GB/T 7674-2020 English PDFUS$1359.00 · In stock
Delivery: <= 8 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7674-2020: Gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above Status: Valid GB/T 7674: Historical versions
Basic dataStandard ID: GB/T 7674-2020 (GB/T7674-2020)Description (Translated English): Gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K43 Classification of International Standard: 29.130.10 Word Count Estimation: 73,722 Date of Issue: 2020-11-19 Date of Implementation: 2021-06-01 Older Standard (superseded by this standard): GB/T 7674-2008 Quoted Standard: GB/T 1985-2014; GB/T 2423.17-2008; GB/T 3785.1; GB/T 3785.2; GB/T 4109-2008; GB/T 7354; GB/T 8905; GB/T 9326.1; GB/T 9326.2; GB/T 9326.3; GB/T 9326.4; GB/T 9326.5; GB/T 9789; GB/T 11017.1; GB/T 11022-2011; GB/T 11023; GB/T 12022; GB/T 13540; GB/T 16927.1 Adopted Standard: IEC 62271-203-2011, MOD Regulation (derived from): National Standard Announcement No. 26 of 2020 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration Summary: This standard specifies the terms and definitions, normal and special use conditions, ratings, design and structure, type tests, factory tests and selection guidelines for gas-insulated metal-enclosed switchgear. This standard applies to gas-insulated metal-enclosed switchgear (hereinafter referred to as "GIS" or "switchgear") installed indoors and outdoors with a rated voltage of 72.5kV and above and a rated frequency of 50Hz (hereinafter referred to as "GIS" or "switching equipment"), whose insulation is obtained at least partially by insulating gas Not air under atmospheric pressure. The gas-insulated metal-enclosed switchgear covered by this standard consists of independent components that can be directly connected together, and these components can only operate in this way. According to the needs, this standard completes and supplements the relevant standards applicable to the individual components of the GIS. GB/T 7674-2020: Gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above---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.(Gas-insulated metal-enclosed switchgear with rated voltage of 72:5kV and above) ICS 29:130:10 K43 National Standards of People's Republic of China Replace GB/T 7674-2008 Gas insulated metal with rated voltage 72:5kV and above Enclosed switchgear (IEC 62271-203:2011,High-voltageswitchgearandcontrolgear- above52kV,MOD) 2020-11-19 released 2021-06-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee Table of contentsPreface Ⅴ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Normal and special conditions of use 4 4:1 Overview 4 4:2 Normal use conditions 4 4:3 Special conditions of use 4 5 Rating 5 5:1 Overview 5 5:2 Rated voltage (Ur) 6 5:3 Rated insulation level 6 5:4 Rated frequency (fr) 7 5:5 Rated current and temperature rise 7 5:6 Rated short-time withstand current (Ik) 8 5:7 Rated peak withstand current (Ip) 8 5:8 Rated short-circuit duration (tk) 8 5:9 Rated power supply voltage (Ua) of closing and opening devices and auxiliary and control circuits 8 5:10 Rated power frequency of closing and opening devices and auxiliary and control circuits 8 5:11 Rated pressure of compressed air source for controllable pressure system 8 5:12 Rated charging level for insulation and/or opening and closing 8 6 Design and structure 8 6:1 Overview 8 6:2 Requirements for liquids in switchgear and control equipment 8 6:3 Gas requirements in switchgear and control equipment 8 6:4 Grounding of switchgear and control equipment 9 6:5 Auxiliary and control equipment 9 6:6 Power operation 9 6:7 Energy storage operation 9 6:8 Operations that do not rely on manpower or power (non-locking operations) 9 6:9 Tripper operation 9 6:10 Low pressure and high pressure blocking and monitoring devices 9 6:11 Nameplate 10 6:12 Interlocking device 10 6:13 Position indication 10 6:14 Degree of protection of the enclosure 10 6:15 Creepage distance 10 6:16 Gas and vacuum tightness 10 6:17 Liquid tightness 11 6:18 Flammability 11 6:19 Electromagnetic compatibility (EMC) 11 6:20 X-ray radiation 11 6:21 Corrosion 11 6:101 Pressure fit 12 6:102 Internal fault 12 6:103 Housing 13 6:104 Partition 14 6:105 Pressure release 16 6:106 Noise 16 6:107 Interface 16 6:108 Expansion joint 17 6:109 Observation window 17 7 Type test 18 7:1 General 18 7:2 Insulation test 19 7:3 Radio interference voltage (riv) test 22 7:4 Loop resistance measurement 22 7:5 Temperature rise test 22 7:6 Short-time withstand current and peak withstand current test 23 7:7 Verification of protection 24 7:8 Gas tightness test and gas state measurement 24 7:9 Electromagnetic compatibility test (EMC) 24 7:10 Additional tests for auxiliary and control circuits 24 7:11 X-ray test procedure for vacuum interrupter 24 7:101 Verification of closing and breaking capacity 25 7:102 Mechanical and environmental testing 25 7:103 Enclosure verification test 25 7:104 Pressure test of diaphragm 26 7:105 Test under internal fault arc conditions 27 7:106 Insulator test 27 7:107 Corrosion test of ground connection 27 7:108 Corrosion test of enclosure 28 8 Factory test 28 8:1 Overview 28 8:2 Insulation test of the main circuit 28 8:3 Test of auxiliary and control circuits 29 8:4 Measurement of main circuit resistance 29 8:5 Tightness test 29 8:6 Design and visual inspection 29 8:101 Pressure test of enclosure 29 8:102 Mechanical operation test 29 8:103 Test of auxiliary circuits, equipment and interlocks in control mechanisms 30 8:104 Pressure test of diaphragm 30 9 Guidelines for Selection of Switchgear and Control Equipment 30 9:1 Overview 30 9:2 Selection of ratings 30 9:3 Continuous or transient overload caused by changes in operating conditions 30 10 Information provided with inquiry sheet, bidding document and order 30 10:1 Overview 30 10:2 Inquiry and order information 30 10:3 Information about the tender 30 11 Transportation, storage, installation, operation and maintenance 31 11:1 Overview 31 11:2 Conditions of transportation, storage and installation 31 11:3 Installation 31 11:4 Run 35 11:5 Maintenance 35 12 Security 35 13 The impact of the product on the environment 35 Appendix A (informative appendix) Structural changes of this standard compared with IEC 62271-203:2011 36 Appendix B (informative appendix) Information to be given for inquiry forms, bids and orders 44 Appendix C (informative appendix) Continuity of operation 50 Appendix D (informative appendix) Calculations related to internal faults 58 Appendix E (Normative Appendix) Scope II Test procedure for insulation test of three-pole enclosed GIS 59 Appendix F (Normative Appendix) Test methods for gas-insulated metal-enclosed switchgear under internal arc fault conditions 60 Appendix G (Normative Appendix) Matters to be considered about field test technology and actual conditions 63 Reference 67ForewordThis standard was drafted in accordance with the rules given in GB/T 1:1-2009: This standard replaces GB/T 7674-2008 "Gas insulated metal enclosed switchgear with rated voltage of 72:5kV and above", and Compared with GB/T 7674-2008, the main technical changes are as follows: ---According to my country's environmental conditions, the relevant content of Table 101 has been modified (see 4:3, 2:2 of the:2008 edition); ---Modified the test voltage between the 126kV and 252kV fractures in Table 102 (see 5:3, 4:2 in the:2008 edition); ---The expansion joint and related technical requirements have been added (see 6:108); ---Added the observation window and related technical requirements (see 6:109); ---Modified the gas quality verification content in Chapter 10 installation (see 11:3:101:7, 10:2:101:6 in the:2008 edition); ---Added the content of appendix C operation continuity; ---Modified the content of the DC component in Appendix F Test Method under Internal Fault Arc Conditions (see F:2:2:3,:2008 edition B:2:2:2): This standard uses the redrafting method to modify and adopt IEC 62271-203:2011 "High-voltage switchgear and control equipment Part 203: amount Gas-insulated metal-enclosed switchgear with constant voltage of 52kV and above": Compared with IEC 62271-203:2011, this standard has many adjustments in structure: Appendix A lists this standard and IEC 62271- 203:2011 chapter number comparison list: The technical differences between this standard and IEC 62271-203:2011 and the reasons are as follows: --- Regarding normative reference documents, this standard has made adjustments with technical differences to adapt to my country's technical conditions and adjustments: The situation is collectively reflected in Chapter 2 "Normative Reference Documents", and the specific adjustments are as follows: ● Replace IEC 60068-2-11 with GB/T 2423:17-2008 which is equivalent to adopting international standards; ● Replace IEC 62271-102:2001 with GB/T 1985-2014, which is modified to adopt international standards; ● Replace IEC 60137:2008 with GB/T 4109-2008 which is modified to adopt international standards; ● Replace IEC 60270 with GB/T 7354 which is modified to adopt international standards; ● Replace IEC 60480 with GB/T 8905 which is modified to adopt international standards; ● Replace IEC 60840 with GB/T 11017:1 modified to adopt international standards; ● Replace IEC 62067 with GB/T 22078:1 which is modified to adopt international standards; ● Replace IEC 62271-1:2007 with GB/T 11022-2011 which is modified to adopt international standards; ● Replace IEC 62271-209:2007 with GB/T 22381-2017 which is modified to adopt international standards; ● Replace IEC 62271-303 with GB/T 28537 which is modified to adopt international standards; ● Added references to GB/T 3785 (all parts), GB/T 9326 (all parts), GB/T 9789, GB/T 11023, GB/T 12022, GB/T 13540, GB/T 16927:1, GB/T 21429, GB/T 22382-2017, GB/T 23752, GB/T 26218 (all parts), GB/T 28819; ● Deleted IEC 60044-1:1996, IEC 60044-2:1997, IEC 60141-1, IEC 60376, IEC /T R61639: 1996, IEC 62271-100:2008, ISO 3231; --- Delete the unquoted terms and definitions in the text, and re-describe "destructive discharge" (see Chapter 3, 3:17); ---According to the actual situation of my country's power grid, the relevant content of the rated frequency of 60Hz in the international standard has been deleted; according to my country's medium and high voltage Classification custom, the applicable rated voltage is changed from "52kV and above" to "72:5kV and above" (see Chapter 1); ---Increase the lower limit of normal indoor and outdoor use conditions (see 4:3); ---Rated voltage, delete the rated voltage value that has nothing to do with my country's power grid, according to the voltage specified in GB/T 11022-2011 According to the actual situation of my country's power grid, relevant parameters with rated voltages of 800kV and 1100kV have been added (see 5:2); --- The operation that does not rely on manpower or power is modified to GB/T 11022-2011 5:7 is not applicable (see 6:8); ---Added relevant technical requirements for equipment corrosion prevention (see 6:21); ---The criterion of 7:6:101 has been modified to be consistent with GB/T 11022-2011 (see 7:6:101); --- Increased the ascent speed limit for the destructive pressure test (see 6:103:2); ---The expansion joint and related technical requirements have been added (see 6:108); ---Added the observation window and related technical requirements (see 6:109); ---Added the requirements for confirmatory test every eight years and the requirements for gas use and treatment (see 7:1:1); --- Deleted the description of the short connecting wire on the voltage transformer in the short-time and peak withstand current test of the main circuit (see 7:6:101); ---Added the relevant requirements for the switchgear stroke---time characteristic measurement (see 7:102:3); ---Added the relevant requirements of the factory sealing test (see 8:5); ---According to the actual situation in my country, the specified value of the field test voltage in Table 7 has been modified (see 11:3:101:2:4); ---Adjust the informative appendix C of the international standard "Matters to be considered and related field test technology" to the normative appendix G: This standard has made the following editorial changes: ---In order to be consistent with my country's technical standard system, the name of this standard is revised to "Gas Insulated Metal Seal with Rated Voltage 72:5kV and above Closed switch equipment"; ---In accordance with the requirements of GB/T 1:1-2009, the compilation of "scope" is standardized; ---The source of terms and definitions, replace IEC 60050-471 with GB/T 2900:8-2009, which is equivalent to adopting international standards: 2007; Replaced IEC 60050(441):1984 with GB/T 2900:20-2016 which was modified to adopt international standards; ---Added a note on "partition" (see 3:8); ---Added the explanation that the wet test is only carried out at the closing position (see 7:2:3); --- Added the description that the basin insulators that have been type tested may not be tested repeatedly (see 7:106:1); ---Deleted the two informative appendices of Appendix G and Appendix H in the international standard: This standard was proposed by China Electrical Equipment Industry Association: This standard is under the jurisdiction of the National High Voltage Switchgear Standardization Technical Committee (SAC/TC65): Drafting organizations of this standard: Xi'an High Voltage Apparatus Research Institute Co:, Ltd:, China Electric Power Research Institute Co:, Ltd:, State Grid Shaanxi Province Electric Power Research Institute of Electric Power Company, Shanghai Xidian High Voltage Switchgear Co:, Ltd:, Xi'an Xidian Switch Electric Co:, Ltd:, New Northeast Electric Group High Voltage Switchgear Co:, Ltd:, Pinggao Group Co:, Ltd:, Guangdong Power Grid Co:, Ltd: Dongguan Power Supply Bureau, Liaoning High Voltage Electrical Product Quality Inspection Co:, Ltd:, Xiamen Huadian Switchgear Co:, Ltd:, ABB (China) Co:, Ltd:, Xiamen ABB High Voltage Switchgear Co:, Ltd:, Xi'an Xidian High Pressure Switch Co:, Ltd:, Chuankai Electric Co:, Ltd:, Shandong Taikai High Voltage Switch Co:, Ltd:, Beijing Beikai Electric Co:, Ltd:, Special Substation Zhongfa Shanghai High Voltage Switchgear Co:, Ltd:, TBEA Shenyang Electric Technology Research Institute Co:, Ltd:, Zhejiang Bada Electronic Instrument Co:, Ltd: Si Shi Tong Electric Branch, Shanghai Siyuan High Voltage Switchgear Co:, Ltd:, Yihe Electric Group Co:, Ltd:, Yunnan Yunkai Electric Co:, Ltd: Company, Huayi Electric Co:, Ltd:, Zhejiang Switch Factory Co:, Ltd:, Henan Senyuan Electric Co:, Ltd:, Haining Switch Factory Co:, Ltd: Company, Risheng Group Co:, Ltd: The main drafters of this standard: Zhang Jinbo, Wu Hongyan, Tian Enwen, Zhang Zixiao, Yuan Fuxing, Zhang Wenbing, Cui Boyuan, Yang Ren, Hou Pingyin, Zhao Bonan, Zhao Xiying, Feng Wujun, Zhang Shi, Xing Na, Li Gang, Li Qiang, Hao Yuliang, Xie Ruitao, You Yimin, Wang Chuanchuan, Yan Guanxing, Zhou Hua, Wang Xiangke, Wu Wenhai, Zhang Meng, Meng Di, Yang Yingjie, Wu Jingfeng, Jian Yongfeng, Ding Bin, Yang Bo, Zhang Weiping, Li Zhibo, Li Zhenjun, Li Jianhua, Nan Zhenle, Lu Quanfeng, Liu Luopeng, Li Baobao, Yang Weiwei, Ma Li, Yin Hongyan, Zhang Wenbo, Sun Rongchun, Wang Fuan, Zhang Shu, Shi Pengbin, Ye Shuxin, Gong Shaocheng, Wang Jiancheng, Kong Xiangchong, Tian Xiaoyue, Pan Shiyan, Su Weimin, Chen Borong, Zhou Qingqing, Yuan Zhibing, Zhang Pengju, Lu Zhenghua, Liu Yang, Fan Jianrong, Lin Aimin, Ou Linlong: The previous versions of the standard replaced by this standard are as follows: ---GB 7674-1987, GB 7674-1997, GB/T 7674-2008: Gas insulated metal with rated voltage 72:5kV and above Enclosed switchgear1 ScopeThis standard specifies the terms and definitions, normal and special use conditions, ratings, design and structure of gas-insulated metal-enclosed switchgear: Relevant requirements for configuration, type test, factory test and selection guidelines: This standard applies to gas-insulated metal enclosures for indoor and outdoor installations with a rated voltage of 72:5kV and above and a rated frequency of 50Hz: Switchgear (hereinafter referred to as "GIS" or "switchgear"), whose insulation is obtained at least partially through insulating gas rather than at atmospheric pressure Down the air: The gas-insulated metal-enclosed switchgear covered by this standard consists of independent components that can be directly connected together, and these components can only Run in this way: According to needs, this standard completes and supplements the relevant standards applicable to the individual components of the GIS:2 Normative referencesThe following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 1985-2014 high voltage AC isolating switch and earthing switch (IEC 62271-102:2001 A1:2011, MOD) GB/T 2423:17-2008 Environmental testing of electric and electronic products Part 2: Test method Test Ka: Salt spray (IEC 60068- 2-11:1981, IDT) GB/T 3785:1 Electroacoustic Sound Level Meter Part 1: Specifications (GB/T 3785:1-2010, IEC 61672-1:2002, IDT) GB/T 3785:2 Electroacoustic Sound Level Meter Part 2: Type Evaluation Test (GB/T 3785:2-2010, IEC 61672-2: 2003, IDT) GB/T 4109-2008 Insulating pipe sleeves with AC voltage higher than 1000V (IEC 60137:2008, MOD) GB/T 7354 High Voltage Test Technology Partial Discharge Measurement (GB/T 7354-2018, IEC 60270:2000, MOD) GB/T 8905 Gas management and detection guidelines in sulphur hexafluoride electrical equipment (GB/T 8905-2012, IEC 60480:2004, MOD) GB/T 9326 (all parts) AC 500kV and below paper or polypropylene composite paper insulated metal sheathed oil-filled cable and accessories [IEC 60141 (all parts)] GB/T 9789 Metal and other inorganic coatings, sulfur dioxide corrosion test under normal condensation conditions (GB/T 9789-2008, ISO 6988:1985, IDT) GB/T 11017:1 Rated voltage 110kV (Um=126kV) XLPE insulated power cable and its accessories Part 1: Test methods and requirements (GB/T 11017:1-2014, IEC 60840:2011, MOD) GB/T 11022-2011 Common technical requirements for high-voltage switchgear and control equipment standards (IEC 62271-1:2007, MOD) GB/T 11023 High-voltage switchgear sulfur hexafluoride gas tightness test method GB/T 12022 Industrial sulfur hexafluoride GB/T 13540 Seismic requirements for high-voltage switchgear and control equipment (GB/T 13540-2009, IEC 62271-2::2003, MOD) GB/T 16927:1 High Voltage Test Technology Part 1: General Definition and Test Requirements (GB/T 16927:1-2011, ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7674-2020_English be delivered?Answer: Upon your 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