IEC 62271-200:2021（E）适用于为以下目的设计的预制金属封闭开关设备和控制设备组件: –交流电； –额定电压大于1 kV，小于等于52 kV； –工作频率不超过60 Hz； –室内和室外安装。 该组件可包括空气绝缘和/或充液隔室。 第三版取消并取代2011年出版的第二版。本版为技术修订版。 本版本包括与前一版本相比的以下重大技术变更: a） 与IEC 62271-1:2017一致的条款编号，包括采用第3条的子条款名称； b） 第3条增加了“在用”、“正常运行条件”和“正常使用”的具体定义； c） 杆式开关设备的内部电弧测试不在本文件中，因为具体标准IEC 62271‑214:2019涵盖了该测试； d） 更精确地描述接地电路，包括额定值和测试要求； e） 型式试验减少了联锁装置的机械试验次数；对型式试验期间施加的力进行了更精确的描述（参考7.102）； f） 仅在连续电流测试之前（作为常规测试的参考）需要测量主电路上的电阻，而在该连续电流测试之后不再需要测量。 删除的理由是，测量的阻力没有任何意义；由于温升试验刚刚完成，新的温升试验不会给出新的信息； g） 本文件参考了IEC 62271-100:2021、IEC 62271-103:2021、IEC 62271-105:2021和IEC 62271-106:2021； h） IEC 62271-107:2019和IEC IEEE 62271-37-013:2015也在7.101.2中考虑； i） LSC类别的更精确描述包括解释性流程图（附录D）； j） IAC试验未涵盖的示例从第6条转移至第9.103条； k） 术语“组件”在第3条中定义，并在本文件中用作“金属封闭开关设备和控制设备”的同义词； l） 适用时，“金属”替换为“金属”； m） 6.105现在包含在7.7中； n） 在IAC试验期间，针对标准4引入了1s规则，将热气与发光颗粒作为点火原因； o） 附录a中给出了带有突出物的开关设备内部电弧试验的更精确描述。

IEC 62271-200:2021(E) is applicable to prefabricated metal‑enclosed switchgear and controlgear assemblies designed for: – alternating current; – rated voltages above 1 kV and up to and including 52 kV; – service frequencies up to and including 60 Hz; – indoor and outdoor installation. The assembly can include air-insulated and/or fluid-filled compartments. 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: a) clause numbering aligned with IEC 62271‑1:2017, including the adoption of the subclause names of Clause 3; b) in Clause 3 specific definitions are added for "in service", "normal operating condition" and "normal use"; c) internal arc testing on pole-mounted switchgear is taken out of this document, as it is now covered by the specific standard IEC 62271‑214:2019; d) a more precise description of earthing circuit is given with the inclusion of ratings and test requirements; e) number of mechanical tests on interlocks is reduced for type testing; a more precise description of forces to apply during type testing is given (refer to 7.102); f) resistance measuring on main circuit is only needed before continuous current tests (as reference for routine tests) and no longer needed after this continuous current test. Rationale for this deletion is that this measured resistance does not mean anything; as the temperature rise test was just finished, a new temperature rise test will not give new information; g) IEC 62271-100:2021, IEC 62271-103:2021, IEC 62271-105:2021 and IEC 62271-106:2021 are referred to in the document; h) IEC 62271‑107:2019 and IEC IEEE 62271‑37‑013:2015 are also considered in 7.101.2; i) a more precise description of LSC category is given with the inclusion of an explanatory flowchart (Annex D); j) examples not covered by the IAC test are transferred from Clause 6 to 9.103; k) the term "assembly" is defined in Clause 3 and used as synonym for "metal-enclosed switchgear and controlgear" in this document; l) "metallic" is replaced by "metal" where applicable; m) 6.105 is now covered by 7.7; n) a 1 s rule was introduced for Criterion 4 during IAC tests regarding hot gases versus glowing particles as cause of ignition; o) a more precise description of internal arc tests for switchgear with protrusions is given in Annex A.