National foreword

This British Standard is the UK implementation of EN 50736:2025.

The UK participation in its preparation was entrusted to Technical Committee GEL/9/1, Railway Electrotechnical Applications - Signalling and communications.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2025.

This European Standard was approved by CENELEC on 10 November 2025. 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, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

European foreword

This document (EN 50736:2025) has been prepared by CLC/SC 9XA “Communication, signalling and processing systems” of CLC/TC 9X “Electrical and electronic applications for railways”.

The following dates are fixed:

This document has been prepared according to Decision 57/5 taken during the SC 9XA meeting.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Any feedback and questions on this document should be directed to the users’ national committee. A complete listing of these bodies can be found on the CENELEC website.

Introduction

The environmental conditions for signalling and telecommunication equipment are specified by EN 50125‑3:2003, without defining test requirements and their related performance/acceptance criteria.

This document contains test requirements and performance/acceptance criteria for most of the mentioned environmental conditions likely to be experienced in the railway applications and published in EN 50125‑3:2003. Furthermore, it clearly indicates for which environmental conditions no test methods are known and therefore no meaningful test requirements can be defined.

Test requirements for the type test defined in this document consider the severity of the environmental parameters provided for by EN 50125‑3:2003, but those test requirements remain applicable even if the severity levels requested by the customer differ.

This document has been prepared in the form of a Product Standard.

Where possible, direct references are given to other existing standards to obtain a high degree of acceptance and to reduce additional effort for testing.

1 Scope

This document applies to railway signalling and telecommunication trackside equipment.

This document does not cover signalling and telecommunication equipment mounted in vehicles; these are covered by EN 50155:2021.

This document covers the type testing phases of the equipment for signal and telecommunication (S&T) systems (including power supply systems belonging to S&T), in order to ensure compliance with specified requirements already defined in the customer specifications or by the involved parties.

In particular this document intends to define test requirements with related performance / acceptance criteria, considering only the environmental conditions stated by the EN 50125‑3:2003, and considering the severities of the environmental parameters herein defined.

Safety considerations are not covered by this document.

2 Normative references

3 Terms, definitions and abbreviations

3.1 Terms and definitions

3.2 Abbreviations

4 Relation between environmental conditions and test requirements

5 Test requirements for type test

5.1 General test requirements

5.2 Insulation tests

5.3 Temperature tests

5.4 Humidity test

5.5 Vibration and shock tests

5.6 Electromagnetic compatibility tests

5.7 Surge test

5.8 Test for protection against water ingress

5.9 Solar radiation tests

5.10 Test for protection against dust and sand ingress

5.11 Test for protection against external mechanical impacts

6 Documentation

6.1 General

6.2 Type test specification

6.3 Type test report

6.4 Type test compliance summary sheet

Bibliography

BS EN 50736:2025

Railway application — Communication, signalling and processing system — Test requirements for signalling and telecommunication equipment

Current

Published:

31 Dec 2025