IEC 61326-2-4:20 20作为IEC 61326-2-4:20 20 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 61326-2-4:20 20为以下设备规定了比IEC 61326-1更详细的测试配置、操作条件和性能标准 -根据IEC 61557-8的绝缘监测； -根据IEC 61557-9进行绝缘故障定位。 这适用于绝缘监测装置和永久或半永久连接到配电系统的绝缘故障定位系统的设备。

IEC 61326-2-4:2020 is available as IEC 61326-2-4:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61326-2-4:2020 specifies more detailed test configurations, operational conditions and performance criteria than IEC 61326-1 for equipment for
- insulation monitoring according to IEC 61557-8;
- insulation fault location according to IEC 61557-9.
This applies to insulation monitoring devices and for equipment for insulation fault location systems permanently or semi-permanently connected to the distribution system.