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Project

Reference	EN 62305-2:2012
Title	Protection against lightning - Part 2: Risk management
Project Number	22661
Abstract/Scope	IEC 62305-2:2010(E) is applicable to risk assessment for a structure 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. This second edition cancels and replaces the first edition, published in 2006, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: 1) Risk assessment for services connected to structures is excluded from the scope. 2) Injuries of living beings caused by electric shock inside the structure are considered. 3) Tolerable risk of loss of cultural heritage is lowered from 10-3 to 10-4. The value of tolerable risk of loss of economic value (RT = 10-3) is introduced, to be used when data for cost/benefit analysis are not available. 4) Extended damage to surroundings structures or to the environment is considered. 5) Improved equations are provided for evaluation of: - collection areas relevant to flashes nearby a structure, - collection areas relevant to flashes to and nearby a line, - probabilities that a flash can cause damage, - loss factors even in structures with risk of explosion, - risk relevant to a zone of a structure, - cost of loss. 6) Tables are provided to select the relative amount of loss in all cases. 7) Impulse withstand voltage level of equipments was extended down to 1 kV.
Status	Published

Status

Current Stage code	6060
Current Stage code date	2012-05-18
Current Stage code deadline	2013-03-19
Deadline date for vote	2012-07-05

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Directive(s)
Mandate(s)
Order Voucher

Details

IEC Technical Body	IEC/TC 81
Reference Document	IEC 62305-2:2010 (MOD)
ICS	29.020 - Electrical engineering in general 91.120.40 - Lightning protection
Keywords	Lightning; Protection; Risk management
Note	2012-02-14 - Publication editing allocated to cpalagi@cencenelec.eu * Supersedes EN 62305-2:2006 + corr. Nov.2006
A-Deviation(s)
Special National Condition(s)

Environment

Clause	Categories - Aspects	Product Life Cycle	Information

History

Stage	Date	Deadline Date	Documents
6060	2012-05-18	2013-03-19	EN FR DE
5099	2012-03-19	2012-04-16
5060	2012-02-13	2012-03-05	EN
5020	2011-09-09	2012-02-10	EN DE
3090	2011-07-05	2011-07-22
5091	2011-02-17
5060	2010-11-08	2010-12-20	EN
5020	2010-09-03	2010-11-05
3090	2010-04-02	2010-06-10
5060	2010-02-22	2010-03-08	EN
5020	2009-09-18	2010-02-19
1090	2009-09-15	2009-09-18

Implementation Dates

date of Ratification (DOR) (1)	2012-03-19
date of Availability (DAV) (2)	2012-05-18
date of Announcement (DOA) (3)	2012-09-19
date of Publication (DOP) (4)	2013-03-19
date of Withdrawal (DOW) (5)	2014-01-13

Relations

Supersedes	EN 62305-2:2006 EN 62305-2:2006/corrigendum Nov. 2006
Superseded by
Normative reference (6)

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.