GB/T 1094.11-2022 English PDF

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GB/T 1094.11-2022: Power transformers - Part 11: Dry-type transformers
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GB/T 1094.11: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 1094.11-2022	1159	Add to Cart	7 days	Power transformers - Part 11: Dry-type transformers	Valid
GB/T 1094.11-2007	305	Add to Cart	Auto, < 3 mins	[GB/T 1094.11-2007] Power transformers. Part 11: Dry-type transformers	Obsolete

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Basic data

Standard ID: GB/T 1094.11-2022 (GB/T1094.11-2022)
Description (Translated English): Power transformers - Part 11: Dry-type transformers
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K41
Word Count Estimation: 58,556
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 1094.11-2022: Power transformers - Part 11: Dry-type 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.
Power transformers - Part 11.Dry-type transformers ICS 29.180 CCSK41 National Standards of People's Republic of China Replacing GB/T 1094.11-2007 Power transformers - Part 11.Dry-type transformers (IEC 60076-11.2018,MOD) Published on 2022-03-09 2022-10-01 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 2 4 Operating conditions 2 5 Ratings and general requirements5 6 tap 8 7 Link Group 8 8 Ability to withstand short circuits8 9 Nameplate 8 10 Temperature rise limit9 11 Insulation level 11 12 Climatic, environmental and combustion performance class 12 13 Seismic performance 14 14 Test 14 15 Deviation 31 16 Protection against direct contact 31 17 Enclosure protection class 31 18 Ground terminal 31 19 INFORMATION REQUIRED FOR INQUIRY AND ORDER 31 20 Installation and Safety 31 Appendix A (informative) Structural changes between this document and IEC 60076-11.201832 Appendix B (informative) Technical differences between this document and IEC 60076-11.2018 and their reasons34 Appendix C (normative) Cooling of transformers in naturally ventilated rooms 36 Appendix D (normative) Environmental tests for evaluating uncased outdoor transformers 38 Appendix E (Normative) Seismic Performance and Seismic Test 41 Appendix F (normative) Loss calculations for different reference temperatures and/or winding materials 45 Appendix G (Informative) Transformer Installation and Safety 47 Reference 49 Fig. 1 Basic measurement circuit for partial discharge test of single-phase transformer 16 Figure 2 Basic measurement circuit for partial discharge test of three-phase transformers 17 Fig. 3 The applied voltage mode of partial discharge routine test 17 Figure 4 Example of single-phase mutual load method 20 Figure 5 Three-phase mutual load method example 20 Fig. 6 The applied voltage mode of the partial discharge special test 21 Figure 7 Test Chamber 27 Figure 8 Test Chamber Details 28 Figure C.1 Heat dissipation in a naturally ventilated room 36 Figure D.1 Salt spray multi-parameter aging cycle 39 Table 1 Letter code 7 Table 2 Winding temperature rise limit 10 Table 3 Insulation level 11 Table 4 Correction factor of applied withstand voltage level 12 Table 5 Test sequence 14 Table 6 Climatic class characteristics 22 Table 7 Environmental class 24 Table 8 Dimensions of the test chamber 26 Table A.1 The comparison between this document and IEC 60076-11.2018 chapter numbering 32 Table A.2 Comparison of chart numbers between this document and IEC 60076-11.201833 Table B.1 Technical differences between this document and IEC 60076-11.2018 and their reasons 34 Table D.1 Outdoor Environment Class 38 Table E.1 Approximate acceleration levels and seismic levels 42 Table E.2 Ground acceleration levels (AG) 42 Table E.3 Recommended superelevation factor (K) 43 Table E.4 Direction factor (D) 43

foreword

This 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 11 of GB/T 1094 "Power Transformers". GB/T 1094 has released the following parts. --- Part 1.General; --- Part 2.Temperature rise of liquid-immersed transformers; --- Part 3.Insulation levels, insulation tests and air gaps for external insulation; --- Part 4.Lightning impulse and operating impulse test guidelines for power transformers and reactors; --- Part 5.Ability to withstand short circuits; --- Part 6.Reactors; --- Part 7.Loading guidelines for oil-immersed power transformers; --- Part 10.Sound level determination; --- Part 10.1.Application Guidelines for Sound Level Determination; --- Part 11.Dry-type transformers; --- Part 12.Loading guidelines for dry-type power transformers; --- Part 14.Liquid-immersed power transformers using high-temperature insulating materials; --- Part 15.Gas-filled power transformers; --- Part 16.Transformers for wind power generation; --- Part 18.Frequency response measurement; --- Part 23.DC bias suppression device. This document replaces GB/T 1094.11-2007 "Power transformers - Part 11.Dry-type transformers", and GB/T 1094.11- Compared with.2007, except for structural adjustment and editorial modification, the main technical changes are as follows. --- Increase the applicable range of the highest voltage of the equipment to 72.5kV (see Chapter 1, Chapter 1 of the.2007 edition); --- Adjusted normative references (see Chapter 2, Chapter 2 of the.2007 edition); --- The conditions of use have been improved and supplemented (see Chapter 4, Chapter 4 of the.2007 edition); --- Modified and improved the rated capacity and cooling method signs (see Chapter 5, Chapters 8 and 10 of the.2007 edition); --- The content of the nameplate mark has been improved and supplemented (see Chapter 9, Chapter 9 of the.2007 edition); --- Modified the altitude correction of the transformer temperature rise limit (see Chapter 10, Chapter 11 of the.2007 edition); ---Increase Um for the insulation level of 72.5kV transformers, and apply the altitude adjustment of withstand voltage to transformers of each voltage level. Amendments are being made (see Chapter 11); --- The relevant requirements for climate, environment and combustion performance levels have been improved and supplemented (see Chapter 12, Chapter 13 of the.2007 edition chapter); --- Increased seismic characteristics (see Chapter 13); --- The test items and test methods have been improved and supplemented (see Chapter 14, Chapter 14 to Chapter 28 of the.2007 edition). This document uses the redrafting method to modify and adopt IEC 60076-11.2018 "Power transformers - Part 11.Dry-type transformers". Compared with IEC 60076-11.2018, this document has many structural adjustments. Appendix A lists this document and IEC 60076-11. 2018 chapter chart number comparison list. There are technical differences between this document and IEC 60076-11.2018, and the clauses involved in these differences have been The vertical single line (|) in the blank position is marked, and a list of the corresponding technical differences and their reasons is given in Appendix B. The following editorial changes have also been made to this document. --- Correct the content of item g) of IEC original 4.2 to the content noted in 4.2.6 of this document; ---In item g) of 9.1, "Note. When the heat resistance grade of each winding is the same, only one winding can be marked"; ---In Table 3, "Note. If the user has other requirements, the insulation level with Um of 40.5kV can also be based on the applied withstand voltage of 40.5kV. The lightning full-wave impulse withstand voltage of 80kV, series I is 170kV, and the lightning full-wave impulse withstand voltage of series II is 200kV is selected, but it needs to be indicated in the order contract. "; --- Adjust K1 in formula 14.3.2.2.2 to K1; adjust IN in formula 14.3.2.3 to Ir, ΔθN to Δθr; --- Corrected Chapter 13 mentioned in IEC original 14.4.5.1 (14.4.4.1 of this document) to Chapter 12; --- Corrected 14.4 mentioned in IEC original 14.4.6.7 (14.4.5.7 of this document) to 14.4.5.5; --- Corrected Chapter 15 mentioned in 14.4.8 to 14.2, and adjusted the form of column items; ---Change θr in Appendix D to θrpa, and θ0 to θ0pa; --- ISO 12944 (all parts) removed from References. 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 Transformer Standardization Technical Committee (SAC/TC44). This document is drafted by. Shenyang Transformer Research Institute Co., Ltd., Shunte Electric Equipment Co., Ltd., Shanghai Huguang Transformer Co., Ltd. Company, Pearl Electric Co., Ltd., Chint Electric Co., Ltd., Guangzhou CRRC Junfa Electric Co., Ltd., China Electric Power Research Institute Institute Co., Ltd., Wolong Electric Group Beijing Huatai Transformer Co., Ltd., Hainan Jinpan Intelligent Technology Co., Ltd., Hainan Weite Electric Group Co., Ltd., Haihong Electric Co., Ltd., Zhejiang Detong Transformer Co., Ltd., Baoding Tianwei Shunda Transformer Co., Ltd., Guangdong Kangde Wei Electric Co., Ltd., Tianjin TBEA Transformer Co., Ltd., Zhenjiang Tianli Transformer Co., Ltd., TBEA Intelligent Electric Co., Ltd., Shenyang Zhongbian Electric Co., Ltd., TBEA Hunan Electric Co., Ltd., Shandong Electric Power Equipment Co., Ltd., Xinhua Du Special Electric Co., Ltd., Wujiang Transformer Co., Ltd., Zhejiang Jiangshan Transformer Co., Ltd., Chenglai Electric Technology Co., Ltd. Company, Wolong Electric Yinchuan Transformer Co., Ltd., Shandong Dachi Chixiang Electric Co., Ltd., Chongqing Wangbian Electric (Group) Co., Ltd., Hua Xiangxiangneng Technology Co., Ltd., Guangdong Zhongpeng Electric Co., Ltd., Xi'an Xidian Transformer Co., Ltd. The main drafters of this document. Zhang Zhongguo, Li Xia, Zhang Xianzhong, Long Ye, Cai Dingguo, Zhong Zhaolong, Fan Jianping, Fu Chao, He Baozhen, Lv Xiangpeng, Ren Xiaohong, Lei Yong, Zhu Yanchun, Liang Qingning, Qian Guofeng, Qin Jinli, Wang Wenguang, Zhao Wenzhong, Li Yun, Fang Yujie, Tian Guishu, Ou Qiang, Xue Jiyin, Zong Baofeng, Lin Canhua, Jiang Zhenjun, Zheng Guopei, Lu Wei, Chen Yuguo, Cheng Yunnu, Huang Zhiwen, Chen Jianfei, Ren Zhen. The previous versions of the documents replaced by this document are as follows. ---First published in 1986 as GB 6450-1986, and first revised as GB/T 1094.11-2007 in.2007; ---This is the second revision.

Introduction

The formulation of power transformer standards is to establish a set of best evaluation criteria for power transformers, and to provide power transformers from production materials. Provide guidance on matters needing attention in selection, product design, product production, product inspection, product selection, and operation and maintenance. GB/T 1094 aims to establish compliance principles and relevant regulations applicable to the design, manufacture, test methods, operation and maintenance of power transformers. Then, it is proposed to consist of 14 parts. --- Part 1.General. The purpose is to establish the rules applicable to the design, manufacture and production test of various types of power transformers. General principles and related rules. --- Part 2.Temperature rise of liquid immersed transformers. The purpose is to establish the relevant temperature rise aspects applicable to various types of liquid immersed power transformers. technical requirements and test methods. --- Part 3.Insulation level, insulation test and external insulation air gap. The purpose is to establish suitable for various types of liquid immersed power transformers Technical requirements and insulation test methods for insulation levels, insulation tests and external insulation air gaps. --- Part 4.Lightning impulse and operating impulse test guidelines for power transformers and reactors. The purpose is to establish Technical requirements and test methods for lightning impulse testing and operational impulse testing of power transformers and reactors. --- Part 5.Ability to withstand short circuits. The purpose is to establish the relevant specifications applicable to various types of power transformers regarding their ability to withstand short circuits. Technical requirements and test methods for ability to withstand short circuits. --- Part 6.Reactors. The purpose is to establish technical requirements and test requirements applicable to various types of reactors. --- Part 7.Loading guidelines for oil-immersed power transformers. The purpose is to carry out the operation of various types of oil-immersed power transformers with load. provide guidance. --- Part 10.Sound level determination. The purpose is to establish technical requirements applicable to various types of power transformers and reactors related to sound levels. Test methods for the determination of summed sound levels. --- Part 10.1.Application guidelines for sound level determination. The purpose is to measure the sound level of various power transformers and reactors. Provide guidance. --- Part 11.Dry-type transformers. The purpose is to establish technical requirements and test requirements applicable to various types of dry-type power transformers. --- Part 12.Dry-type power transformer load guidelines. The purpose is to improve various types of dry-type power transformers related to load operation. for guidance. --- Part 14.Liquid-immersed power transformers using high-temperature insulating materials. The purpose is to establish suitable for various types of high temperature insulation Technical requirements and test requirements for materials of liquid immersed transformers. --- Part 15.Gas-filled power transformers. The purpose is to establish technical requirements and tests applicable to various types of gas-filled power transformers. inspection requirements. --- Part 16.Transformers for wind power generation. The purpose is to establish the technical requirements and tests applicable to various types of wind power transformers. inspection requirements. --- Part 18.Frequency response measurements. The purpose is to establish technical requirements applicable to various types of power transformers related to frequency response. Test method for summed frequency response measurement. --- Part 23.DC bias suppression device. The purpose is to establish the technical requirements and tests applicable to various types of DC bias suppression devices. inspection requirements. GB/T 1094 clarifies the technical requirements and test requirements of various types of power transformers and reactors through 14 parts. Specific test procedures, test methods and operating instructions are provided. By establishing clear scope, terminology, technical requirements and test methods for various products etc., so that producers, users and relevant test personnel can operate more clearly and accurately, so as to design and manufacture high-quality products, Good promotion of trade, exchanges and technical cooperation, and provide guarantees for the normal operation of my country's power grid. Power transformers - Part 11.Dry-type transformers

1 Scope

This document specifies the terms and definitions, operating conditions, ratings and general requirements of dry-type transformers, taps, connection groups, short-circuit withstand Capability, nameplate, temperature rise limits, insulation level, climate, environmental and flammability classes, seismic characteristics, tests, deviations, guarantees against direct contact protection, enclosure rating, grounding terminals, information required for enquiry and ordering, as well as installation and safety aspects. This document applies to dry-type power equipment with a maximum voltage of 72.5kV and below and at least one winding with a voltage higher than 1.1kV Transformers (including autotransformers, hereinafter referred to as transformers). This document does not apply to. --- Gas-filled dry-type transformers (when the gas charged is not air); ---Single-phase transformers with rated capacity less than 5kVA; --- Polyphase transformers with rated capacity less than 15kVA; --- Transformer; ---Starting transformer; --- Test transformer; --- Traction transformers for electric locomotives; ---Explosion-proof mine transformer; --- Welding transformer; --- regulating transformer; --- Focus on small power transformers that consider safety. When there is no corresponding standard for the above transformers or other special transformers, this document can be applied in whole or in part.

2 Normative references

The 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. GB/T 311.1 Insulation Coordination Part 1.Definitions, Principles and Rules (GB/T 311.1-2012, IEC 60071-1.2006, MOD) GB/T 311.2 Insulation Coordination Part 2.Guidelines for Use (GB/T 311.2-2013, IEC 60071-2..1996, MOD) GB/T 1094.1-2013 Power Transformers Part 1.General (IEC 60076-1.2011, MOD) GB/T 1094.2 Power Transformers Part 2.Temperature Rise of Liquid Immersion Transformers (GB/T 1094.2-2013, IEC 60076-2. 2011, MOD) GB/T 1094.3-2017 Power Transformers Part 3.Insulation Level, Insulation Test and External Insulation Air Clearance (IEC 60076-3. 2013, MOD) GB/T 1094.5 Power Transformers Part 5.Ability to withstand short circuits (GB/T 1094.5-2008, IEC 60076-5. 2006, MOD) GB/T 1094.10 Power Transformers Part 10.Determination of Sound Level (GB/T 1094.10-2003, IEC 60076-10.2001, MOD) ......

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