IEC 62271-201:2014规定了室内安装额定电压高于1 kV且不超过52 kV的交流电以及工作频率不超过60 Hz的预制固体绝缘封闭式开关设备和控制设备的要求。第二版取消并取代了2006年出版的第一版。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: a)除了根据IEC 62271-200第二版（2011年发布）进行更新外，还更精确地规定了定义、分类和测试程序； b)现在仅限于授权人员接触固体绝缘封闭式开关设备和控制设备。这意味着整个文档中删除了“B级可访问性”（公共访问）；c)引入术语“防护类别”以取代术语“防护等级”（PA、PB1和PB2）。 本出版物应与IEC 62271-201:2007一起阅读。

IEC 62271-201:2014 specifies requirements for prefabricated solid-insulation enclosed switchgear and controlgear for alternating current of rated voltages above 1 kV and up to and including 52 kV for indoor installation and for service frequencies up to and including 60 Hz. This second edition cancels and replaces the first edition, published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) apart from updating with the second edition of IEC 62271-200 (issued in 2011), definitions, classifications and testing procedures have been specified more precisely;
b) access to the solid-insulation enclosed switchgear and controlgear is now restricted to authorized personnel only. This implies that "accessibility class B" (public access) has been deleted throughout the document;
c) the term "protection category" has been introduced to replace the term "protection grade" (PA, PB1 and PB2).

This publication is to be read in conjunction with IEC 62271-201:2007.