BS EN 50123-5:2003

Introduction
1 Common matters
  1.1 Scope
  1.2 Normative references
2 Non-linear resistor type gapped surge arresters
  2.1 General
  2.2 Definitions
  2.3 Marking
  2.4 Preferred ratings
  2.5 Requirements
  2.6 General testing procedure
  2.7 Routine and acceptance tests
  2.8 Type tests
3 Artificial pollution testing of surge arresters
4 Metal-oxide surge arresters without gaps
  4.1 General
  4.2 Definitions
  4.3 Marking
  4.4 Preferred ratings
  4.5 Requirements
  4.6 General testing procedure
  4.7 Type tests
  4.8 Routine and acceptance tests
5 Low-voltage limiters for specific use in d.c. systems
  5.1 General
  5.2 Definitions
  5.3 Marking and classification
  5.4 Preferred ratings
  5.5 Requirements
  5.6 Routine and acceptance tests
  5.7 Type tests
Annex A (informative) Typical information given with
        enquiries and tenders valid for all types
        covered in this European Standard
Annex B (informative) High voltage filters for protection
        against voltage surges
Figures
Tables

Specifies particular requirements for surge arresters for specific use in fixed installations of d.c. traction systems.