oSIST prEN 14363-2:2025

SLOVENSKI STANDARD
01-september-2025
Železniške naprave - Preskušanje in simulacija za oceno voznih lastnosti
železniških vozil, ki obratujejo na omrežju težkih železniških prog - 2. del: Varnost
pred iztirjenjem na zasukanih tirih
Railway applications - Testing and simulation for the acceptance of running
characteristics of railway vehicles operated on the heavy rail network - Part 2: Safety
against derailment on twisted track
Bahnanwendungen - Prüfungen und Simulationen für die Bewertung der fahrtechnischen
Eigenschaften von Schienenfahrzeugen, die auf dem Vollbahnnetz betrieben werden -
Teil 2: Sicherheit gegen Entgleisen in Gleisverwindungen
Applications ferroviaires - Essais en vue de l'évaluation du comportement dynamique
des véhicules ferroviaires circulant sur un réseau du système ferroviaire lourd - Partie 2:
Aptitude au franchissement des gauches de voie, sans déraillement
Ta slovenski standard je istoveten z: prEN 14363-2
ICS:
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2025
ICS Will supersede EN 14363:2016+A2:2022
English Version
Railway applications - Testing and simulation for the
acceptance of running characteristics of railway vehicles
operated on the heavy rail network - Part 2: Safety against
derailment on twisted track
Applications ferroviaires ¿ Essais en vue de l'évaluation Bahnanwendungen - Versuche und Simulationen für
du comportement dynamique des véhicules die Bewertung der fahrtechnischen Eigenschaften von
ferroviaires circulant sur un réseau du système Schienenfahrzeugen, die auf dem Vollbahnnetz
ferroviaire lourd ¿ Partie 2: Aptitude au betrieben werden - Teil 2: Sicherheit gegen Entgleisen
franchissement des gauches de voie, sans déraillement in Gleisverwindungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 256.
If this draft becomes a European Standard, CEN 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 CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, 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.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14363-2:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Safety against derailment on twisted tracks . 7
4.1 General. 7
4.2 Signal processing . 8
4.3 Rail test conditions . 8
4.4 Vehicle test conditions . 9
4.4.1 General. 9
4.4.2 Loading conditions . 10
4.4.3 Conditions for vehicles with air springs . 10
4.4.4 Conditions for bogie vehicles with more than two axles per bogie . 10
4.4.5 Conditions for articulated vehicles . 10
4.4.6 Conditions for vehicles with more than two suspension levels . 10
4.4.7 Conditions for vehicles with steered or self-steering wheelsets . 10
4.4.8 Possible simplification for certain carbody/bogie interface . 11
4.5 Test methods . 12
4.5.1 Test method 1: Test on twisted test track . 12
4.5.2 Test method 2: Test on twist test rig and flat test track . 18
4.5.3 Test method 3: Test on twist test rig and yaw test rig . 23
5 Evaluation of the torsional coefficient of a vehicle body . 27
Annex A (informative) Information on safety against derailment . 28
A.1 Factors influencing the safety against derailment of vehicles running on twisted
track . 28
A.1.1 General. 28
A.1.2 Wheel unloading influences . 28
A.1.3 Guiding force influences . 28
A.2 Evaluation and limit value for safety against derailment . 29
A.3 Friction conditions during testing on special track . 31
A.4 Special conditions for vehicles with air springs . 32
A.4.1 General. 32
A.4.2 4-point levelling systems . 33
A.4.3 3-point levelling system with longitudinal connection . 33
A.4.4 2-point levelling systems . 33
A.5 Test twist conditions for articulated vehicles . 34
A.6 Test twist conditions for vehicles with more than two suspension levels . 41
A.7 Calculation of the shim sizes (test method 1) . 42
A.8 Performing and evaluating a twist test for a two-axle vehicle (test method 2) . 43
A.8.1 General. 43
A.8.2 Required test rig . 43
A.8.3 Performing the twist test . 44
A.8.4 Evaluation of twist diagrams . 44
A.9 Performing and evaluation of a twist test for a vehicle with two bogies with two
axles (test method 2) . 46
A.9.1 General . 46
A.9.2 Required test rig . 46
A.9.3 Performing and evaluating a combined body and bogie twist test (test method 2,
variant 1) . 47
A.9.4 Performing separate twist tests on bogie centre distance and bogie wheel base (test
method 2, variant 2) . 50
Annex B (informative) Tests for determination of the torsional coefficient of a vehicle body . 55
B.1 Force-deflection measurement directly at the vehicle body . 55
B.2 Force-deflection measurement at the contact points between wheel and rail after
blocking of the suspension(s) between wheelset (bogie frame) and vehicle body . 56
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive (EU) 2016/797 aimed to be covered . 57
Bibliography . 59

European foreword
This document (prEN 14363-2:2025) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document together with prEN 14363-1:2025, prEN 14363-3:2025, prEN 14363-4:2025 and
prEN 14363 5:2025, will supersede EN 14363:2016+A2:2022.
The EN 14363 Series “Railway applications — Testing and Simulation for the assessment of running
characteristics of rail vehicles operated on the heavy rail network” consists of the following parts:
— prEN 14363-1:2025, General;
— prEN 14363-2:2025, Safety against derailment on twisted track;
— prEN 14363-3:2025, Stationary tests that are not obligatory on European level;
— prEN 14363-4:2025, On-track testing;
— prEN 14363-5:2025, Simulations/calculations;
— prCEN/TR 14363-6:2025, Technical Report providing background information to the EN 14363 series
of standards (under development).
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Introduction
General information for the application of this document is given in prEN 14363-1:2025.
1 Scope
This document applies to all railway vehicles including OTM’s and Road-rail machines, which are
operated on the heavy rail network with standard track gauge 1 435°mm and nominal static vertical
wheelset forces up to 350 kN.
This document may also be applicable (partly or in full) to:
— rail systems with different track layout, e. g. urban rail systems and/or;
— rail systems with other than 1 435 mm nominal track gauge and/or;
— non-public rail networks and vehicles, e. g. mine rail systems.
NOTE For rail systems other than 1 435 mm track gauge or urban rail systems,
...