IEC TS 62271-318:2024规定了气体绝缘金属封闭开关设备的要求，其中绝缘至少部分由大气压下除空气以外的绝缘气体或气体混合物获得，适用于额定电压包括或高于100 kV的直流电，用于室内和室外安装。本文件包括使用条件、额定值、设计和施工要求的规则。本文件规定了直流开关设备开发和制造的测试要求和通过型式试验和常规试验的证明标准。 在本文件中，术语“直流GIS”和“直流开关设备”用于“直流气体绝缘金属封闭开关设备”。本规范适用于高压直流输电系统的线路换流换流器（LCC）和电压源换流器。本文件涵盖的直流气体绝缘金属封闭开关设备由单独的组件组成，这些组件旨在直接连接在一起，并且只能以这种方式运行。本文件完成并修订了适用于构成直流气体的各个组件的各种相关文件（如适用）- 绝缘金属封闭开关设备。

IEC TS 62271-318:2024 specifies requirements for gas-insulated metal-enclosed switchgear in which the insulation is obtained, at least partly, by an insulating gas or gas mixture other than air at atmospheric pressure, for direct current of rated voltages including and above 100 kV, for indoor and outdoor installation. This document includes rules for service conditions, ratings, design, and construction requirements. Test requirements and criteria for proof for passing type and routine tests are defined in this document for development and manufacturing of DC switchgear. For the purpose of this document, the terms "DC GIS" and "DC switchgear" are used for "DC gas-insulated metal-enclosed switchgear". This specification is applicable for both Line Commutated Converter (LCC) and Voltage Sourced Converter (VSC) for HVDC systems. The DC gas-insulated metal-enclosed switchgear covered by this document consists of individual components intended to be directly connected together and able to operate only in this manner. This document completes and amends, if applicable, the various relevant documents applying to the individual components constituting DC gas-insulated metal-enclosed switchgear.