FOREWORD
INTRODUCTION
1 General
  1.1 Scope
  1.2 Normative references
2 Service conditions
  2.1 Normal
  2.2 Abnormal
3 Definitions
4 Classifications
  4.1 Number of ports
  4.2 SPD design topology
  4.3 SPD class I, II and III tests
  4.4 Location
  4.5 Accessibility
  4.6 Mounting method
  4.7 SPD disconnector
  4.8 Overcurrent protection
  4.9 Degree of protection provided by enclosures according
       to IP codes of IEC 60529
  4.10 Temperature range
  4.11 System
  4.12 Multipole SPD
5 Standard ratings
  5.1 Preferred values of impulse current for class I
       tests I[imp]
  5.2 Preferred values of nominal discharge current for
       class II tests I[n]
  5.3 Preferred values of open-circuit voltage for class
       III tests U[oc]
  5.4 Preferred values of voltage protection level U[p]
  5.5 Preferred values of r.m.s. or d.c. maximum continuous
       operating voltage U[c]
6 Requirements
  6.1 General requirements
  6.2 Electrical requirements
  6.3 Mechanical requirements
  6.4 Environmental requirements
  6.5 Safety requirements
  6.6 Additional test requirements for two-port SPDs and
       one-port SPDs with separate input/output terminals
7 Type tests
  7.1 General testing procedures
  7.2 Identification and marking
  7.3 Terminals and connections
  7.4 Testing for protection against direct contact
  7.5 Determination of the measured limiting voltage
  7.6 Operating duty test
  7.7 SPD disconnectors and safety performance of
       overstressed SPDs
  7.8 Test for two-port SPDs and one-port SPDs with separate
       input/output terminals
  7.9 Additional tests
8 Routine and acceptance tests
  8.1 Routine tests
  8.2 Acceptance tests
Annex A (informative) Considerations for SPDs when class I
                      tests are to be applied
Annex B (normative) TOV values
Bibliography