EN 62305-3:2011

SLOVENSKI STANDARD
01-maj-2011
1DGRPHãþD
SIST EN 62305-3:2006
SIST EN 62305-3:2006/A11:2009
=DãþLWDSUHGGHORYDQMHPVWUHOHGHO)L]LþQDãNRGDQD]JUDGEDKLQQHYDUQRVW]D
åLYDELWMD,(&VSUHPHQMHQ
Protection against lightning - Part 3: Physical damages 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: EN 62305-3:2011
ICS:
91.120.40 =DãþLWDSUHGVWUHOR Lightning protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62305-3
NORME EUROPÉENNE
March 2011
EUROPÄISCHE NORM
ICS 29.020; 91.120.40 Supersedes EN 62305-3:2006 + corr. Nov.2006 + corr. Sep.2008 + A11:2009

English version
Protection against lightning -
Part 3: Physical damage to structures and life hazard
(IEC 62305-3:2010, modified)
Protection contre la foudre -  Blitzschutz -
Partie 3: Dommages physiques sur les Teil 3: Schutz von baulichen Anlagen und
structures et risques humains Personen
(CEI 62305-3:2010, modifiée) (IEC 62305-3:2010, modifiziert)

This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62305-3:2011 E
Foreword
The text of the International Standard IEC 62305-3:2010, prepared by IEC TC 81, Lightning protection,
together with common modifications prepared by the Technical Committee CENELEC TC 81X, Lightning
protection, was submitted to the formal vote and was approved by CENELEC as EN 62305-3 on
2011-01-02.
This European Standard supersedes EN 62305-3:2006 + corr. Nov.2006 + corr. Sep.2008 + A11:2009.
This EN 62305-3:2011 includes the following significant technical changes with respect to
EN 62305-3:2006 + corr. Nov.2006 + corr. Sep.2008 + A11:2009:
1) Minimum thicknesses of metal sheets or metal pipes given in Table 3 for air-termination systems are
assumed as not able to prevent hot-spot problems.
2) Steel with electro-deposited copper is introduced as material suitable for LPS.
3) Some cross-sectional areas of LPS conductors were slightly modified.
4) For bonding purposes, isolating spark gaps are used for metal installations and SPD for internal
systems.
5) Two methods – simplified and detailed – are provided for evaluation of separation distance.
6) Protection measures against injuries of living beings due to electric shock are considered also inside
the structure.
7) Improved information for LPS in the case of structures with a risk of explosion are given in Annex D
(normative).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-01-02
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-02
__________
Endorsement notice
The text of the International Standard IEC 62305-3:2010 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
[2] IEC 61400-24 NOTE  Harmonized as EN 61400-24.

COMMON MODIFICATIONS
Through the complete document:
Replace all references to IEC 62305 by references to EN 62305.

- 3 - EN 62305-3:2011
Replace all references to IEC 62561 by references to EN 50164.
2 Normative references
Replace this subclause by:
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 50164-1 Lightning Protection Components (LPC) – Part 1: Requirements for connection
components
EN 50164-2 Lightning Protection Components (LPC) – Part 2: Requirements for conductors
and earth electrodes
EN 50164-3 Lightning Protection Components (LPC) – Part 3: Requirements for isolating
spark gaps
EN 50164-4 Lightning Protection Components (LPC) – Part 4: Requirements for conductor
fasteners
EN 50164-5 Lightning Protection Components (LPC) – Part 5: Requirements for earth
electrode inspection housings and earth electrode seals
EN 50164-6 Lightning Protection Components (LPC) – Part 6: Requirements for lightning
strike counters
EN 50164-7 Lightning Protection Components (LPC) – Part 7: Requirements for earthing
enhancing compounds
NOTE  The above mentioned standards EN 50164 series will ultimately be replaced by EN 62561 series. EN 50164 series will still
be valid for 72 months from the issuing date of each part of the EN 50164 series.
EN 60079-10-1:2009 Explosive atmospheres – Part 10-1: Classification of areas – Explosive gas
atmospheres (IEC 60079-10-1:2008)
EN 60079-10-2:2009 Explosive atmospheres – Part 10-2: Classification of areas – Combustible dust
atmospheres (IEC 60079-10-2:2009)
EN 60079-14:2008 Explosive atmospheres – Part 14: Electrical installations design, selection and
erection (IEC 60079-14:2007)
EN 61557-4 Electrical safety in low voltage distribution systems up to 1 000 V a.c. and
1 500 V d.c. – Equipment for testing, measuring or monitoring of protective
measures – Part 4: Resistance of earth connection and equipotential bonding
(IEC 61557-4)
EN 61643-11 Low-voltage surge protective devices – Part 1: Surge protective devices
connected to low-voltage power distribution systems – Requirements and tests
(IEC 61643-1)
EN 61643-21 Low voltage surge protective devices – Part 21: Surge protective devices
connected to telecommunications and signalling networks – Performance
requirements and testing methods (IEC 61643-21)
EN 62305-1:2011 Protection against lightning – Part 1: General principles (IEC 62305-1:2010,
modified)
EN 62305-2:2011 Protection against lightning – Part 2: Risk management (IEC 62305-2:2010,
modified)
EN 62305-4:2011 Protection against lightning – Part 4: Electrical and electronic systems within
structures (IEC 62305-4:2010, modified)

1)
EN 62561 series Lightning Protection System Components (LPSC) (IEC 62561 series)
2)
EN 62561-1 Lightning Protection System Components (LPSC) – Part 1: Requirements for
connection components (IEC 62561)
2)
EN 62561-3 Lightning Protection System Components (LPSC) – Part 3: Requirements for
isolating spark gaps (IEC 62561-3)
ISO 3864-1 Graphical symbols – Safety colours and safety signs – Part 1: Design principles
for safety signs in workplaces and public areas
3 Terms and definitions
Definition 3.16
Add at the end of the paragraph: “… as defined in the EN 50164 series.”
Definition 3.17
Add at the end of the paragraph: “… as defined in the EN 50164 series.”
4 Lightning protection system (LPS)
4.3 Continuity of steelwork in reinforced concrete structures
Replace NOTE 2 by:
NOTE 2  When the continuity of steelwork in reinforced concrete is intended to be established by clamping, specifically designed
clamps complying with and tested according to EN 50164-1, should be used.
5 External lightning protection system
5.5.1 General
After the first paragraph, add the following paragraph:
All components shall comply with the EN 50164 series.
5.5.3 Connections
nd
In the 2 paragraph, replace “the future IEC 62561-1” with “EN 50164-1”.
5.6.2 Dimensions
Replace the first paragraph by:
Materials, configurations and minimum cross-sectional areas of air-termination conductors, air-termination
rods, down-conductors and earth lead-in rods are given in Table 6 and shall comply with the requirements
and tests according to the EN 50164 series.
Add at the beginning of the second paragraph “Materials, …” and replace at the end of the paragraph
“IEC 62561 series” with “EN 50164 series”.
In Table 7, delete the NOTE “f”.

1)
In preparation.
2)
At draft stage.
- 5 - EN 62305-3:2011
Annex E (informative) Guidelines for the design, construction, maintenance and
inspection of lightning protection systems
E.4.2.3.2 Mechanical design
In the first sentence of the NOTE, replace “may” with “should” and “IEC 62561” with “EN 50164”.
In the last paragraph, replace “could” with “should” and “IEC 62561” with “EN 50164”.
E.4.3.3 Welding or clamping to the steel-reinforcing rods
In the NOTE, replace “IEC 62561 series of standards are suitable” with “EN 50164 series of standards
should be used”.
E.4.3.7 Down-conductors
th
Replace the 12 paragraph (i.e. after Figure E.9) by:
“If steel structures are used as down-conductors, every steel column should be connected to the steel
reinforcing rods of the concrete foundation according to Figure E.7 by purposely designed bonding points
complying with EN 50164 series.”
E.5.2.4.1 General information
Replace the first paragraph by:
“The maximum permissible temperature for a conductor will not be exceeded if its cross-section complies
with Table 6 and the EN 50164 series.”
E.5.2.4.2 Non-isolated air-termination
nd
After the 2 paragraph, add the following NOTE:
NOTE  For more details see EN 50164 series.
E.5.5 Components
st
Replace the 1 paragraph by:
“Components of LPS should withstand the electromagnetic effects of lightning current and predictable
accidental stresses without being damaged. This can be achieved by choosing components that have
successfully been tested in accordance with the EN 50164 series.
All components shall comply with the EN 50164 series.”
E.5.6.1 Mechanical design
th
At the end of the 6 paragraph, add the following:
“…according to the EN 50164 series.”
E.5.6.2.1 Materials
st
At the end of the 1 line, add the following:
“and the EN 50164 series”
E.5.6.2.2.1 Metals in soil and air
Replace the NOTE by:
NOTE  Isolating spark gaps having a protection level U of 2,5 kV and a minimum I of 50 kA (10/350 µs) complying with
p imp
EN 50164-3 are suitable.
IEC 62305-3 ®
Edition 2.0 2010-12
INTERNATIONAL
STANDARD
colour
inside
Protection against lightning –
Part 3: Physical damage to structures and life hazard

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XG
ICS 29.020; 91.120.40 ISBN 978-2-88912-282-0
– 2 – 62305-3 Ó IEC:2010(E)
CONTENTS
FOREW ORD . 7
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 12
4 Lightning protection system (LPS) . 15
4.1 Class of LPS . 15
4.2 Design of the LPS . 16
4.3 Continuity of steelwork in reinforced concrete structures . 16
5 External lightning protection system . 17
5.1 General . 17
5.1.1 Application of an external LPS . 17
5.1.2 Choice of external LPS . 17
5.1.3 Use of natural components . 17
5.2 Air-termination systems . 18
5.2.1 General . 18
5.2.2 Positioning . 18
5.2.3 Air-terminations against flashes to the side of tall structures . 19
5.2.4 Construction .
...