This part of IEC 60044 applies to newly manufactured combined transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz. The requirements and tests of this standard, in addition to th
IEC 60044-3:2002 history
2002IEC 60044-3:2002 Instrument transformers - Part 3: Combined transformers
1980IEC 60044-3:1980 Instrument Transformers Part 3: Combined Transformers (Edition 1.0)
IEC 60044-3:2002 Instrument transformers - Part 3: Combined transformers was changed to IEC 61869-4:2013 Instrument transformers - Part 4: Additional requirements for combined transformers.