IEC 62505-3-3:20 20适用于以下新型电压互感器: -预期用于牵引系统的室内或室外固定装置，以及 -以IEC 60850中规定的交流线电压和频率操作。 在合理可能的范围内，本文件也适用于感应型以外的电压互感器。本文件的要求优先。 第二版取消并取代了2009年出版的第一版。与上一版相比，此版本包括以下重大技术变更: 对本标准进行了修订，以反映所引用标准的最新版本，并删除了IEC 61869系列中已包含的文本。 文件的结构与IEC 62505的结构相适应？1和IEC 62505？2. 增加了额定值，以提供符合其他铁路标准的名称，例如IEC 62497。测试要求已经详细说明，以满足铁路应用的操作条件。 已规定局部放电电压

IEC 62505-3-3:2020 is applicable to new voltage transformers which are:
- intended for use in indoor or outdoor fixed installations in tractions systems, and
- operated with an AC line voltage and frequency as specified in IEC 60850.
This document also applies to voltage transformers other than inductive types as far as reasonably possible. Requirements of this document have priority.
This second edition cancels and replaces the first edition published in 2009. This edition includes the following significant technical changes with respect to the previous edition:
This standard was revised to reflect the latest versions of standards referenced and to remove text already included in the IEC 61869 series.
The structure of the document was adapted to that of IEC 62505？1 and IEC 62505？2.
Ratings have been added to provide designations in line with other railway standards, for example IEC 62497.
Tests requirements have been detailed to meet operating conditions of railway applications.
Partial discharge voltages have been specified