EN 15612:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Železniške naprave - Zavore - Pospešilnik praznjenja glavnega zavornega vodaBahnanwendungen - Bremse - SchnellbremsbeschleunigungsventilRailway applications - Braking - Brake pipe accelerator valve45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineeringICS:Ta slovenski standard je istoveten z:EN 15612:2008SIST EN 15612:2009en,fr01-januar-2009SIST EN 15612:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15612November 2008ICS 45.060.01 English VersionRailway applications - Braking - Brake pipe accelerator valveApplications ferroviaires - Freinage - Valve accélératrice devidangeBahnanwendungen - Bremse -SchnellbremsbeschleunigungsventilThis European Standard was approved by CEN on 27 September 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15612:2008: ESIST EN 15612:2009

Relationship between this European Standard and the Essential Requirements of EU Directive 96/48/EC, as modified by Directive 2004/50/EC.21 Annex ZB (informative)
Relationship between this
European
Standard and the Essential Requirements
of EU Directive 2001/16/EC of the European Parliament and of the Council of 19 March 2001 on the interoperability of the trans-European conventional rail system, as modified by EU Directive 2004/50/EC of 29 April 2004.22 Bibliography.23
No functional errors shall occur in the operation of the brake pipe accelerator valve at operating (running) pressures of (5 ± 1) bar. This requirement shall be proven by testing in accordance with 6.2.4.10. 4.2.3 Train/vehicle behaviour The brake pipe accelerator valve shall exhaust the air from the brake pipe without causing any adverse effect on vehicle/train behaviour. This requirement shall be proven by testing in accordance with 6.3. 4.2.4 Affect of overcharge 4.2.4.1 Overcharge after full service application The brake pipe accelerator valve shall not come into operation due to the effect of an operating pressure overcharge after a full service brake application, which allows a build up of brake pipe pressure above normal operating pressure to 6 bar. It shall be taken into account that this overcharge can be present for up to 40 s in braking mode “G” and 10 s in braking mode “P” after a full service application. This requirement shall be proven by testing in accordance with 6.2.4.8. 4.2.4.2 Overcharge starting from operating pressure The brake pipe accelerator valve shall not come into operation if the brake pipe pressure, starting from the operating pressure, is raised to 6 bar for 2 s, then is reduced to 5,2 bar in 1 s, followed by a return to the operating pressure at a rate of 0,15 bar in 60 s. This requirement shall be proven by testing in accordance with 6.2.4.9. 4.2.5 Affect of individual vehicle The operation of the brake pipe accelerator valve shall not be affected by an individual vehicle with a brake pipe volume not exceeding 25 l, where a brake pipe accelerator valve is not fitted or the brake has been isolated. This shall apply irrespective of the position of that vehicle in the train consist. This requirement shall be proven by testing in accordance with 6.3. 4.2.6 Subsequent emergency application The brake pipe accelerator valve shall come into operation when an emergency brake application is made after a full service brake application. This requirement shall be proven by testing in accordance with 6.2.4.7. 4.2.7 Sensitivity The brake pipe accelerator valve shall come into operation no later than 2 s after the pressure in the brake pipe, venting to atmosphere, has fallen from 5 bar to 3,2 bar within 3 s. This requirement shall be proven by testing in accordance with 6.2.4.4. 4.2.8 Insensitivity to brake pipe pressure fall The brake pipe accelerator valve shall not come into operation when the pressure in the brake pipe falls uniformly from 5 bar to 3,2 bar over 6 s with the distributor inoperative. Continuing the pressure fall down to 2,5 bar shall not cause the brake pipe accelerator valve to operate. This requirement shall be proven by testing in accordance with 6.2.4.5. SIST EN 15612:2009

NOTE This requirement will be specified in the relevant vehicle system standard. 4.2.11 Leakage Leakage of the brake pipe accelerator valve shall be such that technical performance as specified by this standard is met without restrictions. The sealing arrangement within the brake pipe accelerator valve shall prevent loss of air as follows when considering a brake pipe operating pressure of 6 bar:  At an environmental temperature of (20 ± 5) °C, the brake pipe accelerator valve shall not have a leakage rate of greater than 0,005 Nl/min. This requirement shall be proven by testing in accordance with 6.2.4.3.  At – 25 °C ≤ environmental temperature < 15 °C, also at 25 °C < environmental temperature ≤ 70 °C, the brake pipe accelerator valve shall not have a leakage rate of greater than 0,01 Nl/min at the normal working pressures. This requirement shall be proven by testing in accordance with 6.2.5.  At – 40 °C ≤ environmental temperature < – 25 °C, the brake pipe accelerator valve shall not have a leakage rate of greater than 0,1 Nl/min at normal working pressures. This requirement shall be proven by testing in accordance with 6.2.5. 4.3 Vibration and shocks requirements The brake pipe accelerator valve shall be able to operate without restriction under vibration and shock conditions as specified by EN 61373:1999, Category 1, Class A or B. This requirement shall be proven by testing in accordance with 6.2.4.11. 4.4 Environment requirements 4.4.1 General The design shall take into account that the brake pipe accelerator valve shall be able to be put into service and operate normally in the conditions and climatic zones for which it is intended to operate and in which it is likely to run, as specified in this standard. NOTE 1 The environmental conditions are expressed in classes for temperature, humidity etc. thereby giving the vehicle designer the choice of a brake pipe accelerator valve suitable for operation on a vehicle all over Europe, or have a restricted use. SIST EN 15612:2009

 at – 25 °C ≤ environmental temperature ≤
70 °C, without any deviation from the technical requirements specified in Clause 4 in this standard;  at – 40 °C ≤ environmental temperature < – 25 °C, with allowed deviation from the technical requirements specified in this standard but without affecting the function of the brake pipe accelerator valve. Deviations from the technical requirements when testing at extremes are defined in 6.2.5. 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 in 6.2.5 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 brake pipe accelerator valve. It shall be demonstrated that these environmental conditions have been taken into account in the design of the brake pipe accelerator valve. 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 of this standard, suitable tests and/or design assessments considering the effect of the following environmental conditions on the brake pipe accelerator valve, shall be used in the development/design proving of the brake pipe accelerator valve, prior to type testing. 4.4.3.2 Altitude The brake pipe accelerator valve 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. SIST EN 15612:2009
...