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Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 20840.15-2022: Instrument transformers - Part 15: Additional requirements for voltage transformers for DC applications Status: Valid
Basic dataStandard ID: GB/T 20840.15-2022 (GB/T20840.15-2022)Description (Translated English): Instrument transformers - Part 15: Additional requirements for voltage transformers for DC applications Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K41 Classification of International Standard: 29.180 Word Count Estimation: 38,313 Date of Issue: 2022-10-14 Date of Implementation: 2023-05-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 20840.15-2022: Instrument transformers - Part 15: Additional requirements for voltage transformers for DC applications---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Instrument transformers -- Part 15.Additional requirements for voltage transformers for DC applications ICS 29.180 CCSK41 National Standards of People's Republic of China Transformer Part 15. Supplementary technical requirements for DC voltage transformers (IEC 61869-15.2018, MOD) Published on 2022-10-12 2023-05-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 5 Rating 4 6 Design and structure8 7 Trial 12 Appendix 15A (informative) This document is compared with IEC 61869-15.2018 structure number 26 Appendix 15B (informative) Technical differences between this document and IEC 61869-15.2018 and their reasons 27 Appendix 15C (informative) Recommended values for rated insulation level of DC voltage transformers 29 Reference 30 Figure 1501 Location of DC Voltage Transformer in DC System VI Figure 1502 Typical Step Response of a System3 Figure 1503 Error Limits for DCVT7 Figure 1504 Schematic diagram of a resistor-capacitor voltage divider with a low-voltage part outside the main body 17 Figure 1505 DCVT external low-voltage part withstand voltage test wiring diagram 18 Figure 1506 Schematic diagram of polarity reversal test 19 Figure 1507 Step Response Time Measurement 21 Table 1501 Voltage VI of DC Voltage Transformer Table 3 Partial discharge measurement voltage and allowable level5 Table 1502 Ratio Difference Limits of DCVT (Class 0.1~Class 3.0) 6 Table 6A.3 Extended accuracy class for low bandwidth DC voltage transformers7 Table 6A.4 Extended accuracy class 8 for high bandwidth DC voltage transformers Table 8 Static withstand test load 9 Table 9 Arc fault duration and characteristic criteria9 Table 1503 Terminal marking 10 Form 1504 General Nameplate Marking 11 Table 1505 Nameplate markings for each secondary converter 12 Table 1506 Nameplate Markings for Auxiliary Power Supply 12 Table 11 Test items 13 Table 1507 Harmonic Accuracy Test Voltage 20 Table 1508 Recommended values for applied voltage when measuring resistance 22 Table 15A.1 Comparison of structure numbers between this document and IEC 61869-15.2018 26 Table 15B.1 Technical differences between this document and IEC 61869-15.2018 and their reasons 27 Table 15C.1 Recommended values for rated primary insulation level of DC voltage transformers 29 forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. This document is part 15 of GB/T 20840 "Transformer". GB/T 20840 has released the following parts. --- Part 1.General technical requirements; --- Part 2.Supplementary technical requirements for current transformers; --- Part 3.Supplementary technical requirements for electromagnetic voltage transformers; --- Part 4.Supplementary technical requirements for combined transformers; --- Part 5.Supplementary technical requirements for capacitive voltage transformers; --- Part 6.Supplementary general technical requirements for low-power transformers; --- Part 7.Electronic voltage transformers; --- Part 8.Electronic current transformers; --- Part 9.Digital interface of transformers; --- Part 14.Supplementary technical requirements for DC current transformers; --- Part 15.Supplementary technical requirements for DC voltage transformers; --- Part 102.Ferromagnetic resonance in substations with electromagnetic voltage transformers; --- Part 103.The application of transformers in power quality measurement. This document is revised and adopted IEC 61869-15.2018 "Transformers Part 15.Supplementary Technical Requirements for DC Voltage Transformers". Compared with IEC 61869-15.2018, this document has more structural adjustments. List of structural changes between the two files See Appendix 15A. Compared with IEC 61869-15.2018, this document has many technical differences. In the outer margins of the clauses involved, vertical A straight single line (|) is marked. See Appendix 15B for a list of these technical differences and their reasons. The following editorial changes have been made to this document. --- The content of the introduction has been adjusted; --- The content of paragraph 1 of Chapter 1 has been rewritten, and the content of paragraph 4 has been adjusted from the main text to a note; --- Adjust "Note 1" in 3.4.1501 to "Note"; --- Adjusted the footnote form and symbol description form of Tsr and Ts in Figure 1502 of 3.5.1501; --- Adjust "Note 1" in 3.5.1502 and 3.5.1503 to "Note"; ---Added the introduction to 5.2; --- Modified the punctuation between the values in 5.5.602, 5.5.1501, 5.6.1502 and 5.1501; --- The content of the note in 6.6.1 has been adjusted; --- Adjusted the header format of Table 7 in IEC 61869-15.2018, and added the number of notes in the table; --- Adjusted the headings of 6.13.1501 and 6.13.1503, and added a header to Table 1503; --- The order of the test items in Table 10 in IEC 61869-15.2018 has been adjusted; --- Added a symbol description to Figure 1504 in 7.2.601, added a sub-graph number to Figure 1505, and corrected the relative relationship between the two sub-graph titles mutual location; --- Adjusted the footnote form of Tsr and Ts in Figure 1507 of 7.2.1503; --- Numbered the table of 7.3.5.1502 in IEC 61869-15.2018, and adjusted the unit "VDC" in the table to "V". Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Standardization Technical Committee of Transformers (SAC/TC222). This document is drafted by. China Electric Power Research Institute Co., Ltd., Shenyang Transformer Research Institute Co., Ltd., Nanjing NARI Jibao Electric Co., Ltd., China Southern Power Grid Science Research Institute Co., Ltd., Xi'an High Voltage Electric Apparatus Research Institute Co., Ltd., Dalian First Transformer Co., Ltd. limited liability company, Global Energy Internet Research Institute Co., Ltd., Jiangsu Kexing Electric Co., Ltd., Jiangsu Jingjiang Transformer Co., Ltd., Zhejiang Tianji Transformer Co., Ltd., Chongqing Shancheng Electric Appliance Factory Co., Ltd., Dalian North Transformer Group Co., Ltd., State Grid Shaanxi Electric Power Co., Ltd. Company Electric Power Research Institute. The main drafters of this document. Wang Benjin, Liu Yufeng, Xu Sien, Wu Shipu, Xu Lei, Nie Shaoxiong, Feng Jianhua, Deng Xiaopin, Luo Sunan, Sha Yuzhou, Dong Wei, Xiong Junjun, Zhao Lin, Yang Feng, Xiong Jiangyong, Tang Fuxin, Xu Wen, Ou Xitang, Sun Zelai, Yang Xiaoxi.IntroductionThe establishment of transformer standards is to establish a set of optimal evaluation criteria for transformers, and to provide transformers from raw material selection, design, production, etc. Provide guidance on matters needing attention in production, inspection, selection, operation and maintenance. GB/T 20840 aims to specify the The principles and related rules for design, manufacture, test, operation and maintenance are planned to be composed of 13 parts. --- Part 1.General technical requirements. The purpose is to specify the requirements applicable to the design, manufacture and production test of various types of transformers. General technical requirements to follow. --- Part 2.Supplementary technical requirements for current transformers. The purpose is to specify complementary technologies applicable to various types of current transformers Require. --- Part 3.Supplementary technical requirements for electromagnetic voltage transformers. The purpose is to specify the application to various types of electromagnetic voltage transformers supplementary technical requirements. --- Part 4.Supplementary technical requirements for combined transformers. The purpose is to specify supplementary technology applicable to various types of combined transformers Require. --- Part 5.Supplementary technical requirements for capacitive voltage transformers. The purpose is to stipulate that it is suitable for all kinds of capacitive voltage transformers supplementary technical requirements. --- Part 6.Supplementary general technical requirements for low-power transformers. The purpose is to specify the compensation applicable to various types of low-power transformers. charging technical requirements. --- Part 7.Electronic voltage transformers. The purpose is to specify supplementary technical requirements applicable to various types of electronic voltage transformers. --- Part 8.Electronic current transformers. The purpose is to specify supplementary technical requirements applicable to various types of electronic current transformers. --- Part 9.The digital interface of the transformer. The purpose is to specify the technical requirements applicable to the digital interface of various electronic transformers. --- Part 14.Supplementary technical requirements for DC current transformers. The purpose is to specify the compensation applicable to various types of DC current transformers. charging technical requirements. --- Part 15.Supplementary technical requirements for DC voltage transformers. The purpose is to specify the specifications applicable to various types of DC voltage current transformers. Supplementary technical requirements. --- Part 102.Ferromagnetic resonance in substations with electromagnetic voltage transformers. The purpose is to Provide guidance on the generation mechanism and suppression of ferromagnetic resonance in transformer substations. --- Part 103.The application of transformers in power quality measurement. The purpose is to analyze the application of various transformers in power quality measurement. Provide guidance on usage. This document is consistent with GB/T 20840.1-2010 "Transformer Part 1.General Technical Requirements" and GB/T 20840.6-2017 "Mutual Inductance" Part 6.Supplementary general technical requirements for low-power transformers. This document follows GB/T 20840.1-2010 and The writing structure of GB/T 20840.6-2017 is an addition and modification to its corresponding clauses. When GB/T 20840.1-2010 or When the terms of GB/T 20840.6-2017 are not mentioned in this document, as long as they are reasonable, these terms also apply to this document. Dangben When the document indicates "addition", "modification" or "replacement", it means the relevant The terms have been adapted accordingly in this document. For the chapters, clauses, figures, tables, notes and appendices supplemented on the basis of GB/T 20840.1-2010 and GB/T 20840.6-2017, this Documents use the following numbering format. --- The numbering of chapters, bars, figures, tables and notes starts from 1501; ---Appendix numbers are 15A, 15B, etc. GB/T 20840 clarifies the technical specifications of various transformer products through 13 parts, and gives specific technical requirements, test items Items, test procedures, test methods and operation instructions. By establishing clear scope, terminology, technical requirements and test requirements for various products etc., so that the personnel engaged in the design, production, testing and use of related products can operate more clearly and accurately, so as to provide It lays the foundation for designing and manufacturing high-quality products, better promotes trade, exchanges and technical cooperation, and provides support for the normal operation of my country's power grid. Assure. This document specifies the supplementary technical requirements for DC voltage transformers, which are mainly applicable to DC applications with one of the following functions. Voltage Transformer. --- measure DC voltage (including significant harmonics); --- Withstand DC voltage. The existing DC converter technologies mainly include grid-commutated converter (LCC) and voltage source converter (VSC), as follows. ---Grid commutated converter (LCC). Based on thyristor converter, it is characterized by adjustable unidirectional current and voltage polarity. Voltage and current harmonics, the frequency can reach 3kHz~4kHz; --- Voltage source converter (VSC). based on transistor converter, characterized by bidirectional current and single voltage polarity, voltage and current harmonic The frequency of the waves can be up to about 20 kHz. The location of the DC voltage transformer in the DC system is shown in Figure 1501. Figure 1501 Location of DC Voltage Transformers in DC Systems Table 1501 summarizes the voltage waveforms of DC voltage transformers and their main characteristics. Table 1501 Voltage of DC Voltage Transformers Voltage waveform characteristics Pure DC High accuracy measurement Harmonic measurement For measurement, control and protection The technology actually used for DC voltage transformers is resistive dividers (with or without additional capacitors). However, it may be possible to use its other technologies (eg. optical voltage sensor). This document contains some specific requirements that apply to resistor dividers, but apply to any technology. Transformer Part 15. Supplementary technical requirements for DC voltage transformers1 ScopeThis document specifies the terminology for a DC Voltage Transformer (DCVT) whose output signal may be analog or digital using any technology and all supplementary technical requirements for definitions, ratings, design and construction, testing, etc. This document applies to newly manufactured voltage transformers for measurement, protection and/or control in DC power systems with rated voltages greater than 1.5kV sensor. This document covers passive voltage dividers and active voltage transformers for measurement, control and protection. Note. Figure 601 of GB/T 20840.6-2017 describes the general configuration of single-pole low-power transformers.2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. Chapter 2 of GB/T 20840.6-2017 and the following supplements are applicable. GB/T 19749.1-2016 Coupling capacitors and capacitive voltage dividers - Part 1.General (IEC 60358-1.2012, MOD) GB/T 20840.1-2010 Transformer Part 1.General Technical Requirements (IEC 61869-1.2007, MOD) GB/T 20840.6-2017 Transformers Part 6.Supplementary general technical requirements for low power transformers (IEC 61869-6. 2016, MOD) GB/T 20840.8-2007 Transformers Part 8.Electronic Current Transformers (IEC 60044-8.2002, MOD) GB/T 20840.9-2017 Transformer Part 9.Digital Interface of Transformer (IEC 61869-9.2016, MOD) GB/T 26218.4-2019 Selection and dimensioning of high-voltage insulators used in dirty conditions - Part 4.For DC systems insulator3 Terms and DefinitionsChapter 3 of GB/T 20840.1-2010, Chapter 3 of GB/T 20840.6-2017 and Chapter 3 of GB/T 20840.9-2017 The defined terms and definitions, as well as the following additions and modifications, apply to this document. 3.1 General Definitions 3.1.1501 Transformers for DC applications with at least one of the following functions. --- measure DC current or DC voltage (including significant harmonics); ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20840.15-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 20840.15-2022_English as soon as possible, and keep you informed of the progress. 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