UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

NEN-IEC 62505-3-3

Railway applications - Fixed installations - Particular requirements for AC switchgear - Part 3-3: Measurement, control and protection devices for specific use in AC traction systems - Voltage transformers

active, Most Current
Organization: NEN
Publication Date: 1 February 2020
Status: active
Page Count: 24
ICS Code (Railway rolling stock in general): 45.060.01
scope:

This part of IEC 62505 is applicable to new voltage transformers which are:

- intended for use in indoor or outdoor fixed installations in tractions systems, and

- operated with an AC line voltage and frequency as specified in IEC 60850.

NOTE 1 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.

NOTE 2 As rails of AC 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 IEC 60850. Nevertheless, conductor to conductor voltages are sometimes higher, e.g. in autotransformer systems.

This document 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 document can be used as a guidance also for these systems.

Voltage transformers are mainly used with:

- measuring instruments,

- protective devices.

This document also applies to voltage transformers other than inductive types as far as reasonably possible. Requirements of this document have priority.

NOTE 3 Combined current and voltage transformers, also capacitive voltage transformers are typically not used in fixed installations in traction systems.

Document History

NEN-IEC 62505-3-3
February 1, 2020
Railway applications - Fixed installations - Particular requirements for AC switchgear - Part 3-3: Measurement, control and protection devices for specific use in AC traction systems - Voltage transformers
This part of IEC 62505 is applicable to new voltage transformers which are: – intended for use in indoor or outdoor fixed installations in tractions systems, and – operated with an AC line voltage...

References

Advertisement