BS EN 50152-2:2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Normal and special service conditions
5 Rating
6 Design and construction
7 Type tests
8 Routine tests
9 Guide to the selection of switching devices
   for service
10 Information to be given with inquiries,
   tenders and orders
11 Rules for transport, storage, erection,
   operation and maintenance
12 Safety
13 Influence of the product on the environment
Bibliography

Pertains to single-pole and two-pole alternating current (a.c.) disconnectors, earthing switches and switches which are: - designed for indoor or outdoor fixed installations in tractions systems, and - operated with an a.c. line voltage and frequency as specified in EN 50163.

This European Standard is applicable to single-pole and two-pole alternating current (a.c.) disconnectors, earthing switches and switches which are:

• designed for indoor or outdoor fixed installations in tractions systems, and

• operated with an a.c. line voltage and frequency as specified in EN50163.

  NOTE1 EN50163 specifies the a.c. traction systems 15kV 16,7Hz and 25kV 50Hz.

  NOTE2 As rails of a.c. traction systems are connected to earth and included in the return current path all phase to earth voltages will be within the tolerances as specified in EN50163. Nevertheless phase to phase voltages are sometimes higher, e.g. in autotransformer systems.

  NOTE3 The two poles of a switch can be connected in series to provide secure isolation (i.e. two breaks in series).