IEC 61869-5:2011

Instrument transformers - Part 5: Additional requirements for capacitor voltage transformers

IEC 61869-1:2007

Instrument transformers - Part 1: General requirements

IEC 60044-8:2002

Instrument transformers - Part 8: Electronic current transformers

IEC 60044-7:1999

Instrument transformers - Part 7: Electronic voltage transformers