GB/T 21697-2022 English PDF

US$419.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21697-2022: Insulation coordination of lightning overvoltage for low-voltage distribution wiring and electronic systems
Status: Valid

GB/T 21697: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21697-2022	419	Add to Cart	4 days	Insulation coordination of lightning overvoltage for low-voltage distribution wiring and electronic systems	Valid
GB/T 21697-2008	319	Add to Cart	3 days	Insulation coordination of low voltage power line and electronic system	Obsolete

Similar standards

GB/T 30137   GB/T 20877   GB/T 12325   GB/T 20236   GB/T 16679.1   

Basic data

Standard ID: GB/T 21697-2022 (GB/T21697-2022)
Description (Translated English): Insulation coordination of lightning overvoltage for low-voltage distribution wiring and electronic systems
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: K04
Word Count Estimation: 21,235
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 21697-2022: Insulation coordination of lightning overvoltage for low-voltage distribution wiring and electronic systems

---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.
Insulation coordination of lightning overvoltage for low-voltage distribution wiring and electronic systems ICS 91.120.40 CCSK04 National Standards of People's Republic of China Replacing GB/T 21697-2008 Lightning overvoltage in low-voltage distribution lines and electronic systems Insulation coordination Published on 2022-07-11 2023-02-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Lightning current and lightning overvoltage 3 4.1 Lightning current 3 4.2 Lightning overvoltage 3 5 Insulation coordination and insulation level 3 5.1 Overview 3 5.2 Applied voltage 4 5.3 Lightning overvoltage insulation coordination 4 5.4 Insulation level 5 6 Insulation test and its requirements 6 6.1 Insulation test 6 6.2 Test requirements 6 6.3 Environmental conditions 6 7 Selection and application of lightning protection measures 7 7.1 Surge protector7 7.2 Isolation Transformer 7 7.3 Isolation spark gap 7 7.4 Fiber 7 7.5 Grounding and grounding device 7 7.6 Shield 8 Appendix A (Informative) Main Lightning Parameters 9 Appendix B (Informative) Lightning Overvoltage 11 Appendix C (Informative) Low Voltage Equipment Immunity Criteria 14 Appendix D (normative) SPD insulation coordination and selection requirements 15 Reference 17

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 replaces GB/T 21697-2008 "Lightning Overvoltage Insulation Coordination for Low-Voltage Power Lines and Electronic Equipment Systems", and Compared with GB/T 21697-2008, in addition to structural adjustment and editorial changes, the main technical changes are as follows. a) The standard name is changed to "Insulation coordination of lightning overvoltage in low-voltage distribution lines and electronic systems"; b) Modified the scope (see Chapter 1, Chapter 1 of the.2008 edition); c) Added terms such as "self-recovery insulation" (see Chapter 3), deleted terms such as "electrical clearance" (see Chapter 3 of the.2008 edition), - Modified terms such as "insulation coordination" (see Chapter 3, Chapter 3 of the.2008 edition); d) Deleted "normal use conditions" (see 4.2 of the.2008 edition); e) Added "Lightning current and lightning overvoltage" (see Chapter 4); f) Added "Classification of Insulation" (see 5.1.1); g) Modified "Insulation coordination method" (see 5.1.2, 5.4 of the.2008 edition); h) Modified "equipment with protective device" (see 5.3.1, 5.5.1 of the.2008 edition); i) MODIFY "Equipment powered directly from the distribution network" (see 5.4.1, 6.1.1 of the.2008 edition); j) Modified "Preferred value of lightning impulse withstand voltage" (see 5.4.3, 6.2 of the.2008 edition); k) Modified "Insulation Test", merged 8.1 of the.2008 edition into 6.1 (see 6.1, 8.1 of the.2008 edition); l) Added "Test Requirements" (see 6.2); m) Added "Atmospheric Condition Correction" and "Altitude Correction" (see 6.3.2, 6.3.3); n) Deleted "Lightning arrester or SPD protection level" (see Chapter 7 of the.2008 edition); o) Added "Selection and Application of Lightning Protection Measures" (see Chapter 7); p) Added Appendix A "Main Lightning Parameters", Appendix B "Lightning Overvoltage", Appendix C "Low Voltage Equipment Immunity Criteria" and Appendix D "Insulation coordination and selection requirements for SPD". 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 and managed by the National Lightning Protection Standardization Technical Committee (SAC/TC258). This document is drafted by. China Electricity Council, State Grid Electric Power Research Institute Wuhan Nanrui Co., Ltd., Shanghai Electric Power University Science, China Electric Power Research Institute Co., Ltd., China National Machinery Productivity Promotion Center, Tsinghua University, Shanghai University, China Telecom Co., Ltd. Guangdong Research Institute, Jiangsu Huayun Lightning Protection Testing Co., Ltd., Tianjin Zhongli Lightning Protection Technology Co., Ltd., and Shanghai Geotechnical Engineering Testing Center have Co., Ltd., Wuhan University, Hefei Aerospace Electrical Physics Technology Co., Ltd., Nanjing Kuanyong Electronic System Co., Ltd., Zhongshan Xinli Lightning Protection Technology Co., Ltd., Xiamen Saierte Electronics Co., Ltd., Taixing Weite New Material Technology Co., Ltd., China Standardization Association, State Grid Shaanxi Provincial Electric Power Co., Ltd. Power Co., Ltd. Electric Power Research Institute. The main drafters of this document. Lu Chonghui, Yang Yingjian, Yao Ximei, Zhou Qibin, Wu Xiong, Zhang Ping, Guan Xiangshi, Zhuang Chijie, Bian Xiaoyan, Liu Lu, Liu Yucheng, Gu Shanqiang, He Huiwen, He Jinliang, You Zhiyuan, Xue Wenan, Wu Yongkang, Cheng Hao, Li Han, Sun Weiwei, Duan Zemin, Li Jian, Jiang Xinhua, Yang Junbao, Zhang Xianggui, Zhou Tuo, Chenglin. The previous versions of this document and its superseded documents are as follows. ---First published in.2008 as GB/T 21697-2008; ---This is the first revision. Lightning overvoltage in low-voltage distribution lines and electronic systems Insulation coordination

1 Scope

This document specifies the lightning current and lightning overvoltage, insulation coordination and insulation level, insulation test and Its requirements, selection and application of lightning protection measures. This document is applicable to low-voltage distribution lines and electronic circuits with rated AC voltage not greater than 1000V and DC rated voltage not greater than 1500V system.

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 16927.1-2011 High Voltage Test Technology Part 1.General Definition and Test Requirements GB/T 21714.3 Lightning Protection Part 3.Physical Damage to Buildings and Danger to Life GB/T 33588.2 Lightning Protection System Components (LPSC) Part 2.Requirements for air terminals, down conductors and earth electrodes

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 insulationco-ordination After considering the adopted overvoltage protection measures, determine the possible applied voltage on the equipment, and according to the insulation characteristics of the equipment and the possible influence The factors of insulation characteristics determine the insulation strength of equipment from two aspects. safe operation and technical and economic rationality. Note. The "dielectric strength" of the equipment refers to the insulation level as defined in 3.14. [Source. GB/T 311.1-2012, 4.1, with modifications] 3.2 overvoltage Any voltage greater than the peak value of the maximum steady-state voltage under normal operating conditions. [Source. GB/T 16935.1-2008, 3.7, with modifications] 3.3 transient overvoltage transientovervoltage Oscillating or non-oscillating, usually highly damped, overvoltages of only a few milliseconds or less duration. [Source. GB/T 16935.1-2008, 3.7.2, with modifications] 3.4 lightning overvoltage Transient overvoltages occurring anywhere in low-voltage distribution lines and electronic systems due to lightning strikes. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21697-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21697-2022_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 21697-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21697-2022_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 Sales@ChineseStandard.net. 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 21697-2022?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21697-2022 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.