DANSK DSF/IEC 62505-3-1 ED2 PDF

This International Standard is applicable to new low voltage devices for measurement, control and protection which are: – for indoor or outdoor fixed installations in traction systems, and – operated in conjunction with high voltage equipment with an AC line voltage and frequency as specified in IEC 60850. NOTE – IEC 60850 specifies the AC traction systems: 15 kV 16,7 Hz, 12 kV 25 Hz, 12,5 kV, 20 kV also 25 kV with 50 Hz and 12,5 kV, 20 kV, 25 kV also 50 kV with 60 Hz. The standard does not provide specific requirements for AC traction systems supplied with a frequency of 25 Hz or with a nominal voltage of 12,5 kV or 50 kV. Nevertheless requirements set out in this standard may be used as a guidance also for these systems. This International Standard also applies to measurement, control and protective devices other than low voltage devices and not covered by a specific railway product standard as far as reasonably possible. Requirements of this document prevail.