IEC 62271-203:2022 CMV包含官方标准及其注释版本。注释版本为您提供了一种快速简单的方法来比较IEC 62271-203:20 22版3.0和之前的IEC 62271-203:20 11版2.0之间的所有更改。此外，还提供了IEC SC 17C专家的意见，以解释最相关变更的原因，或澄清内容的任何部分。 IEC 62271-203:2022规定了气体绝缘金属封闭开关设备的要求，其中绝缘至少部分通过大气压下的空气以外的绝缘气体或气体混合物获得，用于额定电压高于52 kV的交流电，用于室内和室外安装，以及用于工作频率高达（包括60 Hz）。这第三版取消并取代了2011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: -该文件已与IEC 62271-1:20 17保持一致； -除SF6外，还在需要时实施了替代气体； -更新了术语和定义，删除了未使用的术语； -更新了第6.16款“气体和真空密封性”； -子条款6.16.3“封闭压力系统”:引入了两类气体: -全球升温潜能值≤1,000 -全球升温潜能值>1,000 GWP>1 000的气体型式试验的气密性要求从每个气室每年0.5%降低到0.1%； -子条款6.108“接口”:定义了连接到GIS的接口的典型最大使用压力； -第7.102至7.108款已进行重组； -更新了第7.107款“接地连接腐蚀试验”； -更新了第7.108款“外壳和辅助设备密封系统的腐蚀试验”； -对附件F“服务连续性”进行了修改，并与CIGRE WG B3.51的建议保持一致。

IEC 62271-203:2022 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 62271-203:2022 edition 3.0 and the previous IEC 62271-203:2011 edition 2.0. Furthermore, comments from IEC SC 17C experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content.

IEC 62271-203:2022 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 alternating current of rated voltages above 52 kV, for indoor and outdoor installation, and for service frequencies up to and including 60 Hz. This third edition cancels and replaces the second edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the document has been aligned with IEC 62271-1:2017;
- beside SF6 also alternative gases have been implemented where needed;
- the terms and definitions have been updated and terms not used have been removed;
- Subclause 6.16 “Gas and vacuum tightness” has been updated;
- Subclause 6.16.3 “Closed pressure systems”: Two classes of gas has been introduced:
- GWP ≤ 1 000
- GWP > 1 000
and the tightness requirements for type tests for gasses with GWP > 1 000 has been reduced from 0,5 % to 0,1 % per year per gas compartment;
- Subclause 6.108 “Interfaces”: Typical maximum pressures in service for interfaces connected to GIS have been defined;
- Subclauses 7.102 through 7.108 have been restructured;
- Subclause 7.107 “Corrosion test on earthing connections” has been updated;
- Subclause 7.108 “Corrosion tests on sealing systems of enclosures and auxiliary equipment” has been updated;
- Annex F ‘Service Continuity’ has been modified and aligned with the recommendations of CIGRE WG B3.51.