NEN EN 50123-3 : 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 Unit enclosures
  6.3 Temperature-rises
  6.4 Dielectric strength
  6.5 Electrical and mechanical endurance
  6.6 Operation
  6.7 Corrosion protection
  6.8 Noise emission
  6.9 Cooling
  6.10 Servo-control (where applicable)
  6.11 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

Specifies requirements for d.c. disconnectors, switch-disconnectors and earthing switches for use in indoor stationary installations of traction systems.