GB/T 21714.3-2015 English PDFUS$2334.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 21714.3-2015: Protection against lightning -- Part 3: Physical damage to structures and life hazard Status: Valid GB/T 21714.3: Historical versions
Basic dataStandard ID: GB/T 21714.3-2015 (GB/T21714.3-2015)Description (Translated English): Protection against lightning -- Part 3: Physical damage to structures and life hazard Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K09 Classification of International Standard: 13.260 Word Count Estimation: 117,136 Date of Issue: 2015-09-11 Date of Implementation: 2016-04-01 Older Standard (superseded by this standard): GB/T 21714.3-2008 Quoted Standard: GB 3836.14-2014; GB/T 21714.1-2015; GB/T 21714.2-2015; GB/T 21714.4-2015; ISO 3864-1-2002; GB/T 2893.1-2013; IEC 60079-10-2-2009; IEC 60079-14-2007; GB 3836.15-2000; GB/T 18216.4-2007; GB 18802.1-2011; GB/T 18802.21-2004; IEC 62561; IEC 62561-1; IEC 62561-3 Adopted Standard: IEC 62305-3-2010, 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 specifies the following requirements: to prevent physical damage to the buildings through the use of lightning protection device (LPS), to avoid the danger due to touch and step voltages close to LPS caused. This standard applies to: a) LPS design of arbitrary height of a building, installation, inspection and maintenance; b) provide protection for personal touch and step voltages caused harm. GB/T 21714.3-2015: Protection against lightning -- Part 3: Physical damage to structures and life hazard---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. Protection against lightning - Part 3. Physical damage to structures and life hazard ICS 13.260 K09 National Standards of People's Republic of China Replacing GB/T 21714.3-2008 (IEC 62305-3.2010, 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 Ⅴ Introduction Ⅵ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 lightning protection system (LPS) 5 4.1 LPS Category 5 4.2 LPS design 5 4.3 steel reinforced concrete building in the continuity of 5 5 External lightning protection device 6 5.1 General requirements 6 Application 6 5.1.1 External LPS 5.1.2 Selection of external LPS 6 5.1.3 Use of natural components 6 5.2 air terminals 6 5.2.1 General requirements 6 5.2.2 Position 7 8 air terminals 5.2.3 for high-rise buildings side anti-flashover 5.2.4 Construction 8 5.2.5 Natural components 8 5.3 deflectors 9 5.3.1 Overview 9 5.3.2 Independent LPS configuration 9 5.3.3 non-independent LPS configuration 10 5.3.4 Construction 10 5.3.5 Natural member 11 5.3.6 Test Connectors 11 5.4 grounding device 11 5.4.1 General requirements 11 5.4.2 conventional grounding means 11 5.4.3 grounding construction 13 5.4.4 Natural grounding 13 13 5.5 Other components 5.5.1 General requirements 13 5.5.2 Fixed 14 5.5.3 connection 14 5.6 Materials and dimensions 14 5.6.1 Materials 14 5.6.2 Size 14 6 Internal lightning protection device 16 16 6.1 General Requirements 6.2 lightning equipotential bonding 17 6.2.1 General requirements 17 6.2.2 lightning and other metal bonding apparatus 17 6.2.3 Lightning equipotential external connection conductive member 18 6.2.4 Lightning equipotential internal connection to the system 18 6.2.5 Lightning equipotential line is connected with the need to protect the building connection 18 6.3 LPS external electrical insulation 19 6.3.1 General requirements 19 6.3.2 Simplified Method 20 6.3.3 detailed methodology 20 7 LPS maintenance and inspection 20 7.1 General 20 Check application 20 7.2 7.3 Check Sequence 21 7.4 Maintenance 21 8 touch and step voltages caused personal injury protection measures 21 8.1 touch voltage protection measures 21 8.2 step voltage protective measures 21 Positioning Appendix A (normative) of 23 air terminals Appendix B (normative) into the cable shield to prevent the risk of sparking the required minimum cross-sectional area 27 Annex C (informative) Calculation of the separation distance s 28 LPS Additional Information Appendix D (normative) risk of explosion of the building 34 Appendix E (Informative Appendix) LPS design, construction, maintenance and inspection guidelines 40 References 110 Figure 1 various types of LPS protection angle method 7 Figure 2 deflectors inside the loop 10 3 various types of earth electrode LPS minimum length l1 12 Protection of space Figure A.1 single vertical rod-like air terminals 23 Figure A.2 vertical air terminals to protect the space of 24 Protection of space Figure A.3 wire type air terminals 24 Figure A.4 use protection angle and ground ball methods, wire mesh type separation space 25 protection Figure A.5 using a grid method and the protection angle method, the mesh wire type non-isolated to protect the space 25 Figure A.6 use by rolling, lightning arrester system design 26 Figure C.1 wire type air terminals, the value of the coefficient kc 28 Figure C.2 multiple drop, the value of the coefficient kc 29 Figure C.3 oblique ridge roof mounted air terminals, the value of the coefficient kc 30 Calculation Example Figure C.4 deflectors each having multiple interconnected rings deflectors spacing of 32 Figure C.5 multiple deflectors mesh air terminals, the value of the coefficient kc 33 Figure E.1 LPS design process 41 Figure E.2 building has cantilevered design components of LPS 45 Figure E.3 overall resistance measurements 46 Equipotential Figure E.4 reinforced concrete structures to connect 47 Figure E.5 allowed under the premise of a typical connection method of reinforced concrete in the main 48 Figure E.6 Examples of primary steel clamp and conductor for 49 Examples Figure E.7 wall of reinforced concrete, steel connection points 49 Example Figure E.8 metal facade as a natural drop, facade bracket 52 E.9 continuous connecting strip windows and metal facade of FIG. 54 Plans E.10 industrial buildings deflectors 55 Figure E.11 reinforced concrete buildings to install a flexible connection between the conductor and the connection conductor installation concrete two-part 56 Figure E.12 design 59 According to Table 2, different heights of air terminals protection angle method Figure E.13 The protective angle method of rod-shaped design of air terminals, air terminals using two separate and independent external LPS 60 Figure E.14 independent external LPS two separate air-termination rod-holder by the horizontal catenary cable 61 Figure E.15 use the rod air terminals, non-independent LPS design examples 62 Example Figure E.16 use a horizontal wire, non-independent LPS air terminals designed with a protective angle method 62 Protective angle method Figure E.17 Design protected area on the inclined surface 63 of the rod air terminals LPS air terminals Figure E.18 complex shape of the building design 64 Figure E.19 The protective angle method, grid method of LPS air terminal air terminal design and overall layout of components 65 Figure E.20 use ball method (r > ht) defined by two parallel air-termination horizontal wire or rod air terminals to protect the space 66 Figure E.21 use mesh air-termination design methods, three examples of non-independent LPS air-termination design 67 Figure E.22 tile lifter four buildings LPS Example 69 Figure E.23 below the slanted roof 20m air terminal building and implicit conductor 71 Figure E.24 use of natural building roof structure member LPS 72 External LPS Figure E.25 height of 60m, flat top, roof mounted fixtures wood or brick building quality installation 73 Figure E.26 conductive coating roof air terminal network (conductive coating layer can not be perforated) 74 Figure E.27 use as a natural part of the exterior walls of reinforced concrete structure outside the building LPS 75 Figure E.28 tack type air terminals for parking roofs 76 Figure E.29 with lightning rods to protect electrical equipment and have no connection to the air terminal metal roof fixture 76 The method of Figure E.30 metal parapet achieve electrical continuity 77 Figure E.31 and air terminals connected to lightning directly stroke prevention metal roof apparatus 79 Lightning example of Figure E.32 with a TV antenna housing 80 Lightning directly stroke prevention device 82 Figure E.33 metal roof means Figure E.34 natural air terminals connected to the rod (metal pipe) and air terminals conductor 83 Chart E.35 metal bridge standing panel 84 Figure E.36 different building highly insulated roof external device 86 LPS Five examples Figure E.37 LPS conductor geometries 86 Figure E.38 only two deflectors and foundation earth electrode LPS structure 88 Figure E.39 between the ground terminal of the building using natural LPS deflectors to connect four detailed examples and test connectors 90 Chart E.40 basis annular grounding different foundation design of the building 93 Figure E.41 A vertical grounding grounding means of two exemplary 94 Mesh grounding device 96 of FIG E.42 factory Figure E.43 equipotential connection installation examples 101 Figure E.44 annular outer conductive member utilizing multi-point grounding into the building when the equipotential bonding bar interconnecting connection example 102 Figure E.45 external conductive parts and power lines, communication lines using an internal multi-conductor connection point into the building drain interconnect Example 103 Figure E.46 above ground level position outside the conductive member into the building multipoint connection example 103 E.47 according to 6.3, the most severe conditions, with the reference point distance l lightning point spacing s calculations 105 Table 1 Relationship between lightning protection level (LPL) and LPS classification (see GB/T 21714.1-2015) between 5 Table 2 maximum angular size of various LPS protection, rolling sphere radius and mesh size of 7 Table 3 air terminals, the minimum thickness of the metal sheet or metal pipes 9 Table 4 Typical distance between the various types of LPS deflectors 10 Table 5 LPS materials and conditions of use 13 Table 6 conductor air terminals, the rod air terminals, down conductor material, shape and the smallest cross-sectional area 15 Table 7 grounding electrode material, shape and size of the smallest 16 Table 8 is connected between the rows, the connection between the strip and the grounding conductor connecting means the smallest cross-sectional area 17 Table 9 conductor connection between the internal metal fitting and the connecting row minimum sectional area 18 Value table 10 External LPS insulation coefficient ki --- 19 Value table 11 External LPS insulation --- coefficient of 19 km Value Table 12 External LPS insulation coefficient kc --- 20 Table B.1 27 to determine the length of the cable shielding according to the conditions of use Table E.1 recommended installation spacing 69 The longest period of 106 Table E.2 LPS inspectionForewordGB/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. Electrical and electronic systems in buildings. This section GB/T 21714 Part 3. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 21714.3-2008 "Lightning Protection Part 3. Physical damage to structures and life-threatening", and GB/T 21714.3-2008 compared to important technical changes are as follows. --- Gives the minimum thickness under the assumption that the problem can not prevent melt air terminal case of sheet metal and metal pipe (see Table 3 Notes a); --- Increasing the copper and stainless steel material suitable as LPS (see Table 5, E.4.3.4); --- Modify some of the cross-sectional area of \u200b\u200bthe conductor of LPS (see 5.6.2 Tables 6 and 7); --- In order to achieve equipotential bonding, increasing the isolation of the spark gap can be used for metal fittings, SPD content for internal systems (see 6.2.1); --- Separation distance calculations to provide a simple and detailed two methods (see 6.3.2,6.3.3); --- An increase in the building of humans and animals due to electric shock injuries protective measures (see Chapter 8); --- Revised building explosion hazard exists in Appendix D of LPS information (see D.6). This section uses the translation method is equivalent to using IEC 62305-3.2010 "Lightning Protection Part 3. Physical damage to structures and life crises risk". Consistency correspondence between this part of international documents and normative references of our files are as follows. --- GB/T 2893.1-2013 Graphical symbols - Safety colors and safety signs - Part 1. safety signs and safety markings provided Accounting principles (ISO 3864-1.2011, MOD) --- GB 18802.1-2011 Low Voltage Surge Protector (SPD) - Part 1. Surge protector performance low-voltage distribution system Requirements and test methods (IEC 61643-1.2005, MOD) --- GB/T 18802.21-2004 voltage surge protective devices - Part 21. telecommunications and signaling networks surge protector (SPD) --- performance requirements and test methods (IEC 61643-21.2000, IDT) --- GB 3836.15-2000 explosive gas atmospheres according to electrical equipment Part 15. Hazardous areas electrical installation (other than mines) (Eqv IEC 60079-14.1996) --- GB/T 18216.4-2007 AC 1000V and 1500V DC low voltage distribution systems electrical safety precautions Testing, measuring or monitoring equipment - Part 4. equipotential grounding resistance and grounding resistors (IEC 61557-4.2007, IDT) Please note that some of the content of this document may involve patents. Release mechanism of the present 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 unit. Ministry of Industry and Information Technology and Telecommunication Metrology Center. Participated in the drafting of this section. Tianjin Force Lightning Protection Technology Co., Ltd., Shanghai Lightning Protection Center, China Telecom Corporation Limited Lake South Branch. The main drafters of this section. Jiang Hao, Meng Yili, Li Dong root, Yao Ye, Zhao Yang, Mei Yongcheng, Takashi. The previous version of this part of the release of case. --- GB/T 21714.3-2008.IntroductionThis section GB/T 21714 for internal and surrounding buildings due to the touch and step voltages cause physical damage and life-threatening proposed Safeguard. For physical damage to the building, the most important and the most effective protection measures for the lightning protection device (LPS). Usually by an external LPS LPS and LPS internal constitution. The role of external LPS. 1) intercept direct lightning strikes on buildings flash (use air terminals); 2) secure boot lightning current into the earth (using deflectors); 3) dispersion of lightning into the ground (use grounding). LPS by internal potentials and other connections, components or external LPS (as defined in 3.2), and other conductive parts within the building to maintain a Predetermined separation distance (within the electrical insulation) to prevent dangerous sparking inside of the building. The main measures to prevent the touch and step voltages resulting from personal injury action. 1) through the conductor insulation or exposed soil surface resistivity is increased to reduce the current through the human body; 2) by physical limitations or warning labels to reduce the occurrence of dangerous touch and step voltages. In the initial design phase of a new building, it should consider free LPS and installation position, and thus take advantage of the electrical conductivity of the building part. This allows the design and construction of integrated device becomes simple, and can improve the appearance of the building geometry, at the same time, with minimal investment LPS capital increase efficiency. Soil resistivity for grounding grid design is critical, and affect the foundation design of the building. To form an effective grounding grid, LPS required Connected with the earth and the proper use of ground steel, once you start construction, the implementation of these measures more difficult. Thus, in the early stage of the project, Should consider the soil resistivity and soil characteristics. In order to obtain the maximum benefit with minimum investment, LPS designers, installers, architectural design, construction personnel necessary Regular consultations. If you need to install the new LPS in existing buildings, LPS should ensure compliance with the relevant guidelines in this section. In addition, LPS and classification Installation location should consider the characteristics of existing buildings. Lightning Protection Part 3. Physical damage to buildings and life-threatening1 ScopeThis section GB/T 21714 is made the following requirements. to prevent physical damage to the buildings through the use of lightning protection device (LPS), Avoid danger due to touch and step voltages close to LPS caused. This section applies to. LPS design a) arbitrary height of a building, installation, inspection and maintenance; b) provide protection for the contact and step voltage caused by a physical hazard. Note 1. LPS at risk of explosion within the building, its specific requirements are being studied. Appendix D Additional information can be used for transitional use. Note 2. LPS does not fail within the building of electrical and electronic systems due to excessive pressure caused provide protection. GB/T 21714.4-2015 view of this situation have a special Requirements. Note 3. Particular requirements for wind turbine lightning protection, see IEC 61400-24.2 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 3836.14-2014 Explosive atmospheres - Part 14. Classification of explosive atmospheres (IEC 60079-10-1.2008, IDT) GB/T 21714.1-2015 lightning protection - Part 1. General (IEC 62305-1.2010, IDT) GB/T 21714.2-2015 Lightning Part 2. Risk management (IEC 62305-2.2010, IDT) GB/T 21714.4-2015 Lightning Part 4. Electrical and electronic systems within structures (IEC 62305-4.2010, IDT) ISO 3864-1.2002 Graphical symbols - Safety colors and safety signs - Part 1. workplaces and public areas of safety signs Design Principles (Graphicalsymbols-Safetycoloursandsafetysigns-Part 1. Designprinciplesforsafety signsandsafetymarkings) IEC 60079-10-2.2009 Explosive atmospheres - Part 10-2. Regional classification of combustible dust ring (Explosiveatmos- pheres-Part 10-2. Classificationofareas-Combustibledustatmospheres) IEC 60079-14.2007 Explosive atmospheres Electrical installations design, selection and installation (Explosiveatmospheres-Part 14. Electricalinstalationsdesign, selectionanderection) IEC 61557-4 1000V AC and 1500V DC low voltage distribution systems for electrical safety protection measures for testing, measuring Or monitoring equipment - Part 4. equipotential grounding resistance and grounding resistance (Electricalsafetyinlowvoltagedistributionsys- temsupto1000Va.c.and1500Vd.c.-Equipmentfortesting, measuringormonitoringofprotec- tivemeasures-Part 4. Resistanceofearthconnectionandequipotentialbonding) IEC 61643-1 low voltage surge protector (SPD) - Part 1. low-voltage distribution systems with a surge protector performance requirements and test Methods (Low-voltagesurgeprotectivedevices-Part 1. Surgeprotectivedevicesconnectedtolow-voltage powerdistributionsystems-Requirementsandtests) IEC 61643-21 low-voltage surge protection device (SPD) Part 21. Surge protection telecommunications and signaling networks (SPD) for a performance Sum Test Method (Lowvoltagesurgeprotectivedevices-Part 21. Surgeprotectivedevicesconnectedto ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 21714.3-2015_English be delivered?Answer: Upon your order, we will start to translate GB/T 21714.3-2015_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. 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