DIN EN IEC 61869-1:2025-09

This document 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. This document 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. This document 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. This document considers bandwidth requirements. The accuracy requirements on harmonics and requirements for the anti-aliasing filter are specified in 5.7. 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. The standard differs from DIN EN 61869-1 (VDE 0414-9-1):2010-04 as follows: a) merger with IEC 61869-6:2016; b) new scope: equipment for HV applications with a nominal voltage > 1 kV AC or 1,5 kV DC; c) new classification of some special tests as type tests or routine test; d) additional type tests, additional special tests and new clause for commissioning tests; e) new annexes E, F, G and I.