EN 50152-3-3:2016

European foreword
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Service conditions
5 Rating
6 Design and construction
7 Tests
8 Rules for transport, storage, erection, operation
   and maintenance
9 Safety
10 Influence of the product on the environment
11 Information to be given with enquiries, tenders
   and orders
Bibliography

This EN 50152 3 3 is applicable to new voltage transformers which are:-intended for use in indoor or outdoor fixed installations in tractions systems, and-operated with an a.c. line voltage and frequency as specified in EN 50163.NOTE 1EN 50163 specifies the a.c. traction systems 15 kV 16,7 Hz and 25 kV 50 Hz.NOTE 2As rails of a.c. traction systems are typically connected to earth and included in the return current path, all phase to earth voltages are subject to the limits as given in EN 50163. Nevertheless conductor to conductor voltages are some times higher e.g. in autotransformer systems.Voltage transformers are mainly used with:-measuring instruments,-protective devices.This EN 50152 3 3 also applies to voltage transformers other than inductive types as far as reasonably possible. Requirements of this EN 50152 3 3 have priority.NOTE 3Combined current and voltage transformers also capacitive voltage transformers are typically not used in fixed installations in traction systems.