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GB/T 6451-2023 English PDF

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GB/T 6451-2023: Technical parameters and requirements for oil-immersed power transformers
Status: Valid

GB/T 6451: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 6451-20231699 Add to Cart 9 days Technical parameters and requirements for oil-immersed power transformers Valid
GB/T 6451-2015RFQ ASK 10 days Specification and technical requirements for oil-immersed power transformers Obsolete
GB/T 6451-2008RFQ ASK 9 days Specification and technical requirements for oil-immersed power transformers Obsolete
GB/T 6451-1999RFQ ASK 9 days Specification and technical requirements for three-phase oil-immersed power transformers [including MODIFICATION 1] Obsolete
GB/T 6451-1995RFQ ASK 3 days Specification and technical requirements for three-phase oil immersed power transformers Obsolete
GB 6451.1-1986239 Add to Cart 2 days Specification and technical requirements for three phase oil immersed power transformers 6, 10kv Obsolete

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Basic data

Standard ID: GB/T 6451-2023 (GB/T6451-2023)
Description (Translated English): Technical parameters and requirements for oil-immersed power transformers
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K41
Classification of International Standard: 29.180
Word Count Estimation: 85,846
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Older Standard (superseded by this standard): GB/T 6451-2015,GB/T 25289-2010
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 6451-2023: Technical parameters and requirements for oil-immersed power 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.
ICS 29.180 CCSK41 National Standards of People's Republic of China Replace GB/T 6451-2015, GB/T 25289-2010 Technical parameters and requirements of oil-immersed power transformers Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

Preface V 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 6kV, 10kV voltage level 2 5 20kV voltage level 9 6 35kV voltage level 16 7 66kV voltage level 23 8 110kV voltage level 29 9 220kV voltage level 36 10 330kV voltage level 44 11 500kV voltage level 52 12 750kV voltage level 59 13 1000kV voltage level 64 Appendix A (informative) Typical 1000kV single-phase three-winding auto-coupling power transformer wiring principle 75 Appendix B (normative) 20kV level high voltage dual voltage transformer test 76 Appendix C (Normative) Tests negotiated between the user and the manufacturer 77 Appendix D (informative) Induced voltage test with partial discharge measurement at the high-voltage line end of 1000kV class single-phase autotransformer (IVPD) and medium voltage line terminal AC withstand test (LTAC) instructions 78 Figure 1 Position of the box bottom bracket of 6kV and 10kV transformers (facing the long axis direction) 5 Figure 2 Bracket position 6 of 6kV and 10kV single-phase transformer cylindrical oil tank Figure 3 Bushing arrangement of single-phase transformer with two terminals of 6kV and 10kV low voltage level 8 Figure 4 Bushing arrangement of 6kV and 10kV low-voltage three-terminal ejection single-phase transformers 8 Figure 5 Bushing arrangement of 6kV and 10kV low-voltage terminal-side single-phase transformers (oblong oil tank) 8 Figure 6 Bushing arrangement of 6kV and 10kV low-voltage terminal-side single-phase transformers (cylindrical oil tank) 8 Figure 7 Bushing arrangement 9 of three-phase transformers with 6kV and 10kV cascade connection group numbers Dyn11, Yzn11, and Yyn0 Figure 8 Bushing arrangement of three-phase transformers with 6kV and 10kV cascade connection group number Yd11 or Dy11 9 Figure 9 Position of the box bottom bracket of the 20kV transformer (facing the long axis direction) 12 Figure 10 Bracket position of 20kV single-phase transformer cylindrical oil tank 13 Figure 11 Bushing arrangement of single-phase transformer with two terminals ejected from 20kV level 15 Figure 12 Bushing arrangement of 20kV low-voltage three-terminal single-phase transformer15 Figure 13 Bushing arrangement of single-phase transformer with 20kV low-voltage terminal side outlet (oblong oil tank) 15 Figure 14 Bushing arrangement of single-phase transformer with 20kV low-voltage terminal side outlet (cylindrical oil tank) 15 Figure 15 Bushing arrangement of 20kV three-phase transformer16 Figure 16 Position 1 of the bottom bracket of the 35kV transformer (facing the long axis direction) 19 Figure 17 Position 2 of the bottom bracket of the 35kV transformer (facing the long axis direction) 20 Figure 18 Bushing arrangement 22 of a double-winding transformer with 35kV cascade connection group numbers Dyn11 and Yyn0 Figure 19 Bushing arrangement 22 of a double-winding transformer with a 35kV cascade connection group number Yd11 Figure 20 Bushing arrangement 23 of a double-winding transformer with a 35kV cascade connection group number YNd11 Figure 21 Position 1 of the bottom bracket of the 66kV transformer (facing the long axis direction) 26 Figure 22 Position 2 of the box bottom bracket of the 66kV transformer (facing the long axis direction) 26 Figure 23 Bushing arrangement of the double-winding transformer with the 66kV cascade connection group number YNd11 28 Figure 24 Bushing arrangement 28 of a double-winding transformer with a 66kV cascade connection group number Yd11 Figure 25 Position 1 of the bottom bracket of the 110kV transformer (facing the long axis direction) 33 Figure 26 Position 2 of the box bottom bracket of the 110kV transformer (facing the long axis direction) 34 Figure 27 Bushing arrangement 35 of a double-winding transformer with a 110kV cascade connection group number YNd11 Figure 28 Bushing arrangement 35 of the three-winding transformer with the 110kV cascade connection group number YNyn0d11 Figure 29 Bushing arrangement of a double-winding transformer with 220kV low voltage of 6.3kV~20kV and connection group number YNd11 43 Figure 30 Bushing arrangement of a double-winding transformer with 220kV low voltage of 35kV~69kV and connection group number YNd11 43 Figure 31 Bushing arrangement 44 of the three-winding transformer with the 220kV cascade connection group number YNyn0d11 Figure 32 Bushing arrangement 44 of the three-winding autotransformer with the 220kV cascade connection group number YNa0d11 Figure 33 Bushing arrangement 51 of a double-winding transformer with a 330kV cascade connection group number YNd11 Figure 34 Bushing arrangement 51 of the three-winding autotransformer with the 330kV cascade connection group number YNa0d11 Figure 35 Bushing arrangement 52 of the three-winding transformer with the 330kV cascade connection group number YNyn0d11 Figure A.1 Typical 1000kV single-phase three-winding auto-coupling power transformer wiring diagram 75 Figure D.1 1000kV single-phase auto-coupling power transformer medium voltage line end AC withstand voltage test (LTAC) wiring diagram 78 Table 1 6kV, 10kV class 30kVA~2500kVA three-phase double winding non-excitation voltage regulating distribution transformer 2 Table 2 6kV, 10kV class 630kVA~6300kVA three-phase double winding non-excitation voltage regulating power transformer 3 Table 3 6kV, 10kV class.200kVA~2500kVA three-phase double winding on-load voltage regulating distribution transformer 3 Table 4 6kV, 10kV class 5kVA~160kVA single-phase double winding non-excitation voltage regulating distribution transformer 4 Table 5 20kV level 30kVA~2500kVA three-phase double winding non-excitation voltage regulating distribution transformer 10 Table 6 20kV class 5kVA~160kVA single-phase double winding non-excitation voltage regulating distribution transformer 10 Table 7 35kV level 50kVA~2500kVA three-phase double winding non-excitation voltage regulating distribution transformer 16 Table 8 35kV class 630kVA~31500kVA three-phase double winding non-excitation voltage regulating power transformer 17 Table 9 35kV level.2000kVA~31500kVA three-phase double winding on-load voltage regulating power transformer 18 Table 10 Vacuum degree and positive pressure value of 35kV transformer oil tank 20 Table 11 66kV class 630kVA~63000kVA three-phase double winding non-excitation voltage regulating power transformer 23 Table 12 66kV class 6300kVA~63000kVA three-phase double winding on-load voltage regulating power transformer 24 Table 13 Vacuum degree and positive pressure value of 66kV transformer oil tank 27 Table 14 110kV level 6300kVA~180000kVA three-phase double winding non-excitation voltage regulating power transformer 29 Table 15 110kV level 6300kVA~63000kVA three-phase three-winding non-excitation voltage regulating power transformer 30 Table 16 110kV class 6300kVA~63000kVA three-phase double winding on-load voltage regulating power transformer 30 Table 17 110kV class 6300kVA~63000kVA three-phase three-winding on-load voltage regulating power transformer 31 Table 18 110kV level 6300kVA~63000kVA three-phase double winding low voltage 35kV level non-excitation voltage regulating power transformer 31 Table 19 220kV level 31500kVA~420000kVA three-phase double winding non-excitation voltage regulating power transformer 36 Table 20 220kV level 31500kVA~300000kVA three-phase three-winding non-excitation voltage regulating power transformer 37 Table 21 220kV level 31500kVA~240000kVA low voltage 66kV level three-phase double winding non-excitation voltage regulating power transformer 38 Table 22 220kV level 31500kVA~240000kVA three-phase three-winding non-excitation voltage-regulated auto-coupling power transformer 38 Table 23 220kV level 31500kVA~240000kVA three-phase double winding on-load voltage regulating power transformer 39 Table 24 220kV level 31500kVA~240000kVA three-phase three-winding on-load voltage regulating power transformer 39 Table 25 220kV level 31500kVA~240000kVA three-phase three-winding on-load voltage regulating auto-coupling power transformer 40 Table 26 330kV level 90000kVA~720000kVA three-phase double winding non-excitation voltage regulating power transformer 45 Table 27 330kV level 90000kVA~240000kVA three-phase three-winding non-excitation voltage regulating power transformer 45 Table 28 330kV level 90000kVA~360000kVA three-phase three-winding non-excitation voltage-regulated autocoupling power transformer (series winding Group voltage regulation) 46 Table 29 330kV level 90000kVA~360000kVA three-phase three-winding on-load voltage-regulated autocoupling power transformer (series winding Terminal voltage regulation) 46 Table 30 330kV level 90000kVA~360000kVA three-phase three-winding non-excitation voltage-regulated autocoupling power transformer (medium voltage line terminal voltage regulation) 47 Table 31 330kV level 90000kVA~360000kVA three-phase three-winding on-load voltage regulating auto-coupling power transformer (medium voltage line end Voltage regulation 1) 47 Table 32 330kV level 90000kVA~360000kVA three-phase three-winding on-load voltage-regulated auto-coupling power transformer (medium voltage line end Voltage regulation 2) 48 Table 33 500kV class 100MVA~484MVA single-phase dual-winding power transformer 53 Table 34 500kV level 120MVA~1170MVA three-phase double winding power transformer 53 Table 35 500kV class 120MVA~400MVA single-phase three-winding non-excitation voltage regulating autocoupling power transformer (medium voltage line-end voltage regulation) Table 36 500kV class 120MVA~400MVA single-phase three-winding on-load voltage-regulated autocoupling power transformer (medium voltage line-end voltage regulation) 55 Table 37 750kV class 260MVA~380MVA single-phase dual-winding power transformer 59 Table 38 750kV level 750MVA~1140MVA three-phase double winding power transformer 59 Table 39 750kV level 500MVA~700MVA single-phase three-winding auto-coupling power transformer 60 Table 40 1000kV level 270MVA~400MVA single-phase dual-winding power transformer 64 Table 41 1000kV level 1000MVA~1500MVA single-phase three-winding auto-coupling power transformer 64 Table 42 1000kV class 1000MVA single-phase three-winding on-load voltage-regulated autocoupling power transformer (neutral point voltage regulation) 65 Table 43 Allowable operation duration of 1000kV transformer when the power frequency voltage increases66 Table 44 Rated insulation level of 1000kV bushing 68 Table 45 Terminal allowable load of 1000kV bushing 69

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 6451-2015 "Technical Parameters and Requirements for Oil-immersed Power Transformers" and GB/T 25289-2010 "20kV Technical parameters and requirements for oil-immersed distribution transformers. This document is based on GB/T 6451-2015 and integrates GB/T 25289-2010 Content. Compared with GB/T 6451-2015, in addition to structural adjustments and editorial changes, the main technical changes are as follows. ---The no-load loss of 6kV level and 10kV level non-excitation voltage regulating distribution transformers dropped by about 28% on average, and the no-load current dropped by about 20%. The no-load losses of 6kV and 10kV non-excitation voltage regulating power transformers and on-load voltage regulating distribution transformers have decreased on average About 20%, the no-load current drops by about 20% on average (see Table 1~Table 3, Table 1~Table 3 of GB/T 6451-2015). ---Added relevant technical content of 6kV and 10kV single-phase non-excitation voltage regulating distribution transformers (see Chapter 4). ---Added relevant technical content of 20kV transformers (see Chapter 5 and Appendix B). ---The no-load loss of 35kV transformers drops by about 20% on average, the load loss drops by about 5% on average, and the no-load current drops by about 20% (see Table 7~Table 9, Table 4~Table 6 of GB/T 6451-2015). ---The no-load loss of 66kV transformers drops by about 20% on average, the load loss drops by about 5% on average, and the no-load current drops by about 20% (see Table 11 and Table 12, Table 8 and Table 9 of GB/T 6451-2015). ---The no-load loss of 110kV transformers drops by about 20% on average, the load loss drops by about 5% on average, and the no-load current drops on average About 20% (see Table 14~Table 18, Table 11~Table 15 of GB/T 6451-2015). ---The no-load loss of 220kV transformers drops by about 20% on average, the load loss drops by about 5% on average, and the no-load current drops on average About 20% (see Table 19~Table 25, Table 16~Table 22 of GB/T 6451-2015). ---The no-load loss of 330kV transformers drops by about 20% on average, the load loss drops by about 5% on average, and the no-load current drops on average About 20% (see Table 26~Table 32, Table 23~Table 29 of GB/T 6451-2015). ---The no-load loss of 500kV transformers drops by about 20% on average, the load loss drops by about 5% on average, and the no-load current drops on average About 20% (see Table 33~Table 36, Table 30~Table 33 of GB/T 6451-2015). ---Added relevant technical content of 750kV and 1000kV transformers (see Chapter 12, Chapter 13, Appendix A and Appendix D). Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Transformer Standardization Technical Committee (SAC/TC44). This document was drafted by. Shenyang Transformer Research Institute Co., Ltd., Baoding Tianwei Baobian Electric Co., Ltd., Mingzhu Electric Co., Ltd. Co., Ltd., TBEA Shenyang Transformer Group Co., Ltd., Wujiang Transformer Co., Ltd., Chint Electric Co., Ltd., China Electric Power Technology Research Institute Co., Ltd., TBEA Hengyang Transformer Co., Ltd., Haihong Electric Co., Ltd., Xi'an Xidian Transformer Co., Ltd., Xi'an High Voltage Electrical Apparatus Research Institute Co., Ltd., Shandong Electric Power Equipment Co., Ltd., Changzhou Xidian Transformer Co., Ltd., Guangdong Power Grid Co., Ltd. Electric Power Research Institute, Hainan Weite Electric Group Co., Ltd., TBEA Xinjiang Transformer Factory, Jiangsu Su Huapeng Transformer Co., Ltd., Guangdong Kangdewei Electric Co., Ltd., Baoding Tianwei Group Tebian Electric Co., Ltd., Jiangsu Yawei Transformer Transformer Co., Ltd., China Southern Power Grid Co., Ltd. Ultra-High Voltage Transmission Company Maintenance and Test Center, Xiangtan Huaxia Special Transformer Co., Ltd. Division, Chenglai Electric Technology Co., Ltd., Zhejiang Detong Transformer Co., Ltd., Tianjin Tebian Electrical Transformer Co., Ltd., Wolong Electric Yinchuan Transformer Co., Ltd., Zhejiang Jiangshan Transformer Co., Ltd., Wuhu Jinniu Electric Co., Ltd., Hefei Yuanzhen Electric Power Technology Co., Ltd. Co., Ltd., Tiansheng Electric Co., Ltd., Chongqing Wangbian Electric (Group) Co., Ltd., Hebei Gaojing Electrical Equipment Co., Ltd., Shenda Electric Gas Group Co., Ltd., Shandong Dachi Electric Co., Ltd., Jiangsu Tianhua Transformer Co., Ltd., Jichang Electric Group Co., Ltd., Daqing Huayi Electric Gas Engineering Automation Co., Ltd., TBEA Beijing-Tianjin-Hebei Intelligent Technology Co., Ltd., and State Grid Shaanxi Electric Power Company Electric Power Research Institute. The main drafters of this document. Zhang Zhongguo, Zhang Dong, Cai Dingguo, Gao Minhua, Che Li, Lin Canhua, Li Jinbiao, Fu Chao, Sun Jicheng, Liu Jinbo, Liang Qingning, Nie Sanyuan, Hao Yuliang, Guo Penghong, Li Zixing, Lin Chunyao, Zhu Yanchun, Dong Honglin, Cai Shengwei, Meng Jie, Chen Qi, Wang Wenguang, Zhang Yajie, Tian Zhengwen, Deng Jun, Zhang Ximing, Zheng Guopei, Qian Guofeng, Zhao Wenzhong, Lu Wei, Jiang Zhenjun, Liu Chaofeng, Xiong Shifeng, Wu Tianyou, Zou Hong, Cao Jianfei, Zheng Jun, Kong Feifan, Zhou Hui, Guo Yanliang, Fu Jingxin, Li Qiangde, Qi Yingya, Liu Xiaowei. The previous versions of this document and the documents it replaces are as follows. ---First published as GB/T 6451-1986 in 1986, revised for the first time in.1995, revised for the second time in.1999, and third revised in.2008 The first revision, the fourth revision in.2015; ---This is the fifth revision and incorporates GB/T 25289-2010 "Technical Parameters and Requirements for 20kV Oil-immersed Distribution Transformer". Technical parameters and requirements of oil-immersed power transformers

1 Scope

This document specifies the performance parameters, technical requirements, inspection rules and methods, marking, lifting, packaging, transportation and Storage. This document is applicable to applications with rated frequency of 50Hz, rated capacity of 30kVA and above, and voltage levels of 6kV, 10kV, 20kV, Three-phase oil-immersed power transformers of 35kV, 66kV, 110kV, 220kV, 330kV, 500kV, 750kV and rated capacity of 5kVA and above, single-phase oil-immersed power transformers with voltage levels of 10kV, 20kV, 500kV, 750kV and 1000kV.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 1094.1 Power transformers Part 1.General provisions GB/T 1094.2 Power transformers Part 2.Temperature rise of liquid-immersed transformers GB/T 1094.3 Power transformers Part 3.Insulation levels, insulation tests and external insulation air gaps GB/T 1094.3-2017 Power transformer Part 3.Insulation level, insulation test and external insulation air gap GB/T 1094.5 Power transformer Part 5.Ability to withstand short circuit GB/T 1094.7 Power Transformers Part 7.Loading Guidelines for Oil-immersed Power Transformers GB/T 1094.10 Power transformer Part 10.Sound level determination GB/T 1094.18 Power transformer Part 18.Frequency response measurement GB/T 2900.95 Electrical terminology transformers, voltage regulators and reactors GB/T 4109 Insulating bushings with AC voltage higher than 1000V GB/T 11604 Radio interference test method for high-voltage electrical equipment JB/T 501 Power Transformer Test Guidelines JB/T 10088 6kV~1000kV power transformer sound level

3 Terms and definitions

The following terms and definitions as defined in GB/T 1094.1 and GB/T 2900.95 apply to this document. 3.1 When the 1000kV single-phase oil-immersed auto-coupling power transformer adopts the transformer body part and the voltage regulation compensation part to be arranged in separate boxes, the transformer body part. Note. See Appendix A for wiring principles. 3.2 The voltage regulation compensation part of the transformer is arranged separately from the main transformer. Note. The function of the voltage regu......
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