Common reasons:
: It includes requirements for both analogue and digital secondary signals used for measurement, protection, and control. iec 618691 pdf
: Clause 5.7 specifies accuracy requirements for harmonics and requirements for anti-aliasing filters in digital outputs. Frequency Range : Covers rated frequencies from 15 Hz to 400 Hz , including DC applications. iTeh Standards 2. Service & Environmental Conditions Environment The Ultimate Guide to the IEC 618691 PDF:
: IEC 61869-1:2023 (Replaces the 2007 edition and merges with IEC 61869-6:2016). Primary Function iec 618691 pdf
IEC 61869-1 is designed to be read in conjunction with specific part standards: