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Defines error limits for both analogue and digital secondary signals, working in tandem with the IEC 61869-9 digital interface standard . iec 618691 pdf hot
Specific requirements for Inductive Voltage Transformers. You don't need to buy a $500 PDF for a single clause
This paper addresses the latest 2023 revision of the standard, which introduced optional wideband accuracy classes (WB0 to WB4) to handle higher harmonics in modern power grids. It specifically explores the WB2 class , which requires accuracy for frequencies up to 20 kHz . iec 618691 pdf hot