SIST EN ISO 24478:2024

SLOVENSKI STANDARD
01-oktober-2024
Železniške naprave - Zavore - Slovar (ISO 24478:2023, vključuje popravek 2024-04)
Railway applications - Braking - General vocabulary (ISO 24478:2023, including
corrected version 2024-04)
Bahnanwendungen - Bremsen - Fachbegriffe (ISO 24478:2023, korrigierte Fassung
2024-04)
Applications ferroviaires - Freinage - Vocabulaire général (ISO 24478:2023, y compris
version corrigée 2024-04)
Ta slovenski standard je istoveten z: EN ISO 24478:2024
ICS:
01.040.45 Železniška tehnika (Slovarji) Railway engineering
(Vocabularies)
45.040 Materiali in deli za železniško Materials and components
tehniko for railway engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 24478
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2024
EUROPÄISCHE NORM
ICS 45.020; 01.040.45 Supersedes EN 14478:2017
English Version
Railway applications - Braking - General vocabulary (ISO
24478:2023, including corrected version 2024-04)
Applications ferroviaires - Freinage - Vocabulaire Bahnanwendungen - Bremsen - Fachbegriffe (ISO
général (ISO 24478:2023, y compris version corrigée 24478:2023, einschließlich korrigierte fassung 2024-
2024-05) 04)
This European Standard was approved by CEN on 1 August 2024.

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. 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 CEN
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 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 24478:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 24478:2023, including corrected version 2024-04 has been prepared by Technical
Committee ISO/TC 269 "Railway applications” of the International Organization for Standardization
(ISO) and has been taken over as EN ISO 24478:2024 by Technical Committee CEN/TC 256 “Railway
applications” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by February 2025, and conflicting national standards
shall be withdrawn at the latest by February 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 14478:2017.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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 the
United Kingdom.
Endorsement notice
The text of ISO 24478:2023, including corrected version 2024-04 has been approved by CEN as
International
Standard
ISO 24478
First edition
Railway applications — Braking —
2023-08
General vocabulary
Corrected version
Applications ferroviaires — Freinage — Vocabulaire général
2024-04
Reference number
ISO 24478:2023(en) © ISO 2023
ISO 24478:2023(en)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 24478:2023(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Basic definitions .1
3.2 Brake system compatibility .1
3.3 Performance .2
3.4 Purposes of braking .2
3.5 Mechanics of braking .2
3.6 Kinematics and dynamics of braking .4
3.7 Types and characteristics of brakes .9
3.8 Brake application and release .11
3.9 Brake control. 12
3.9.1 General definitions . 12
3.9.2 Types of control . 13
3.9.3 Types of combined control .14
3.10 Brake system components .14
3.10.1 Components used for the command and control of braking .14
3.10.2 Sensors/indicators .16
3.10.3 Control assemblies .16
3.10.4 Brake control and/or system energy lines .17
3.10.5 Friction brake system components .18
3.10.6 Brake system energy storage . 20
3.10.7 Compressed air supply .21
3.10.8 Ancillary air system equipment .21
3.10.9 Hydraulic pressure supply . .21
3.10.10 Hand brake equipment. 22
3.10.11 Parking brake equipment . 22
3.11 Wheel slide protection (WSP). 22
3.12 Types of brake test . 23
4 Symbols and abbreviated terms.23
Annex A (informative) Delay time and build-up time for brake application .24
Annex B (informative) Delay time and release time for brake release .25
Annex C (informative) Brake chart .26
Annex D (informative) Overview of relationship between brake devices and signals .29
Annex E (informative) System set up and components .30
Bibliography .33

iii
ISO 24478:2023(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility tha
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