IEC TR 60146-1-2:20 19作为IEC TR 60146-1-2:20 19 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 TR 60146-1-2:20 19对IEC 60146-1-1:20 09中给出的规范的变更提供了指导，以便能够在特殊情况下以受控的形式扩展规范。还提供了技术要点的背景信息，便于使用IEC 60146-1-1:20 09。本技术报告主要涵盖线路换向转换器，其本身不是规范，除非涉及某些辅助部件，因为现有标准可能无法提供必要的数据。与上一版相比，第五版包括以下重大技术变更:a)增加关于换流变压器和过流保护熔断器应用的附件； b)与感应电压调节相关的计算方法的变更以及变压器损耗描述的变更，以符合最新的变压器标准； c)根据最新信息添加和更新参考文献。

IEC TR 60146-1-2:2019 is available as IEC TR 60146-1-2:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC TR 60146-1-2:2019 gives guidance on variations to the specifications given in IEC 60146-1-1:2009 to enable the specification to be extended in a controlled form for special cases. Background information is also given on technical points, which facilitates the use of IEC 60146-1-1:2009. This technical report primarily covers line commutated converters and is not in itself a specification, except as regards certain auxiliary components, in so far as existing standards may not provide the necessary data. This fifth edition includes the following significant technical changes with respect to the previous edition:
a) addition of annexes concerning the applications of converter transformers and of fuses for overcurrent protection;
b) changes of calculation methods related the inductive voltage regulation and changes of description on transformer losses to be consistent with the latest transformer standards;
c) addition and updates of references based on the latest information.