IEC 62271-211:2024适用于额定电压高于52 kV的气体绝缘金属封闭开关设备(GIS)与变压器装置之间的单相和三相直接连接，以建立电气和机械交换能力并确定变压器连接的电源限制。本第二版取消并取代IEC 62271-211:20 14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)根据IEC 62271-1:20 17对条款进行重新编号， b)第3条:更新关于衬套的定义(3.1)，更新一些压力定义(3.6、3.7、3.8、3.9)，重新措辞关于监测器密度的定义(3.11)，新术语极快前沿过电压(3.12), c)第5条（原第4条）:根据IEC 62271-1:20 17和IEC 62271-203:20 22，增加子条款5.1 General， 1）第5.5款:新的第一款，改写第二款， 2）第5.8款:修改套管的术语“热短时电流的额定持续时间”， d)第6条（原第5条）:子条款的重组和改写: 1）6.1（原5.3）:关于变压器套管气密性和真空密封性的要求 2)6.3（原5.2）:与IEC 62271-203:2022关于SF6、其他气体和气体混合物的典型最大使用压力的协调， 3）6.4（原5.8），重新措辞 4）6.5（原5.1），部分改写和修改 5）6.6（原5.4），部分改写，更新参考文献 6）6.7（原5.5），部分改写 7）6.8（原5.6），部分改写 8)6.9（原5.7），略有改写， e)第7条（原第6条）型式试验:关于参考文献的一些改写和澄清， f)第8条（原第7条）常规试验: 1）8.2（原7.2）:增加一段关于SF6-混合物和SF6以外的其他气体， 2）8.3（原7.3）:根据IEC 62271更新相关现场试验的参考？203:2022, g)第9条开关设备和控制设备选择指南（新）:信息性，参考IEC 62271-203:2022， h)第11条（原第10条）:根据IEC 62271更新标题和更新参考文献？1:2017, i)新的第12条安全和第13条环境方面:增加提及安全和环境方面， j)更正IEC 62271-211:2017勘误表2中的错误， k)修改了图1至图4的方向，以便于阅读表格。

IEC 62271-211:2024 is applicable to single- and three-phase direct connections between gas-insulated metal-enclosed switchgear (GIS) for rated voltages above 52 kV and transformer arrangements to establish electrical and mechanical interchange ability and to determine the limits of supply for the transformer connection. This second edition cancels and replaces the first edition of IEC 62271-211:2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) re-numbering of clauses according to IEC 62271-1:2017,
b) Clause 3: updating definition about bushing (3.1), updating some pressure definitions (3.6, 3.7, 3.8, 3.9), rewording definition about proctor density (3.11), new term very-fast-front overvoltage (3.12),
c) Clause 5 (former clause 4): add a subclause 5.1 General, according to IEC 62271-1:2017 and IEC 62271-203:2022,
1) subclause 5.5: new first paragraph, rewording second paragraph,
2) subclause 5.8: modify the term "Rated duration of thermal short-time current" of the bushing,
d) Clause 6 (former Clause 5): restructure and rewording of subclauses:
1) 6.1 (former 5.3): requirements about gas and vacuum tightness of the transformer bushing
2) 6.3 (former 5.2): harmonization with IEC 62271-203:2022 about typical maximum pressure in service for SF6, other gases and gas mixtures,
3) 6.4 (former 5.8), rewording
4) 6.5 (former 5.1), some rewording and modification
5) 6.6 (former 5.4), some rewording, updated references
6) 6.7 (former 5.5), some rewording
7) 6.8 (former 5.6), some rewording
8) 6.9 (former 5.7), slight rewording,
e) Clause 7 (former clause 6) type tests: some rewording and clarifications about references,
f) Clause 8 (former clause 7) routine tests:
1) 8.2 (former 7.2): add a paragraph about SF6-mixtures and other gases than SF6,
2) 8.3 (former 7.3): update reference to relevant on-site test according to IEC 62271？203:2022,
g) Clause 9 Guide to the selection of switchgear and controlgear (new): informative, to have a reference to IEC 62271-203:2022,
h) Clause 11 (former 10): updated headline and updated reference according to IEC 62271？1:2017,
i) new Clauses 12 Safety and 13 Environmental aspects: Adding of references to safety and environmental aspects,
j) correction of errors in Corrigendum 2 of IEC 62271-211:2017,
k) modified orientation of Figure 1 to Figure 4 for easier reading of the tables.