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IEC 62505-2
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IEC 62505-2 2nd Edition, February 1, 2016 Railway applications – Fixed installations – Particular requirements for AC switchgear – Part 2: Disconnectors, earthing switches and switches with nominal voltage above 1 kV
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Description / Abstracts:
This part of IEC 62505 is applicable to single-pole, two-pole and three-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 IEC 60850.
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.
• 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.
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.