IEC TR 61869-103:2012

Instrument transformers - The use of instrument transformers for power quality measurement

IEC 61869-3:2011

Instrument transformers - Part 3: Additional requirements for inductive voltage transformers

IEC 61869-5:2011

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

IEC 60044-8:2002

Instrument transformers - Part 8: Electronic current transformers

IEC 60044-7:1999

Instrument transformers - Part 7: Electronic voltage transformers