IEC 62305-2:2018 PRV 
Pre release version

Protection against lightning - Part 2: Risk management

English/French
CHF 

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Abstract

This Final Draft International Standard is an up to 6 weeks' pre-release of the official publication. It is available for sale during its voting period: 2018-10-26 to 2018-12-07. By purchasing this FDIS now, you will automatically receive, in addition, the final publication.

IEC 62305-2:2018 is applicable to the management of risk, 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 for the selection of appropriate protection measures to reduce the risk to or below the tolerable limit. Risk management also includes the evaluation of frequency of damage of internal systems caused by surges due to lightning flashes to earth. Once an upper tolerable limit for the frequency of damage has been selected, this procedure allows for the selection of appropriate protection measures to reduce the frequency of damage to or below the tolerable limit. 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:
- the concept of types of loss with social relevance has been introduced;
- the concept of frequency of damage that may impair the availability of the internal systems within the structure has been introduced;
- provisions activated by means of a thunderstorm warning system (TWS) which can reduce the risk and the frequency of damage have been introduced;
- the lightning ground strike-point density NSG has been introduced replacing the lightning flash density NSG in the evaluation of the expected average annual number of dangerous events.

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Relevant for

rural electrification


Additional information

Publication typeInternational Standard
Publication date2018-10-26
Edition3.0
Available language(s)English/French
TC/SCTC 81 - Lightning protectionrss
ICS29.020 - Electrical engineering in general
91.120.40 - Lightning protection
Stability date  2026
Pages198
File size1935 KB

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