IEC 62505-3-1:2009

Railway applications - Fixed installations - Particular requirements for a.c. switchgear - Part 3-1: Measurement, control and protection devices for specific use in a.c. tractions systems - Application guide

IEC 62505-3-1:2009 provides assistance, guidance and requirements in the design of protection, control and measuring systems in a.c. installations at traction voltages (see IEC 60850) intended to provide a power supply to traction systems. This application guide identifies the characteristics and parameters of equipment used in the measurement, control and protection of a.c. traction systems. Guidance is given in the correct use of protection.

Applications ferroviaires - Installations fixes - Exigences particulières pour appareillage à courant alternatif - Partie 3-1: Dispositifs de mesure, de commande et de protection pour usage spécifique dans les systèmes de traction à courant alternatif - Guide d'application

La CEI 62505-3-1:2009 apporte une assistance, donne une ligne directrice et indique les exigences relatives à la conception des systèmes de mesure, de commande et de protection des installations à des tensions en courant alternatif (voir la CEI 60850) destinées à alimenter des systèmes de traction. Ce guide d'application identifie les caractéristiques et les paramètres des matériels utilisés pour la mesure, la commande et la protection des systèmes de traction à courant alternatif. Elle sert de préconisation pour une utilisation correcte de la protection.

General Information

• Status: Published
• Publication Date: 09-Mar-2009
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Current Stage: DELPUB - Deleted Publication
• Start Date: 31-Dec-2018
• Completion Date: 11-Mar-2020

Relations

• Revised: IEC 62505-3-1:2020 - Railway applications - Fixed installations - Particular requirements for AC switchgear - Part 3-1: Measurement, control and protection devices for specific use in AC tractions systems - Devices
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62505-3-1


®

Edition 1.0 2009-03



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE


Railway applications – Fixed installations – Particular requirements for a.c.
switchgear –
Part 3-1: Measurement, control and protection devices for specific use in a.c.
traction systems – Application guide

Applications ferroviaires – Installations fixes – Exigences particulières pour
appareillage à courant alternatif –
Partie 3-1: Dispositifs de mesure, de commande et de protection pour usage
spécifique dans les systèmes de traction à courant alternatif – Guide
d'application


IEC 62505-3-1:2009

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED


Copyright © 2009 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by

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---------------------- Page: 2 ----------------------
IEC 62505-3-1


®

Edition 1.0 2009-03



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE


Railway applications – Fixed installations – Particular requirements for a.c.
switchgear –
Part 3-1: Measurement, control and protection devices for specific use in a.c.
traction systems – Application guide

Applications ferroviaires – Installations fixes – Exigences particulières pour
appareillage à courant alternatif –
Partie 3-1: Dispositifs de mesure, de commande et de protection pour usage
spécifique dans les systèmes de traction à courant alternatif – Guide
d'application


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 45.060 ISBN 978-2-88910-747-6
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 62505-3-1 © IEC:2009



CONTENTS

FOREWORD.3


INTRODUCTION.5

1 Scope.6

2 Normative references.6


3 Measurement.6

4 Closing control systems .6

4.1 General .6

4.2 Anti-pumping .7
4.3 Auto-reclose with variable reclose time and final lock out .7
4.4 Undervoltage close inhibit.7
4.5 Line test device .7
5 Protection systems .8
5.1 Protection system of line circuit-breakers .8
5.2 Protection system of feeder circuit-breakers.9
5.2.1 Autotransformer application .9
5.2.2 Other applications.9
5.3 Protection system for the incoming circuit-breaker, if applicable .9
Bibliography .10

Figure 1 – Example for a line test device .8

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62505-3-1 © IEC:2009 – 3 –


INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________



RAILWAY APPLICATIONS –

FIXED INSTALLATIONS –

PARTICULAR REQUIREMENTS FOR AC SWITCHGEAR –



Part 3-1: Measurement, control and protection devices

for specific use in a.c. traction systems –

Application guide



FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62505-3-1 has been prepared by IEC technical committee 9:
Electrical equipment and systems for railways. This standard is based on EN 50152-3-1.
The text of this standard is based on the following documents:
FDIS Report on voting
9/1221/FDIS 9/1234/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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A list of all parts of IEC 62505 series, under the general title Railway applications – Fixed

installations – Particular requirements for a.c. switchgear, can be found on the IEC website.


The committee has decided that the contents of this publication will remain unchanged until the

maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be


• reconfirmed,

• withdrawn,

• replaced by a revised edition, or

• amended.

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62505-3-1 © IEC:2009 – 5 –


INTRODUCTION


IEC 62505-3 is divided as follows:


– Part 3-1: Application guide;

– Part 3-2: Single-phase current transformers;


– Part 3-3: Single-phase inductive voltage transformers.

This number of parts is subject to future additions as soon as a protection device is considered

suitable for standard requirements.


Part 3-1 is a guide. Further parts are normative and apply when the equipment is concerned
with the specified characteristics.

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– 6 – 62505-3-1 © IEC:2009


RAILWAY APPLICATIONS –

FIXED INSTALLATIONS –

PARTICULAR REQUIREMENTS FOR AC SWITCHGEAR –



Part 3-1: Measurement, control and protection devices

for specific use in a.c. traction systems –

Application guide







1 Scope
This part of IEC 62505 provides assistance, guidance and requirements in the design of
protection, control and measuring systems in a.c. installations at traction voltages (see
IEC 60850) intended to provide a power supply to traction systems. This application guide
identifies the characteristics and parameters of equipment used in the measurement, control
and protection of a.c. traction systems. Guidance is given in the correct use of protection.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 62505 (all parts), Railway applications – Fixed installations – Particular requirements for
a.c. switchgear
IEC 60850, Railway applications – Supply voltages of traction systems
3 Measurement
Two types of measurements are made:
a) measurement of current and voltage signals for connecting to instruments and
telemetering;
b) measurement of current and voltage signals used for operating protection relays on over-
current, low impedance, over/under-voltage and short circuit or distance protection.

The class, ratio and burden should be selected from the values in IEC 62505-3-2 or
IEC 62505-3-3. The accuracy and purpose are dependant on the class selected.
4 Closing control systems
4.1 General
The application of the features described below depends on the philosophy of the user’s
control system.
Closing control systems are usually only those which involve the electrical closing of switchgear
devices. Their effect is to permit or inhibit a closure depending on the status of the system (and
plant) and the compliance of specified requirements.

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62505-3-1 © IEC:2009 – 7 –


4.2 Anti-pumping


This system limits the closing device to effect a single attempt while the signal to close is

maintained. If the device fails to complete a satisfactory close operation whilst the close signal

is maintained, then attempts at further reclosing (pumping) are inhibited.


An anti-pumping can be achieved in the closing control circuit in various ways, either by using

circuit-breaker mechanism auxiliary switches or a timing relay. It only allows a single closing

pulse to the closing device, which resets when the initial closing signal is released.


The purchaser should specify the need for anti-pumping feature.

4.3 Auto-reclose with variable reclose time and final lock out
Auto-reclose is only applied to line circuit-breakers and its purpose is to restore the system
voltage to the overhead contact line automatically when there is a temporary loss of supply.
On traction systems a temporary loss of supply is not always due to permanent short circuits
and an auto-reclose system can enhance the reliability of the system.
Auto-reclose is usually associated with a timing device which gives several attempts at
reclosing with varying adjustable intervals of circuit dead time. After a prescribed number of
unsuccessful recloses, then a lock out of the reclosing circuit should be instigated. The lock out
relay may then be either electrically or manually reset.
The purchaser should specify the need for this requirement and the following information:
a) number of recloses: e.g. 2 recloses then lock out;
b) reclosing time intervals: e.g. 0,3 s, followed by 180 s, followed by 180 s (see 5.17 of
IEC 62505-1);
c) lock out reset: i.e. local or remote.
4.4 Undervoltage close inhibit
When used and fitted to an incoming circuit-breaker on the secondary side of the traction
transformer, the voltage signal is the voltage of the transformer. Unless the supply is available
the circuit-breaker cannot be closed.
When fitted to a line circuit-breaker, the voltage signal is that of the busbar. Unless the busbar
traction voltage is live, the line circuit-breaker cannot be closed.
The loss of the voltage signal should give an alarm or automatic tripping of all circuits

connected thereto. This effect is achieved by undervoltage relays or other suitable voltage
detecting devices with accurate pick up and drop off voltage levels, operating on to shunt trip
devices and close inhibits.
The purchaser should specify the need for undervoltage close inhibit and the following
information:
a) minimum pick up voltage   kV;
b) maximum drop off voltage  kV.
4.5 Line test device
Line test devices are used on line circuit-breakers before closing, to prevent the line circuit-
breaker closing on to a short circuit.
This is achieved by inserting a resistor by means of a suitably rated switch or switch-
disconnector between the switchboard busbar and the overhead contact line. The load
impedance acts as a footing resistance to the inserted resistor and, by measuring the voltage

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between feeder and return circuit, it can allow or inhibit a close signal. An example for a line

test circuit is shown in Figure 1.



Feeder busbar

Incoming circuit-breaker



Switch-disconnector
Line circuit-breaker


Fuse

Line test resistor
Fuse
Line
Voltage transformer
IEC  273/09

Figure 1 – Example for a line test device
When the measured voltage is low or below a prescribed level, when there is an overload on
the line, the close is inhibited. When this voltage is above a prescribed level, then there is
probably only a standing vehicle and the close is permitted.
Line test devices may be coupled with auto-reclose schemes, thereby inhibiting a reclose if the
original trip was due to a fault which had not cleared itself in the dead time.
Line test devices can be by-passed if the line is already live from the line circuit-breaker at the
remote end.
The purchaser should specify the need for a line test device and the following information:
a) value of the resistor and, by consequence, the current value to be chosen from 5 A to 25 A;
b) whether the line test device is combined with auto-reclose.

5 Protection systems
5.1 Protection system of line circuit-breakers
Line circuit-breakers are only required to trip the faults on their own section of line.
The protection relays should be selected to have characteristics and settings which will
discriminate between heavy load caused by trains on their section of line and faults of the line
itself.
The characteristics may be selected from the following types of relays:
a) high set instantaneous overcurrent, with or without a variable time delay. Usually for close
up faults;
b) impedance relay with a specified characteristic (e.g. to protect the overhead contact line);

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62505-3-1 © IEC:2009 – 9 –


c) inverse time delay with selective pick up and time multiplier (e.g. to protect the overhead

contact line);

d) same as c) but with thermal time constant to improve the protection of the overhead

contact line;


e) reverse current, able to detect a current flowing from overhead contact line to the incoming
power supply. To discriminate regenerating current and a current due to a fault within the

power supply network;


f) loss of busbar voltage should give an alarm or automatic tripping of all line circuit-breakers
connected thereto.

All relays are to be designed, manufactured and tested to the relevant standards. An

informative list of the main applicable standards is given in the Bibliography.
5.2 Protection system of feeder circuit-breakers
5.2.1 Autotransformer application
If the circuit-breaker of the “negative” feeder cable is mechanically or electrically interlocked
with the circuit-breaker feeding the overhead contact line, then a common protection scheme
may be used.
If these circuit-breakers are not interlocked, then a separate protection scheme for the
“negative” feeder is needed for each circuit-breaker.
5.2.2 Other applications
The protection system should take into account special types of faults, depending on the
feeder/overhead contact line application, which may involve the following:
– long feeder cables;
– feeder to overhead contact line;
– “+” feeder to “-” feeder;
– feeder to protective wire;
– overhead contact line to protective wire;
– feeder to earth (where protective wire is isolated from earth);
– overhead contact line to earth (earth to limit ground return currents);
NOTE This can be considered as evolving faults as the nominal insulation of the protective wire system (3 kV
typically) flashes over.
– return circuits, where booster transformers are installed.

For single phase incoming feeders at traction voltage associated with the railway systems, unit
protection may be applied. This may take the form of current differential protection, using pilot
wires or other communications between the feeder terminals.
5.3 Protection system for the incoming circuit-breaker, if applicable
The incoming circuit-breaker may be fitted with a unit protection scheme for transformer
protection or busbar protection on a multiline substation.
The protection system on this circuit-breaker should have higher settings and longer time
delays than that of the line circuit-breaker to act as a back up to the line circuit-breaker.

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Bibliography


IEC 60255-5:2000, Electrical relays – Part 5: Insulation coordination for measuring relays and

protection equipment – Requirements and tests


IEC 60255-6:1988, Electrical relays – Part 6: Measuring relays and protection equipment



IEC 60255-16:1982, Electrical relays – Part 16: Impedance measuring relays


IEC 60255-21-1:1988, Electrical relays – Part 21: Vibration, shock, bump and seismic tests on

measuring relays and protection equipment – Section 1: Vibration tests (sinusoidal)
IEC 60255-21-2:1988, Electrical relays – Part 21: Vibration, shock, bump and seismic tests on
measuring relays and protection equipment – Section 2: Shock and bump tests
IEC 60255-22-1:2007, Measuring relays and protection equipment – Part 22-1: Electrical
disturbance tests – 1 MHz burst immunity tests
IEC 60255-22-2:2008, Measuring relays and protection equipment – Part 22-2: Electrical
disturbance tests – Electrostatic discharge tests
IEC 60255-22-3:2007, Measuring relays and protection equipment – Part 22-3: Electrical
disturbance tests – Radiated electromagnetic field immunity
IEC 60255-22-4:2008, Measuring relays and protection equipment – Part 22-4: Electrical
disturbance tests – Electrical fast transient/burst immunity test
IEC 60688:2002, Electrical measuring transducers for converting a.c. electrical quantities to
analogue or digital signals
IEC 60870-2-1:1995, Telecontrol equipment and systems – Part 2: Operating conditions –
Section 1: Power supply and electromagnetic compatibility
IEC 61810-2:2005, Electromechanical elementary relays – Part 2: Reliability
___________

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SOMMAIRE

AVANT PROPOS .13


INTRODUCTION.15

1 Domaine d'application.16

2 Références normatives .16


3 Mesure .16

4 Systèmes de commande de fermeture .16

4.1 Généralités.16

4.2 Antipompage .17
4.3 Réenclenchement automatique avec temporisation variable et verrouillage
définitif .17
4.4 Dispositif de blocage de la fermeture en cas de baisse de tension.17
4.5 Dispositif d'essai de ligne.18
5 Systèmes de protection.19
5.1 Systèmes de protection des disjoncteurs de ligne .19
5.2 Systèmes de protection des disjoncteurs de ligne .19
5.2.1 Application pour autotransformateur.19
5.2.2 Autres applications .19
5.3 Systèmes de protection du disjoncteur d’arrivée, le cas échéant.20
Bibliographie .21

Figure 1 – Exemple de dispositif d'essai de la ligne .18

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62505-3-1 © CEI:2009 – 13 –


COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE

____________



APPLICATIONS FERROVIAIRES –

INSTALLATIONS FIXES –

EXIGENCES PARTICULIÈRES

POUR APPAREILLAGE À COURANT ALTERNATIF –



Partie 3-1: Dispositifs de mesure, de commande et de protection pour

usage spécifique dans les systèmes de traction à courant alternatif –

Guide d'application


AVANT PROPOS
1) La Commission Électrotechnique Internationale (CEI) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes internationales,
des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des
Guides (ci-après dénommés "Publication(s) de la CEI"). Tout comité national de la CEI intéressé par le sujet
traité peut prendre part à ces travaux préliminaires. Des organismes internationaux, gouvernementaux ou non
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étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des conditions fixées par accord
entre les deux organisations.
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du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de la CEI
intéressés sont représentés dans chaque comité d’études.
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comme telles par les Comités nationaux de la CEI. Tous les efforts raisonnables sont entrepris afin que la CEI
s'assure de l'exactitude du contenu technique de ses publications; la CEI ne peut pas être tenue responsable de
l'éventuelle mauvaise utilisation ou interpr
...