IEC 61869-15-2018 pdf free.Instrument transformers – Part 15: Additional requirements for voltage transformers for DC applications.
This part of lEC 61869 provides all requirements specific to voltage transformers to be usedin DC applications (DcVTs),whatever the technology used. The output signal can beanalogue or digital.
lt is applicable to newly manufactured voltage transformers used for measuring，protectionand/or control applications in DC power systems with a rated voltage above 1,5 kV.
This document covers passive voltage dividers as well as active voltage transformers,usedfor measurement, control and protection.
The general configuration of a single-pole low-power instrument transformer is described inFigure 601 of lEC 61869-6:2016.
2Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document. For dated references，only the editioncited applies. For undated references, the latest edition of the referenced document (includingany amendments) applies.
Clause 2 of lEC 61869-6:2016 is applicable, with the following additions:
IEC TS 60815-4:2016,Selection and dimensioning of high-voltage insulators intended for usein polluted conditions – Part 4 : lnsulators for DC systems
IEC TS 61245，Artificial pollution tests on high-voltage ceramic and glass insulators to beused on DC systems
IEC 61869-1:2007,Instrument transformers – Part 1 : General requirements
IEC 61869-6:2016,Instrument transformers – Part 6:Additional general requirements for low-power instrument transformers
IEC 61869-9:2016, Instrument transformers – Part 9: Digital interface for instrumenttransformers
3Terms, definitions, abbreviated terms and symbols
For the purposes of this document, the terms and definitions given in Clause 3 of lEC 61869-1:2007，of IEC 61869-6;2016 and of lEC 61869-9:2016 are applicable with the followingadditions and modifications.
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3.1General definitions
3.1.1 501 instrument transformer for DC application instrument transformer intended to be used in DC applications with at least one of thefollowing functions:measure DC current or DC voltage (with significant harmonics);.withstand DC voltage.
3.1.1 502 voltage transformer for Dc application DcvT instrument transformer for DC application in which the secondary signal，under normalconditions of use,is substantially proportional to the primary voltage
3.2Definitions related to dielectric ratings
3.2.2 highest voltage for equipment Um Definition 3.2.2 of lEC 61869-1:2007 is replaced by the following one:
highest value of DC voltage for which the equipment is designed to operate continuously, inrespect of its insulation as well as other characteristics that relate to this voltage.
3.3Definitions related to current ratings
3.3.1 501 maximum peak fault currentlsc maximum peak value of current occurring during a fault condition of the DC power system.IEC 61869-15 pdf download.