IEC 62305-1:2010

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Lightning current parameters
5 Damage due to lightning
6 Need and economic justification for lightning
  protection
7 Protection measures
8 Basic criteria for protection of structures
Annex A (informative) - Parameters of lightning
        current
Annex B (informative) - Time functions of the
        lightning current for analysis purposes
Annex C (informative) - Simulation of the lightning
        current for test purposes
Annex D (informative) - Test parameters simulating
        the effects of lightning on LPS Components
Annex E (informative) - Surges due to lightning at
        different installation points
Bibliography

IEC 62305-1:2010 provides general principles to be followed for protection of structures against lightning, including their installations and contents, as well as persons. 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) It no longer covers protection of services connected to structures.
2) Isolated interfaces are introduced as protection measures to reduce failure of electric and electronic systems.
3) First negative impulse current is introduced as a new lightning parameter for calculation purposes.
4) Expected surge overcurrents due to lightning flashes have been more accurately specified for low voltage power systems and for telecommunication systems.
This bilingual version (2013-01) corresponds to the monolingual English version, published in 2010-12.