This document applies to automatic variable load sensing devices designed to continuously sense the load of a railway vehicle and provide a pneumatic output signal that can be used by a relay valve for the automatic variation of the air pressure used for brake applications, thereby adjusting the brake force accordingly to achieve the required brake performance.<\/p>\n
This document specifies the requirements for the design, testing and quality assurance of automatic variable load sensing devices.<\/p>\n
The requirements of this document are not fully applicable for tests on vehicle level (vehicle homologation tests).<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 4 Symbols and abbreviations 5 Design and manufacture 5.1 General 5.2 Functional requirements 5.2.1 Operating requirements 5.2.2 Characteristics of weighing valves <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 5.2.3 Mechanical requirements 5.2.4 Tightness 5.3 Fire behaviour <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 5.4 Shock and vibration 5.5 Service life 5.6 Compressed air quality 5.7 Environmental conditions 5.7.1 General 5.7.2 Ambient temperature 5.7.3 Altitude <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5.7.4 Humidity 5.7.5 Rain 5.7.6 Snow, ice and hail 5.7.7 Solar radiation 5.7.8 Pollution <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.8 External appearance 5.9 Design requirements regarding pressure stress 5.10 Pneumatic connections 6 Type tests 6.1 General <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 6.2 Individual automatic variable load sensing device type tests 6.2.1 Test bench for individual automatic variable load sensing devices type tests <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 6.2.2 Sampling for type test 6.2.3 Test requirements <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.2.4 Check of physical and geometrical characteristics 6.2.4.1 Procedure 6.2.4.2 Pass\/fail criteria 6.2.5 Tightness 6.2.5.1 General 6.2.5.2 Leakage for F = 0 kN <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 6.2.5.3 Leakage for F = 10 kN 6.2.5.4 Leakage for F = 50 kN 6.2.6 Characteristic, hysteresis 6.2.6.1 Procedure <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 6.2.6.2 Pass\/fail criteria 6.2.7 Operation at extreme temperature 6.2.7.1 General <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.2.7.2 Leakage for F = 0 kN 6.2.7.3 Leakage for F = 10 kN 6.2.7.4 Leakage for F = 50 kN 6.2.7.5 Characteristic and hysteresis at extreme temperatures <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.2.8 Shock and vibration tests 6.2.8.1 Procedure <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.2.8.2 Test sequence 6.2.8.3 Pass\/fail criteria 7 In-service assessment 8 Designation 9 Identification and marking <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Annex A (informative)Assessment of an automatic variable load sensing device when fitted to a vehicle A.1 General A.2 Design acceptance testing set up A.3 Running tests A.3.1 General A.3.2 Pneumatic automatic variable load sensing device \u2013 Air consumption A.3.2.1 Procedure A.3.2.2 Pass\/fail criteria <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | A.3.3 Automatic variable load sensing device \u2013 Output signal variation A.3.3.1 Procedure A.3.3.2 Pass\/fail criteria <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Annex B (normative)In-service assessment <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Annex ZA (informative)Relationship between this European Standard and the Essential Requirements of EU Directive 2016\/797\/EU aimed to be covered <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Railway applications. Braking. Automatic variable load sensing devices<\/b><\/p>\n |