IEC 62271-202:2022规定了封闭式高压预制变电站的使用条件、额定特性、一般结构要求和试验方法。这些预制变电站通过电缆连接到交流高压网络，工作电压高达52 kV（含52 kV），工频高达60 Hz（含60 Hz）。它们可以从内部（步入式）或从外部（非步入式）手动操作。它们设计用于室外安装在公众可及的位置，并提供人员保护。 这第三版取消并取代了2014年出版的第二版。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更:在适当考虑IEC 62271-1:20 17的情况下审查整个文件内容和结构； 修改标题和范围，以包括高压开关设备预制变电站； 将CEADS作为中低压预制变电站的可能组成部分； 在7.2.101中，现在考虑了周围元件对高压元件（如高压开关设备和控制设备以及非金属封闭或无接地屏蔽的高压互连）介电性能的可能影响； 新的信息性附件G，包含评估太阳辐射对外壳内温度影响的测试程序以及如何应用该测试程序； 新的资料性附件H，以适当考虑电子设备的安装条件； 现将预制变电站的额定功率定义为三-参数额定值。参见5.101.1； 6.104.4中引入了预制变电站通道门的最小尺寸，6.105.3中引入了操作通道自由高度的最小尺寸； 必要时已修订/澄清连续电流（温升）试验方法； 图D.1显示了外壳内矿物油浸没式电力变压器的负载系数，已进行了校正。

IEC 62271-202:2022 specifies the service conditions, rated characteristics, general structural requirements and test methods of enclosed high-voltage prefabricated substations. These prefabricated substations are cable-connected to AC high-voltage networks with an operating voltage up to and including 52 kV and power frequencies up to and including 60 Hz. They can be manually operated from inside (walk-in type) or from outside (non-walk-in type). They are designed for outdoor installation at locations with public accessibility and where protection of personnel is provided.
This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:

1. the whole document contents and structure are reviewed with due consideration of IEC 62271-1:2017;
2. modification of the title and scope to include high-voltage switchgear prefabricated substations;
3. inclusion of CEADS as a possible component of MV/LV prefabricated substation;
4. in 7.2.101, the possible influence of surrounding elements on the dielectric performance of high-voltage components as high-voltage switchgear and controlgear and high-voltage interconnections non-metal-enclosed or without earthed screen are now considered;
5. new informative Annex G with testing procedure to evaluate the impact of solar radiation in temperatures inside the enclosure and how to apply it;
6. new informative Annex H for appropriate consideration of installation conditions of electronic equipment;
7. the rated power of a prefabricated substation is now defined as a three-parameter rated value. See 5.101.1;
8. minimum dimensions for access doors to the prefabricated substation in 6.104.4 and for free height of operation aisle in 6.105.3 have been introduced;
1. continuous current (temperature rise) test methods have been revised/clarified where necessary;
10. Figure D.1, which shows the mineral-oil-immersed power transformer load factor inside the enclosure, has been corrected.