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The IEC 61869-1:2023 Edition 2.0 standard updates the Product Family requirements for instrument transformers by integrating low-power (LPIT) requirements and expanding application scope to systems over 1 kV AC/1.5 kV DC. Key changes include new wideband accuracy classes for harmonics, updated test classifications, and the continued replacement of the IEC 60044 series. The document is available at the IEC Webstore . IEC 61869-1:2023

Here’s why:

New Accuracy Classes

: The 2023 edition introduces optional wideband accuracy classes (like WB1) to evaluate how transformers handle distorted current harmonics. iec 618691 pdf hot

The standard applies to instrument transformers designed for systems with: Nominal Voltages : Higher than Rated Frequencies : Ranging from 15 Hz to 400 Hz , including DC applications. Secondary Signals analogue and digital The IEC 61869-1:2023 Edition 2