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IEC 62305-2:2010

Current
Current

The latest, up-to-date edition.

Protection against lightning - Part 2: Risk management
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English, English - French, Spanish, Castilian

Published date

09-12-2010

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
4 Explanation of terms
5 Risk management
6 Assessment of risk components
Annex A (informative) - Assessment of annual number N of
        dangerous events
Annex B (informative) - Assessment of probability P[X] of
        damage
Annex C (informative) - Assessment of amount of loss L[X]
Annex D (informative) - Evaluation of costs of loss
Annex E (informative) - Case study
Bibliography

IEC 62305-2:2010 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.
This bilingual version corresponds to the monolingual English version, published in 2010-12.

Committee
TC 81
DevelopmentNote
Supersedes IEC 61662 (01/2006) A Bilingual edition has been published. (11/2011) Stability Date: 2018. (10/2012)
DocumentType
Standard
Pages
84
PublisherName
International Electrotechnical Committee
Status
Current
Supersedes

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S.R. CLC/TS 50539-12:2013 LOW-VOLTAGE SURGE PROTECTIVE DEVICES - SURGE PROTECTIVE DEVICES FOR SPECIFIC APPLICATION INCLUDING D.C. - PART 12: SELECTION AND APPLICATION PRINCIPLES - SPDS CONNECTED TO PHOTOVOLTAIC INSTALLATIONS
PD IEC/TR 60479-4:2011 Effects of current on human beings and livestock Effects of lightning strokes
BS IEC 62793 : 2016 PROTECTION AGAINST LIGHTNING - THUNDERSTORM WARNING SYSTEMS
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CEI CLC/TS 50539-22 : 2012 LOW-VOLTAGE SURGE PROTECTIVE DEVICES - SURGE PROTECTIVE DEVICES FOR SPECIFIC APPLICATION INCLUDING D.C. - PART 22: SELECTION AND APPLICATION PRINCIPLES - WIND TURBINE APPLICATIONS
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I.S. EN 62305-1:2011 PROTECTION AGAINST LIGHTNING - PART 1: GENERAL PRINCIPLES
S.R. HD 60364-4-443:2016 LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 4-44: PROTECTION FOR SAFETY - PROTECTION AGAINST VOLTAGE DISTURBANCES AND ELECTROMAGNETIC DISTURBANCES - CLAUSE 443: PROTECTION AGAINST TRANSIENT OVERVOLTAGES OF ATMOSPHERIC ORIGIN OR DUE TO SWITCHING
I.S. EN 16893:2018 CONSERVATION OF CULTURAL HERITAGE - SPECIFICATIONS FOR LOCATION, CONSTRUCTION AND MODIFICATION OF BUILDINGS OR ROOMS INTENDED FOR THE STORAGE OR USE OF HERITAGE COLLECTIONS
PREN 1127-2 : DRAFT 2012 EXPLOSIVE ATMOSPHERES - EXPLOSION PREVENTION AND PROTECTION - PART 2: BASIC CONCEPTS AND METHODOLOGY FOR MINING
IEC 60364-7-712 REDLINE : 2ED 2017 LOW VOLTAGE ELECTRICAL INSTALLATIONS - PART 7-712: REQUIREMENTS FOR SPECIAL INSTALLATIONS OR LOCATIONS - SOLAR PHOTOVOLTAIC (PV) POWER SUPPLY SYSTEMS
BS EN 1127-1:2011 Explosive atmospheres. Explosion prevention and protection Basic concepts and methodology
IEC TS 62257-5:2015 Recommendations for renewable energy and hybrid systems for rural electrification - Part 5: Protection against electrical hazards
IEC 62305-1:2010 Protection against lightning - Part 1: General principles
I.S. CLC TS 61643-12:2006 LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 12: SURGE PROTECTIVE DEVICES CONNECTED TO LOW-VOLTAGE POWER SYSTEMS - SELECTION AND APPLICATION PRINCIPLES
BS EN 50174-2 : 2009 INFORMATION TECHNOLOGY - CABLING INSTALLATION - PART 2: INSTALLATION PLANNING AND PRACTICES INSIDE BUILDINGS
IEC 61400-24:2010 Wind turbines - Part 24: Lightning protection
12/30251569 DC BS IEC 62128-1. Railway applications. Fixed installations. Electrical safety, earthing and the return circuit. Part 1. Protective provisions against electric shock
PD IEC/TS 62257-5:2015 Recommendations for renewable energy and hybrid systems for rural electrification Protection against electrical hazards
UNE-CLC/TS 61643-12:2012 Low-voltage surge protective devices -- Part 12: Surge protective devices connected to low-voltage power distribution systems - Selection and application principles
HD 60364-4-443:2016 Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances - Clause 443: Protection against transient overvoltages of atmospheric origin or due to switching
EN 62305-4:2011/AC:2016-11 Protection against lightning - Part 4: Electrical and electronic systems within structures
HD 60364-7-712:2016 Low-voltage electrical installations - Part 7-712: Requirements for special installations or locations - Photovoltaic (PV) systems
IEC 60364-7-712:2017 RLV Low voltage electrical installations - Part 7-712: Requirements for special installations or locations - Solar photovoltaic (PV) power supply systems
EN 1127-1:2011 Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology
EN 61000-1-2:2016 Electromagnetic compatibility (EMC) - Part 1-2: General - Methodology for the achievement of functional safety of electrical and electronic systems including equipment with regard to electromagnetic phenomena
EN 61400-24:2010 Wind turbines - Part 24: Lightning protection
CLC/TS 61643-12 : 2009 LOW-VOLTAGE SURGE PROTECTIVE DEVICES - PART 12: SURGE PROTECTIVE DEVICES CONNECTED TO LOW-VOLTAGE POWER DISTRIBUTION SYSTEMS - SELECTION AND APPLICATION PRINCIPLES
EN 62858:2015 Lightning density based on lightning location systems (LLS) - General principles
EN 62305-3:2011 Protection against lightning - Part 3: Physical damage to structures and life hazard

IEC 60079-10-1:2015 Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres
IEC 60050-426:2008 International Electrotechnical Vocabulary (IEV) - Part 426: Equipment for explosive atmospheres
IEC 62305-1:2010 Protection against lightning - Part 1: General principles
IEC TR 62066:2002 Surge overvoltages and surge protection in low-voltage a.c. power systems - General basic information
IEC 62305-4:2010 Protection against lightning - Part 4: Electrical and electronic systems within structures
IEC 60664-1:2007 Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
IEC 62305-3:2010 Protection against lightning - Part 3: Physical damage to structures and life hazard

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