SIST EN 50125-3:2003
(Main)Railway applications - Environmental conditions for equipment -- Part 3: Equipment for signalling and telecommunications
Railway applications - Environmental conditions for equipment -- Part 3: Equipment for signalling and telecommunications
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).
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
Železniške naprave – Okoljski pogoji za opremo – 3. del: Oprema za signalne in telekomunikacijske naprave
General Information
- Status
- Published
- Publication Date
- 30-Nov-2003
- Technical Committee
- ŽEN - Electrical applications for railways
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
Relations
- Effective Date
- 23-Jan-2024
Overview
EN 50125-3:2003 (CLC) is the European standard that defines the environmental conditions for signalling and telecommunications equipment used in railway applications. It specifies the interface conditions between equipment and its environment and the environmental parameters designers should use when calculating R.A.M.S. (Reliability, Availability, Maintainability, Safety) and equipment lifetime with respect to environmental effects. The standard covers fixed and portable signalling/telecom equipment (including test and monitoring instruments) installed in cubicles, shelters/containers and buildings. It is normative across Europe and may be applied elsewhere by agreement between supplier and customer.
Key topics and technical requirements
- Scope and exclusions
- Applies to signalling and telecommunications systems (excludes cranes, mining vehicles, cable cars and train‑borne systems - the latter fall under EN 50125-1).
- Does not specify test procedures, safety risk assessment or vandalism effects.
- Environmental parameters defined
- Temperature ranges for external ambient and internal locations (cubicles, shelters, buildings) across climatic classes (examples are specified in tabular form).
- Pressure/altitude classes (A1, A2, AX) and tunnel pulse pressure effects (typical ΔP ≈ ±5 kPa; ΔP/Δt ≈ 0.5–1 kPa/s).
- Humidity, wind, rain, snow, ice, solar radiation, lightning, pollution, fire protection, vibrations and shocks, electromagnetic compatibility, power supplies.
- Equipment types & enclosures
- Definitions and design implications for equipment housing, cubicle, shelter/container, and building (including climatic control classes).
- Supporting data and annexes
- Normative annexes include climatograms and vibration spectra; informative annexes provide factors and regional examples to support consistent specification.
Practical applications - who uses EN 50125-3
- Signalling and telecommunications equipment designers - to define environmental interface parameters for product specifications and RAMS studies.
- System integrators and contractors - to prepare and assess tender/contract documentation with consistent environmental classes.
- Railway operators / asset owners - to specify environmental requirements for procurements and site installations.
- Qualification and reliability engineers - to select design margins and lifetime models based on standardised environmental inputs.
- Standards writers and test laboratories - as a reference for environmental boundary conditions (note: test methods are not provided by this standard).
Related standards
- EN 50125-1 (rolling stock environmental conditions)
- EN 50121 series (electromagnetic compatibility)
- EN 50124-2 (insulation/overvoltages)
- IEC/EN standards for IP codes and environmental classification (e.g., IEC 60529, EN 60721)
Keywords: EN 50125-3, railway environmental conditions, signalling equipment, telecommunications equipment, CENELEC, RAMS, temperature ranges, vibration, EMC, altitude, climatograms.
Frequently Asked Questions
SIST EN 50125-3:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Railway applications - Environmental conditions for equipment -- Part 3: Equipment for signalling and telecommunications". This standard covers: 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).
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).
SIST EN 50125-3:2003 is classified under the following ICS (International Classification for Standards) categories: 13.020.99 - Other standards related to environmental protection; 33.040.99 - Other equipment for telecommunication systems; 45.060.01 - Railway rolling stock in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 50125-3:2003 has the following relationships with other standards: It is inter standard links to oSIST prEN 50125:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 50125-3:2003 is associated with the following European legislation: EU Directives/Regulations: 2001/16/EC, 2008/57/EC, 2010-01-4558, 2016/797/EU, 96/48/EC; Standardization Mandates: M/024. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN 50125-3:2003 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
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 protective housing, provided by the manufacturer to mount his equipment and protect it
from accidental damage, and occasionally from EMC or environmental effects. It may offer protection to
personnel e.g. from electric shock.
Where the equipment housing provides the full required environmental protection, then it is treated as a
cubicle to define the relevant environmental parameters.
The housing normally contains only the single suppliers' equipment, and is only a part of a signalling or
telecommunications system
3.3
cubicle
housing for apparatus which normally is used to co-locate various parts of the signalling or
telecommunications system equipment, on occasion from different suppliers. It may contain various
equipment housings installed within the cubicle and offers further environmental protection.
A cubicle is normally only used to install apparatus and is in general not sufficiently large to afford
protection from weather to staff working on the apparatus.
No climatic or temperature control is provided on cubicles but ventilation or occasionally fan assisted
ventilation is required.
Large housings which allow access to personnel but do not have the thermal properties of shelters,
should be treated as cubicles
– 7 – EN 50125-3:2003
3.4
shelter/container
shelters/containers are normally provided when a larger volume of equipment is to be co-located at a
single point or temperature/humidity sensitive equipment is to be installed.
Shelters/containers normally have double walls with insulation material (or an air gap) between them.
Shelters/containers also normally have limited facilities for personnel.
Shelters/containers may also be provided with temperature control, especially where temperature
sensitive apparatus is installed.
Where shelters/containers are fitted with climatic control (temperature and humidity control), they shall be
treated as buildings with climatic control (buildings C.C.)
3.5
building
permanent construction provided with main services (e.g. water, electricity, gas,.) designed to protect
equipment against the action of environmental conditions. A building may or may not be provided with
climatic control
4 Environmental conditions
4.1 General
In the text, normal environmental conditions for Europe are classified with a suffix 1, 2, and special
conditions with a suffix X.
The customer shall specify clearly in his technical specification the required class for each environmental
parameter. If no class is specified, the class with suffix 1 shall be assumed.
The severities specified are those which will have a low probability of being exceeded. All specified
values are maximum or limit values. These values may be reached, but do not occur permanently.
Depending on the situation there may be different frequencies of occurrence related to a certain period of
time. Such frequencies of occurrence have not been included in this European Standard, but should be
considered for any environmental parameter.
They should additionally be specified if applicable.
4.2 Pressure
4.2.1 Altitude
Table 1 gives the different classes of altitude relative to sea level at which the equipment shall perform as
specified.
Table 1 - Altitude relative to sea level
Classes Altitude range relative to
sea level
m
A1 up to 1 400
A2 up to 1 000
AX more than 1 400
Using AX class, the maximum altitude shall be specified by the customer.
Altitude is relevant, in particular for the air pressure level and its consequence on cooling systems. The
air pressure shall be considered according to HD 478.2.3.
4.2.2 Pulse pressure
Particular local air pressure conditions may exist due to the effects of trains running through a tunnel.
The typical variation of pressure caused by train entering tunnel is:
ΔP = ± 5 kPa
The associated rate of change of pressure is:
ΔP/Δt = 0,5 to 1 kPa/s
4.3 Temperature
Table 2 shows the overall system air temperature parameters.
Table 2 - Temperature ranges at different sites
a b a b
In shelter In building
Climatic External
a b
In cubicle
classes ambient c d c e
N.T.C. T.C. N.C.C. C.C.
T1 (-25 +40) °C (-25 +70) °C (-5 +55) °C (+15 +30) °C (0 +45) °C (+18 +27) °C
T2 (-40 +35) °C (-40 +65) °C (-20 +50) °C (+15 +30) °C (-5 +40) °C (+18 +27) °C
TX (-55 +40) °C (-55 +70) °C (-35 +55) °C (+15 +30) °C (-5 +45) °C (+18 +27) °C
a
The temperatures inside cubicle, shelter or building are values measured in free air not directly adjacent to heat emitting
elements.
b
The maximum temperatures inside a cubicle, a shelter N.T.C. and a building N.C.C. are higher than max. ambient temperatures
because of the effects of solar radiation and power dissipation of installed equipment
c
The higher values of lowest temperatures compared to those for external ambient are due to heat emitting equipment.
d
3K2 of EN60721-3-3
e
3K1 of EN60721-3-3
C.C. : with climatic control. T.C. : with temperature control.
N.C.C. : without climatic control N.T.C. : without temperature control
The above table was derived from HD 478.2.1 where open air temperatures are measured 2 m above
ground. All classes have been extended at the lower temperatures to allow for installation of signalling
and telecommunications equipment at ground lev
...
Die Norm SIST EN 50125-3:2003 spielt eine entscheidende Rolle im Bereich der Bahnanwendungen, insbesondere hinsichtlich der Umweltbedingungen, die für die Ausrüstung in Signalisierungs- und Telekommunikationssystemen relevant sind. Sie legt die spezifischen Umweltbedingungen fest, die innerhalb Europas herrschen und kann auch außerhalb Europas nach Vereinbarung zwischen Lieferant und Kunde angewendet werden. Dieser internationale Standard ist von großer Bedeutung, da er die Gestaltung und den Einsatz von Geräten sowie tragbaren Einrichtungen für die vorgenannten Systeme abdeckt, einschließlich Prüf- und Messtechnik. Ein zentraler Schwerpunkt der Norm liegt auf den Schnittstellenbedingungen zwischen der Ausrüstung und ihrer Umwelt. Die Norm bietet den Designern spezifische Parameter für die Berechnung von R.A.M.S. (Reliability, Availability, Maintainability, Safety) und die Lebensdauer in Bezug auf Umwelteffekte. Dies ist besonders wichtig, da es den Anwendern eine konsistente Beurteilung der Vertragsdokumentation für europäische Projekte ermöglicht und somit zur Einheitlichkeit in der Branche beiträgt. Die definierten Umweltbedingungen werden als normal im Betrieb betrachtet. Dies gewährleistet, dass die Ausrüstung in der Lage ist, unter typischen Bedingungen ordnungsgemäß zu funktionieren. Zudem erkennt die Norm an, dass Mikrokli-ma um bestimmte Komponenten besondere Anforderungen erfordern können, die in den jeweiligen Produktstandards festgelegt werden müssen. Es ist jedoch wichtig zu betonen, dass diese Norm nicht die Prüfanforderungen für die Ausrüstung spezifiziert und auch keine Informationen zur Bestimmung des Sicherheitsrisikos, das mit Umweltbedingungen verbunden ist, bereitstellt. Die Sicherheit von Personen in der Nähe von oder bei Arbeiten an der Signalisierungs- und Telekommunikationsausrüstung wird ebenfalls nicht behandelt. Darüber hinaus sind die Auswirkungen von Vandalismus auf die Ausrüstung nicht Gegenstand dieser Norm. SIST EN 50125-3:2003 gilt für alle Signalisierungs- und Telekommunikationssysteme, mit Ausnahme derjenigen, die für Kräne, Bergbaufahrzeuge und Seilbahnen eingesetzt werden. Die Norm definiert keine Spezifikationen für die onboard Signalisierungs- und Telekommunikationssysteme, welche den Umweltbedingungen für Schienenfahrzeuge (EN 50125-1) unterliegen müssen. Insgesamt verdeutlicht die SIST EN 50125-3:2003 die Bedeutung der Berücksichtigung von Umweltbedingungen bei der Planung und dem Betrieb von Signalisierungs- und Telekommunikationssystemen im Bahnsektor, was ihre Relevanz für die Branche unterstreicht.
SIST EN 50125-3:2003は、鉄道アプリケーションにおける信号およびテレコミュニケーション機器の環境条件を規定した欧州標準であり、その範囲は非常に広範かつ重要です。この標準は、デザインおよび使用に関する指針を提供し、ヨーロッパ内で遭遇する環境条件を特定していますが、供給者と顧客の合意により他の地域でも適用可能です。 この標準の強みは、信号およびテレコミュニケーションシステムに関する装置およびポータブル機器に対し、使用に関連するセクションが定められている点です。これにより、各国のプロジェクトに対して一貫した契約文書の評価が可能となり、設計者がR.A.M.S.（信頼性・可用性・保守性・安全性）や製品のライフタイムを計算する際の環境条件の効果を考慮するためのパラメータを提供します。 さらに、定められた環境条件は通常サービス内で正常と見なされ、装置の周囲を取り巻くマイクロクライメイトに特有の要件が必要な場合もあることが示されています。設計者は、環境条件に関連する安全リスクを特定するための情報はこの標準から得られないため、安全性もこの標準の範囲外とされています。 重要なのは、この欧州標準がすべての信号およびテレコミュニケーションシステムに適用される一方で、クレーンや鉱山車両、ロープウェイなどに使用されるものには適用できない点です。同時に、列車搭載の信号およびテレコミュニケーションシステムについての仕様は定義されず、これらは別途、走行機器の環境条件仕様（EN 50125-1）に従う必要があります。 全体として、SIST EN 50125-3:2003は、信号およびテレコミュニケーションの設備に関連する環境条件を明確に示し、関連業界において非常に重要なリファレンスとなる標準です。
La norme SIST EN 50125-3:2003 se concentre sur les applications ferroviaires, en particulier sur les conditions environnementales pour les équipements de signalisation et de télécommunications. Son champ d'application est bien défini, englobant la conception et l'utilisation des équipements portatifs destinés à ces systèmes, y compris les équipements de test, de mesure et de surveillance. Parmi les forces de cette norme, on note sa capacité à fournir des directives générales qui permettent des évaluations cohérentes de la documentation contractuelle pour les projets européens. Les conditions environnementales qu'elle définit sont considérées comme normales en service, garantissant ainsi que les équipements soient conçus pour fonctionner efficacement dans des environnements variés au sein de l'Europe. De plus, la norme précise les conditions d'interface entre les équipements et leur environnement, ce qui est crucial pour les concepteurs qui doivent évaluer la fiabilité, la disponibilité, la maintenabilité et la sécurité (R.A.M.S.) ainsi que la durée de vie des équipements en fonction des effets des conditions environnementales. Cependant, il est important de noter que cette norme ne traite pas des exigences d'essai pour les équipements, ce qui peut être perçu comme une limitation. Elle n'aborde pas non plus les effets des équipements de signalisation et de télécommunications sur la sécurité globale des systèmes de signalisation, ni les risques associés aux conditions environnementales pour la sécurité des personnes proches des équipements. La norme ne s'applique pas non plus aux systèmes de signalisation et de télécommunications utilisés pour les grues, les véhicules miniers et les téléphériques, ce qui en restreint l'application dans certains contextes. De plus, elle ne définit pas les spécifications pour les systèmes de signalisation et de télécommunications embarqués, qui doivent se conformer à des spécifications distinctes (EN 50125-1) liées aux conditions environnementales des matériels roulants. Dans l'ensemble, malgré certaines limitations, la SIST EN 50125-3:2003 reste une référence importante pour garantir que les équipements de signalisation et de télécommunications respectent des standards de robustesse face aux conditions environnementales variées rencontrées dans le domaine ferroviaire. Sa pertinence est soulignée par son utilisation potentielle au-delà des frontières européennes, sous réserve d'accord entre le fournisseur et le client, ce qui élargit son impact dans le domaine ferroviaire international.
The SIST EN 50125-3:2003 standard provides a comprehensive framework addressing the environmental conditions for equipment used in signalling and telecommunications within the railway sector. Its scope primarily focuses on defining the interface conditions between such equipment and their environments, ensuring designers can adequately calculate Reliability, Availability, Maintainability, and Safety (R.A.M.S.) alongside the expected lifespan of equipment under specific environmental conditions. One of the strengths of this standard lies in its geographical applicability, as it not only specifies environmental conditions encountered throughout Europe but also allows for implementation in other regions through mutual agreement between suppliers and customers. This flexibility enhances the standard's relevance on an international scale, accommodating diverse operational contexts. Another significant aspect of the standard is its emphasis on design guidance, which fosters consistent assessments of contract documentation for European railway projects. This guidance is particularly valuable for ensuring uniformity in the design and deployment of signalling and telecommunications systems, which are critical in enhancing operational safety and efficiency. However, it is essential to acknowledge the limitations of the SIST EN 50125-3:2003 standard. It deliberately excludes specifications for test requirements and the safety implications associated with the environmental conditions on signalling systems. This means that while it lays down foundational guidelines for equipment interaction with environmental factors, designers must seek additional sources for comprehensive safety risk assessments. Furthermore, the standard clarifies that it does not cover certain systems, such as those used in cranes, mining vehicles, and cable cars, nor does it include specifications for train-borne signalling systems, which must adhere to EN 50125-1. This delineation of scope reinforces the focus of the standard on fixed installations rather than mobile applications, making it particularly relevant for static infrastructure within the railway sector. Overall, SIST EN 50125-3:2003 serves as a vital document that guides the design and application of signalling and telecommunications equipment under specified environmental conditions, providing a structured approach for engineers and designers in the railway industry while acknowledging the importance of safety and environmental impact considerations.
SIST EN 50125-3:2003 표준은 유럽 내에서 발걸음하는 환경 조건을 명확히 규명하여 신호 및 통신 시스템의 설계 및 사용에 있어 필수적인 지침을 제공합니다. 이 표준은 특히 신호 및 통신 장비와 휴대용 장비에 적용되며, 장비의 환경과의 인터페이스 조건을 정의하고, R.A.M.S.(신뢰성, 가용성, 유지보수성, 안전성) 및 수명을 환경 조건의 영향을 고려하여 계산할 때 설계자에게 필요한 매개변수를 제공합니다. 이 표준의 강점은 유럽 프로젝트에서 계약 문서에 대한 일관된 평가를 가능하게 하는 일반 지침을 제공하는 점입니다. 정의된 환경 조건은 서비스 중 정상적인 상태로 간주되며, 특정 부품 주변의 미세 기후에 대해서는 제품 표준에 의해 특별한 요구사항을 정의해야 할 수 있다는 점도 인식하고 있습니다. 또한, SIST EN 50125-3:2003은 크레인, 광산 차량, 케이블카에 사용되는 신호 및 통신 시스템은 제외하며, 기차 탑재 신호 및 통신 시스템의 사양은 기차 자산 환경 조건 사양(EN 50125-1)을 준수해야 한다고 명시합니다. 이처럼, 표준은 모든 신호 및 통신 시스템에 적용되지만, 특정 범위와 이를 넘어서는 안전 위험에 대한 정보는 제공하지 않으며, 사용자 또는 주변 인원의 안전 또한 본 표준의 범위에 포함되지 않습니다. 이 표준은 환경 조건을 효과적으로 관리하고 장비 설계 및 운용 시 필요한 인프라를 확보하는 데 매우 중요한 역할을 하며, 유럽 내에서 신호 및 통신 시스템의 신뢰성과 안정성을 높이는 데 기여합니다.
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...