EN 62305-2:2006

Protection against lightning - Part 2: Risk management

Applicable to risk assessment for a structure or for a service due to lightning flashes to earth. Its purpose is to provide a procedure for the evaluation of such a risk. Once an upper tolerable limit for the risk has been selected, this procedure allows the selection of appropriate protection measures to be adopted to reduce the risk to or below the tolerable limit. Informative annex with simplified software for risk assessment for structures.

Blitzschutz - Teil 2: Risiko-Management

Protection contre la foudre - Partie 2: Evaluation du risque

Applicable à l'évaluation du risque, dans une structure ou dans un service, dû aux coups de foudre au sol. Elle est destinée à proposer une procédure d'évaluation d'un tel risque. Une fois fixée la limite supérieure du risque tolérable, la procédure proposée permet de choisir les mesures de protection appropriées pour réduire le risque à une valeur inférieure ou égale à la valeur limite tolérable. Annex informative avec un logiciel simplifié pour l'évaluation du risque.

Zaščita pred delovanjem strele - 2. del: Vodenje rizika (vključuje program za oceno rizika) (IEC 62305-2:2006)

General Information

• Status: Withdrawn
• Publication Date: 22-Feb-2006
• Withdrawal Date: 31-Jan-2009
• ICS: 29.020 - Electrical engineering in general
• ICS: 91.120.40 - Lightning protection
• Technical Committee: CLC/TC 81X - Lightning protection
• Drafting Committee: IEC/TC 81 - IEC_TC_81
• Parallel Committee: IEC/TC 81 - IEC_TC_81
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 13-Jan-2014
• Completion Date: 13-Jan-2014
• Ref Project: SIST EN 62305-2:2006 - Protection against lightning -- Part 2: Risk management

Relations

• Replaced By: EN 62305-2:2012 - Protection against lightning - Part 2: Risk management
• Effective Date: 29-Jan-2023

Standards Content (Sample)

STANDARDZaščita pred delovanjem strele – 2. del: Vodenje tveganja (vključuje program za oceno tveganja)Protection against lightning - Part 2: Risk management©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 62305-2:2006(en)ICS91.120.40

EUROPEAN STANDARD EN 62305-2 NORME EUROPÉENNE
EUROPÄISCHE NORM February 2006
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62305-2:2006 E
ICS 29.020; 91.120.40
English version
Protection against lightning Part 2: Risk management (IEC 62305-2:2006)
Protection contre la foudre Partie 2: Evaluation du risque (CEI 62305-2:2006)
Blitzschutz Teil 2: Risiko-Management (IEC 62305-2:2006)
This European Standard was approved by CENELEC on 2006-02-01. 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, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Rumania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

EN 62305-2:23006
- 2 - Foreword The text of document 81/263/FDIS, future edition 1 of IEC 62305-2, prepared by IEC TC 81, Lightning protection, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62305-2 on 2006-02-01. 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)
2006-11-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2009-02-01 This European Standard makes reference to International Standards. Where the International Standard referred to has been endorsed as a European Standard or a home-grown European Standard exists, this European Standard shall be applied instead. Pertinent information can be found on the CENELEC web site. __________ Endorsement notice The text of the International Standard IEC 62305-2:2006 was approved by CENELEC as a European Standard without any modification. __________

IEC 62305-2Edition 1.0 2006-01INTERNATIONAL STANDARD NORME INTERNATIONALEProtection against lightning –
Part 2: Risk management
Protection contre la foudre –
Partie 2: Evaluation des risques
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XEICS 29.020;
91.120.40 PRICE CODECODE PRIXISBN 2-8318-8364-4

62305-2  IEC:2006 – 3 –
CONTENTS
FOREWORD.7 INTRODUCTION.9
1 Scope.11 2 Normative references .11 3 Terms, definitions, symbols and abbreviations.11 4 Explanation of terms.21 4.1 Damage and loss .21 4.2 Risk and risk components.23 4.3 Composition of risk components related to a structure.25 4.4 Composition of risk components related to a service .27 4.5 Factors influencing the risk components.28 5 Risk management.29 5.1 Basic procedure .29 5.2 Structure to be considered for risk assessment .29 5.3 Service to be considered for risk assessment.29 5.4 Tolerable risk RT .30 5.5 Specific procedure to evaluate the need of protection.30 5.6 Procedure to evaluate the cost effectiveness of protection .31 5.7 Protection measures .33 5.8 Selection of protection measures.33 6 Assessment of risk components for a structure.36 6.1 Basic equation.36 6.2 Assessment of risk components due to flashes to the structure (S1).36 6.3 Assessment of the risk component due to flashes near the structure (S2) .36 6.4 Assessment of risk components due to flashes to a line connected to the structure (S3) .37 6.5 Assessment of risk component due to flashes near a line connected to the structure (S4) .37 6.6 Summary of risk components in a structure .39 6.7 Partitioning of a structure in zones ZS .39 6.8 Assessment of risk components in a structure with zones ZS.40 7 Assessment of risk components for a service .41 7.1 Basic equation.41 7.2 Assessment of components due to flashes to the service (S3).41 7.3 Assessment of risk component due to flashes near the service (S4).41 7.4 Assessment of risk components due to flashes to structures to which the service is connected (S1) .42 7.5 Summary of risk components for a service .42 7.6 Partitioning of a service into sections SS .43
– 2 –62305-2 © IEC:2006
62305-2  IEC:2006 – 5 –
Annex A (informative)
Assessment of annual number N of dangerous events.44 Annex B
(informative)
Assessment of probability PX of damage for a structure.53 Annex C (informative)
Assessment of amount of loss LX in a structure.59 Annex D (informative)
Assessment of probability P′X of damage to a service .64 Annex E (informative)
Assessment of the amount of loss L′X in a service.68 Annex F (informative)
Switching overvoltages.70 Annex G (informative)
Evaluation of costs of loss .71 Annex H (informative)
Case study for structures .72 Annex I (informative)
Case study for services – Telecommunication line.99 Annex J (informative)
Simplified software for risk assessment for structures.105
Bibliography.110
Figure 1 – Procedure for deciding the need of protection .31 Figure 2 – Procedure for evaluating the cost-effectiveness of protection measures.32 Fiigure 3 – Procedure for selecting protection measures in structures.34 Figure 4 – Procedure for selecting protection measures in services .35 Figure 5 – Structures at line ends: at “b” end the structure to be protected
(structure b) and at “a” end an adjacent structure(structure a) .38 Figure A.1 – Collection area Ad of an isolated structure .45 Figure A.2 – Complex shape structure .46 Figure A.3 – Different methods to determine the collection area
for the structure of Figure A.2.47 Figure A.4 – Structure to be considered for evaluation of collection area Ad .48 Figure A.5 – Collection areas (Ad, Am, Ai, Al).52 Figure I.1 – Telecommunication line to be protected .99 Figure J.1 – Example for a country house (see Clause H.1 – no protection measures provided) .108 Figure J.2 – Example for a country house (see Clause H.1 – protection measures provided) .109
Table 1 – Sources of damage, types of damage and types of loss selected
according to the point of strike.22 Table 2 – Risk in a structure for each type of damage and of loss.23 Table 3 – Risk components to be considered for each type of loss in a structure .26 Table 4 – Risk components to be considered for each type of loss in a service.27 Table 5 – Factors influencing the risk components in a structure .28 Table 6 – Factors influencing the risk components in a service.29 Table 7 – Typical values of tolerable risk RT .30 Table 8 – Parameters relevant to the assessment of risk components for a structure.38 Table 9 – Risk components for a structure for different types of damage
caused by different sources.39 62305-2 © IEC:2006– 3 –

62305-2  IEC:2006 – 7 –
Table 10 – Parameters relevant to the assessment of risk components for a service.42 Table 11 – Risk components for a service for different types of damage
caused by different sources.43 Table A. 1 – Values of collection area depending on the evaluation method.46 Table A.2 – Location factor Cd .49 Table A.3 – Collection areas Al and Ai depending on the service characteristics.50 Table A.4 – Transformer factor Ct .51 Table A.5 – Environmental factor Ce .51 Table B.1 – Values of probability PA that a flash to a structure will cause shock
to living beings due to dangerous touch and step voltages.53 Table B.2 – Values of PB depending on the protection measures to reduce physical damage .54 Table B.3 – Value of the probability PSPD as a function of LPL
for which SPDs are designed.54 Table B.4 – Value of the probability PMS as a function of factor KMS .55 Table B.5 – Value of factor KS3 depending on internal wiring .56 Table B.6 – Values of the probability PLD depending on the resistance RS of the cable screen and the impulse withstand voltage Uw of the equipment .57 Table B.7 – Values of the probability PLI depending on the resistance RS of the cable screen and the impulse withstand voltage Uw of the equipment .58 Table C.1 – Typical mean values of Lt, Lf and Lo.60 Table C.2 – Values of reduction factors ra and ru as a function
of the type of surface of soil or floor .60 Table C.3 – Values of reduction factor rp as a function of provisions taken
to reduce the consequences of fire.61 Table C.4 – Values of reduction factor rf as a function of risk of fire of structure .
...

SLOVENSKI SIST EN 62305-2
STANDARD
junij 2006
Zaščita pred delovanjem strele – 2. del: Vodenje rizika
(IEC 62305-2:2006)
Protection against lightning – Part 2: Risk management
(IEC 62305-2:2006)
Protection contre la foudre – Partie 2: Evaluation du risque
(CEI 62305-2:2006)
Blitzschutz – Teil 2: Risiko-Management
(IEC 62305-2:2006)
Referenčna oznaka
ICS 91.120.40; 92.020 SIST EN 62305-2:2006 (sl)

Nadaljevanje na straneh II in od 1 do 109

© 2009-09. Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov ni dovoljeno.

SIST EN 62305-2 : 2006
NACIONALNI UVOD
Standard SIST EN 62305-2 (sl), Zaščita pred delovanjem strele – 2. del: Vodenje rizika (IEC 62305-
2:2006), 2006, ima status slovenskega standarda in je istoveten evropskemu standardu EN 62305-2
(en), Protection against lightning – Part 2: Risk management, 2006.
NACIONALNI PREDGOVOR
Evropski standard EN 62305-2:2006 je pripravil tehnični odbor Evropske organizacije za
standardizacijo v elektrotehniki CLC/TC 81X Zaščita pred delovanjem strele. Evropski standard je
istoveten mednarodnemu standardu IEC 62305-2:2006, ki ga je pripravil tehnični odbor Mednarodne
elektrotehniške komisije IEC/TC 81 Zaščita pred delovanjem strele.
Slovenski standard SIST EN 62305-2:2006 je prevod evropskega standarda EN 62305-2:2006. V
primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen izvirni evropski
standard v angleškem jeziku. Slovensko izdajo standarda je pripravil tehnični odbor SIST/TC STZ –
Zaščita pred delovanjem strele.
Odločitev za privzem tega standarda po metodi ponatisa je dne 24. oktobra 2006 sprejel tehnični
odbor SIST/TC STZ.
OSNOVA ZA IZDAJO STANDARDA
Privzem standarda EN 62305-2:2006.
ZVEZE S STANDARDI
S privzemom tega evropskega standarda veljajo za omenjeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
SIST EN 60079-10:2003 Električne naprave za eksplozivne plinske atmosfere – 10. del: Razdelitev
eksplozijsko ogroženih prostorov (IEC 60079-10:2002)
SIST EN 61241-10:2005 Električne naprave za uporabo v prisotnosti gorljivega prahu – 10. del:
Razdelitev prostorov, v katerih je lahko prisoten gorljiv prah (IEC 61241-
10:2004)
SIST EN 62305-1 Zaščita pred delovanjem strele – 1. del: Splošna načela
SIST EN 62305-3 Zaščita pred delovanjem strele – 3. del: Fizična škoda na zgradbah in
nevarnost za živa bitja
SIST EN 62305-4 Zaščita pred delovanjem strele – 4. del: Električni in elektronski sistemi v
zgradbah
OPOMBE
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.
– Povsod, kjer se v besedilu standarda uporablja izraz “evropski standard”, v SIST EN 62305-
2:2006 to pomeni “slovenski standard”.
– Ta nacionalni dokument je istoveten z EN 62305-2:2006 in je objavljen z dovoljenjem
CENELEC
Avenue Marnix 17
B-1050 Bruselj
Belgija
– This national document is identical with EN 62305-2:2006 and is published with the permission of
CENELEC
Avenue Marnix 17
B-1050 Bruxelles
Belgium
II
EVROPSKI STANDARD EN 62305-2
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM februar 2006
ICS 29.020; 91.120.40
Slovenska izdaja
Zaščita pred delovanjem strele – 2. del: Vodenje tveganja
(IEC 62305-2:2006)
Protection against lightning – Protection contre la foudre – Blitzschutz –
Part 2: Risk management Partie 2: Evaluation du risque Teil 2: Risiko-Management
(IEC 62305-2:2006) (CEI 62305-2:2006) (IEC 62305-2:2006)

Ta evropski standard je CENELEC sprejel 1. februarja 2006. Člani CENELEC morajo izpolnjevati
notranje predpise CEN/CENELEC, s katerimi je predpisano, da mora biti ta standard brez kakršnihkoli
sprememb sprejet kot nacionalni standard.

Najnovejši seznami teh nacionalnih standardov z njihovimi bibliografskimi podatki se na zahtevo lahko
dobijo pri Centralnem sekretariatu ali katerikoli članici CENELEC.

Ta evropski standard obstaja v treh izvirnih izdajah (angleški, francoski in nemški). Izdaje v drugih
jezikih, ki jih članice CENELEC na lastno odgovornost prevedejo in izdajo ter prijavijo pri Centralnem
sekretariatu CEN, veljajo kot uradne izdaje.

Člani CENELEC so nacionalni organi za standarde Avstrije, Belgije, Cipra, Češke republike, Danske,
Estonije, Finske, Francije, Grčije, Irske, Islandije, Italije, Latvije, Litve, Luksemburga, Malte,
Madžarske, Nemčije, Nizozemske, Norveške, Poljske, Portugalske, Romunije, Slovaške, Slovenije,
Španije, Švedske, Švice in Združenega kraljestva.

CENELEC
Evropski komite za standardizacijo
European Committee for Standardization
Comité Européen de Normalisation
Europäisches Komitee für Normung

Centralni sekretariat: Rue de Stassart 36, B-1050 Bruselj

© 2006 CENELEC. Lastnice avtorskih pravic so vse države članice CENELEC. Ref. oznaka EN 62305-2:2006 E

SIST EN 62305-2 : 2006
Predgovor
Besedilo dokumenta 81/263/FDIS, prihodnje 1. izdaje standarda IEC 62305-2, ki ga je pripravil
tehnični odbor IEC/TC 81, Strelovodna zaščita, je CENELEC 1. februarja 2006 po vzporednem
glasovanju v IEC in CENELEC sprejel kot EN 62305-2.

Določena sta bila naslednja datuma:
– zadnji datum, do katerega mora EN dobiti status
nacionalnega standarda bodisi z objavo istovetnega besedila
ali z razglasitvijo (dop) 2006-11-01
– zadnji datum, ko je treba razveljaviti nacionalne standarde,
ki so z EN v nasprotju (dow) 2009-02-01

Ta evropski standard se sklicuje na mednarodne standarde. Kadar je bil mednarodni standard, na
katerega se sklicuje, sprejet kot evropski standard ali kadar obstaja samostojen evropski standard, se
namesto referenčnega uporablja evropski standard. Ustrezne informacije so na voljo na spletni strani
CENELEC.
Razglasitvena objava
Besedilo mednarodnega standarda IEC 62305-2:2006 je CENELEC odobril kot evropski standard brez
sprememb.
SIST EN 62305-2 : 2006
VSEBINA Stran
Predgovor .8
Uvod .10
1 Področje uporabe .12
2 Zveza s standardi .12
3 Izrazi, definicije, simboli in okrajšave .13
4 Razlaga izrazov.22
4.1 Škoda in izguba.22
4.2 Riziko in komponente rizika.24
4.3 Sestavljanje komponent rizika v zvezi z zgradbo.26
4.4 Sestavljanje komponent rizika v zvezi z oskrbovalnim vodom.28
4.5 Dejavniki, ki vplivajo na komponente rizika.29
5 Vodenje tveganja.30
5.1 Osnovni postopek.30
5.2. Zgradba, izbrana za ocenitev rizika.30
5.3 Oskrbovalni vod, izbran za ocenitev rizika .30
5.4 Tolerančni riziko, R .31
T
5.5 Specifičen postopek ovrednotenja potrebnosti zaščite .31
5.6 Postopek ovrednotenja stroškovne učinkovitosti zaščite .32
5.7 Zaščitni ukrepi .34
5.8 Izbira zaščitnih ukrepov.34
6 Ocenitev komponent rizika za stavbo.37
6.1 Osnovna enačba .37
6.2 Ocenitev komponent rizika zaradi udarov strele v zgradbo (S1) .37
6.3 Ocenitev komponente rizika zaradi udarov strele v bližino zgradbe (S2) .37
6.4 Ocenitev komponent rizika zaradi udarov strele v vod, povezan z zgradbo (S3) .37
6.5 Ocenitev komponente rizika zaradi udarov strele v bližino voda, povezanega z zgradbo (S4).38
6.6 Povzetek komponent rizika za zgradbo.39
6.7 Razdelitev zgradbe na zaščitne cone Z .40
S
6.8 Ocenitev komponent rizika v zgradbi z zaščitnimi conami Z .40
S
7 Ocenitev komponent rizika za oskrbovalni vod .42
7.1 Osnovna enačba .42
7.2 Ocenitev komponent rizika zaradi udarov strele v oskrbovalni vod (S3) .42
7.3 Ocenitev komponente rizika zaradi udarov strele v bližino oskrbovalnega voda (S4).42
7.4 Ocenitev komponent rizika zaradi udarov strele v zgradbo, s katero je povezan
oskrbovalni vod (S1) .42
7.5 Povzetek komponent rizika za oskrbovalni vod .43
7.6 Razdelitev oskrbovalnega voda na odseke S .44
S
Dodatek A (informativni): Ocenitev letnega števila nevarnih dogodkov N .45
Dodatek B (informativni): Ocenitev verjetnosti škode P za zgradbo .54
x
SIST EN 62305-2 : 2006
Dodatek C (informativni): Ocenitev vrednosti izgub L v zgradbi.60
X
Dodatek D (informativni): Ocenitev verjetnosti P ' škode na oskrbovalnem vodu .65
X
Dodatek E (informativni): Ocenitev vrednosti izgube L' na oskrbovalnem vodu .69
X
Dodatek F (informativni): Stikalne prenapetosti .71
Dodatek G (informativni): Določitev vrednosti stroškov izgube.72
Dodatek H (informativni): Primer izračuna za zgradbo .73
Dodatek I (informativni): Primeri izračunov za oskrbovalne vode – telekomunikacijski vod .98
Dodatek J (informativni): Poenostavljen programski paket za ocenitev rizika za zgradbe . 104
Bibliografija . 109

Slika 1: Postopek odločanja o potrebnosti zaščite .32
Slika 2: Postopek ovrednotenja stroškovne učinkovitosti zaščitnih ukrepov.33
Slika 3: Postopek izbire zaščitnih ukrepov za zgradbe .35
Slika 4: Postopek izbire zaščitnih ukrepov za napeljavo.36
Slika 5: Zgradbi na koncih voda: na koncu “b” je ščitena zgradba (zgradba b) in na koncu “a” je
sosednja zgradba (zgradba a) .39
Slika A.1: Zbirna površina A za osamljeno zgradbo.46
d
Slika A.2: Zgradba zapletene oblike.47
Slika A.3: Različne metode določanja zbirne površine za zgradbo na sliki A.2.48
Slika A.4: Zgradba, ki se upošteva za ovrednotenje zbirne površine A .49
d
Slika A.5: Zbirne površine (A , A , A , A ).53
d m i l
Slika I.1: Ščiteni telekomunikacijski vod.98
Slika J.1: Primer za podeželsko hišo (glej točko H.1 – niso izvedeni nobeni zaščitni ukrepi) . 107
Slika J.2: Primer za podeželsko hišo (glej točko H.1 – izvedeni so zaščitni ukrepi) . 108

Preglednica 1: Viri škode, vrste škode in vrste izgube glede na mesto udara strele.23
Preglednica 2: Tveganje v zgradbi za vsako vrsto škode in izgube.24
Preglednica 3: Komponente rizika za zgradbo, ki jih je treba upoštevati v vsaki vrsti izgube .
...