DIN EN 61850-7-4 : 2022 Title: Communication networks and systems for power utility automation - Part 7-4: Basic communication structure - Compatible logical node classes and data object classes (IEC 61850-7-4:2010 + A1:2020); English version EN 61850-7-4:2010 + A1:2020 Year: 2022 Publisher: DIN Media GmbH Availability: Within 1-2 working days