SIST EN 50592:2017

Railway applications - Testing of rolling stock for electromagnetic compatibility with axle counters

This European Standard defines, for the purpose of ensuring compatibility between rolling stock and axle
counter systems, the measurement and evaluation methods of rolling stock emissions to demonstrate
compatibility. The established limits for compatibility are defined as magnetic field strength that can disturb
the axle counter detectors, as part of the axle counter system.
In the relevant frequency range of the axle counter detectors the magnetic field is dominant and only this
type of field is considered. Experience has shown that the effects of electric fields are insignificant and
therefore not considered.
NOTE 1 For axle counters systems whose limits are not defined in terms of magnetic fields at a detector level,
National Rules apply where they exist (for more details, see also 4.1).
NOTE 2 The influence from metal parts or inductively coupled resonant circuits on the vehicle, eddy current brakes or
magnetic brakes is out of the scope of this EN. Compatibility is established through individual testing according to the
EN 50238 series or National Notified Technical Rules.

Bahnanwendungen - Prüfung von Fahrzeugen auf elektromagnetische Verträglichkeit mit Achszählern

Zur Sicherstellung der Verträglichkeit zwischen Schienenfahrzeugen und Achszählersystemen legt diese Europäische Norm die Mess- und Bewertungsverfahren für die Emissionen von Schienenfahrzeugen fest, um die Verträglichkeit nachzuweisen. Die bestehenden Grenzwerte für die Verträglichkeit sind definiert als magnetische Feldstärke, die die Achszählerdetektoren als Teil des Achszählersystems stören kann.
Innerhalb des relevanten Frequenzbereichs der Achszählerdetektoren dominiert das Magnetfeld und lediglich diese Feldart wird betrachtet. Die Erfahrung hat gezeigt, dass die Auswirkungen elektrischer Felder unbe-deutend sind und daher werden diese außer Betracht gelassen.
ANMERKUNG 1   Für Achszählersysteme, deren Grenzwerte hinsichtlich der Magnetfelder auf der Detektoren-Ebene nicht festgelegt sind, gelten - soweit vorhanden - nationale Regeln (für weitere Einzelheiten siehe auch 4.1).
ANMERKUNG 2   Der Einfluss von metallischen Teilen oder induktiv gekoppelten Resonanzkreisen auf das Fahrzeug sowie von Wirbelstrom- oder Magnetschienenbremsen liegt außerhalb des Anwendungsbereichs dieser Europäischen Norm. Die Verträglichkeit wird durch Einzelprüfungen in Übereinstimmung mit der Normenreihe EN 50238 oder notifizierten, nationalen technischen Regeln nachgewiesen.

Applications ferroviaires - Essais du matériel roulant pour la compatibilité électromagnétique avec les compteurs d'essieux

La présente Norme européenne définit, afin de garantir la compatibilité entre le matériel roulant et les compteurs d'essieux, les méthodes de mesure et d'évaluation relatives aux émissions du matériel roulant afin de démontrer la compatibilité. Les limites établies pour la compatibilité sont définies comme la force du champ magnétique qui peut perturber les compteurs d’essieux, en tant que partie du système de compteur d’essieux.
Dans la gamme de fréquences pertinente des compteurs d'essieux, le champ magnétique est fondamental et seul ce type de champ est pris en considération. L'expérience a montré que les effets des champs électriques sont insignifiants et ne sont donc pas pris en considération.
NOTE 1   Pour les compteurs d'essieux dont les limites ne sont pas définies en termes de champ magnétique, la Réglementation nationale doit s'appliquer (pour plus d’informations, se référer également au paragraphe 4.1).
NOTE 2   L'influence des pièces métalliques ou des circuits résonants accouplés par induction sur le véhicule, les freins par courants de Foucault ou les freins magnétiques ne relève pas du domaine d'application de l'EN. La compatibilité est établie par le biais d'essais individuels selon la série EN 50238 ou les Règles techniques nationales notifiées.

Železniške naprave - Preskušanje elektromagnetne združljivosti voznih sredstev s števci osi

Ta evropski standard opredeljuje metode merjenja in ocenjevanja sevanja voznih sredstev za prikaz združljivosti za namene zagotavljanja združljivosti voznih sredstev s sistemi števcev osi. Določene mejne vrednosti za združljivost so opredeljene kot jakost magnetnega polja, ki lahko moti detektorje števila osi kot dele sistema števca osi.
V ustreznem frekvenčnem razponu detektorjev števila osi je jakost magnetnega polja dominantna in se upošteva samo ta vrsta polja. Izkušnje kažejo, da so vplivi električnih polj zanemarljivi in se zato ne upoštevajo.
OPOMBA 1: Za sisteme števcev osi, pri katerih mejne vrednosti niso opredeljene v okviru magnetnih polj na ravni detektorja,
se uporabljajo nacionalni predpisi, če obstajajo (za več podrobnosti glej tudi točko 4.1).
OPOMBA 2: Vplivi kovinskih delov ali induktivno spojenih resonančnih tokokrogov na vozilo, zavore na vrtinčne tokove ali magnetne zavore so zunaj področja uporabe tega standarda EN. Združljivost se vzpostavi na podlagi posameznega preskušanja v skladu s skupino standardov EN 50238 ali nacionalnimi tehničnimi pravili.

General Information

• Status: Published
• Public Enquiry End Date: 30-Nov-2014
• Publication Date: 13-Mar-2017
• ICS: 33.100.01 - Electromagnetic compatibility in general
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: ŽEN - Electrical applications for railways
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Mar-2017
• Due Date: 11-May-2017
• Completion Date: 14-Mar-2017
• Directive: 2008/57/EC - Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Mandate: M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
• Ref Project: EN 50592:2016 - Railway applications - Testing of rolling stock for electromagnetic compatibility with axle counters

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 50592:2017
01-april-2017
Železniške naprave - Preskušanje elektromagnetne združljivosti voznih sredstev s
števci osi

Railway applications - Testing of rolling stock for electromagnetic compatibility with axle

counters

Bahnanwendungen - Prüfung von Fahrzeugen auf elektromagnetische Verträglichkeit mit

Achszählern
Applications ferroviaires - Essais du matériel roulant pour la compatibilité
électromagnétique avec les compteurs d'essieux
Ta slovenski standard je istoveten z: EN 50592:2016
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN 50592:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50592:2017
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SIST EN 50592:2017
EUROPEAN STANDARD EN 50592
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2016
ICS 29.280; 45.060.10
English Version
Railway applications - Testing of rolling stock for electromagnetic
compatibility with axle counters

Applications ferroviaires - Essais du matériel roulant pour la Bahnanwendungen - Prüfung von Fahrzeugen auf

compatibilité électromagnétique avec les compteurs elektromagnetische Verträglichkeit mit Achszählern

d'essieux

This European Standard was approved by CENELEC on 2016-07-22. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50592:2016 E
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EN 50592:2016 (E)
Contents Page

European foreword ............................................................................................................................................. 4

Introduction ......................................................................................................................................................... 5

1 Scope ......................................................................................................................................................... 6

2 Normative references ............................................................................................................................... 6

3 Terms, definitions and abbreviations .................................................................................................... 6

3.1 Terms and definitions ....................................................................................................................... 6

3.2 Abbreviations ................................................................................................................................... 8

4 Measurement specification for vehicle emissions ............................................................................... 9

4.1 Rolling stock emission limits ............................................................................................................ 9

4.2 Methodology for the demonstration of vehicle compatibility ............................................................ 9

4.2.1 General approach ............................................................................................................................ 9

4.2.2 Measurement antenna ................................................................................................................... 10

4.2.3 Vehicle test conditions ................................................................................................................... 12

4.2.4 Infrastructure conditions ................................................................................................................. 15

4.2.5 Uncertainty and calibration ............................................................................................................ 15

5 Measurement and evaluation methods ................................................................................................ 15

5.1 Method based on the frequency management of the TSI CCS interface document ..................... 15

5.1.1 Principle ......................................................................................................................................... 15

5.1.2 Procedure ....................................................................................................................................... 16

5.1.3 Evaluation of short duration interference ....................................................................................... 18

5.2 Method for RST compatibility with individual axle counter detectors ............................................. 18

5.2.1 General .......................................................................................................................................... 18

5.2.2 Principle ......................................................................................................................................... 18

5.2.3 Procedure ....................................................................................................................................... 19

5.2.4 Evaluation of short duration interference ....................................................................................... 20

Annex A (informative) Design guide for rolling stock measurement antennas — Measurement antennas

characteristics ........................................................................................................................................ 21

Annex ZZ (informative) Relationship between this European Standard and the Essential Requirements

of EU Directive 2008/57/EC .................................................................................................................... 22

Bibliography ...................................................................................................................................................... 24

Figures

Figure 1 — Orientation of the coordinates....................................................................................................... 7

Figure 2 — Examples of IUs .............................................................................................................................. 8

Figure 3 — Measurement antenna .................................................................................................................. 10

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Figure 4 — Centre point coordinates ............................................................................................................. 11

Figure 5 — Mounting measurement antenna between two sleepers .......................................................... 12

Figure 6 — Speed ranges, tractive effort (force) (Z) – speed (v), speed power point (Vpp), diagram

(examples) ............................................................................................................................................... 14

Figure 7 — Test method based on TSI requirements ................................................................................... 16

Figure 8 — One series of band-pass filters ................................................................................................... 17

Figure 9 — Test method for compatibility with individual axle counter detectors .................................... 19

Figure 10 — Broadband evaluation on the tolerance range of centre frequency ...................................... 20

Figure A.1 — Top and side view (Y and Z coils, dimensions 50 mm by 150 mm, X coil dimension

50 mm by 50 mm) ................................................................................................................................... 21

Tables

Table 1 — Y1 and Z1 coordinates of the measurement antennas centre point ......................................... 11

Table ZZ.1 — Correspondence between this European Standard, the CCS TSI (DECISION 2012/88/EU

of 25 January 2012, DECISION 2012/696/EU of 6 November 2012 amending Decision 2012/88/EU,

DECISION 2015/14/EU of 5 January 2015 amending Decision 2012/88/EU) and

Directive 2008/57/EC .............................................................................................................................. 22

Table ZZ.2 — Correspondence between this European Standard, the TSI “Locomotives and Passenger

Rolling Stock” (REGULATION (EU) No 1302/2014 of 18 November 2014) and Directive 2008/57/EC23

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European foreword

This document (EN 50592:2016) has been prepared by CLC/SC 9XB “Electromechanical material on board

rolling stock” of CLC/TC 9X “Electrical and electronic applications for railways”.

The following dates are fixed:
• latest date by which this document has (dop) 2017-07-22
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2019-07-22
standards conflicting with this
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission and

the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive 2008/57/EC amended by Commission Directive 2011/18/EU,

see informative Annex ZZ, which is an integral part of this document.
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Introduction

This European Standard is being developed to permit compliance with the Railway Interoperability Directives.

The vehicle test methodology presented in this European Standard is also applicable to the demonstration of

compatibility with all types of axle counters which have established compatibility limits according to

EN 50617-2.

Compliance with the limits for rolling stock is necessary for a reliable and safe operation of the railway

system.
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EN 50592:2016 (E)
1 Scope

This European Standard defines, for the purpose of ensuring compatibility between rolling stock and axle

counter systems, the measurement and evaluation methods of rolling stock emissions to demonstrate

compatibility. The established limits for compatibility are defined as magnetic field strength that can disturb

the axle counter detectors, as part of the axle counter system.

In the relevant frequency range of the axle counter detectors the magnetic field is dominant and only this

type of field is considered. Experience has shown that the effects of electric fields are insignificant and

therefore not considered.

NOTE 1 For axle counters systems whose limits are not defined in terms of magnetic fields at a detector level,

National Rules apply where they exist (for more details, see also 4.1).

NOTE 2 The influence from metal parts or inductively coupled resonant circuits on the vehicle, eddy current brakes or

magnetic brakes is out of the scope of this EN. Compatibility is established through individual testing according to the

EN 50238 series or National Notified Technical Rules.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

EN 50238-1, Railway applications — Compatibility between rolling stock and train detection systems — Part

1: General

CLC/TS 50238-2, Railway applications — Compatibility between rolling stock and train detection systems —

Part 2: Compatibility with track circuits

CLC/TS 50238-3, Railway applications — Compatibility between rolling stock and train detection systems —

Part 3: Compatibility with axle counters

EN 50617-2, Railway Applications — Technical parameters of train detection systems for the interoperability

of the trans-European railway system - Part 2: Axle counters

CISPR 16-4-2, Specification for radio disturbance and immunity measuring apparatus and methods —

Part 4-2: Uncertainties, statistics and limit modelling — Measurement instrumentation uncertainty

ERA/ERTMS/033281, Interfaces between Control-Command and Signalling Trackside and Other

Subsystems
3 Terms, definitions and abbreviations
3.1 Terms and definitions

For the purposes of this document, the terms, definitions and abbreviations given in EN 50238 (all parts) and

the following apply.
3.1.1
axle counter detector

detector consisting of the axle counter sensor and of the detection circuit, which includes in general filters

and rectifiers
[SOURCE: EN 50617-2:2015, 3.1.2]
3.1.2
axle counter sensor
sensor head mounted in the track
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[SOURCE: EN 50617-2:2015, 3.1.3]
3.1.3
axle counter system

whole system, including the axle counter detector with its sensor and the evaluation unit

[SOURCE: EN 50617-2:2015, 3.1.4]
3.1.4
EMC plan

plan prepared during the rolling stock design which defines how to provide compliance with EMC

requirements, including test evidence
3.1.5
European Train Control System
ETCS

signalling, control and train protection system utilizing balise transmission technology

3.1.6
in-band
working frequency area of an axle counter detector
[SOURCE: EN 50617-2:2015, 3.1.9]
3.1.7
influencing unit
rolling stock influencing the train detection system

Note 1 to entry: One influencing unit comprises all coupled/connected vehicles, e.g. a complete train with single or

multiple traction, single vehicle, single wagon, multiple connected/coupled vehicles and wagons. For locos and coaches,

if conditions in 4.2.3.1 are clarified, it is considered sufficient to test only one of them if only identical ones are used in

one IU.
3.1.8
integration time

parameter for evaluation defined as the window size over which the root mean square (rms) of the output of

the band-pass filter is calculated
[SOURCE: EN 50617-2:2015, 3.1.12]
3.1.9
measurement antenna
antenna, mounted on the rail to capture three dimensional magnetic field
Note 1 to entry: The measurement covers the axes X, Y and Z as follows:
Figure 1 — Orientation of the coordinates
[SOURCE: EN 50617-2:2015, 3.1.13]
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3.1.10
traction unit
locomotive, motor coach or train unit

Note 1 to entry: For the purposes of this standard, the traction unit is defined as a subset of one locomotive, motor coach

or train-unit.
1 IU 1 TU
1 Locomotive + Freight
train
1 IU 2 TU
2 Locomotives + Freight
train
1 IU 1 TU
1 Locomotive + Passenger
train
1 IU 1 TU
1 EMU
1 IU 2 TU
2 EMUs
1 IU 4 TU 4 Locomotives
Figure 2 — Examples of IUs
[SOURCE: IEC 60050-811: CDV2015, 811-02-04]
3.1.11
start
start frequency

lowest frequency of the axle counter detector’s operating band which also defines the centre frequency of

the first of the series of band-pass filters for data processing
3.1.12
stop
stop frequency

highest frequency of the axle counter detector’s operating band which also defines the centre frequency of

the last of the series of band-pass filters for data processing
3.1.13
speed (velocity) power point

transition point of the tractive effort from a linear to a hyperbolic function, which corresponds to the highest

speed achieved by that force
3.2 Abbreviations

For the purposes of this document, the abbreviations given in EN 50238 (all parts) and the following apply.

4QC Four Quadrant Converter
Alternating current
A/D Analogue to Digital converter
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EN 50592:2016 (E)
CCS Control Command and Signalling
DC Direct Current
EMC Electromagnetic Compatibility
EMU Electrical Multiple Unit
EUT Equipment Under Test
ETCS European Train Control System
FFT Fast Fourier Transformation
HFR Higher Frequency Range
IU Influencing Unit
LFR Lower Frequency Range
MA Measurement Antenna
NNTR Notified National Technical Rules
PWM Pulse Width Modulation
rms Root Mean Square
RST Rolling Stock
Tint Integration time
TSI Technical Specification for Interoperability
TU Traction Unit
VSWR Voltage Standing Wave Ratio
4 Measurement specification for vehicle emissions
4.1 Rolling stock emission limits

In the scope of interoperability, limits are defined in the TSI Interface document ERA/ERTMS/033281.

Outside interoperability, individual limits are defined in CLC/TS 50238-3 or in NNTRs where these exist. In

specific application cases outside the scope of Interoperability Regulations, limit values may be notified by

the axle counter manufacturer, according to the process, defined in EN 50617-2. The RST under test shall

be defined in the context of the definition for an influencing unit. The influencing unit shall be defined in an

EMC Management Plan, depending on the sources of magnetic fields.
4.2 Methodology for the demonstration of vehicle compatibility
4.2.1 General approach

Measurements shall be performed using specified measurement antennas described in 4.2.2, under

specified operational conditions of rolling stock. Compatibility tests of vehicles can be executed with any rail

type. The influence of the type of rail on the measurement result is accounted for in the compatibility limits

and the associated margin.

The train shall be tested under the electrification system(s) for which it is to be authorized. The methodology

is also applicable to other type vehicles, as explained in 4.2.3.3.

Emissions caused by vehicles are measured as magnetic fields in X, Y and Z directions.

Ambient noise measurements shall be conducted before the tests.

If at specific frequencies or in specific frequency ranges the ambient noise is higher than the limit values less

6 dB, the measurements at these frequencies need not be considered provided there is clear evidence that

the emissions are attributable to ambient sources. These frequencies shall be noted in the test report. If the

ambient noise within the frequency bands in ERA/ERTMS/033281 or the individual limits in CLC/TS 50238-3

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is so severe (e.g. wide band noise) that it makes the assessment of the vehicle to the frequency bands

impossible, a new test at an alternative test location is required, which is not influenced by the identified

ambient disturbance.

The RST is normally tested under conditions at which maximum emissions are expected in the frequency

range considered for compatibility. Specific requirements are derived in 4.2.3.2.

NOTE Usually, it is possible to capture these emissions at low vehicle speeds. The repetition rate of the

interference is partly independent of the vehicle speed (e.g. rolling stock with four-quadrant traction and auxiliary

converters) and for rolling stock with motor inverters it is even lower at higher speeds.

4.2.2 Measurement antenna
4.2.2.1 Frequency range

The measurement chain shall cover the 10 kHz to 1,3 MHz range between the 3 dB points.

Due to the fact that the range of operating frequencies of the axle counter detectors used in Europe is from

tens of kilohertz up to 1,3 MHz, it may not be possible to achieve an acceptably low measurement

uncertainty with only one measurement antenna, to cover both the lower and the higher frequency range.

The frequency range applicable to each antenna, shall be specified:
• Lower Frequency Range (LFR): 10 kHz to 100 kHz;
• Higher Frequency Range (HFR): 100 kHz to 1,3 MHz.
4.2.2.2 Electrical surface

A rectangular 3-dimensional magnetic loop antenna with a common centre point and the following

geometrical dimensions shall be used:

• 5 cm x 5 cm (25 cm ) (loop for measurement of field along x-axis), named X-coil;

• 5 cm x 15 cm (75 cm ) (loops for measurement of field along Y- and Z- axis), named Y and Z coils. The

longest arm is always in X-direction.

Depending on the size of the wire and the number of windings, small deviations from the ideal shape of the

transducer are permitted but such deviation shall not exceed 5 %. As far as possible, the electrical surface

and the ratio shall be kept.

NOTE 1 The arm length of 15 cm is chosen such that it represents a practical optimum between the averaging of

gradient magnetic fields and the picking up of interference source with low repetition rates.

Figure 3 — Measurement antenna

NOTE 2 Additional information regarding the layout of the measurement antennas is provided in a design guide in

Annex A.
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4.2.2.3 Mounting position

Table 1 shall be used to define the mounting position of the measurement antennas for the frequency range

considered. The centre point (Y1, Z1) of the measurement antenna is derived from the arithmetic mean

value of all relevant axle counter sensor types per frequency range (LFR, HFR).
Figure 4 — Centre point coordinates

The centre point of the measurement antennas shall have the following coordinates with reference to the

central line of the rail web for Y1 and the line connecting the highest position of both railheads for Z1:

Table 1 — Y1 and Z1 coordinates of the measurement antennas centre point
Y1 (tolerances) Z1
(tolerances)
(mm)
(mm)
MA centre position (10 kHz to 1,3 MHz) 96 (−3 ; +3) 73 (−5 ; +5)

NOTE 1 Experience has demonstrated that the position of the measurement antenna within these tolerances has

negligible influence on the test result (max measured variation was below 1 dB in laboratory for Z1 between 68 mm and

78 mm).

NOTE 2 To reduce the amount of measurements it is recommended to mount the measurement antennas on both

rails to do the measurements covering from 10 kHz to 1,3 MHz frequency range for both sides of the vehicle

simultaneously.
4.2.2.4 Metal free zone

To minimize influence from earth currents and any other parasitic effects the measurement antenna shall be

placed between two sleepers, see Figure 5.

In the case of using two or more antennas, a minimum distance of 400 mm shall be utilised.

Measurements shall not be performed on a metal/iron bridge or steel sleepers.

NOTE 1 Simulation has shown that reinforcing metal in slab track or concrete metal reinforced sleepers can influence

the test results by approximately 5 %, which is considered negligible.
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400mm
Figure 5 — Mounting measurement antenna between two sleepers

NOTE 2 Antennas can be mounted closer if it is verified that mutual coupling (crosstalk) does not influence the

accuracy of the result.
4.2.2.5 Other Requirements

The antenna shall have cross polarization rejection higher than 30 dB without a rail being present.

NOTE In the case of using a preamplifier, precautions are usually taken to prevent saturation during measurement.

4.2.3 Vehicle test conditions
4.2.3.1 General

The operational requirements for compatibility tests of rolling stock depend on the technical design of rolling

stock and passenger coaches.

Any electronic apparatus with semiconductors (4QC, motor inverter, auxiliary converter, brake chopper,

battery charger, etc.) is a potential source of interference. Generally, the amplitudes of magnetic fields,

generated by railway vehicles utilizing traction converters with DC voltage link, increase proportionally to the

DC link voltage. For a disturbance of the axle counter detector at lower speeds rolling stock will, in general,

be using a fast switching (PWM) approximation of an ideal three phase sinusoidal supply. Due to the

variation of the pulses it is more likely to find a disturbance in this speed area.

The amplitude of fields induced from rail current depends on many factors, for example earthing philosophy,

the construction of the motors, gear boxes and bearings.

The actual current draw at the fundamental frequency of the main traction supply has less impact on the

amplitudes of the generated magnetic fields in the working range of the axle counter detector.

For different test runs, the maximum possible number of potential sources of emission shall be considered

for the worst case. Justification of the worst case (normal or degraded) conditions shall be prepared as part

of the test specification.

The test specification shall include a requirement to measure on both sides of the vehicle passing over the

antenna.

All individual interference sources on board the vehicle should be considered for the worst case test

conditions. For example, traction converters, auxiliary converters, heating line converters, installed train

control/safety equipment, lighting, heating, air-conditioning, restaurant power are known interference sources.

When authorization for double or multiple traction units is sought it is sufficient to test single traction units

only, provided there are no differences in comparison between single and multiple traction units regarding

the electrical behaviour (e.g. change of converter frequencies), in which case the footprint concerning

characteristic emissions remains unchanged.
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For DC traction power systems, in case there is more than -6 dB from the limit in the magnetic field values

measured before or after the passing of the individual unit, the effect of multiple units shall be considered.

No specific tests are included for transient conditions. Any short-term interference captured during the tests

are analyzed and evaluated according to the methodology presented in this standard.

If fitted on the EUT, the components of the ETCS on board the RST shall be switched on during tests. When

ETCS components are installed on board of already approved rolling stock, no additional compatibility tests

are needed.

If necessary, an additional vehicle (locomotive, load wagon) shall be used to reach the required values for

the parameters (e.g. specified traction force, specified braking force) of the tested vehicle. The influence of

the additional vehicle on the measured magnetic interference field shall be negligible or at least it shall be

possible to exclude it from the assessment. One reference test run (EUT main switch open, pantograph

down, 20 km/h to 30 km/h) shall be performed before (direction 1) and after (counter direction to 1) the

measurements. The reference test runs can also be used as environment measurements.

The number of test runs under the same operational conditions should be defined to give confidence that the

test results are reproducible. For the chosen test scenario(s), confidence can be reached if the

measurements of at least two test runs in each direction under the same operational conditions are

comparable.

Rolling stock shall be tested under the operational conditions specified in 4.2.3.2.

4.2.3.2 Operational conditions for electric and diesel/electric vehicles
4.2.3.2.1 General

The following requirements are derived for locomotives and electrical multiple units (any type, including high

speed trains and light rail vehicles). All test runs shall be performed under continuous electrical power feed.

Different requirements may be derived for other vehicles, for example hybrid vehicles. If a vehicle is

equipped for electrical braking/ energy regeneration and with brake resistors, then both shall be taken into

consideration explicitly. No braking tests are required if no different circuits are used in braking mode

compared with acceleration mode.
4.2.3.2.2 Locomotives
For locomotives, the following operational conditions shall be covered:
When passing the antenna, the vehicle shall accelerate and decel
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