SN EN 50123-4 : 2003 AMD 1 2013

1 Scope
2 Normative references
3 Definitions
4 Service requirements
5 Characteristics of the unit
  5.1 Enumeration of the characteristics
  5.2 Type of unit
  5.3 Rated values
  5.4 Class of use
  5.5 Control circuits
  5.6 Auxiliary contacts and circuits
6 Construction
  6.1 General
  6.2 Materials
  6.3 Arcing contacts
  6.4 Clearances and creepage distances
  6.5 Primary connections
  6.6 Location of the primary connections
  6.7 Earthing terminal
  6.8 Manual operation means
  6.9 Unit enclosure
  6.10 Temperature-rises
  6.11 Dielectric strength
  6.12 Electrical and mechanical endurance
  6.13 Operation
  6.14 Corrosion protection
  6.15 Noise emission
  6.16 Cooling
  6.17 Servo-control (where applicable)
  6.18 Other facilities
7 Information and marking
  7.1 Information
  7.2 Marking
8 Tests
  8.1 General
  8.2 Applicable tests and test sequence
  8.3 Performance of tests
Annex A (informative) Information required
  A.1 General
  A.2 Procurement specification
  A.3 Manufacturer's specification
Tables

Defines requirements for outdoor d.c. switch-disconnectors, disconnectors and earthing switches for use in outdoor fixed installations of traction systems.