DIN EN 61869-6:2017-06

In addition to IEC 61869-1, this standard is another product family standard in the IEC 61869 series of standards. It contains additional general requirements for low-power instrument transformers consisting of an arrangement of one or more current or voltage sensor(s). These low-power instrument transformers may be connected to transmission systems and secondary converters intended for the transmission of an analog or digital information signal to measuring instruments, electricity meters, protective devices or control devices. They are used in alternating current applications with rated frequencies from 15 Hz to 100 Hz or in direct current applications. This product family standard is to be applied together with IEC 61869-1 in addition to the respective specific product standard. The description of the digital output format of the instrument transformers is not dealt with in this standard. The digital error is specified, the other characteristics of the digital interface for instrument transformers are standardized in IEC 61869-9, as an application of the horizontal series of standards IEC 61850, which considers the architecture of communication levels in substations in detail. This part of IEC 61869 defines the errors in case of analogue or digital output. The other characteristics of the digital interface for instrument transformers are standardised in IEC 61869-9 as an application of the standards, the IEC 61850 series, which details layered substation communication architecture. This standard considers additional requirements concerning bandwidth. The accuracy requirements on harmonics and requirements for the anti-aliasing filter are given in the normative Annex 6A. The technology used determines which parts are necessary for the realization of a low-power instrument transformer. The general block diagram can also be used for a single independent low-power sensor (low-power instrument transformer without active electronic components) if the blocks only consist of passive components and there is no power supply. The responsible committee is DKE/K 471 "Messwandler" ("Instrument transformers") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.