DD CLC/TS 61643-12:2009

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

Explains 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.

This Technical Specification describes 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 1 000 V r.m.s..

NOTE 1 This Technical Specification deals only with SPDs and not with SPDs components integrated inside equipment.

NOTE 2 Additional requirements may be necessary for special applications such as electrical traction, etc.

NOTE 3 It should be remembered that IEC 60364 series and EN 62305-4 are also applicable.