IEC 61472-2:20 21规定了一种确定1 kV至72.5 kV交流系统带电工作最小接近距离电气分量的方法。本文件涉及系统过电压以及不同电位下设备和/或工人之间的工作空气距离。 只有在以下工作条件占优势的情况下，才能使用本文件中描述的方法确定的耐压和最小接近距离: 工人接受过带电线路或靠近带电导线或设备工作的培训，并精通带电线路或靠近带电导线或设备的工作； 调节操作条件，使得统计过电压不超过为确定所需耐压而选择的值； 瞬态过电压是决定性的过电压；工具绝缘表面没有连续的水分膜； 作业现场10km范围内未观测到雷电； 考虑到工具导电部件的影响。

IEC 61472-2:2021 specifies a method for determining the electrical component of the minimum approach distances for live working, for AC systems 1 kV up to and including 72,5 kV. This document addresses system overvoltages and the working air distances between equipment and/or workers at different potentials.
The withstand voltage and minimum approach distances determined by the method described in this document can be used only if the following working conditions prevail:

• workers are trained for, and skilled in, working live lines or close to live conductors or equipment;
• the operating conditions are adjusted so that the statistical overvoltage does not exceed the value selected for the determination of the required withstand voltage;
• transient overvoltages are the determining overvoltages;
• tool insulation has no continuous film of moisture present on the surface;
• no lightning is observed within 10 km of the work site;
• allowance is made for the effect of the conducting components of tools.