Railway applications - Braking - Automatic variable load sensing devices

This European Standard applies to automatic variable load sensing devices designed to continuously sense the load of a railway vehicle and provide a signal that can be used by a relay valve for the automatic variation of the air pressure used for brake application, thereby adjusting the brake force accordingly to achieve the required brake performance. This European Standard specifies the requirements for the design, dimensions, manufacture and testing of automatic variable load sensing devices.

Bahnanwendungen - Bremse - Automatisch kontinuierlich wirkende Lasterfassungseinrichtungen

Die vorliegende Europäische Norm gilt für automatisch kontinuierlich wirkende Lasterfassungseinrichtungen
(Wiegeventile), die so beschaffen sind, dass sie die Last eines Eisenbahnfahrzeuges kontinuierlich erfassen
und ein Signal erzeugen, das von einem Relaisventil für die automatische Anpassung des für eine
Bremsbetätigung verwendeten pneumatischen Drucks benutzt wird, wodurch die Bremskraft zur Erzielung der
geforderten Bremsleistung entsprechend angepasst werden kann.
In der vorliegenden Europäischen Norm werden die Anforderungen an die Konstruktion, die Abmessungen,
die Herstellung und Prüfung von Wiegeventilen festgelegt.

Applications ferroviaires - Freinage - Dispositifs de pesée variable automatiques

La présente Norme européenne s’applique aux dispositifs de pesée destinés à détecter en permanence la charge
d’un véhicule ferroviaire et à fournir un signal utilisable par un relais pneumatique destiné à faire varier de façon
automatique la pression d’air utilisée pour le freinage, ajustant ainsi la force de freinage en conséquence pour obtenir
les performances de freinage requises.
La présente Norme européenne spécifie les exigences relatives à la conception, aux dimensions, à la fabrication et
aux essais des dispositifs de pesée.

Železniške naprave - Zavore - Naprave za samodejno zaznavanje spremembe obtežbe

Ta evropski standard velja za naprave za samodejno zaznavanje sprememb obremenitve, načrtovane za neprekinjeno zaznavanje obremenitve na železniških vozilih, ki zagotavljajo signal, s katerim lahko relejni ventil za samodejno variacijo zračnega pritiska v zavorah primerno prilagaja silo zaviranja, da se zagotovi zahtevano delovanje zavor. Ta evropski standard določa zahteve za načrtovanje, mere, izdelavo in preskušanje naprav za samodejno zaznavanje spremembe obremenitve.

General Information

Status
Withdrawn
Publication Date
13-Mar-2011
Withdrawal Date
17-Feb-2021
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
18-Feb-2021
Due Date
13-Mar-2021
Completion Date
18-Feb-2021

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Železniške naprave - Zavore - Naprave za samodejno zaznavanje spremembe obtežbeBahnanwendungen - Bremse - Automatisch kontinuierlich wirkende LasterfassungseinrichtungenApplications ferroviaires - Freinage - Dispositifs de pesée variable automatiquesRailway applications - Braking - Automatic variable load sensing devices45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineeringICS:Ta slovenski standard je istoveten z:EN 15625:2008+A1:2010SIST EN 15625:2009+A1:2011en,fr,de01-april-2011SIST EN 15625:2009+A1:2011SLOVENSKI

STANDARD
SIST EN 15625:2009+A1:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15625:2008+A1
October 2010 ICS 45.060.01 Supersedes EN 15625:2008English Version
Railway applications - Braking - Automatic variable load sensing devices

Applications ferroviaires - Freinage - Dispositifs de pesée variable automatiques

Bahnanwendungen - Bremse - Automatisch kontinuierlich wirkende Lasterfassungseinrichtungen This European Standard was approved by CEN on 13 September 2008 and includes Amendment 1 approved by CEN on 30 August 2010.

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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15625:2008+A1:2010: ESIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 2 Contents Page Foreword ..............................................................................................................................................................41 Scope ......................................................................................................................................................52 Normative references ............................................................................................................................53 Terms, definitions and symbols ...........................................................................................................53.1 Terms and definitions ...........................................................................................................................53.2 Symbols ..................................................................................................................................................64 Design and manufacture .......................................................................................................................64.1 General ....................................................................................................................................................64.2 Functional requirements .......................................................................................................................74.2.1 Operating requirements ........................................................................................................................74.2.2 Characteristics of weighing valves ......................................................................................................74.2.3 Mechanical requirements ......................................................................................................................94.2.4 Leakage ...................................................................................................................................................94.3 Vibrations and shock ............................................................................................................................94.4 Environment ...........................................................................................................................................94.4.1 General ....................................................................................................................................................94.4.2 Temperature ........................................................................................................................................ 104.4.3 Other environmental conditions ....................................................................................................... 104.5 Compressed air quality ...................................................................................................................... 124.6 Service life ........................................................................................................................................... 124.7 Fire behaviour ..................................................................................................................................... 124.8 External appearance ........................................................................................................................... 124.9 Design requirements regarding pressure stress ............................................................................ 124.10 Interfaces ............................................................................................................................................. 134.10.1 Mechanical ........................................................................................................................................... 134.10.2 Pneumatic ............................................................................................................................................ 135 Materials .............................................................................................................................................. 136 Type tests ............................................................................................................................................ 136.1 General ................................................................................................................................................. 136.2 Individual automatic variable load sensing device type tests ....................................................... 136.2.1 Test bench for individual automatic variable load sensing devices type tests ........................... 136.2.2 Sampling for type test ........................................................................................................................ 146.2.3 Test requirements ............................................................................................................................... 156.2.4 Check of physical and geometrical characteristics ........................................................................ 156.2.5 Leakage ................................................................................................................................................ 166.2.6 Characteristic, hysteresis .................................................................................................................. 176.2.7 Operation at extreme temperatures .................................................................................................. 186.2.8 Vibration and shock tests .................................................................................................................. 207 Routine tests (serial tests) and inspection ...................................................................................... 207.1 General ................................................................................................................................................. 207.2 Check of characteristic ...................................................................................................................... 207.2.1 Procedure ............................................................................................................................................ 207.2.2 Pass/fail criteria .................................................................................................................................. 218 Type validation .................................................................................................................................... 219 Documentation .................................................................................................................................... 2110 Designation ......................................................................................................................................... 22SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 3 11 Identification and marking .................................................................................................................. 22Annex A (informative)

Assessment of an automatic variable load sensing device when fitted to a vehicle................................................................................................................................................... 23A.1 Vehicle assessment – Testing set up ................................................................................................ 23A.2 Design acceptance testing set up ..................................................................................................... 23A.3 Running tests ....................................................................................................................................... 23A.3.1 General ................................................................................................................................................. 23A.3.2 Pneumatic automatic variable load sensing device – Air consumption ....................................... 23A.3.3 Automatic variable load sensing device – Output signal variation ............................................... 24Annex ZA (informative)

!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)"""" ........................................................................................................................................... 25!!!!deleted text"""" Bibliography ...................................................................................................................................................... 31 SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 4 Foreword This document (EN 15625:2008+A1:2010) has been prepared 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 April 2011, and conflicting national standards shall be withdrawn at the latest by April 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1, approved by CEN on 2010-08-30. This document supersedes EN 15625:2008. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". !This document has been prepared under a mandate given to CEN/CENELEC/ETSI by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2008/57/EC. For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an integral part of this document." 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 5 1 Scope This European Standard applies to automatic variable load sensing devices designed to continuously sense the load of a railway vehicle and provide a signal that can be used by a relay valve for the automatic variation of the air pressure used for brake application, thereby adjusting the brake force accordingly to achieve the required brake performance. This European Standard specifies the requirements for the design, dimensions, manufacture and testing of automatic variable load sensing devices. 2 Normative references The following referenced documents are indispensable for the application 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 14478:2005, Railway applications — Braking — Generic vocabulary EN 50125-1, Railway applications — Environmental conditions for equipment — Part 1: Equipment on board rolling stock EN 60721-3-5:1997, Classification of environmental conditions — Part 3: Classification of groups of environmental parameters and their severities — Section 5: Ground vehicle installations (IEC 60721-3-5:1997) EN 61373:1999, Railway applications — Rolling stock equipment — Shock and vibration tests (IEC 61373:1999) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) ISO 8573-1:2001, Compressed air — Part 1: Contaminants and purity classes 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14478:2005 and the following apply. 3.1.1 automatic variable load sensing device weighing device device connected to the vehicle, which responds to the loading of that vehicle to provide a continuous load proportional signal to the brake control device NOTE The load input is normally a share of the wagon’s mass because of the devices position in the vehicle suspension system. The result is a pneumatic output signal pressure that can be any value between a minimum at tare mass and a maximum at maximum mass. Most of the existing self-adjusting load-dependant brakes generate the load signal using a weighing device. 3.1.2 mechanically operated pneumatic device device or mechanism having both mechanical and pneumatic elements SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 6 3.1.3 hydraulic to pneumatic converter device or mechanism which transforms the hydraulic pressure generated by the mass of the vehicle into a pneumatic pressure with a defined transmission ratio 3.1.4 elastomeric to pneumatic converter device or mechanism having both elastomeric and pneumatic components, which transforms the pressure in the elastomer generated by the mass of the vehicle into a pneumatic pressure with a defined transmission ratio 3.1.5 output signal pressure load continuous pressure Lcp output pressure delivered by the automatic variable load sensing device, which signals the load of the vehicle to the brake control mechanism 3.1.6 supply pressure input pressure of the air supply to a pneumatic automatic variable load sensing device NOTE Typically supplied from the vehicle's distributor auxiliary reservoir, or from the vehicle distributor output pressure/brake cylinder pressure system. 3.1.7 normal litre Nl unit of mass for gases equal to the mass of 1 l at a pressure of 1,013 2 bar (1 atmosphere) and at a standard temperature, often 0 °C or 20 °C NOTE Airflow is often stated in normal litres per minute (Nl/min). 3.1.8 sensitivity minimum change of load which causes a variation of the output signal pressure (Lcp), when the change of load (input) is in the same direction 3.1.9 hysteresis difference in output signal pressure (Lcp) with the same load, where the load is first rising to a value and then, having been taken past that value, subsequently falls to the same value 3.2 Symbols F [kN] mechanical force, generated by the share of vehicle weight acting at the automatic variable load sensing device 4 Design and manufacture 4.1 General The design and manufacture of the automatic variable load sensing device shall, for all intended operating conditions, take into account the following requirements. SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 7 4.2 Functional requirements 4.2.1 Operating requirements The automatic variable load sensing device shall, in all cases, supply a pneumatic output signal pressure (Lcp) which is a function of the load. The transmission of this load signal to the brake control system shall be pneumatic. The method of producing the pneumatic signal Lcp can be a mechanically operated pneumatic device, a hydraulic to pneumatic converter or an elastomeric to pneumatic converter. Figure 1 indicates the principles of operation of an automatic variable load sensing device.

Key 1 automatic variable load sensing device 2 F, mechanical force, generated by a share of the vehicle weight 3 supply pressure, typically taken from the distributor auxiliary reservoir 4 Lcp, output signal pressure Figure 1 — Principles of operation of the automatic variable load sensing device 4.2.2 Characteristics of weighing valves Two characteristics of weighing valves are defined:  type 1: (0,8 ± 0,1) bar/10 kN (see Figure 2);  type 3: (1,0 ± 0,1) bar/10 kN (see Figure 3). The characteristics for type 1 and type 3 shall be tested in accordance with 6.2.6. NOTE These types are recommended for new interoperable freight wagons. For applications other than interoperable freight wagons other characteristics may be used by agreement between the manufacturer and the customer.

SIST EN 15625:2009+A1:2011
EN 15625:2008+A1:2010 (E) 8

Key 1 characteristic (nominal value) 2 upper limit of tolerance 3 lower limit of tolerance Figure 2 — Characteristic of the automatic variable load sensing device type 1

Key 1 characteristic (nominal value) 2 upper limit of tolerance 3 lower limit of tolerance Figure 3 — Characteristic of the automatic variable load sensing device type 3 SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 9 4.2.3 Mechanical requirements The automatic variable load sensing device shall be designed to operate with at least a static force F of 60 kN without any damage or change of its characteristic. This shall be tested in accordance with 6.2.6. 4.2.4 Leakage The sealing arrangement within the automatic variable load sensing device shall prevent any unacceptable loss of air. At of (20 ± 5) °C the automatic variable load sensing device shall not have a leakage rate greater than 0,005 Nl/min at the normal working pressure. This requirement shall be tested in accordance with 6.2.5.2, 6.2.5.3 and 6.2.5.4. At an environmental temperature of – 25 °C, also at + 70 °C, the automatic variable load sensing device shall not have a leakage rate greater than 0,01 Nl/min at the normal working pressure. This requirement shall be tested in accordance with 6.2.7.2, 6.2.7.3 and 6.2.7.4. At – 40 °C ≤ environmental temperature < – 25 °C the automatic variable load sensing device shall not have a leakage rate greater than 0,1 Nl/min at the normal working pressure. This requirement shall be tested in accordance with 6.2.7.2, 6.2.7.3 and 6.2.7.4. 4.3 Vibrations and shock The automatic variable load sensing device shall be able to operate without restriction under vibration and shock conditions as specified by EN 61373:1999, Category 2. This requirement shall be tested in accordance with 6.2.8. The automatic variable load sensing device shall fulfil the specified requirements during a random vibration test in accordance with EN 61373:1999, Clause 8. The automatic variable load sensing device shall withstand a simulated long life test at increased random vibration levels in accordance with EN 61373:1999, Clause 9, without any loss of performance. The automatic variable load sensing device shall withstand shock testing in accordance with EN 61373:1999, Clause 10, without any loss of performance. The above shall be tested in accordance with 6.2.8. 4.4 Environment 4.4.1 General The design shall take into account that the automatic variable load sensing device shall be able to be put into service and operate normally in the conditions and climatic zones for which it is designed and in which it is likely to run, as specified in this European Standard. NOTE 1 The environmental conditions are expressed in classes for temperature etc. thereby giving the vehicle designer the choice of an automatic variable load sensing device suitable for operation on a vehicle all over Europe, or have a restricted use. NOTE 2 The environment range limits specified are those that have a low probability of being exceeded. All specified values are maximum or limit values. These values may be reached, but do not occur permanently. Depending on the situation there can be different frequencies of occurrence related to a certain period of time. NOTE 3 The environment requirements of this European Standard cover the environment requirements of the HS RST TSI which only refers to EN 50125-1:1999. SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 10 The automatic variable load sensing device shall be tested in accordance with requirements given in Clause 6 including where required environmental/climatic testing. 4.4.2 Temperature The automatic variable load sensing device covered by this European Standard shall be able to operate:  at – 25 °C ≤ environmental temperature ≤

70 °C without any deviation from the technical requirements specified in Clause 4;  at – 40 °C ≤ environmental temperature < – 25 °C with allowed deviation from the technical requirements specified in this European Standard but without affecting the function of the automatic variable load sensing device. Deviations from the technical requirement when testing at extremes are defined in 6.2.7. The purchaser can specify higher or lower extreme temperature limit values if operational constraints demand it. In this case the temperature limit values used in the extreme temperature tests of 6.2.7 shall be changed accordingly. 4.4.3 Other environmental conditions 4.4.3.1 General The following environmental conditions shall be considered in the design of the automatic variable load sensing device. It shall be demonstrated that these environmental conditions have been taken into account in the design of the automatic variable load sensing device. It is sufficient for the supplier to make a declaration of conformity stating how the environmental conditions in the following clauses have been taken into account. If not specifically required to be tested as part of the type testing requirements in Clause 6, suitable tests and/or design assessments considering the effect of the following environmental conditions on the automatic variable load sensing device, shall be used in the development/design proving of the automatic variable load sensing device, prior to type testing. 4.4.3.2 Altitude The automatic variable load sensing device shall be able to operate without restrictions up to an altitude of 2 000 m. 4.4.3.3 Humidity The following external humidity levels shall be considered:  yearly average: ≤ 75 % relative humidity;  on 30 days in the year continuously: between 75 % and 95 % relative humidity;  on the other days occasionally: between 95 % and 100 % relative humidity;  maximum absolute humidity: 30 g/m3 occurring in tunnels. An operationally caused infrequent and slight moisture condensation shall not lead to any malfunction or failure. SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 11 The psychometric charts contained in EN 50125-1 shall be used to establish the range of variation of the relative humidity for the different temperature classes that it is considered will not be exceeded for more than 30 days per year. At cooled surfaces, 100 % relative humidity can occur, causing condensation on parts of equipment; this shall not lead to any malfunction or failure. Sudden changes of the air temperature local to the vehicle can cause condensation of water on parts of equipment with rate of 3 K/s and maximum variation of 40 K; these conditions particularly occurring when entering or leaving a tunnel shall not lead to any malfunction or failure of the equipment. 4.4.3.4 Rain Rain rate of 6 mm/min shall be taken into account. The effect of rain shall be considered depending on the possible equipment installation together with wind and vehicle movement. 4.4.3.5 Snow, ice and hail Consideration shall be given to the effect of all kinds of snow, ice and/or hail. The maximum diameter of hailstones shall be taken as 15 mm, larger diameter can occur exceptionally. The effect of snow, ice and hail shall be considered depending on the equipment installation together with wind and vehicle movement. 4.4.3.6 Solar radiation Equipment design shall allow for direct exposure to solar radiation at the rate of 1 120 W/m2 for a maximum duration of 8 h. 4.4.3.7 Resistance to pollution The effects of pollution shall be considered in the design of equipment and components. Means may be provided to reduce pollution by the effective use of protection of the automatic variable load sensing device. The severity of pollution can depend upon the location of the equipment therefore the effects of the kinds of pollution indicated in Table 1 shall be considered as a minimum. Table 1 — Pollution Pollution Class to be considered Chemically active substances Class 5C2 of EN 60721-3-5:1997 Contaminating fluids Class 5F2 (electrical engine) of EN 60721-3-5:1997 Class 5F3 (thermal engine) of EN 60721-3-5:1997 Biologically active substances Class 5B2 of EN 60721-3-5:1997 Dust Class 5S2 of EN 60721-3-5:1997 Stones and other objects Ballast and other objects of maximum 15 mm diameter Sand Class 5S2 of EN 60721-3-5:1997 Sea spray Class 5C2 of EN 60721-3-5:1997

SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 12 4.5 Compressed air quality It shall be possible to operate the automatic variable load sensing device without restrictions with at least the compressed air quality according to the following classes defined by ISO 8573-1:2001:  class 4 – for the maximum particle size and the maximum concentration of solid contaminants;  class 4 – for the water dew point;  class 4 – for the maximum total (droplets, aerosols and vapours) oil concentration. The automatic variable load sensing device shall be capable of operating in an air supply system that is not fitted with an air dryer, or when the air dryer is out of order. The air system should therefore include some means of preventing water collecting within the automatic variable load sensing device and hence freezing of the water in conditions below 0 °C. 4.6 Service life No specific requirements for the automatic variable load sensing device to attain a particular service life are contained in this European Standard. Any testing to establish the service life of an automatic variable load sensing device shall be conducted as part of the product development. NOTE The service life of the automatic variable load sensing device is a function of the environment/operating conditions in which the automatic variable load sensing device will function, and the requirements for the automatic variable load sensing device to achieve a serviceable life in accordance with the maintenance requirements of the vehicle to which it is fitted. 4.7 Fire behaviour The materials used in the manufacture of the automatic variable load sensing device shall prevent the emission of fumes or gases that are harmful and dangerous to the environment, particularly in the event of fire. The assembled automatic variable load sensing device shall limit fire ignition, propagation and the production of smoke in the event of fire on primary ignition from a source of 7 kW for 3 min. 4.8 External appearance The dimensions and the co-ordinates and threads of the ports and fixing points of the automatic variable load sensing device shall comply with the details given by the relevant drawing. The design of the automatic variable load sensing device shall ensure that the exterior surfaces of the automatic variable load sensing device are free of sharp edges and corners that could be dangerous to those people handling the automatic variable load sensing device or, when installed on a vehicle, working on adjacent equipment. This requirement shall be checked in accordance with 6.2.4. 4.9 Design requirements regarding pressure stress The automatic variable load sensing device shall be able to withstand a supply pressure of 10 bar. SIST EN 15625:2009+A1:2011

EN 15625:2008+A1:2010 (E) 13 4.10 Interfaces 4.10.1 Mechanical The mechanical connection points to the vehicle shall be suitably sized to meet the physical loadings iden

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