IEC 62271-109:2019作为IEC 62271-109:2019 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 62271-109:2019适用于交流串联电容器旁路开关，设计用于室外安装，并在电压高于52 kV的系统上以50 Hz和60 Hz的频率运行。它仅适用于三相系统中使用的旁路开关。本文件也适用于旁路开关的操作装置及其辅助设备。本第三版取消并取代了2008年出版的第二版和修正案1:20 13。本版构成技术修订版。与上一版相比，此版本包含以下重大技术变更:a)根据IEC 62271-1 2.0版对文件进行了重组； b)旁路开关两端的额定电压分配已与IEC 60143-1中定义的规则一致； c)对补偿线路和非补偿线路的额定连续电流进行了澄清； d)在失去“适当的预防措施”后已经给出了一些澄清； e)根据IEC 62271-100修正案2，将“额定时间量”部分移至“时间量”下的第6条； f)根据IEC 62271-100修正案2，将“静态机械载荷试验”一节移至“静态机械载荷”下的第6条； g)在脉冲测试期间为真空断路器引入了附加规则； h)关于脉冲测试期间减少的脉冲数量已经给出了额外的澄清； i)在旁路使电流测试占空比期间引入了更宽的电流阻尼容差。

IEC 62271-109:2019 is available as IEC 62271-109:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62271-109:2019 is applicable to AC series capacitor by-pass switches designed for outdoor installation and for operation at frequencies of 50 Hz and 60 Hz on systems having voltages above 52 kV. It is only applicable to by-pass switches for use in three-phase systems. This document is also applicable to the operating devices of by-pass switches and to their auxiliary equipment. This third edition cancels and replaces the second edition published in 2008 and Amendment 1:2013. This edition constitutes a technical revision. This edition contains the following significant technical changes with respect to the previous edition:
a) the document has been restructured according to edition 2.0 of IEC 62271-1;
b) the rated voltage assignation across the by-pass switch has been aligned to the rule defined in IEC 60143-1;
c) clarification has been given regarding rated continuous current of compensated and uncompensated line;
d) some clarifications have been given following a loss of "suitable precautions";
e) as per Amendment 2 of IEC 62271-100, the section "Rated time quantities" has been moved to Clause 6 under "Time quantities";
f) as per Amendment 2 of IEC 62271-100, the section "Test for static mechanical loads" have been moved to Clause 6 under "Static mechanical loads";
g) additional rules have been introduced for vacuum interrupters during impulse tests;
h) additional clarifications have been given regarding the number of reduced impulses during impulse tests;
i) a wider tolerance on the current damping during by-pass making current test-duty has been introduced.