The International Electrotechnical Commission (IEC) in cooperation with the Transformers Committee of the IEEE Power & Energy Society has released IEC/IEEE 60076-57-129:2017. This first edition standard applies to power transformers for HVDC applications; it cancels and replaces the first edition of IEC 61378-2.
“IEC/IEEE 60076-57-129:2017(E) specifies requirements of liquid-immersed three-phase and single-phase converter transformers for use in high voltage direct current (HVDC) power transmission systems including back-to-back applications. It applies to transformers having two, three or multiple windings.
This document does not apply to:
– converter transformers for industrial applications (see IEC 61378-1 or IEEE C57.18.10);
– converter transformers for traction applications (see IEC 60310).
This publication cancels and replaces the first edition of IEC 61378-2 published in 2001 and IEEE Std C57.129™ published in 2007.”
*Description from the IEC Website