IEC 62271的本部分适用于根据IEC 62271-213设计插入电压检测和指示系统（VDIS）测试点的相位比较器，以给出相位比较结果的指示。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 phase comparators designed to be plugged into the testing points of a voltage detecting and indicating system (VDIS) according to IEC 62271-213, to give an indication of the result of a phase comparison.All current amendments available at time of purchase are included with the purchase of this document.