GB/T 39891-2021 English PDFUS$629.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39891-2021: Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV Status: Valid
Basic dataStandard ID: GB/T 39891-2021 (GB/T39891-2021)Description (Translated English): Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K40 Word Count Estimation: 34,341 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 39891-2021: Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV---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.Electrical endurance testing for circuit-breakers above a rated voltage of 52 kV ICS 19.020 CCSK40 National Standards of People's Republic of China Test method for electrical durability of 52kV and above circuit breakers Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee Table of contentsForeword Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 General 2 4.1 Maintenance-free period of test samples 2 4.2 Factors to be considered when determining electrical durability test procedures 3 4.3 Composition of electrical durability test 3 4.4 Electrical durability test procedure category 3 4.5 Basic principles of electrical durability test procedures 3 5 Test sample 3 5.1 General 3 5.2 Test sample parameters and structure 3 5.3 Information about the test sample 4 5.4 Confirmation of consistency of test sample pattern and data 4 6 Electrical durability test procedure separate from standard type test 4 6.1 Test sequence and criteria 4 6.2 Test conditions for electrical endurance test separate from standard type test 5 7 Electrical durability test procedure combined with standard type test 6 7.1 General 6 7.2 The equivalent number of breaking operations 6 7.3 Combined test procedure 7 8 No-load test 8 8.1 General 8 8.2 Rated operating sequence 8 8.3 No-load operation test to verify the consistency of the test sample 9 8.4 No-load operation test before and after the electrical durability test 9 9 Wear test 9 9.1 General 9 9.2 Test procedures and requirements 9 10 Acceptance test 10 10.1 General 10 10.2 No-load operation test 10 10.3 T10 test 10 10.4 L75 test at 60% rated short-circuit breaking current 10 10.5 Line charging current switching test 11 10.6 Status check 11 Appendix A (Informative) The closing and breaking test methods of circuit breakers related to the electrical endurance test 13 A.1 Basic short-circuit test method 13 A.2 Near-zone fault test 14 A.3 Out-of-step closing and opening test (OP1 and OP2) 14 A.4 Line charging current switching test 14 Appendix B (informative) Example of electrical endurance test for circuit breakers separated from standard type tests 15 B.1 Test sample 15 B.2 Test procedure 16 Reference 28 Figure 1 Connection of three-pole switchgear Figure 12 Figure B.1 Schematic diagram of test sample 16 Figure B.2 Single-divided no-load characteristic curve oscilloscope Figure 17 Figure B.3 Single combined no-load characteristic curve oscilloscope diagram 17 Figure B.4 T10 (T60) wear test circuit 18 Figure B.5 T10 abrasion test oscillogram 19 Figure B.6 T10 acceptance test loop 20 Figure B.7 T10 acceptance test oscillogram 21 Figure B.8 L75 acceptance test circuit 22 with 60% rated short-circuit breaking current Figure B.9 L75 acceptance test oscillogram 24 for 60% rated short-circuit breaking current Figure B.10 LC1 acceptance test loop 25 Figure B.11 LC1 acceptance test oscillogram 25 Figure B.12 Impulse voltage test circuit for condition check 27 Table 1 Electrical durability test sequence and criteria separated from standard type test 4 Table 2 Breaking times at 60% rated short-circuit breaking current (M90) 5 Table 3 Test conditions for electrical durability test separated from standard type test 5 Table 4 Equivalent times of breaking operation 6 Table 5 Combined procedure of electrical endurance test and standard type test of 50kA circuit breaker using synthetic test---not included in the electrical life Life type test method 7 Table 6 Combined procedure of electrical endurance test and standard type test of 50kA circuit breaker using synthetic test---can be included in the electrical life Type test method of life 8 Table 7 The capacitive voltage coefficient used in the capacitive current acceptance test for verifying electrical durability and the standard capacitive current type test The relationship between the capacitive voltage coefficient of 11 Table B.1 No-load characteristic test parameter record table 18 Table B.2 T10 (T60) Wear Test Parameter Record Table 19 Table B.3 T10 acceptance test parameter record table 21 Table B.4 Record of TRV parameters for L75 acceptance test of 60% rated short-circuit breaking current 23 Table B.5 L75 acceptance test parameter record table 23 for 60% rated breaking current Table B.6 LC1 acceptance test parameter record table 26 Table B.7 Use impulse voltage or use T10 TRV method condition inspection test parameter record table 27ForewordThis 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" Drafting. This document was proposed and managed by the National Standardization Technical Committee on Inspection Methods for Key Products of Quality Supervision (SAC/TC374). Drafting organizations of this document. Suzhou Electrical Apparatus Research Institute Co., Ltd., National Energy Switchgear Evaluation Center, State Grid Materials Co., Ltd. Company, State Grid Shanghai Electric Power Research Institute, Shenyang University of Technology, Shenzhen Graduate School of Tsinghua University, Xi’an Jiaotong University, Gansu Su Electric Scientific Research Institute, Shanghai Tianling Switch Factory Co., Ltd., Shanghai Siemens High Voltage Switch Co., Ltd., Chint Electric Co., Ltd., Jiangsu Rugao High Voltage Electrical Appliance Co., Ltd., General Electric (China) Energy Development Co., Ltd., State Grid Ningxia Electric Power Co., Ltd. Electric Power Research Institute Research Institute, State Grid Jiangsu Electric Power Co., Ltd. Material Branch, State Grid Jiangsu Electric Power Co., Ltd. Electric Power Research Institute, Beijing BOE Zhen Air Electric Co., Ltd., Beijing Cree Distribution Automation Co., Ltd., State Grid Zhejiang Electric Power Co., Ltd. Material Branch, Rock Weir Automation (China) Co., Ltd., State Grid Hunan Electric Power Research Institute, Jiangsu Fangtian Electric Power Technology Co., Ltd. The main drafters of this document. Hu Delin, Hu Lun, Qi Zhongyi, Wu Hongyan, Chen Jinmeng, Li Ling, Yuan Zhiwen, Lin Xin, Wang Liming, Wu Yi, Li Ping, Tan Yan, Lou Dan, Guo Xiaomin, Peng Xiang, Ren Xuhui, Ai Shaogui, Yin Weijun, Shen Qijun, Jia Yongyong, Liu Baohua, Ye Zubiao, Guo Wei, Zhang Ying, Pan Liang, Mao Liuming, Hu Jiarui, Liu Tao, Chen Yanqing, Chen Yuqin.IntroductionThe extended electrical life of the circuit breaker defined in 3.4.113 of GB/T 1984-2014 (Class E2 circuit breaker), that is, the electrical durability of the circuit breaker The performance is derived from the operating experience of specific high-voltage circuit breakers and system protection and maintenance strategies. Moreover, for the newly developed circuit breaker, the electrical resistance Durability can only be verified by laboratory tests. The new maintenance strategy tends to be "maintenance-free circuit breakers". For most users, reducing maintenance costs is the main problem, and Maintenance performance can be verified through laboratory tests. In order to prevent different users from adopting different electrical durability test procedures, to ensure that the circuit breaker electrical It is necessary to propose a standardized test procedure for the consistency of the gas durability data. Test method for electrical durability of 52kV and above circuit breakers1 ScopeThis document specifies the general rules of electrical durability test for circuit breakers of 52kV and above, test samples, and standard type tests. Electrical durability test procedures, electrical durability test procedures combined with standard type tests, no-load test, abrasion test and acceptance test. This document is applicable to E2 class SF6 circuit breakers of 52kV and above for overhead lines.2 Normative referencesThe contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 1984-2014 high voltage AC circuit breaker GB/T 2900.20-2016 Electrical terminology high-voltage switchgear and control equipment GB/T 7674-2008 Gas-insulated metal-enclosed switchgear with rated voltage of 72.5kV and above GB/T 11022-2011 Common technical requirements for high-voltage switchgear and control equipment standards3 Terms and definitionsGB/T 1984-2014, GB/T 2900.20-2016, GB/T 11022-2011 and the following terms and definitions apply to This document. 3.1 Heavy breakdown restrike After the arc is extinguished during the breaking operation of the switching device, within a quarter of the power frequency cycle or longer, there is no residual current between the contacts. The current reappears. Note. All circuit breakers in operation have a certain degree of heavy breakdown probability. The level of the probability of heavy breakdown also depends on the operating conditions (e.g. insulation coordination, annual The number of operations, the user's maintenance plan, etc.).Therefore, in order to classify the heavy breakdown performance of the circuit breaker, two-level circuit breakers are introduced. C1 level and C2 level. [Source. GB/T 2900.20-2016, 9.43, with modification] 3.2 C1 circuit-breaker class C1 A circuit breaker that has a low probability of heavy breakdown during the capacitive current interruption process verified by a prescribed type test. [Source. GB/T 1984-2014, 3.4.114] 3.3 C2 circuit-breaker class C2 A circuit breaker that has a very low probability of heavy breakdown during the capacitive current interruption process verified by a prescribed type test. [Source. GB/T 1984-2014, 3.4.115] 3.4 E2 circuit-breaker class E2 A type of circuit breaker. During its expected service life, the parts used for breaking in the main circuit do not require maintenance, and only a few other parts are required. Maintenance (breakers with extended electrical life). ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 39891-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 39891-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 39891-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 39891-2021_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. 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