GB/T 21714.2-2015 English PDFUS$1594.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21714.2-2015: Protection against lightning -- Part 2: Risk management Status: Valid GB/T 21714.2: Historical versions
Basic dataStandard ID: GB/T 21714.2-2015 (GB/T21714.2-2015)Description (Translated English): Protection against lightning -- Part 2: Risk management Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K09 Classification of International Standard: 13.26 Word Count Estimation: 80,889 Date of Issue: 2015-09-11 Date of Implementation: 2016-04-01 Older Standard (superseded by this standard): GB/T 21714.2-2008 Quoted Standard: GB/T 21714.1-2015; GB/T 21714.3-2015; GB/T 21714.4-2015 Adopted Standard: IEC 62305-2-2010, IDT Regulation (derived from): National Standard Announcement 2015 No.25 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard applies to the lightning risk assessment of buildings. This standard gives the calculated risk processes. Once you have selected the allowable upper limit of risk, you can select the appropriate protective measures through the process to reduce the risk to below the permissible limits. GB/T 21714.2-2015: Protection against lightning -- Part 2: Risk management---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.(Lightning Part 2. Risk management) ICS 13.260 K09 National Standards of People's Republic of China Replacing GB/T 21714.2-2008 Lightning Protection Part 2. Risk management (IEC 62305-2.2010, IDT) Issued on. 2015-09-11 2016-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released Table of ContentsIntroduction Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 3.1 Terms and definitions Symbols 6 3.2 4 Some Basic Concepts 10 4.1 damages and losses 10 4.2 Risk and risk components 11 12 4.3 Composition of various risks Risk Management 14 5 5.1 Basic Steps 14 Problem building aspect to be considered when assessing the risk of 5.2 of 14 5.3 Risk tolerance value RT 14 5.4 assess the need for concrete steps to mine 14 5.5 Steps to take protective measures to assess the cost-effectiveness of 15 5.6 protective measures 17 Select 5.7 protective measures 17 6 risk assessment component 17 17 6.1 Basic expressions 6.2 Assessment lightning Building (Cause of damage S1) risk components 18 6.3 Assessment of lightning nearby buildings (Causes damage S2) risk components 19 6.4 Assessment lightning home line (Causes damage S3) risk components 19 6.5 Assessment lightning line near home (Genesis damage S4) risk components 19 6.6 Building risk component summary 20 6.7 partition building ZS 20 6.8 lines partition SL 20 Risk assessment over 6.9 Buildings partition component 21 6.10 Economic Loss (L4) 21 Cost-benefit analysis NX estimates Annex A (informative) The annual average number of hazardous events 23 Estimate the probability of Annex B (informative) Damage PX 31 Annex C (informative) Estimation of various buildings LX loss 38 Estimate Annex D (informative) loss cost 45 Annex E (informative) Examples of building assessment 46 References 73 1 Determine whether you need protection and choice of protective measures in a flow chart 16 2 to take protective measures to assess the cost-effectiveness of the Scheme 17 Figure A.1 intercepted isolated area of \u200b\u200bthe building 24 AD Figure A.2 complex shape of the building 25 Figure A.3 using different methods to determine the structure of a given cross-sectional area of \u200b\u200b26 to close Part of the cross-sectional area AD income Figure A.4 buildings - Calculation 27 Figure A.5 interception area (AD, AM, AI, AL) 30 Figure E.1 Country house 46 Figure E.2 office 51 Figure E.3 hospital 58 Figure E.4 apartment building 69 Table 1 lightning point, the damage causes of the various possible types of damages and loss of control list 10 The risk of loss risks of various types of components to be considered in Table 2 Building 13 Table 3 risk factors affecting the building component 13 Table 4 Risk tolerance value RT typical value of 14 Table 5 estimate the parameters of the risk component of the building used by 18 Table 6 Causes of injury and damage to various risk types listed component 20 Table A.1 building location factor CD 27 Table A.2 line installation factor CI 29 Table A.3 line type factor CT 29 Table A.4 line CE 29 Environmental Factors Table B.1 building due to the probability of lightning touch and step voltages cause harm humans and animals PTA 31 Table B.2 PB and LPS Lightning Protection Level (LPL) Relationship 32 PSPD value table B.3 by LPL selected SPD at 32 Table B.4 CLD and CLI and shielding, grounding, isolation conditions of the relationship 33 Table relationships B.5 internal wiring and KS3 34 Probability Table B.6 line due to lightning home contact voltage cause harm humans and animals PTU 35 PEB value 35 Table B.7 by LPL selected when the SPD Table B.8 probability PLD relationship with the cable shield resistance RS and the device withstand voltage UW 35 Table B.9 probability PLI relationship with line type and device withstand voltage rating UW 37 Table C.1 loss type L1. loss rate of each partition 38 Table C.2 type of loss L1. LT, LF and LO typical average of 39 Table C.3 different types of soil or floor surface reduction factor rt 39 Table C.4 various measures to reduce the consequences of fire reduction factor rp 40 Table C.5 reduction factor rf relationship building with fire or explosion hazard degree 40 Table C.6 special danger, has led to the loss of a relative increase factor hz 41 Table C.7 loss types L2. loss rate of each partition 41 Table C.8 loss types L2. LF LO and the typical average of 41 Table C.9 loss type L3. loss rate of each partition 42 Table C.10 loss type L3. LF typical average of 42 Table C.11 type of loss L4. loss rate of each partition 42 Table C.12 type of loss L4. Typical mean LT, LF and LO 43 Characteristics of the building and the surrounding environment Table E.1 47 Table E.2 supply line 47 Table E.3 communication line (TLC) 47 Table E.4 Z2 area (indoors) effective factor 48 Table E.5 building area intercepted and line 49 Table E.6 expected number of 49-year risk of incident Table E.7 unprotected buildings risk R1 (value × 10-5) 50 Table E.8 take protective measures after various risks risk component values \u200b\u200bR1 51 Characteristics of the building and the surrounding environment Table E.9 52 Table E.10 supply line 52 Table E.11 communication line (TLC) 52 Table E.12 Distribution of staff 53 districts Table E.13 Z1 zone (outdoor entrance area) efficiency factor 54 Table E.14 Z2 zone (the garden) effective factor 54 Table E.15 Z3 zone (CRDA) effective factor 54 Table E.16 Z4 area (office) efficiency factor 55 Table E.17 Z5 zone (computer center) effective factor 56 Table E.18 building area intercepted and line 56 Table E.19 estimated annual number of dangerous incidents 57 Table E.20 unprotected buildings risk R1 (value × 10-5) 57 R1 value table E.21 two kinds of protection obtained by the scheme (value × 10-5) 58 Characteristics of the building and the surrounding environment 59 Table E.22 Table E.23 supply line 59 Table E.24 communication line (TLC) 60 Chart E.25 Distribution of 61 districts Table E.26 Z1 zone (outdoor) efficiency factor 61 Table E.27 Z2 area (ward) efficiency factor 62 Table E.28 Z3 zone (operating room) efficiency factor 62 Table E.29 Z4 zone (ICU) of a valid factor 63 Table E.30 building area intercepted and line 64 Table E.31 estimated annual number of dangerous incidents 64 Probability table E.32 unprotected buildings PX 65 Table E.33 unprotected buildings risk R1 (value × 10-5) 65 Table E.34 take the program a) risk-R1 (value × 10-5) 66 Table E.35 take the program b) risk-R1 (value × 10-5) 66 Table E.36 take the program c) risk-R1 (value × 10-5) 67 Table costs CL (unprotected) E.37 losses and CRL (protected) 68 Table E.38 ratio and protection measures 68 Table E.39 protective measures cost CP and the average annual cost of CPM (in United States dollars) 68 Table E.40 annual savings (in United States dollars) 69 Characteristics of the building and the surrounding environment 69 Table E.41 Table E.42 supply line 70 Table E.43 communication line (TLC) 70 Table E.44 Z2 area (indoors) effective factor 71 Table E.45 Risk R1 under various protective measures apartment building 72ForewordGB/T 21714 "Lightning protection" consists of the following four components. --- Part 1. General; --- Part 2. Risk management; --- Part 3. Physical damage to structures and life-threatening; --- Part 4. the building of electrical and electronic systems. This section GB/T 21714 Part 2. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 21714.2-2008 "Lightning protection - Part 2. Risk management." And GB/T 21714.2-2008 phase Ratio, the main technical changes are as follows. --- Remove the connection to the building services risk assessment content. --- Supplementary considered the situation in the building of human and animal electric shock (see section 4.2.2 "RA" component). --- Allowable risk of loss of cultural heritage values \u200b\u200bfrom 10-3 down to 10-4. Introducing economic risk of loss allowable value RT = 10-3, if you can not Provide cost-effective data analysis, you can use this value (see final paragraph 1 5.3 and 6.10). --- Additional considerations for surrounding buildings or environmental collateral damage (see Note 1 to 5.4 Note 3). --- Calculation formula the following parameters were modified. Intercept area 1) lightning strikes nearby buildings [see equation (A.2), formula (A.3)]; 2) cut-off area near the lightning line or lines [see equation (A.7), formula (A.9) and formula (A.11)]; 3 probability of a lightning strike caused the damage) [see equation (B.1) ~ formula (B.4), formula (B.7) and formula (B.8)]; 4) having a loss factor explosion hazards specific buildings (see Table C.5); 5) Building partition risk component (see Table 6 in the formula); 6) loss cost [see equation (D.1) ~ formula (D.6)]. --- Given selection in each case relative loss amount (see Table C.2, table C.8, Table C.10 and Table C.12). --- Added impact resistance of the equipment considered to 1kV voltage rating (see A.4, A.5, table B.8, table B.9). This section uses the translation method is equivalent to using IEC 62305-2.2010 "Lightning protection - Part 2. Risk management." This part made the following editorial changes. --- Supplementary term 3.1.49, which is conducive to the terms and 3.1.52 3.1.50,3.1.51 understanding and application of the corresponding original rewrite The content is too long; --- On the part of the terms and definitions added comments, easier to understand and apply. Notes to prompt you to increase by a corresponding footnote; --- For text formulas (14) and Equation (15) forms of expression were properly modified text formulas and expressions adjusted to two Column item. Expression of the original text is clearly incompatible with the formula. Please note that some content of this document may involve patents, the issuing authority of this document does not assume responsibility for the identification of these patents. This part of the National Lightning Protection Standardization Technical Committee (SAC/TC258) and focal points. This section is responsible for drafting. Guangdong Lightning Protection Center. Participated in the drafting of this section. Tianjin Force Lightning Protection Technology Co., Ltd., Dongguan City, Wei Lightning Protection Equipment Co., Ltd. The main drafters of this section. Huang Zhihui, Chen Lvwen, read Zhang, Zhang Yuanpeng, Liu Quanzhen. This part of the standard replaces the previous editions are. --- GB/T 21714.2-2008.IntroductionGround lightning strike may cause harm to buildings and lines. Such hazards can lead to. --- Buildings and storage was damaged; --- Related electrical and electronic systems failure; --- Inside buildings or in the vicinity of human and animal damage. Its storage building was destroyed and the consequences of electrical and electronic systems failure could ruin buildings around the objects or their environment. In order to reduce the losses caused by lightning, may need to take protective measures. Risk assessment should be determined by the need to take protective Protective measures and to what extent. This section defines risk as the interior of the building caused by lightning may be lost annually, depending on. --- Impact on building the average number of lightning strikes; --- Once influential lightning strikes cause damage probability; --- First damage caused by the loss of the average relative amount (ie, loss). Lightning impact of the building are the following. --- Lightning hit the building; --- Hit nearby buildings, or directly hit home line (such as power lines, communication lines) or near the line of lightning. Building or lines connected to the building struck by lightning can cause physical damage and personal injury. Not only the buildings struck by lightning or line will lead From electrical and electronic systems failure, or line and also because of lightning nearby buildings resistive and inductive coupling with lightning current between these systems Coupling over-voltage caused by electrical and electronic systems failure. In addition, users of electrical equipment and power lines due to lightning over-voltage failure can also cause electrical devices operating over Voltage. Note. GB/T 21714 does not deal with electrical and electronic systems due to interference and malfunction, interference should refer to GB/T 17626.5 [1] 1) The annual average number of lightning affect buildings and line depends both on ground flash density and their locations, but also on their size, nature And surroundings. The probability of lightning damage depends on both the type and effectiveness of the protective measures taken, but also on buildings, and the lightning current line characteristic. Each impairment losses annual average relative amount (ie, loss), depending on the extent of the damage and a lightning could lead to as a result of. Protective effect depends on the characteristics of each of the protective measures, the probability of damage can be reduced by protective or loss. To eliminate all avoidable risk, it may decide to pursue various straight lightning protection measures without considering the results of the risk assessment. 1) The numbers in brackets refer to numbers listed in the literature. Using the latest version of the equivalent to using the national standard, the corresponding modified reference --- Editor. Lightning Protection Part 2. Risk management1 ScopeThis section GB/T 21714 applies to the lightning risk assessment of buildings. This section presents the calculation of risk processes. Once you have selected the allowable upper limit of risk, you can select the appropriate protective measures through the process, In order to reduce the risk to below the permissible limits.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 21714.1-2015 lightning protection - Part 1. General (IEC 62305-1.2010, IDT) GB/T 21714.3-2015 Lightning Protection Part 3. Physical damage to structures and life hazard (IEC 62305-3.2010, IDT) GB/T 21714.4-2015 Lightning Part 4. Electrical and electronic systems within structures (IEC 62305-4.2010, IDT) 3 Terms, definitions and symbols 3.1 Terms and Definitions The following terms and definitions apply to this document. 3.1.1 The need to protect buildings structure to be protected Basis having GB/T 21714 buildings were lightning protection effect. Note. the need to protect the building may be part of a larger building. 3.1.2 Buildings structure swith risk of explosion having explosive There are solid containing explosives or press GB 3836.14-2014 [2] and IEC 60079-10-2.2009 [3] identified as hazardous areas built Buildings. 3.1.3 Constitute a danger to the environment buildings structure dangerous to the environment Lightning can cause biological contamination, chemical spills, radioactive contamination of the building (such as chemical plants, petrochemical plants, nuclear power plants, etc.). 3.1.4 Urban environment urban environment High building density areas or with high-rise buildings in the densely populated communities. Note. The town center is an example of the urban environment. 3.1.5 Suburban environments suburban environment Building medium density areas. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21714.2-2015_English be delivered?Answer: Upon your order, we will start to translate GB/T 21714.2-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 21714.2-2015_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 21714.2-2015_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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