AS 61869.14:2021 pdf free download.Instrument transformers Part 14: Additional requirements for current transformers for DC applications (IEC 61869-14:2018 (ED 1.0) MOD). This part of IEC 61869 provides all requirements specific to current transformers to be used in DC applications (DCCTs), whatever the technology used. The output signal can be analogue or digital. It is applicable to newly manufactured current transformers used for measuring, protection and/or control applications in DC power systems with a rated voltage above 1,5 kV. The general configuration of a single-pole low-power instrument transformer is described in Figure 601 of IEC 61869-6:2016. The DCCTs intended for current measurement in the transistor branch of the VSC valve (referred to as CT4a and CT4b in Figure 1403 and Table 1402) are not covered by this document, and will be considered in a future revision. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Clause 2 of IEC 61869-6:2016 is applicable, with the following additions and modifications: IEC TS…

AS 61869.3:2021 pdf free.Instrument transformers Part 3: Additional requirements for inductive voltage transformers (IEC 61869-3:2011 (ED.1.0) MOD). This part of IEC 61869 applies to new inductive voltage transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz. NOTE 301 Requirements specific to three-phase voltage transformers are not Included In this standard but. so tar as they are relevant, the requirements in clauses 4 to 10 apply to these Iransformers and a few references to them are included in those clauses (e.g. see 3.1.303, 5.301.1, 5.301.2. 5.5.301, 6.13.301.1 and Table 304). All the transformers shall be suitable for measuring purposes, but, in addition, certain types may be suitable for protection purposes. Transformers for the dual purpose of measurement and protection shall comply with all clauses of this standard. 2 Normative references Clause 2 of IEC 61869-1:2007 is applicable with the following additions: IEC 60028. International Standard of resistance for copper IEC 60038, IEC standard voltages IEC 61869-1:2007, Instrument transformers — Part 1: General requirements 3 Terms, definitions and abbreviations For the purposes of this document, the terms and definitions in IEC 61869-1:2007 apply with the following additions: 3.1 General definitions 3.1.30 1…

AS 61869.2:2021 pdf free.INSTRUMENT TRANSFORMERS – Part 2: Additional requirements for Current Transformers. This part of IEC 61869 is applicable to newly manufactured inductive current transformers for use with electrical measuring instruments and/or electrical protective devices having rated frequencies from 15 Hz to 100 Hz. 2 Normative references Clause 2 of IEC 61869-1:2007 is applicable with the following additions: IEC 61869-1:2007, Instrument Transformers — Part 1: General requirements 3 Terms and definitions For the purposes of this document, the terms and definitions in IEC 61869-1:2007 apply with the following additions: 3.1 General definitions 3.1.20 1 current transformer instrument transformer in which the secondary current, under normal conditions of use, is substantially proportional to the primary current and differs in phase from it by an angle which is approximately zero for an appropriate direction of the connections (SOURCE: IEC 60050-321:1986, 321-02-011 3.1.202 measuring current transformer current transformer intended to transmit an information signal to measuring instruments and meters (SOURCE: IEC 60050-321:1986, 321-02-18] 3.1.203 protective current transformer a current transformer intended to transmit an information signal to protective and control devices (SOURCE: IEC 60050-321: 1986. 321-02-19) 3.1.204 class P protective current transformer protective current transformer without remanent flux limit, for which the…

AS 61869.9:2021 pdf free.Instrument transformers Part 9: Digital interface for instrument transformers (IEC 61869-9:2016 (ED 1.0) MOD). This part of IEC 61869 is a product family standard applicable to instrument transformers with digital output. The product standard is composed of IEC 61869-1 and IEC 61869-6, in addition to this standard and the relevant product specific standards in the IEC 61869 series (Part 7, Part 8. Part 12, Part 13, Part 14, and Part 15). This standard defines requirements for digital communications of instrument transformer measurements. It is based on the IEC 61850 series, UCA international users group document Implementation guideline for digital interface to instrument transformers using IEC 6 1850-9-2, and the relevant parts of IEC 60044-8 that are replaced by this standard. It includes additional improvements including the IEC 61588 network based time synchronization. 2 NormatIve references The following documents, In whole or in part, are normatively referenced in this document and are indispensable for its application, For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Clause 2 of IEC 61869-6:2016 is applicable with the following additions: IEC 61588:2009, Precision clock synchronization protocol for networked measurement…