IEC 62271的本部分适用于额定功率的三极交流开关 室内和室外用额定通断电流大于52 kV的电压 户外安装，额定频率不超过60 Hz。 本文件也适用于这些开关的操作装置及其 辅助设备。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This part of IEC 62271 is applicable to three-pole alternating current switches for rated voltages higher than 52 kV, having making and breaking current ratings, for indoor and outdoor installations, and for rated frequencies up to and including 60 Hz. This document is also applicable to the operating devices of these switches and to their auxiliary equipment.All current amendments available at time of purchase are included with the purchase of this document.