prBAS EN IEC 61869-1:2025

IEC 61869-1:2023 is applicable to newly manufactured instrument transformers intended for applications where the nominal voltage is higher than 1 kV AC or 1,5 kV DC, with an analogue or a digital secondary signal for measuring, protection and control purposes, with rated frequencies from 15 Hz to 400 Hz, or for DC applications.<br /> The general requirements for instrument transformers for applications in LV systems (nominal voltage = 1 kV AC or = 1,5 kV DC) are covered by IEC 61869-201.<br /> This part of IEC 61869 is a product family standard and covers general requirements only. For each type of instrument transformer, the product standard is composed of this document and the relevant specific product standard.<br /> This part of IEC 61869 contains the requirements for the limits of the errors both for analogue and digital secondary signal. The other characteristics of a digital interface for instrument transformer are standardised in IEC 61869-9 as an application of the IEC 61850 horizontal standard series, covering communication networks and systems for power utility automation.<br /> This part of IEC 61869 considers bandwidth requirements. The accuracy requirements on harmonics and requirements for the anti-aliasing filter are specified in 5.7.<br /> IEC 61869-1:2023 cancels and replaces the first edition published in 2007 and IEC 61869-6:2016. This edition constitutes a technical revision.<br /> This edition includes the following significant technical changes with respect to the previous edition:<br /> a) merger with IEC 61869-6:2016;<br /> b) new scope: equipment for HV applications with a nominal voltage ; 1 kV AC or 1,5 kV DC;<br /> c) new classification of some special tests as type tests or routine test;<br /> d) additional type tests, additional special tests and new clause for commissioning tests;<br /> e) new annexes E, F, G and I.