FprEN IEC 62305-3:2024
(Main)Protection against lightning - Part 3: Physical damage to structures and life hazard
Protection against lightning - Part 3: Physical damage to structures and life hazard
IEC 62305-3:2024 provides the requirements for protection of a structure against physical damage by means of a lightning protection system (LPS), and for protection against injury to human beings due to touch and step voltages in the vicinity of an LPS (see IEC 62305-1). This document is applicable to the: a) design, installation, inspection and maintenance of an LPS for structures without limitation of their height, b) establishment of measures for protection against injury to human beings primarily due to touch and step voltages. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Minimum thicknesses of metal sheets or metal pipes are given in Table 4 for air-termination systems where it is necessary to prevent hot-spot problems. Maximum temperature rises ΔT (K) and time duration t50 (s) for different thicknesses and long strokes are also given. b) Cross-reference to the IEC 62561 series is made for the use of reliable, stable, safe and appropriate LPS components. c) The application of two methods – general and simplified – for separation distance calculation is clarified. d) Some changes to the requirements for continuity of steel reinforcement are made. e) Annex C is revised to address comments from IEC subcommittee 31J. f) Revision of positioning of air-termination conductors are modified according to the three accepted methods. A more precise description of the methods for positioning of the air-termination systems are made according to the complexity of structures to be protected. The main text has been simplified, Annex A has been deleted and all detailed information has been moved to Annex D. g) Information on the protection of green roofs is introduced in Annex D. h) Information on the protection of protruding parts on facades of tall buildings is introduced in Annex D. i) a new definition of “electrically insulated LPS” has been introduced to distinguish it from an LPS both electrically and physically isolated from the structure, with a slight modification of the other LPS definitions.
Blitzschutz - Teil 3: Schutz von baulichen Anlagen und Personen
Protection contre la foudre - Partie 3: Dommages physiques sur les structures et risques humains
L'IEC 62305-3:2024 spécifie les exigences pour la protection d'une structure contre les dommages physiques par un système de protection contre la foudre (SPF) et pour la protection contre les blessures d'êtres humains dues aux tensions de contact et de pas à proximité d'un SPF (voir l'IEC 62305-1). Le présent document s'applique: a) à la conception, l'installation, l'inspection et la maintenance d'un SPF pour des structures, sans limitation de leur hauteur; b) à la mise en œuvre de mesures pour la protection contre les blessures d'êtres humains essentiellement dues aux tensions de contact et de pas. Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) les épaisseurs minimales des tôles ou canalisations métalliques sont indiquées dans le Tableau 4 pour les dispositifs de capture à utiliser si des mesures de prévention contre les problèmes de points chauds se révèlent nécessaires. Les échauffements maximaux ΔT (K) et la durée t50 (s) pour différentes épaisseurs et pour des coups de longue durée sont également donnés; b) un renvoi à la série IEC 62561 est établi en ce qui concerne l'utilisation de composants appropriés fiables, stables et sûrs du système de protection contre la foudre (SPF); c) l'application de deux méthodes (générale et simplifiée) de calcul de la distance de séparation est clarifiée; d) certaines exigences relatives à la continuité des armatures en acier ont été modifiées; e) l'Annexe C est révisée pour tenir compte des remarques formulées par le sous-comité 31J de l'IEC; f) Le positionnement des conducteurs de capture a été révisé en fonction des trois méthodes admises. Les méthodes de positionnement des dispositifs de capture sont décrites avec davantage de précision compte tenu de la complexité des structures à protéger. Le texte principal a été simplifié, l'Annexe A a été supprimée et toutes les informations supplémentaires ont été déplacées à l'Annexe D; g) des informations relatives à la protection de toitures végétalisées ont été ajoutées à l'Annexe D; h) des informations relatives à la protection des parties saillantes sur les façades de bâtiments hauts ont été ajoutées à l'Annexe D; i) une nouvelle définition de la “SPF isolée électriquement” a été introduite pour la distinguer de la SPF isolée électriquement et physiquement de la structure, avec une légère modification des autres définitions de la SPF.
Zaščita pred delovanjem strele - 3. del: Fizična škoda na zgradbah in življenjska ogroženost
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62305-3:2023
01-december-2023
Zaščita pred delovanjem strele - 3. del: Fizična škoda na zgradbah in življenjska
ogroženost
Protection against lightning - Part 3: Physical damage to structures and life hazard
Blitzschutz - Teil 3: Schutz von baulichen Anlagen und Personen
Protection contre la foudre - Partie 3: Dommages physiques sur les structures et risques
humains
Ta slovenski standard je istoveten z: prEN IEC 62305-3:2023
ICS:
91.120.40 Zaščita pred strelo Lightning protection
oSIST prEN IEC 62305-3:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 62305-3:2023
oSIST prEN IEC 62305-3:2023
81/735/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62305-3 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-10-13 2023-12-08
SUPERSEDES DOCUMENTS:
81/688/CDV, 81/713B/RVC
IEC TC 81 : LIGHTNING PROTECTION
SECRETARIAT: SECRETARY:
Italy Mrs Marina Bernardi
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
SC 31J,SC 37A,TC 64,TC 88
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
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The CENELEC members are invited to vote through the
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This document is still under study and subject to change. It should not be used for reference purposes.
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clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Protection against lightning - Part 3: Physical damage to structures and life hazard
PROPOSED STABILITY DATE: 2027
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You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
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oSIST prEN IEC 62305-3:2023
IEC CDV 62305-3 © IEC 2023 2 81/735/CDV
NOTE FROM TC/SC OFFICERS:
the document "with changes" is uploaded as help, with tracking of all modifications.
oSIST prEN IEC 62305-3:2023
81/735/CDV 3 IEC CDV 62305-3 © IEC 2023
2 CONTENTS
4 FOREWORD . 8
5 INTRODUCTION . 10
6 1 Scope . 11
7 2 Normative references . 11
8 3 Terms and definitions . 12
9 4 Lightning protection system (LPS) . 17
10 4.1 Class of LPS . 17
11 4.2 Design of the LPS . 18
12 5 External lightning protection system . 18
13 5.1 General . 18
14 5.1.1 Application of an external LPS . 18
15 5.1.2 Application of an isolated LPS or an electrically insulated LPS . 18
16 5.1.3 Use of natural components . 19
17 5.2 Air-termination systems . 19
18 5.2.1 General . 19
19 5.2.2 Positioning . 19
20 5.2.3 Air terminations against flashes to the side of tall structures . 23
21 5.2.4 Construction . 24
22 5.2.5 Natural components . 24
23 5.3 Down-conductor systems . 27
24 5.3.1 General . 27
25 5.3.2 Positioning of an isolated LPS . 27
26 5.3.3 Positioning of an attached LPS . 27
27 5.3.4 Construction . 28
28 5.3.5 Natural components . 29
29 5.3.6 Test joints and test points . 30
30 5.4 Earth-termination system . 31
31 5.4.1 General . 31
32 5.4.2 Earthing arrangement in general conditions . 31
33 5.4.3 Installation of earth electrodes . 33
34 5.4.4 Natural earth electrodes . 34
35 5.5 Components . 34
36 5.5.1 General . 34
37 5.5.2 Fixing . 35
38 5.5.3 Connections . 35
39 5.5.4 Insulating components . 36
40 5.6 Materials and dimensions . 36
41 5.6.1 Materials . 36
42 5.6.2 Dimensions . 36
43 6 Internal lightning protection system . 39
44 6.1 General . 39
45 6.2 Lightning equipotential bonding . 39
46 6.2.1 General . 39
47 6.2.2 Lightning equipotential bonding for metal installations . 40
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48 6.2.3 Lightning equipotential bonding for external conductive parts . 41
49 6.2.4 Lightning equipotential bonding for internal systems . 41
50 6.2.5 Lightning equipotential bonding for lines connected to the structure to
51 be protected . 42
52 6.3 Separation distance . 42
53 6.3.1 General approach . 42
54 6.3.2 Simplified approach . 44
55 7 Maintenance and inspection of an LPS . 44
56 7.1 General . 44
57 7.2 Maintenance . 44
58 7.3 Objective of inspections . 45
59 7.4 Need for inspection . 45
60 8 Protection measures against injury to human beings due to touch and step
61 voltages . 46
62 8.1 Protection measures against touch voltages . 46
63 8.2 Protection measures against step voltages . 46
64 Annex A (normative) Minimum cross-section of the entering cable screen to avoid
65 dangerous sparking . 48
66 Annex B (informative) Evaluation of the separation distance s . 49
67 Annex C (normative) Additional information for LPSs in the case of structures with a
68 risk of explosion . 55
69 C.1 General . 55
70 C.2 Basic requirements . 55
71 C.2.1 General . 55
72 C.2.2 Required information . 55
73 C.2.3 Earthing . 55
74 C.2.4 Equipotential bonding . 56
75 C.3 Structures containing solid explosive material . 56
76 C.4 Structures containing hazardous areas . 56
77 C.4.1 General . 56
78 C.4.2 Structures containing zones 2 and 22 . 57
79 C.4.3 Structures containing zones 1 and 21 . 57
80 C.4.4 Structures containing zones 0 and 20 . 58
81 C.4.5 Specific applications . 58
82 C.5 Maintenance and inspection . 59
83 C.5.1 General . 59
84 C.5.2 General requirements . 59
85 C.5.3 Qualifications . 59
86 C.5.4 Inspection requirements . 59
87 C.5.5 Electrical testing requirements . 60
88 C.5.6 Earthing resistance test methods . 60
89 C.5.7 Surge protection . 60
90 C.5.8 Repairs . 61
91 C.5.9 Records and documentation . 61
92 Annex D (informative) Explanatory text concerning the design, construction,
93 maintenance and inspection of lightning protection systems . 62
94 D.1 General . 62
95 D.2 Structure of Annex D . 62
96 D.3 Additional information . 62
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97 D.4 Design of lightning protection systems (LPSs) . 62
98 D.4.1 General remarks . 62
99 D.4.2 Design of the LPS .
...
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