oSIST prEN 16834:2025
(Main)Railway applications - Braking - Brake performance
Railway applications - Braking - Brake performance
This document defines a harmonized way to assess the braking performance by test of locomotives, passenger coaches, freight wagons, railbound construction and maintenance machines, and self-propelled passenger trains (multiple units) including high speed trains.
The document sets out the standardized method for undertaking brake performance tests and the correction factors to be applied to the data obtained for all types of rolling stock.
This document also defines the methods to assess the brake performance in terms of stopping distance, and from this the process to determine vehicle(s) deceleration and braked weight.
It then deals with conversion of the braked weight to the braked weight percentage of a vehicle or train for operating purposes. It also sets out additional factors when determining the braked weight percentage of a train calculated from specified braked weight, depending on the formation of the train.
In Annex D there is a method for determining brake performance of freight wagons fitted with P10 cast iron or LL-blocks using limited testing (force measurement).
Bahnanwendungen - Bremse - Bremsvermögen
Dieses Dokument legt eine harmonisierte Verfahrensweise zur Bewertung des Bremsvermögens durch Prüfung von Lokomotiven, Reisezugwagen, Güterwagen, schienengebundene Bau- und Instandhaltungsmaschinen und selbstangetriebene Personenzüge (Triebzüge) einschließlich Hochgeschwindigkeitszügen fest.
Dieses Dokument legt das Normverfahren für die Durchführung von Prüfungen des Bremsvermögens und die Korrekturfaktoren dar, die auf die für alle Arten von Schienenfahrzeugen gewonnenen Daten anzuwenden sind.
Dieses Dokument legt auch die Verfahren zur Bewertung des Bremsvermögens in Bezug auf den Anhalteweg und, davon ausgehend, den Prozess zur Bestimmung der Fahrzeugverzögerung und des Bremsgewichts fest.
Es befasst sich mit der Umwandlung des Bremsgewichts eines Fahrzeugs oder Zuges in Bremshundertstel für betriebliche Zwecke. Es legt auch die zusätzlichen Faktoren bei der Bestimmung des Bremshundertstel eines Zuges fest, das in Abhängigkeit von der Zugbildung aus dem festgelegten Bremsgewicht berechnet wird.
Anhang D enthält ein Verfahren zur Bestimmung des Bremsvermögens von Güterwagen, die mit Bremsklötzen aus Grauguss P10 oder LL Bremsklötzen ausgestattet sind, basierend auf einer vereinfachten Messung (Kraftmessung).
Applications ferroviaires - Freins - Performance de freinage
Le présent document définit une méthode harmonisée pour évaluer la performance de freinage par essai des locomotives, des voitures voyageurs, des wagons, des machines de construction et de maintenance empruntant exclusivement les voies ferrées, et des rames automotrices (automoteur) y compris des trains à grande vitesse.
Le présent document décrit la méthode normalisée pour réaliser les essais de performance de freinage, ainsi que les facteurs de correction à appliquer aux données obtenues pour tous les types de matériels roulants.
Le présent document définit également les méthodes d'évaluation de la performance de freinage en termes de distance d'arrêt et, à partir de celle-ci, le processus pour déterminer la décélération et la masse freinée du ou des véhicules.
Il traite ensuite de la conversion de la masse freinée en pourcentage de masse freinée d'un véhicule ou d'un train pour l'utilisation en service. Il présente également des facteurs supplémentaires pour la détermination du pourcentage de masse freinée d'un train calculé à partir d'une masse freinée spécifiée, selon la composition du train.
L'Annexe D spécifie une méthode pour déterminer la performance de freinage des wagons équipés de semelles en fonte P10 ou de semelles LL en utilisant des essais limités (mesurage de l'effort).
Železniške naprave - Zavore - Značilnosti zavore
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Železniške naprave - Zavore - Značilnosti zavore
Railway applications - Braking - Brake performance
Bahnanwendungen - Bremse - Bremsvermögen
Applications ferroviaires - Freins - Performance de freinage
Ta slovenski standard je istoveten z: prEN 16834
ICS:
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.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2025
ICS 45.040 Will supersede EN 16834:2019
English Version
Railway applications - Braking - Brake performance
Applications ferroviaires - Freins - Performance de Bahnanwendungen - Bremse - Bremsvermögen
freinage
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 16834:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 5
5.1 General. 11
5.2 Brake assessment with braked weights . 12
5.3 Brake assessment with deceleration’s method . 13
6.1 Test methods . 13
6.2 Load conditions for tests . 15
6.3 Speeds to be used for testing . 17
6.4 Method of execution of the test . 18
6.5 Test in degraded mode and degraded conditions . 19
6.6 Evaluating the test results for stopping distance . 20
6.7 Stationary brake testing . 28
6.8 Calculation of the longitudinal jerk during braking . 29
7.1 General. 29
7.2 Physical principles . 30
7.3 Determining the parameters required for brake performance . 31
7.4 Assessment of performance under degraded conditions . 34
8.1 General. 36
8.2 Coaches and multiple units . 37
8.3 Additional assessment for coaches operating with a speed above 160 km/h from vehicles
test . 37
8.4 Freight wagons in P . 38
8.5 Freight wagons and coaches in G . 38
8.6 Locomotives . 38
8.7 Magnetic track brake and eddy current brake . 39
8.8 EP brake (direct EP brake and EP assist) . 39
8.9 Brake pipe accelerators . 39
Annex A (normative) Brake assessment for trains . 41
A.1 Assessment sheet for trains using brake positions P, P+X, R, R+X . 41
A.2 Overview of the mathematical formulae for the assessment curves for trains using brake
positions P, P+X, R, R+X . 43
Annex B (normative) Brake assessment for single vehicles . 44
B.1 Assessment sheet for single vehicles using brake positions P, P+X, R, R+ . 44
B.2 Overview of the mathematical formulae for the assessment curves for single vehicles using
brake positions P, P+X, R, R+X . 46
Annex C (informative) Checking of the friction pairing of disc-braked single vehicles . 47
C.1 Diagram for checking the friction pairing of disc-braked single vehicles . 47
C.2 Overview of the mathematical formulae for the assessment curves for checking the friction
pairing of disc-braked single vehicles . 49
Annex D (normative) Determining the brake performance of freight wagons fitted with cast iron
brake blocks (P10) or fully certified and exchangeable LL-blocks . 50
Annex E (normative) Determining the equivalent brake response time . 53
E.1 General. 53
E.2 Determining the equivalent brake response time based on train deceleration . 53
E.3 Determining the equivalent brake response time based on brake cylinder filling times . 53
E.4 Determining the equivalent brake response time based on calculation . 54
Annex F (informative) Conversion model for ERTMS/ETCS. 55
F.1 Introduction . 55
F.2 Symbols for this annex . 55
F.3 Scope of validity of model . 57
F.4 Brake model . 58
F.5 Example of calculation of the stopping or slowing distance . 65
Annex G (normative) Assessment sheet for individual vehicles running at speeds of less than
100 km/h using brake positions P and R . 66
G.1 Assessment sheet for individual vehicles fitted with cast iron blocks (P10) at speeds below
100 km/h . 66
G.2 Overview of the mathematical formulae used in assessment curves for individual vehicles
fitted with cast iron blocks (P10) at speeds below 100 km/h. 68
G.3 Assessment sheet for individual vehicles fitted with EN-UIC brake system and disc brakes
or K-blocks at speeds below 100 km/h . 68
G.4 Overview of the mathematical formulae used in assessment curves for individual vehicles
fitted with EN-UIC disc brakes or composite brake blocks at speeds below 100 km/h . 70
Annex H (normative) Procedure for verifying the maximum utilization of adhesion between
wheel and rail . 71
H.1 Symbols for this annex . 71
H.2 General . 71
H.3 Prerequisites . 71
H.4 Determination of the maximum equivalent mean deceleration based on distance relevant
for adhesion ā . 72
max,τ
H.5 Calculation of the mean friction coefficient for the friction brake µ of the test . 72
m
H.6 Calculation of the maximum utilization of adhesion between wheel and rail τ . 72
max
Annex I (informative) Example for verifying the maximum utilization of adhesion between wheel
and rail for non-homogenous friction brake equipment . 74
I.1 Non-homogenous friction brake equipment . 74
I.2 Variation of brake cylinder pressure during brake application . 74
Annex J (informative) Example for correction and validation of test results exceeding mandatory
test conditions — treatment of curve radii lower than 1 000 m . 77
J.1 Introduction of a correction factor α . 77
curve
J.2 Determination correction factor α . 77
curve
Annex K (informative) Examples of correction of the mean stopping distance to nominal state of
the brake system . 79
K.1 Description of the train . 79
K.2 Simplified method . 80
K.3 Speed-range method . 82
K.4 Step-by-step method . 85
Annex L (informative) Recommendations for the use of braked weight percentage in operation
............................................................................................................................................................................. 86
L.1 General. 86
L.2 Principles of use for trains operating in P mode .
...
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