MT 62505 - TC 9/MT 62505

IEC 62505-3-2:2020 is applicable to new current transformers which are:
- intended for use in indoor or outdoor fixed installations in traction systems, and
- operated with an AC line voltage and frequency as specified in IEC 60850.
This second edition cancels and replaces the first edition published in 2009.This edition includes the following significant technical changes with respect to the previous edition :
- this standard was revised to reflect the latest versions of standards referenced and to remove text already included in the IEC 61869 series.
- the structure of the document was adapted to that of IEC 62505‑1 and IEC 62505‑2.
- ratings have been added to provide designations in line with other railway standards, for example IEC 62497.
- test requirements have been detailed to meet operating conditions of railway applications.
- partial discharge voltages have been specified.

IEC 62505-3-1:2020 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.
This document 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.
This second edition cancels and replaces the first edition published in 2009.  This edition includes the following significant technical changes with respect to the previous edition:
- distinguish between requirements and application guides
- include requirements on devices for example control and protection relays not included before;
- remove parts already included in other standards, for example EN 50633 for protection principles, which is intended to become an IEC standard.

IEC 62505-3-3:2020 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.
This document also applies to voltage transformers other than inductive types as far as reasonably possible. Requirements of this document have priority.
This second edition cancels and replaces the first edition published in 2009. This edition includes the following significant technical changes with respect to the previous edition:
This standard was revised to reflect the latest versions of standards referenced and to remove text already included in the IEC 61869 series.
The structure of the document was adapted to that of IEC 62505‑1 and IEC 62505‑2.
Ratings have been added to provide designations in line with other railway standards, for example IEC 62497.
Tests requirements have been detailed to meet operating conditions of railway applications.
Partial discharge voltages have been specified

IEC 62505-2:2016 is applicable to single-pole, two-pole and three-pole alternating current (AC) disconnectors, earthing switches and switches which are designed for indoor or outdoor fixed installations in tractions systems, and operated with an AC line voltage and frequency as specified in IEC 60850. The main changes with respect to the previous edition are as follows:
- reflect the latest versions of standards referenced and remove text already included in the IEC 62271 series;
- rework Table 1 according to the changes of IEC 62497-1:2010.
This publication is to be read in conjunction with IEC 62271-1:2007, IEC 62271-102:2001, and IEC 62271-103:2011.

IEC 62505-1:2016 is applicable to single-pole and two-pole alternating current (AC) circuit-breakers which are designed for indoor or outdoor fixed installations in tractions systems, and operated with an AC line voltage and frequency as specified in IEC 60850:2014. The main changes with respect to the previous edition are as follows:
- reflect the latest versions of standards referenced and remove text already included in the IEC 62271 series;
- extend the scope to include single-pole and two-pole circuit-breakers;
- rework Table 1 according to the changes of IEC 62497-1:2010.
This publication is to be read in conjunction with IEC 62271-1:2007, and IEC 62271-100:2008.