IEC TR 61850-1-1:2026

IEC TR 61850-1-1:2026 which is a technical report, is applicable to power utility automation systems (PUAS). It defines the communication between intelligent electronic devices (IEDs) in such a system, and the related system requirements. This part gives an introduction and overview of the standard series. It refers to and might include text and figures coming from other parts of the standard series.
This document replaces the second edition of IEC TR 61850-1 published in 2013. The number has been changed from IEC TR 61850-1 to IEC TR 61850-1-1, as in the meantime there is also a document with the number IEC 61850-1-2. This edition constitutes a technical revision.
This edition includes the following significant changes with respect to the previous edition:
Updates to the TISSUE process.
Descriptions of the namespace concepts.
Renumbering the document from IEC 61850-1 to 61850-1-1.