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IEC 62505-1

Railway applications – Fixed installations – Particular requirements for AC switchgear – Part 1: Circuit-breakers with nominal voltage above 1 kV

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Organization: IEC
Publication Date: 1 February 2016
Status: active
Page Count: 58
ICS Code (Railway rolling stock): 45.060
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.

Document History

IEC 62505-1
February 1, 2016
Railway applications – Fixed installations – Particular requirements for AC switchgear – Part 1: Circuit-breakers with nominal voltage above 1 kV
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...
March 1, 2009
Railway applications – Fixed installations – Particular requirements for a.c. switchgear – Part 1: Single-phase circuit-breakers with Un above 1 kV
This part of IEC 62505 is applicable to single-phase a.c. one-pole circuit-breakers designed for indoor or outdoor fixed installations for operation at frequencies of 16,7 Hz, 50 Hz and 60 Hz on...

References

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