IEC 62271-112:2021作为IEC 62271-112:2021 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 62271-112:2021适用于交流高速接地开关（以下简称HSE），设计用于室内和室外安装，并在额定电压为550 kV及以上的系统上以50 Hz和60 Hz的工作频率运行。本文件中描述的HSESs旨在消除断路器清除输电线路上的故障后剩余的二次电弧。有关HSESs的更多详细信息，请参见附录A。这第二版取消并取代了2013年出版的第一版。本版构成技术修订版。与上一版相比，本版包括以下重大技术变更:文件已更新为IEC 62271-1:20 17的第二版。

IEC 62271-112:2021 is available as IEC 62271-112:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62271-112:2021 applies to AC high-speed earthing switches (hereinafter termed HSES) designed for indoor and outdoor installation and for operation at service frequencies of 50 Hz and 60 Hz on systems having rated voltages of 550 kV and above. HSESs described in this document are intended to extinguish the secondary arc remaining after clearing faults on transmission lines by the circuit-breakers. For more detailed information on HSESs, refer to Annex A. This second edition cancels and replaces the first edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: The document has been updated to the second edition of IEC 62271-1:2017.