CEI CLC/TS 61643-12 : 2010

0 Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
4 Systems and equipment to be protected
5 Surge protective devices
6 Application of SPDs in low-voltage power distribution
  systems
7 Risk analysis
8 Co-ordination where equipment has both signalling and
  power terminals
Annex A (informative) - Examples of various SPD
        technologies
Annex B (informative) - Explanation of testing procedures
        used in EN 61643-11
Annex C (informative) - Partial lightning current calculations
Annex D (informative) - Examples of application of
        CLC/TS 61643-12
Annex E (informative) - Examples of application of the risk
        analysis
Annex F (informative) - Consideration for SPDs when Type 1
        SPDs are to be applied
Annex G (informative) - Immunity versus insulation withstand
Annex H (informative) - Examples of SPD installation in
        power distribution boards in some countries
Annex I (informative) - Short circuit backup protection and
        surge withstand
Annex J (informative) - SPD coordination test principles
Annex K (informative) - Simple calculation of I[imp] for a
        Type 1 SPD in case of a building protected by a LPS
Bibliography

Specifies the principles for selection, operation, location and co-ordination of SPDs to be connected to 50 Hz to 60 Hz a.c. power circuits and equipment rated up to 1000 V r.m.s.