IEC 62505-1:2016 PDF

Scope: This part of IEC 62505 is applicable to single-pole and two-pole alternating current (a.c.) circuit-breakers 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 IEC 60850:2014. NOTE 1 IEC 60850 specifies the a.c. 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. NOTE 2 As rails of a.c. traction systems are typically connected to earth and included in the return current path all phase to earth voltages will be within the tolerances as specified in IEC 60850. Nevertheless phase to phase voltages are sometimes higher, e. g. in autotransformer systems. This Standard is also applicable to the operating devices of circuit-breakers and to their auxiliary equipment. This Standard does not address circuit-breakers with dependent manual operating mechanism. NOTE 3 It is impossible to specify a short-circuit making current for these circuit-breakers and it is likely that such dependent manual operation is not meeting safety considerations.

IEC 62505-1:2016 Referenced Document

IEC 60850:2014 Railway applications - Supply voltages of traction systems
IEC 62236-5:2008 Railway applications - Electromagnetic compatibility - Part 5: Emission and immunity of fixed power supply installations and apparatus
IEC 62271-100:2008 High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breakers
IEC 62271-1:2007 High-voltage switchgear and controlgear - Part 1: Common specifications
IEC 62497-1:2010 Railway applications - Insulation coordination - Part 1: Basic requirements - Clearances and creepage distances for all electrical and electronic equipment
IEC 62498-2:2010 Railway applications - Environmental conditions for equipment - Part 2: Fixed electrical installations
IEC 62505-2:2016 Railway applications - Fixed installations - Particular requirements for AC switchgear - Part 2: Disconnectors, earthing switches and switches with nominal voltage above 1 kV

2016 IEC 62505-1:2016 Railway applications - Fixed installations - Particular requirements for AC switchgear - Part 1: Circuit-breakers with nominal voltage above 1 kV
2009 IEC 62505-1:2009 Railway applications - Fixed installations - Particular requirements for a.c. switchgear - Part 1: Single-phase circuit-breakers with U<(Index)n> above 1 kV