Hz或60Hz交流（ac）电源电路相连的服务设备负载侧的浪涌防护装置（SPD）。为这些设备建立了性能特征和测试和评级的标准方法，这些设备可以由任何组件组合组成。本标准中的试验旨在对各种可用的浪涌保护装置进行比较。

This standard applies to surge-protective devices (SPDs) intended to be installed on the load side of the service equipment connected to 50 Hz or 60 Hz alternating current (ac) power circuits rated at 1000 V (root mean squared [rms]) or less. Performance characteristics and standard methods for testing and rating are established for these devices, which may be composed of any combination of components. The tests in this standard are aimed at providing comparisons among the variety of surge-protective devices available.