FprEN 50121-4
(Main)Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus
Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus
This European Standard applies to signalling and telecommunication apparatus that is installed inside the railway environment. Signalling and telecommunication apparatus mounted in vehicles is covered by EN 50121-3-2:2016, signalling and telecommunication apparatus installed inside the substation and connected to substation equipment is covered by EN 50121-5:2016. This European Standard specifies limits for emission and immunity and provides performance criteria for signalling and telecommunications (S&T) apparatus (including power supply systems belonging to S&T) which may interfere with other apparatus inside the railway environment, or increase the total emissions for the railway environment and so risk causing Electro-Magnetic Interference (EMI) to apparatus outside the railway system. The requirements specified in this standard apply for: — vital equipment such as interlocking or command and control; — apparatus inside the 3 m zone; — ports of apparatus inside the 10 m zone with connection inside the 3 m zone; — ports of apparatus inside the 10 m zone with cable length > 30 m. Other apparatus not covered by at least one of these given cases should be in compliance with EN 61000-6-2. If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators, e.g. transponder systems), then the radiated emission requirement in this standard are not intended to be applicable to the intentional transmission from a radio-transmitter as defined by the ITU. Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC related standard for radio equipment. The standard does not specify basic personal safety requirements for apparatus such as protection against electric shock, unsafe operation, insulation co-ordination and related dielectric tests. The requirements were developed for and are applicable to this set of apparatus when operating under normal conditions. Fault conditions of the apparatus have not been taken into account. The frequency range considered is from DC to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified. For products in the scope of EN 61000-3-2, EN 61000-3-3, EN 61000-3-11 or EN 61000-3-12 the requirements of those standards also apply. These specific provisions are to be used in conjunction with the general provisions in EN 50121-1:2016. The immunity and emission levels do not of themselves guarantee that the integration of apparatus will necessarily be satisfactory. The standard cannot cover all the possible configurations of the apparatus, but the test levels are sufficient to achieve satisfactory EMC in the majority of cases.
Bahnanwendungen - Elektromagnetische Verträglichkeit - Teil 4: Störaussendungen und Störfestigkeit von Signal- und Telekommunikationseinrichtungen
Applications ferroviaires - Compatibilité électromagnétique - Partie 4: Emission et immunité des appareils de signalisation et de télécommunication
Železniške naprave - Elektromagnetna združljivost - 4. del: Sevanje in odpornost signalnih in telekomunikacijskih naprav
General Information
Relations
Overview
FprEN 50121-4 - Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus - is a CLC/CENELEC product standard that defines EMC requirements for signalling and telecommunication (S&T) equipment installed inside the railway environment. It specifies emission limits and immunity test levels for ports and enclosures of S&T apparatus to reduce the risk of electromagnetic interference (EMI) within and from the railway system. The frequency range covered is DC to 400 GHz. Safety (electric shock, insulation coordination) and fault-condition behaviour are outside the scope.
Key topics and technical requirements
- Scope & zones: Requirements apply to vital equipment (interlocking, command & control), apparatus inside the 3 m zone, ports of apparatus inside the 10 m zone that connect inside the 3 m zone, and ports in the 10 m zone with cable length > 30 m. Other apparatus should comply with EN 61000-6-2.
- Port-based approach: Emission and immunity tests are specified port-by-port (AC/DC power ports, I/O ports, earth, enclosure ports). Measurements must be reproducible and performed under defined test set-ups.
- Emission limits: Radiated emissions for enclosure ports reference EN IEC 61000-6-4. Conducted emission limits for AC/DC power ports follow basic CISPR/EN methods (e.g., EN 55016-2-1) and are detailed per port.
- Immunity testing: Immunity test methods reference the EN/IEC 61000‑4 series (EFT, surge, ESD, radiated RF, conducted RF, power-frequency magnetic field, etc.).
- Performance criteria: Three performance criteria (A, B, C) define acceptable degradation and recovery behavior during or after immunity tests:
- A: continuous operation within acceptable degradation,
- B: temporary degradation but full recovery after the test,
- C: loss of function allowed if self‑recoverable or user-restorable (no loss of critical stored data).
- Exclusions: Intentional radio transmitters (e.g., transponders) are not covered for radiated emission requirements; exclusion bands from radio-EMC standards apply.
Applications and who uses it
- Equipment manufacturers of signalling and telecommunications hardware use EN 50121-4 to design and test products for railway EMC compliance.
- System integrators and railway operators use the standard to assess compatibility when integrating S&T apparatus into wayside installations.
- EMC test laboratories and notified bodies rely on the referenced test methods to verify emission and immunity performance.
- Practical benefits: reduces on-site EMI risk, helps achieve predictable integration of S&T apparatus, and supports regulatory compliance for railway EMC.
Related standards
- EN 50121-1 (General provisions for railway EMC)
- EN 50121-3-2 (Rolling stock - onboard S&T apparatus)
- EN 50121-5 (Substation-connected S&T apparatus)
- EN IEC 61000-6-4 (Industrial emission standard)
- EN/IEC 61000‑4 series and EN 55016-2-1 (EMC test methods)
Keywords: EN 50121-4, electromagnetic compatibility, railway signalling, telecommunications apparatus, EMC testing, EMI, immunity and emission limits, 3 m zone, 10 m zone.
Frequently Asked Questions
FprEN 50121-4 is a draft published by CLC. Its full title is "Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus". This standard covers: This European Standard applies to signalling and telecommunication apparatus that is installed inside the railway environment. Signalling and telecommunication apparatus mounted in vehicles is covered by EN 50121-3-2:2016, signalling and telecommunication apparatus installed inside the substation and connected to substation equipment is covered by EN 50121-5:2016. This European Standard specifies limits for emission and immunity and provides performance criteria for signalling and telecommunications (S&T) apparatus (including power supply systems belonging to S&T) which may interfere with other apparatus inside the railway environment, or increase the total emissions for the railway environment and so risk causing Electro-Magnetic Interference (EMI) to apparatus outside the railway system. The requirements specified in this standard apply for: — vital equipment such as interlocking or command and control; — apparatus inside the 3 m zone; — ports of apparatus inside the 10 m zone with connection inside the 3 m zone; — ports of apparatus inside the 10 m zone with cable length > 30 m. Other apparatus not covered by at least one of these given cases should be in compliance with EN 61000-6-2. If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators, e.g. transponder systems), then the radiated emission requirement in this standard are not intended to be applicable to the intentional transmission from a radio-transmitter as defined by the ITU. Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC related standard for radio equipment. The standard does not specify basic personal safety requirements for apparatus such as protection against electric shock, unsafe operation, insulation co-ordination and related dielectric tests. The requirements were developed for and are applicable to this set of apparatus when operating under normal conditions. Fault conditions of the apparatus have not been taken into account. The frequency range considered is from DC to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified. For products in the scope of EN 61000-3-2, EN 61000-3-3, EN 61000-3-11 or EN 61000-3-12 the requirements of those standards also apply. These specific provisions are to be used in conjunction with the general provisions in EN 50121-1:2016. The immunity and emission levels do not of themselves guarantee that the integration of apparatus will necessarily be satisfactory. The standard cannot cover all the possible configurations of the apparatus, but the test levels are sufficient to achieve satisfactory EMC in the majority of cases.
This European Standard applies to signalling and telecommunication apparatus that is installed inside the railway environment. Signalling and telecommunication apparatus mounted in vehicles is covered by EN 50121-3-2:2016, signalling and telecommunication apparatus installed inside the substation and connected to substation equipment is covered by EN 50121-5:2016. This European Standard specifies limits for emission and immunity and provides performance criteria for signalling and telecommunications (S&T) apparatus (including power supply systems belonging to S&T) which may interfere with other apparatus inside the railway environment, or increase the total emissions for the railway environment and so risk causing Electro-Magnetic Interference (EMI) to apparatus outside the railway system. The requirements specified in this standard apply for: — vital equipment such as interlocking or command and control; — apparatus inside the 3 m zone; — ports of apparatus inside the 10 m zone with connection inside the 3 m zone; — ports of apparatus inside the 10 m zone with cable length > 30 m. Other apparatus not covered by at least one of these given cases should be in compliance with EN 61000-6-2. If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators, e.g. transponder systems), then the radiated emission requirement in this standard are not intended to be applicable to the intentional transmission from a radio-transmitter as defined by the ITU. Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC related standard for radio equipment. The standard does not specify basic personal safety requirements for apparatus such as protection against electric shock, unsafe operation, insulation co-ordination and related dielectric tests. The requirements were developed for and are applicable to this set of apparatus when operating under normal conditions. Fault conditions of the apparatus have not been taken into account. The frequency range considered is from DC to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified. For products in the scope of EN 61000-3-2, EN 61000-3-3, EN 61000-3-11 or EN 61000-3-12 the requirements of those standards also apply. These specific provisions are to be used in conjunction with the general provisions in EN 50121-1:2016. The immunity and emission levels do not of themselves guarantee that the integration of apparatus will necessarily be satisfactory. The standard cannot cover all the possible configurations of the apparatus, but the test levels are sufficient to achieve satisfactory EMC in the majority of cases.
FprEN 50121-4 is classified under the following ICS (International Classification for Standards) categories: 29.280 - Electric traction equipment; 33.100.01 - Electromagnetic compatibility in general; 45.020 - Railway engineering in general. The ICS classification helps identify the subject area and facilitates finding related standards.
FprEN 50121-4 has the following relationships with other standards: It is inter standard links to EN 50121-4:2016/A1:2019, EN 50121-4:2016. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
FprEN 50121-4 is associated with the following European legislation: EU Directives/Regulations: 2014/30/EU; Standardization Mandates: M/552. 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 FprEN 50121-4 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 CLC standards.
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 50121-4:2021
01-julij-2021
Železniške naprave - Elektromagnetna združljivost - 4. del: Sevanje in odpornost
signalnih in telekomunikacijskih naprav
Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of
the signalling and telecommunications apparatus
Bahnanwendungen - Elektromagnetische Verträglichkeit - Teil 4: Störaussendungen und
Störfestigkeit von Signal- und Telekommunikationseinrichtungen
Applications ferroviaires - Compatibilité électromagnétique - Partie 4: Emission et
immunité des appareils de signalisation et de télécommunication
Ta slovenski standard je istoveten z: prEN 50121-4:2021
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
45.020 Železniška tehnika na Railway engineering in
splošno general
oSIST prEN 50121-4:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 50121-4:2021
oSIST prEN 50121-4:2021
EUROPEAN STANDARD DRAFT
prEN 50121-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS Will supersede EN 50121-4:2016 and all of its
amendments and corrigenda (if any)
English Version
Railway applications - Electromagnetic compatibility - Part 4:
Emission and immunity of the signalling and telecommunications
apparatus
Applications ferroviaires - Compatibilité électromagnétique - Bahnanwendungen - Elektromagnetische Verträglichkeit -
Partie 4: Emission et immunité des appareils de Teil 4: Störaussendungen und Störfestigkeit von Signal-
signalisation et de télécommunication und Telekommunikationseinrichtungen
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-10-15.
It has been drawn up by CLC/TC 9X.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 73231 Ref. No. prEN 50121-4:2021 E
oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
Contents
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and abbreviations . 6
4 Description of location . 7
5 Emission limits for apparatus . 7
6 Immunity . 9
Annex ZZ (informative) Relationship between this European standard and the essential
requirements of Directive 2014/30/EU [2014 OJ L96] aimed to be covered . 17
Bibliography . 18
oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
European foreword
This document (prEN 50121-4:2021) has been prepared by CLC/TC 9X “Electrical and electronic
applications for railways”.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
This document will supersede EN 50121-4:2016 and all of its amendments and corrigenda (if any).
prEN 50121-4:2021 includes the following significant technical changes with respect to
EN 50121-4:2016:
— clarification of scope (Clause 1);
— set dated normative references (Clause 2);
— Update of Clause 5;
— Introduction of performance criteria (Clause 6.1);
— Update of Clause 6.2, paragraph from Clause 1 was introduced;
— revision of Annex ZZ.
This European Standard is read in conjunction with EN 50121-1.
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 the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
document.
This standard forms Part 4 of the European Standard series EN 50121, published under the general
title “Railway applications - Electromagnetic compatibility”. The series consists of:
— Part 1: General;
— Part 2: Emission of the whole railway system to the outside world;
— Part 3-1: Rolling stock – Train and complete vehicle;
— Part 3-2: Rolling stock – Apparatus;
— Part 4: Emission and immunity of the signalling and telecommunications apparatus;
— Part 5: Emission and immunity of fixed power supply installations and apparatus.
oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
Introduction
This document has been prepared in the form of a Product Standard.
It defines the immunity and emission test requirements for apparatus defined in the scope in relation to
the electromagnetic disturbances likely to be experienced in the railway. In particular, the test
requirements represent the essential electromagnetic immunity requirements and have been selected
to ensure an adequate level of immunity for apparatus installed on the railway locations.
Test requirements are specified for each port considered.
Safety considerations are not covered by this document.
In specific situations, where the level of disturbances may exceed the levels considered in this
standard, e.g. at a special location or where a hand-held transmitter is used in very close proximity to
an apparatus, special mitigation measures may have to be employed.
oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
1 Scope
This document applies to railway signalling and telecommunication apparatus. Signalling and
telecommunication apparatus mounted in vehicles is covered by prEN 50121-3-2:2021, signalling and
telecommunication apparatus installed inside the substation and connected to substation equipment is
covered by prEN 50121-5:2021.
This document specifies limits for emission and immunity and provides performance criteria for
signalling and telecommunications (S&T) apparatus (including power supply systems belonging to
S&T) which may interfere with other apparatus inside the railway environment, or increase the total
emissions for the railway environment and so risk causing Electro-Magnetic Interference (EMI) to
apparatus outside the railway system.
The document does not specify basic personal safety requirements for apparatus such as protection
against electric shock, unsafe operation, insulation co-ordination and related dielectric tests. The
requirements were developed for and are applicable to this set of apparatus when operating under
normal conditions. Fault conditions of the apparatus have not been taken into account.
The frequency range considered is from DC to 400 GHz. No measurements need to be performed at
frequencies where no requirement is specified.
For products in the scope of EN 61000-3-2, EN 61000-3-3, EN 61000-3-11 or EN 61000-3-12 the
requirements of those document also apply.
These specific provisions are to be used in conjunction with the general provisions in
EN 50121-1:2016.
The immunity and emission levels do not of themselves guarantee that the integration of apparatus will
necessarily be satisfactory. The document cannot cover all the possible configurations of the
apparatus, but the test levels are sufficient to achieve satisfactory EMC in the majority of cases.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 50121-1:2017, Railway applications - Electromagnetic compatibility - Part 1: General
EN 55016-2-1:2014, Specification for radio disturbance and immunity measuring apparatus and
methods - Part 2-1: Methods of measurement of disturbances and immunity - Conducted disturbance
measurements
EN 61000-4-2:2009, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity test
EN 61000-4-3:2006, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency, electromagnetic field immunity test
EN 61000-4-4:2012, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test
EN 61000-4-5:2014, Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement
techniques - Surge immunity test
EN 61000-4-6:2014, Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement
techniques - Immunity to conducted disturbances, induced by radio-frequency fields
EN 61000-4-8:2010, Electromagnetic compatibility (EMC) - Part 4-8: Testing and measurement
techniques - Power frequency magnetic field immunity test
oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
EN IEC 61000-6-4:2019, Electromagnetic compatibility (EMC) - Part 6-4: Generic standards - Emission
standard for industrial environments
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1.1
port
particular interface of the specified apparatus with the external environment
EXAMPLE AC power port, DC power port, I/O (input/output) port, earth port.
[SOURCE: IEC 60050-821: CDV2015, 821-11-36]
3.1.2
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or impinge
Enclosure port
AC power port I/O port
DC power port APPARATUS earth port
Figure 1 — Main categories of ports
3.1.3
3 m zone
area along the railway line within a distance of 3 m from the centreline of the nearest track at both
sides of the track
3.1.4
10 m zone
area along the railway line within a distance of 10 m from the centreline of the nearest track at both
sides of the track
oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
3.2 Abbreviations
AC Alternating current
AM Amplitude modulation
DC Direct current
EMC Electromagnetic compatibility
EMI Electromagnetic interference
I/O Input / Output
ITU International Telegraph Union
S&T Signalling and telecommunication
4 Description of location
The railway environment is characterized as described in EN 50121-1:2017.
5 Emission limits for apparatus
The emission tests and limits for apparatus covered by this standard are given on a port by port basis.
Measurements shall be performed in well-defined and reproducible conditions for each type of
disturbance.
The radiated emission limits defined for enclosure port in EN IEC 61000-6-4:2019, Table 3 shall be
complied with. The description of the test, the test methods and the test set-up are given in Basic
Standards which are referred to in EN IEC 61000-6-4.
The description of the conducted emission tests, the test methods and the test set-up are given in
Basic Standards which are referred to in Table 1.
The conducted emission limits shall apply to both AC and DC power ports. Where the apparatus is
intended to be used in an environment other than the railway environment, then the emission limits
given in the appropriate standards shall apply.
oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
Table 1 — Emission — AC or DC power ports (input and output)
Test Basic Test Applicability
Port Remarks
specification Standard set-up note
a
1.1 AC or DC power 150 kHz to 79 dBμV qu
...
The FprEN 50121-4 standard addresses crucial aspects of electromagnetic compatibility (EMC) specifically related to signalling and telecommunications apparatus in the railway environment. Its comprehensive scope ensures that it effectively covers the emission and immunity characteristics of equipment, thereby minimizing the risk of electromagnetic interference (EMI) that could affect adjacent systems. One of the primary strengths of this standard is its delineation of applicable apparatus categories. By specifying limits for vital equipment, such as interlocking systems, and providing guidelines for apparatus within defined proximity zones (3 m and 10 m), the standard facilitates the development of reliable and compliant signalling and telecommunications systems. This clearly defined framework is essential for maintaining operational integrity and safety in railway operations. The standard further emphasizes an important aspect of EMC by detailing that apparatus intended for radio communication is excluded from certain emission requirements. This nuance recognizes the functional intricacies of communication systems, ensuring that essential radiated emissions from intentional transmitters are appropriately governed under the frameworks designed by the International Telecommunication Union (ITU). Another relevant aspect of FprEN 50121-4 is its specification of the operational frequency range from DC to 400 GHz, which encompasses a wide array of potential applications and technologies. This broad frequency coverage reinforces the standard's applicability across various types of signalling and telecommunication equipment used in modern railway systems. While the standard does not address personal safety requirements or fault conditions, its focus on normal operational parameters is essential in establishing baseline EMC performance criteria. The emphasis on developing satisfactory integration in most configurations, despite recognizing that it cannot cover every possible scenario, reflects a pragmatic approach to standardization in complex environments like railways. Overall, FprEN 50121-4 serves as a vital resource for ensuring that signalling and telecommunications apparatus meet necessary EMC standards, thereby enhancing the safety and efficiency of railway operations. Its well-structured criteria and strategic exclusions make it relevant in guiding both manufacturers and operators towards achieving compliance and operational excellence in the demanding context of railway systems.
FprEN 50121-4 표준은 철도 환경 내에 설치된 신호 및 통신 장치에 대한 전자기 호환성(EMC)을 다루며, 신호 및 통신 장치가 타 장치와의 간섭을 최소화하고, 전체적인 배출량을 관리하기 위해 필요한 성능 기준과 제한을 명시하고 있습니다. 이 표준은 특히 차세대 철도 시스템의 신뢰성과 안전성을 보장하는 데 중요한 역할을 하며, 다양한 신호 및 통신 장비가 상호작용하고 조화를 이루도록 설계되었습니다. 이 표준의 강점 중 하나는 차량에 장착된 신호 및 통신 장치는 EN 50121-3-2:2016에 의해 규제되고, 변전소에 설치된 장치는 EN 50121-5:2016로 관리되어 보다 구체적이고 명확한 규제 체계를 제공한다는 점입니다. 이러한 체계는 각 장비 간의 전자기 간섭 가능성을 줄이고, 전반적인 전자기 수용성을 향상시키는 데 기여합니다. FprEN 50121-4는 신호 및 통신 장비가 발생할 수 있는 전자기 방출 및 면역성의 한계를 설정하여, 철도 시스템 내에서의 전자기 간섭(EMI)을 방지합니다. 이 표준은 3m 구역 내 필수 장비에 대한 요구 사항을 규정하고 있으며, 10m 구역 내 포트에 대해서도 구체적인 규정을 두고 있어 고도화된 안전성을 보장합니다. 이는 기술적 안전성뿐만 아니라 철도 운영 효율성을 극대화하는 데 중요한 요소입니다. 또한, 저주파에서부터 400GHz까지의 주파수를 고려하여 폭넓은 기술적 요구 사항을 반영하고, 특정 주파수에서 요구 사항이 없는 경우 측정을 수행할 필요가 없다는 점도 실용적인 장점으로 작용합니다. 하지만 이 표준은 모든 조합을 포괄할 수는 없으며, 일반적으로 기대되는 전자기 호환성을 달성하기 위한 적절한 시험 수준을 설정하고 있습니다. 그러므로 FprEN 50121-4 표준은 철도 분야에서 필수적으로 요구되는 신호 및 통신 장치의 전자기 호환성을 확보하는 데 중요한 역할을 하며, 철도 시스템의 통합 및 운영에 긍정적인 영향을 미치는 중요한 기준으로 자리잡고 있습니다.
FprEN 50121-4は、鉄道用途における電磁両立性に関する重要な規格であり、特に信号および通信機器に重点が置かれています。この規格は、鉄道環境内に設置された信号および通信機器に適用され、EMC（電磁両立性）の発展に寄与しています。範囲は、重要な機器や一定のゾーンにおける機器、電源システムを含む様々な装置にわたっており、特に3メートルおよび10メートルゾーン内の装置に対する要求を細かく示しています。 この標準の強みは、鉄道システム内での他の機器に干渉を引き起こす可能性を減少させるための排出限度および耐性基準を明確に設定している点です。電磁干渉（EMI）のリスクを管理する上で、非常に重要な役割を果たしており、特に鉄道安全の観点から信号機器が他の装置に与える影響を最小限に抑えることを目指しています。また、運用条件下での機器の性能基準を提供し、正常動作が前提であることが示されています。 この標準は、技術的な要件や性能基準を提供することにより、特に重要なインターロッキングや指令・制御装置のような必須装置の試験でも高い有用性を示しています。しかし、故障状態についての考慮がなされていないため、設置および運用に際しては別途注意が必要です。 電磁両立性において、FprEN 50121-4は、鉄道環境内での信号および通信機器が直面する課題に対して、包括的かつ専門的な解決策を提供しているため、関連する技術者や業界関係者にとって非常に有用な指針となります。全体として、この標準は鉄道分野における技術的な整合性を確保するための重要な文書であり、持続可能な開発と安全性の両面から大変意義深いものです。
La norme FprEN 50121-4, intitulée "Applications ferroviaires - Compatibilité électromagnétique - Partie 4 : Émission et immunité des appareils de signalisation et de télécommunication", revêt une importance cruciale dans le domaine des applications ferroviaires, en particulier pour l'équipement de signalisation et de télécommunication installé dans l'environnement ferroviaire. Son champ d'application est clairement défini, s'appliquant aux appareils qui peuvent potentiellement interférer avec d'autres équipements dans cet environnement spécifique, ce qui en fait un atout majeur pour garantir la compatibilité électromagnétique (CEM). Les points forts de cette norme résident dans sa capacité à spécifier des limites d'émission et d'immunité, fournissant ainsi des critères de performance qui sont cruciaux pour le fonctionnement sûr et efficace des systèmes de signalisation et de télécommunication (S&T). La norme aborde également les cas particuliers tels que les équipements vitaux, les appareils situés dans la zone de 3 mètres, et ceux ayant des ports dans des zones avec des connexions spécifiques, renforçant ainsi la gardabilité contre les interférences électromagnétiques (EMI). La pertinence de la norme FprEN 50121-4 se manifeste dans sa capacité à intégrer des exigences de CEM dans un cadre européen, apportant de la clarté et de la standardisation dans un secteur où la sécurité et la fonctionnalité sont primordiales. En abordant un large éventail de fréquences, allant de DC à 400 GHz, la norme assure que les appareils répondent à des exigences rigoureuses mais réalisables, bien que sa portée n'inclut pas toutes les configurations possibles d'équipements. De plus, bien que la norme ne couvre pas les exigences de sécurité personnelle de base, elle reste essentielle pour établir des standards de performance dans des conditions normales de fonctionnement, ce qui est fondamental pour la sécurité des opérations ferroviaires. Sa complémentarité avec d'autres normes, telles que l'EN 61000-6-2, et son interaction avec les dispositions générales de l'EN 50121-1:2016, confèrent à cette norme une valeur ajoutée dans le cadre global des réglementations de CEM. En résumé, la norme FprEN 50121-4 est un document clé pour les acteurs du secteur ferroviaire, renforçant la compatibilité électromagnétique des installations de signalisation et de télécommunication, et facilitant une intégration sécurisée et efficace de ces technologies dans l'environnement ferroviaire.
Die Norm FprEN 50121-4 behandelt die elektromagnetische Verträglichkeit (EMV) von Signalisierungs- und Telekommunikationsanlagen im Eisenbahnumfeld. Diese europäische Norm legt spezifische Grenzwerte für Emissionen und Immunität fest und definiert Leistungsanforderungen für Signalisierungs- und Telekommunikationsgeräte (S&T), einschließlich der zugehörigen Stromversorgungssysteme. Ein besonderes Augenmerk liegt auf der potenziellen elektromagnetischen Störung (EMI), die sowohl andere Geräte im Eisenbahnumfeld als auch externe Apparate gefährden könnte. Der Anwendungsbereich der Norm ist klar abgesteckt. Er umfasst kritische Komponenten wie die Gleisverriegelung oder Leit- und Steueranlagen sowie Apparate innerhalb von definierten Zonen (3-Meter- und 10-Meter-Zonen). Dies zeigt die Relevanz der Norm für sicherheitskritische Anwendungen im Bahnsektor, in denen bereits kleine Störungen gravierende Folgen haben können. Darüber hinaus sind die Anforderungen an Apparate, die verschiedene Kommunikationsports besitzen, klar umrissen, was die Integration und den Betrieb dieser Systeme erleichtert. Ein herausragendes Merkmal dieser Norm ist, dass sie nicht nur allgemeine EMV-Vorschriften bietet, sondern auch spezifische Anforderungen für den Frequenzbereich von DC bis 400 GHz festlegt. Dies stellt sicher, dass auch hochfrequente Anwendungen abgedeckt werden, was der technologischen Entwicklung in der Bahnbranche Rechnung trägt. Dadurch wird eine angemessene Förderung der elektromagnetischen Verträglichkeit in der Mehrheit der Betriebsbedingungen gewährleistet. Stark zu betonen ist auch die praktische Anwendbarkeit der Norm – die Festlegung von Immunitäts- und Emissionslevels könnte nicht nur theoretisch, sondern in der Praxis zur Sicherstellung einer zufriedenstellenden EMV genutzt werden. Auch wenn die Norm nicht alle möglichen Konfigurationen von Apparaten abdecken kann, so bietet sie dennoch genügend Flexibilität und Leistungskriterien, um die meisten Konstellationen im Eisenbahnbereich zu unterstützen. Die Norm FprEN 50121-4 stellt somit einen wichtigen Leitfaden zur Erreichung der elektromagnetischen Verträglichkeit von Signalisierungs- und Telekommunikationsanlagen dar und ist von wesentlicher Bedeutung für Hersteller und Betreiber im Eisenbahnbereich. Die klare Strukturierung und pragmatische Herangehensweise an EMV-Anforderungen unterstreichen ihre Bedeutung und Relevanz in der Branche.
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