2017DIN EN 61869-6:2017 Instrument transformers - Part 6: Additional general requirements for low-power instrument transformers (IEC 61869-6:2016); German version EN 61869-6:2016
2000DIN EN 60044-7:2000 Instrument transformers - Part 7: Electronic voltage transformers (IEC 60044-7:1999); German version EN 60444-7:2000