EN 50125-3:2003

SLOVENSKI STANDARD
01-december-2003
Železniške naprave – Okoljski pogoji za opremo – 3. del: Oprema za signalne in
telekomunikacijske naprave
Railway applications - Environmental conditions for equipment -- Part 3: Equipment for
signalling and telecommunications
Bahnanwendungen - Umweltbedingungen für Betriebsmittel -- Teil 3:
Umweltbedingungen für Signal- und Telekommunikationseinrichtungen
Applications ferroviaires - Conditions d'environnement pour le matériel -- Partie 3:
Equipement pour la signalisation et les télécommunications
Ta slovenski standard je istoveten z: EN 50125-3:2003
ICS:
13.020.99 Drugi standardi v zvezi z Other standards related to
varstvom okolja environmental protection
33.040.99 Druga oprema za Other equipment for
telekomunikacijske sisteme telecommunication systems
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50125-3
NORME EUROPÉENNE
EUROPÄISCHE NORM January 2003

ICS 29.280
English version
Railway applications -
Environmental conditions for equipment
Part 3: Equipment for signalling and telecommunications

Applications ferroviaires -  Bahnanwendungen -
Conditions d'environnement Umweltbedingungen für Betriebsmittel
pour le matériel Teil 3: Umweltbedingungen für Signal-
Partie 3: Equipement pour la signalisation und Telekommunikationseinrichtungen
et les télécommunications
This European Standard was approved by CENELEC on 2002-12-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50125-3:2003 E
Foreword
This European Standard was prepared by SC 9XA, Communication, signalling and processing systems,
of Technical Committee CENELEC TC 9X, Electrical and electronic applications for railways.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50125-3 on
2002-12-01.
This European Standard was prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and supports the essential requirements of
Directive 96/48/EC.
The following dates were fixed:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2003-12-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-12-01

Annexes designated « normative » are part of the body of the standard.
Annexes designated « informative » are given for information only.
In this European Standard, Annexes A and C are normative and Annexes B and D are informative.

– 3 – EN 50125-3:2003
Contents
Page
1 Scope.5
2 Normative references.5
3 Definitions.6
4 Environmental conditions.7
4.1 General.7
4.2 Pressure.7
4.3 Temperature.8
4.4 Humidity.9
4.5 Wind.10
4.6 Rain.11
4.7 Snow and hail .11
4.8 Ice.11
4.9 Solar radiation.12
4.10 Lightning.12
4.11 Pollution.12
4.12 Fire protection.13
4.13 Vibrations and shocks .13
4.14 Electromagnetic compatibility.15
4.15 Power supplies.15
Annex A (normative) Climatograms.16
Annex B (informative) Examples of q and c factors .22
Annex C (normative) Vibrations .23
Annex D (informative) Example of European regions and theirs appropriate climatic classes.27
Bibliography.28
Figure A.1 - Temperature and humidity in external ambient . 16
Figure A.2 - Temperature and humidity in cubicle. 17
Figure A.3 - Temperature and humidity in shelter N.T.C. 18
Figure A.4 - Temperature and humidity in shelter T.C. . 19
Figure A.5 - Temperature and humidity in building N.C.C. 20
Figure A.6 - Temperature and humidity in building C.C. . 21
Figure C.1 - Power spectral density of vibrations on rail . 23
Figure C.2 - Power spectral density of vibrations on sleeper . 24
Figure C.3 - Power spectral density of vibrations on ballast . 25

Figure C.4 - Power spectral density of vibrations outside the track
(from 1 m to 3 m from the rail) . 26
Table 1 - Altitude relative to sea level. 7
Table 2 - Temperature ranges at different sites . 8
Table 3 - Humidity ranges at different sites. 10
Table 4 - External ambient pollution levels . 13
Table 5 - Acceleration at track side positions. 14
Table 6 - Shocks at different track side positions (vertical axis) . 14
Table B.1 - Pressure head in relation to air speed. 22
Table B.2 - Typical values of form factor c. 22

– 5 – EN 50125-3:2003
1 Scope
This European Standard specifies the environmental conditions encountered within Europe. It can also be
applied elsewhere by agreement between the supplier and the customer.
The scope of this European Standard covers the design and the use of equipment and any portable
equipment for signalling and telecommunications systems (including test, measure, monitoring
equipment, etc.).
The portable equipment must comply with the sections of this European Standard relevant to their use.
This European Standard does not specify the test requirements for equipment.
In particular the standard intends to define
– interface conditions between the equipment and its environment,
– parameters to be used by designers when calculating R.A.M.S. and life time with respect to
environmental condition effects.
In this respect it gives general guidance in order to allow consistent assessments of contract
documentation for European projects.
The defined environmental conditions are considered as normal in service.
Microclimates surrounding components may need special requirements to be defined by the product
standard.
The effects of any signalling and telecommunications equipment (in either or failure mode of operation)
on the overall signalling system safety are not within the scope of this European Standard. This European
Standard does not provide the designer with information to enable him to determine the safety risk
associated with environmental conditions. The safety of persons in the vicinity of (or working on) the
signalling and telecommunications equipment is also out of the scope of this European Standard. The
effects of vandalism on the equipment are not considered in this European Standard.
This European Standard applies to all signalling and telecommunications systems except those used for
cranes, mining vehicles and cable cars. It does not define the specifications for train-borne signalling and
telecommunications systems.
The train-borne signalling and telecommunications systems must comply with rolling stock environmental
conditions specifications (EN 50125-1).
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this European Standard only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies (including amendments).
EN 50121-1 Railway applications – Electromagnetic compatibility – Part 1: General
EN 50121-2 Railway applications – Electromagnetic compatibility – Part 2: Emission of the
whole railway system to the outside world
EN 50121-4 Railway applications – Electromagnetic compatibility – Part 4: Emission and
immunity of the signalling and telecommunications apparatus

EN 50124-2 Railway applications – Insulation coordination – Part 2: Overvoltages and
related protection
EN 50125-1 1999 Railway applications – Environmental conditions for equipment – Part 1:
Equipment on board rolling stock
EN 60529 1991 Degrees of protection provided by enclosures (IP code) (IEC 60529:1989)
EN 60721-3-3 1995 Classification of environmental conditions – Part 3: Classification of groups of
environmental parameters and their severities – Section 3: Stationary use at
weather protected locations (IEC 60721-3-3:1994)
EN 60721-3-4 1995 Classification of environmental conditions – Part 3: Classification of groups of
environmental parameters and their severities – Section 4: Stationary use at
non-weather protected locations (IEC 60721-3-4:1995)
HD 478.2.1 S1 1989 Classification of environmental conditions – Part 2: Environmental conditions
appearing in nature – Temperature and humidity
(IEC 60721-2-1:1982 + A1:1987)
HD 478.2.3 S1 1990 Classification of environmental conditions – Part 2: Environmental conditions
appearing in nature – Air pressure (IEC 60721-2-3:1987)
ISO 4354 Wind actions on structures
3 Definitions
For the purposes of this standard, the following definitions apply:
3.1
environmental conditions
range of physical, chemical, electrical and biological conditions external to the equipment to which it is
subjected in service
3.2
equipment housing
case, or other prote
...