BS PD IEC/TS 60076-23:2018

BS PD IEC/TS 60076-23:2018 specifies requirements for devices for the suppression of DC magnetic bias ofpower transformers and convertor transformers. It includes requirements for serviceconditions, structures, testing, packing, transport and storage.The devices are connected to neutral points of power transformers and convertertransformers to suppress DC bias current in the case an HVDC system is operated inmonopole ground return mode or bipolar unbalanced mode. In the case of dedicated metallicreturn HVDC system, the devices are useful to mitigate DC stray current flowing throughpower transformers and converter transformers during transient conditions such as DC linefault.This document applies to DC magnetic bias suppression devices for operation at frequenciesof 50 Hz and 60 Hz on power systems having voltages above 110 kV.Cross References:IEC 60076-5IEC 62271-1IEC 60068-3-3IEC 60060-1IEC 61071IEC 60168IEC 60137IEC 60076-3IEC 60529