A very specific and technical topic!
IEC 61869-1:2023 is the latest "product family" standard governing the general requirements for instrument transformers. It serves as a foundational document that must be used in conjunction with specific product standards (like Part 2 for current transformers or Part 3 for voltage transformers). IEC Webstore Key Technical Updates (2023 Edition) iec 618691 pdf hot
The IEC 61869-1 standard is the foundational "product-family" document for all instrument transformers, defining the general requirements for devices used in high-voltage applications above 1 kV AC or 1.5 kV DC IEC Webstore The latest version, IEC 61869-1:2023 A very specific and technical topic
: It now incorporates the general requirements for low-power instrument transformers (LPIT) from the now-cancelled IEC 61869-6. IEC Webstore Key Technical Updates (2023 Edition) The
If you use an old PDF from 2011, you are missing the "hot" technical updates regarding 5A vs. 1A secondary currents and low-power CTs (LPCTs).
: Defines error limits for both analogue and digital secondary signals. It introduced wideband accuracy classes (WB0 to WB4) to address harmonic performance up to 500 kHz. Service Conditions
The electrical industry just got a major upgrade. The latest standard is now the definitive guide for high-voltage instrument transformers, replacing the outdated 2007 edition.