IEC 62305-1 Ed. 3.0 b:2024

Current Revision
Protection against lightning - Part 1: General principles

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Protection against lightning - Part 1: General principles

Protection against lightning - Part 1: General principles

IEC 62305-1:2024 provides general principles for the protection of structures against lightning, including their installations and contents, as well as persons.

The following cases are outside the scope of this document:

  • railway systems;
  • vehicles, ships, aircraft, offshore installations;
  • underground high-pressure pipelines;
  • pipe, power and telecommunication lines separated from the structure;
  • nuclear power plants.

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:

  • a) reference to the IEC 62561 series is made in Annex D to provide a link to relevant lightning protection system components according to the IEC 62561 series;
  • b) risk management introduces the concept of types of loss with public relevance;
  • c) the concept of frequency of damage that can impair the availability of the internal systems within the structure has been introduced;
  • d) surge currents due to lightning flashes have been more accurately specified for SPD dimensioning in low-voltage power systems and in telecommunication systems.
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