HOME   Cart(0)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

GB/T 20840.4-2015 English PDF

US$469.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 20840.4-2015: Instrument transformers -- Part 4: Additional requirements for combined transformers
Status: Valid

GB/T 20840.4: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 20840.4-2015English469 Add to Cart 4 days [Need to translate] Instrument transformers -- Part 4: Additional requirements for combined transformers Valid GB/T 20840.4-2015
GB/T 20840.4-2015English469 Add to Cart 4 days [Need to translate] Instrument transformers -- Part 4: Additional requirements for combined transformers Valid GB/T 20840.4-2015

PDF similar to GB/T 20840.4-2015


Standard similar to GB/T 20840.4-2015

GB/T 19212.5   GB/T 10228   GB/T 8286   GB/T 20840.11   GB/T 20840.10   GB/T 20840.9   

Basic data

Standard ID GB/T 20840.4-2015 (GB/T20840.4-2015)
Description (Translated English) Instrument transformers -- Part 4: Additional requirements for combined transformers
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard K41
Classification of International Standard 29.180
Word Count Estimation 22,226
Date of Issue 2015-05-15
Date of Implementation 2016-06-01
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 20840.4-2015: Instrument transformers -- Part 4: Additional requirements for combined transformers


---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 4. Additional requirements for combined transformers ICS 29.180 K41 National Standards of People's Republic of China GB 20840.4-2015 Replacing GB 17201-2007 Transformer Part 4. Combined Transformer Supplementary technical requirements Instrumenttransformers-Part 4.Additionalrequirementsfor (IEC 61869-4.2013, MOD) 2015-05-15 released 2016-06-01 Implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Preface Ⅰ Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 3.1 Common definitions 1 3.7 Symbols and Names 3 5 rating 3 5.401 Measurement and protection of combined transformer supplement technical requirements 3 6 Design and structure 4 6.4 Temperature Requirements on Parts and Components 4 6.13 logo 4 7 Test 5 7.1 General requirements 5 7.2 Type test 6 7.3 Routine test 11 Appendix 4A (Informative) This part of the structural changes compared with IEC 61869-4.2013 12 Appendix 4B (informative) This section and IEC 61869-4.2013 technical differences and their causes 13 Appendix 4C (Normative) Current transformers and mutual influence of voltage transformers 14 4C.1 Current carrying conductor magnetic field on the voltage transformer error 14 4C.2 Impact of external voltage on current transformer error 14 Appendix 4D (informative) IEC 61869-4.2013 test circuit geometry layout of the conductor return distance a 16 Figure 401 test circuit geometry 9 Figure 402 0.2 voltage transformer error Figure 10 Figure 403 current transformer voltage drop Ui measurement 10 Figure 404 0.2 current transformer 5% of the rated current error Figure 11 Figure 4C.1 Current carrying conductors and magnetic fields affecting voltage transformers Table 11 Pilot Project 5 Table 4A.401 This part of the IEC 61869-4.2013 chapter number control situation 12 Table 4A.402 This part of IEC 61869-4.2013 chart number contrast 12 Table 4B.401 Technical differences between this part and IEC 61869-4.2013 and their causes 13 Table 4D.401 IEC 61869-4.2013 test circuit geometry layout of the conductor return distance a 16 GB 20840.4-2015

Foreword

The first chapter of this section, Chapter 2, Chapter 3, Chapter 4 and 7.4, 7.5 and Chapter 8 is recommended, the rest is mandatory. GB 20840 "Transformer" is divided into the following sections. --- Part 1. General technical requirements; --- Part 2. Current transformer additional technical requirements; --- Part 3. Electromagnetic voltage transformer supplementary technical requirements; --- Part 4. Combined transformer technical requirements; --- Part 5. Capacitive voltage transformer supplementary technical requirements; --- Part 6. Low-power mutual inductor universal technical requirements; --- Part 7. Supplementary technical requirements for electronic voltage transformers; --- Part 8. Supplementary technical requirements for electronic current transformers; --- Part 9. Transformer digital interface; --- Part 10. Low-power independent current sensor supplementary technical requirements; --- Part 11. Low-power independent voltage sensor additional technical requirements; --- Part 12. Combination of electronic transformer and combined independent sensor supplementary technical requirements; --- Part 13. Independent consolidation unit; --- Part 14. DC current transformer supplement technical requirements; --- Part 15. DC voltage transformer supplementary technical requirements. This part is the fourth part of GB 20840. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB 17201-2007 "combined transformer." This section and GB 20840.1-2010 "Transformer Part 1. General technical requirements", GB 20840.2-2014 "Transformer Part 2. Current transformer additional technical requirements "and GB 20840.3-2013" Transformer Part 3. Compensation of electromagnetic voltage transformers Charge technical requirements "supporting the use. This section follows the GB 20840.1, GB 20840.2 and GB 20840.3 written structure is the standard The corresponding provisions of the prospective addition and modification. When the provisions of GB 20840.1, GB 20840.2 and GB 20840.3 are not mentioned in this section, As long as reasonable, these terms also apply to this section. When specified in this section "add" "modify" or "substitute", it means The relevant provisions of GB 20840.1, GB 20840.2 and GB 20840.3 are adapted accordingly in this section. For GB 20840.1-2010, GB 20840.2-2014 and GB 20840.3-2013 on the basis of supplementary chapter, bar, map, Table, Note and Appendix, this section uses the following numbering. --- Chapter, Article, Figure, Table and Note the number starting from 401; --- The appendix number is 4A, 4B and so on. This section uses the redrafted law to amend the use of IEC 61869-4.2013 "Transformer Part 4. Combined transformer additional technology to be begging". This part of IEC 61869-4.2013 compared to the structure of the appropriate adjustments listed in Appendix 4A and this part of IEC 61869-4. 2013 chapter, article, chart, table number control list. This section compared with IEC 61869-4.2013 there are technical differences, the provisions of these differences have been passed in the outer margin of the page The vertical single line (|) at the location is identified and a list of the corresponding technical differences and their causes is given in Appendix 4B. This section also made the following editorial changes. --- Added "Introduction"; GB 20840.4-2015 --- Remove Chapter 4, Chapter 8, Chapter 9 and Chapter 10 chapter title; --- Remove the clause of clause 7.3.1.301 of IEC 61869-4.2013 and put it in 7.3.1 (section 7.3.2); --- Added information appendix 4D, IEC 61869-4.2013 unused test circuit geometry layout of the conductor The return distance a is listed in this appendix. This part is proposed by China Electrical Equipment Industry Association. This part of the National Standardization Technical Committee transformer (SAC/TC222) centralized. This part of the drafting unit. Shenyang Transformer Research Institute Co., Ltd., State Grid Electric Power Research Institute, Dalian first transformer limited liability Any company, Dalian North Transformer Group Co., Ltd., Ningbo Huatong Transformer Manufacturing Co., Ltd., TBEA Kangjia (Shenyang) transformer Limited Liability Company, State Grid Liaoning Electric Power Co., Ltd. Electric Power Research Institute, Zhongshan City, Taifeng Electric Co., Jiangxi Jiangxi Electric limited Company, Jiangsu Kexing Electric Co., Ltd., Dalian Second Transformer Group Co., Ltd., Zhejiang Horizon Transformer Co., Ltd., Chongqing Huahong Instrument Limited, Chint Electric Co., Ltd., Hengyang Huarui Electric Co., Ltd. The main drafters of this section. Zhangzhong Guo, Ye Guoxiong, Sha Yuzhou, Wang Renyi, He Chunan, Liu Yufeng, Zhang Junyang, He Zejian, Zhang Aimin, Cai Qiang, Teng Shouquan, Xu Wen, Qin Jiangfeng, Meng Xinzhi, Zeng Xiangshun, Wang Yang. This part replaces the standards previously issued as. --- GB 17201-2007. GB 20840.4-2015

Introduction

The IEC /TC38 standard system has now been restructured to readjust the previous IEC 60044 series of standards to current IEC 61869 series of standards. In order to better adopt international standards, National Transformer Standardization Technical Committee (SAC/TC222) after the study Decided that China's current national standard transformer system also according to IEC /TC38 new standard system to re-adjust the imminent IEC 60044 series of standards corresponding to each individual transformer national standards by IEC 61869 series of standards one by one corresponding relationship to be re- Developed to form a set of "common technical requirements" common part and each "additional technical requirements" dedicated part of the new transformer series of matching countries standard. The new national standards of the new transformer series to be constructed are as follows. General part of the standard number and the name of the part dedicated to the standard part of the standard name corresponding to the original standard number GB 20840.1 General technical requirements GB/T 20840.6 Low-power transformer The general technical supplement Surgery requirements GB 20840.2 current transformer supplementary technical requirements GB 1208 GB 16847 GB 20840.3 Electromagnetic voltage transformer supplementary technical requirements GB 1207 GB 20840.4 Combined transformer additional technical requirements GB 17201 Additional technical requirements of GB/T 20840.5 Capacitive voltage transformers Additional technical requirements of GB/T 20840.7 electronic voltage transformers GB/T 20840.8 electronic current transformer supplementary technical requirements GB/T 20840.9 Transformer digital interface GB/T 20840.10 low-power independent current sensor supplementary technical requirements GB/T 20840.8 GB/T 20840.11 Supplementary technical requirements for low power independent voltage sensors GB/T 20840.7 GB/T 20840.12 Combination of electronic transformer and combined independent sensor Supplementary technical requirements GB/T 20840.13 separate consolidation unit - GB/T 20840.14 DC Current Transformer additional technical requirements - GB/T 20840.15 DC voltage transformer supplementary technical requirements - GB 20840.4-2015 Transformer Part 4. Combined Transformer Supplementary technical requirements

1 Scope

GB 20840 applies to this section for electrical measuring instruments and electrical protection devices, the frequency of 15Hz ~ 100Hz new manufacturing The combination of transformers. This part of the requirements and tests, as well as GB 20840.1, GB 20840.2 and GB 20840.3 included current transformer and electromagnetic The requirements and tests of voltage transformers are all necessary for the combination transformer. Note 401. This section is based on single-phase combined transformer, but the relevant section also applies to three-phase combined transformer.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB 20840.1-2010 Chapter 2 and the following additions apply. GB 20840.1-2010 Transformers Part 1. General technical requirements (IEC 61869-1.2007, MOD) Transformers - Part 2. Supplementary technical requirements for current transformers (IEC 61869-2-2012, MOD) Transformers - Part 3. Technical supplementary requirements for electromagnetic voltage transformers (IEC 61869-3-2011, MOD)

3 Terms and definitions

GB 20840.1-2010, GB 20840.2-2014 and GB 20840.3-2013 as defined in the following terms and definitions apply to This document. 3.1 Common definitions 3.1.401 Combined transformer combinedinstrumenttransformer By the current transformer and voltage transformer combination of integrated transformer. 3.1.402 Voltage transformer voltage error voltageerrorvoltagetransformer εv Voltage transformer in the current transformer is not determined when the ratio of the current difference. 3.1.403 Voltage transformer phase difference phasedisplacementofvoltagetransformer δv The voltage transformer determines the phase difference when the current transformer is not energized. GB 20840.4-2015

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 20840.4-2015_English be delivered?

Answer: Upon your order, we will start to translate GB/T 20840.4-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 20840.4-2015_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 20840.4-2015_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 20840.4-2015?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20840.4-2015 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.