IEC 62271-200:2021适用于预制金属？封闭式开关设备和控制设备组件设计用于: -交流电； -额定电压在1千伏以上且不超过52千伏（含52千伏）； -工作频率高达并包括60Hz； -室内和室外安装。 该组件可以包括空气绝缘和/或流体填充的隔室。 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: a)条款编号与IEC 62271一致？1:20 17，包括采用第3条的子条款名称； b)在第3条中，增加了“在役”、“正常运行状态”和“正常使用”的具体定义；c)杆式开关设备的内部电弧测试从本文件中删除，因为它现在包含在特定标准IEC 62271中？214:2019; d)给出了接地电路的更精确的描述，包括额定值和测试要求； e)减少型式试验中联锁装置的机械试验次数；给出了型式试验期间施加的力的更精确描述（参见7.102）； f)主电路上的电阻测量仅在连续电流试验前需要（作为常规试验的参考），在该连续电流试验后不再需要。这种删除的基本原理是，这种测量的电阻没有任何意义；由于温升试验刚刚结束，新的温升试验不会给出新的信息； g)IEC 62271-文件中引用了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)对小组委员会类别作了更精确的说明，并附上了说明性流程图(附件D)； j)IAC试验未涵盖的实例从第6条移至第9.103条； k)术语“组件”在条款3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)在适用的情况下，将“金属”替换为“金属”； m)6.105现在被7.7覆盖； n)在IAC测试期间，针对标准4引入了1 s规则，将热气体与发光颗粒作为点火原因； o)附录A中给出了带突起开关设备内部电弧试验的更精确描述。

IEC 62271-200:2021 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.