Category Archives: Current Transformers

CT Specs – Part 4 – (Class PX & Diff Protection)

Posted on June 30, 2020 by admin

CT Specs – Part 4 Class PX and Differential Protection Preamble This is the final part in the series of blogs on current transformers.  The topics covered in this blog are Class PX CT specifications.  An understanding of Class PX … Continue reading →

Posted in Current Transformers | 13 Comments

CT Specs – Part 3 – (IEEE vs IEC)

Posted on May 24, 2020 by admin

CT Specs – Part 3 – IEEE v/s IEC Preamble IEEE C57.13 standard is used for specifying current transformers in North America (USA and Canada).  The rest of the world now largely follows the International Standard IEC 61869.1 (previously IEC … Continue reading →

Posted in Current Transformers | 3 Comments

CT Specs – Part 2 – (Class P Application)

Posted on May 4, 2020 by admin

CT Specs – Part 2 – Class P Application Preamble Part 1 of this blog presented an overview of Australian & IEC standards for Class P type Current Transformer (CT) specifications.  This blog presents the application of Class P type … Continue reading →

Posted in Current Transformers | 3 Comments