IEC 62271-112:2021 RLV包含官方IEC国际标准及其红线版本。红线版本仅提供英文版本，并为您提供了一种快速简便的方法来比较官方IEC标准与其前一版本之间的所有更改。 IEC 62271-112:2021适用于交流高速接地开关（以下简称HSE），其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旨在通过断路器清除输电线路上的故障后，熄灭剩余的二次电弧。有关HSESs的更多详细信息，请参阅附录A。第二版取消并取代2013年发布的第一版。本版为技术修订版。与上一版相比，本版包括以下重大技术变更: 本文件已更新至IEC 62271-1:2017第二版。

IEC 62271-112:2021 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its 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.