UIC 541-04

Automatic Variable Load Brake Testing

This test defines specifications for automatic variable load braking systems that adjust braking force proportionally to the vehicle's loading condition, optimizing stopping distance and wheel adhesion. The standard covers the design, functionality, and performance requirements of automatic load-sensing brake control equipment fitted to freight and passenger trains. Testing verifies that braking force automatically adjusts across the range from empty to fully loaded conditions, enhancing safety and reducing wheel slide risk. Accreditation for this test is critical for manufacturers of brake control systems and railway operators ensuring consistent, safe braking performance regardless of train loading.

What it measures

  • Load-proportional braking force adjustment mechanisms
  • Response characteristics across loading range
  • Wheel adhesion optimization and anti-lock performance
  • System reliability and fail-safe functionality
  • Pressure modulation and control accuracy
🇩🇪 DIN EN 14198 🇬🇧 BS EN 14198 🇫🇷 NF EN 14198 🇮🇹 UNI EN 14198 🇪🇸 UNE EN 14198 🇳🇱 NEN EN 14198
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ACCREDIA 00447 Firenze, IT
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UKAS 0123 Aberdeen, GB
DC Resistance DC VOLTAGE Temperatur-Simulation AC CURRENT Base metal thermocouples + 3 more
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ASTM D3338 ASTM D 2624 ASTM D 5006 ASTM D 2386 ASTM D7153 + 3 more
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UKAS 1158 Chester, GB
UK 3725 based on ASTM D2163 and BS EN 15984:2011-07 IP 411, ISO 6251 ASTM D6667 mod ISO 8973 modified + 3 more
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IWS Institut für Werkstoffkunde und Schweißtechnik

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Industrieanlagen- Betriebsgesellschaft mit beschränkter Haftung Kalibrierlabor

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ISO 17987-6 ISO 17987-7 ISO 16845
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Inotech Meter Calibration Systems

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DAkkS D-K-20838-01-02 Bietigheim, DE
Taupunkttemperatur Railway braking — urban guided transport Railway vehicle body structural requirem Railway bogies — wheelsets and bogies st Elektrische + 3 more
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UKAS 8401 Drighlington, GB
Appendix 5 of HSG 227 (2004))
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Institut für Hygiene und Umwelt

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DAkkS D-PL-14095-03-02 Hamburg, DE
DIN 38402-A 12 DIN ISO 5667-5 (A 14) DIN EN ISO 5667-6 (A 15) DIN EN ISO 19458 (K 19) DIN 19643-1 + 3 more
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Institut für Klinische Transfusionsmedizin und Immungenetik Ulm gemeinnützige

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Basophile Granulozyten Eosinophile Granulozyten Erythrozyten Lymphozyten Leukozyten + 3 more
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Institut für Lackprüfung Andreas Keiner

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ISO 2178 ISO 4892-2: 2013-03 UNE-EN ISO 11998 BS EN ISO 16474-3:2021 ISO 6270-1 + 3 more
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Institut für Mikrobiologie der Bundeswehr Zentralbereich Diagnostik

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DAkkS D-K-18657-01-01 Emmerthal, DE
Kurzschlussstrom 0,5 mA 0,1 V Füllfaktor Solarzellen* 25 % 0,01 mW THD U 0,1 % + 3 more
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Institute for International Product Safety

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DAkkS D-PL-19125-01-00 Bonn, DE
DIN EN IEC 60255-1 VDE 0435-300 DIN EN 60255-151 VDE 0435-3151 IEC 60255-151 + 3 more
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Intertek Caleb Brett GERMANY

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RvA L377 Geleen, NL
DIN EN ISO 10675-1 DIN EN ISO 19458 DIN EN ISO 179-1 NEN 6953 DIN EN ISO 10675-2 + 3 more
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Intona

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UKAS 10273 Dundee, GB
and Appx. 3 of HSG 227 (2004)) Executive guides HSG 264 (2012) (HSG 264, 2012)
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Isabellenhütte Heusler

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DAkkS D-K-19500-01-01 Dillenburg, DE
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Isserstedt Prüfmaschinen

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Härte* 20 HRA Härtevergleichsplatten 20 HRB 20 HRC 40 HRD + 3 more
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UKAS 2075 Colwyn Bay, GB
(HSG 248) – 2021 No 1 based on HSG 248 – 2021 (PCM) based on HSG 248 – 2021 No 3 based on HSG 248 – 2021 (PCM) based on HSG 248 + 1 more
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J.P. ALCARAZ ELECTRONICA

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ENAC LC10.259 Cartagena, ES
CEM EL-014 CEM EL CEM EL-001 CEM ME
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Industries

Railway rolling stock manufacturers Brake control system suppliers Freight train operators Passenger rail services Railway certification and safety authorities

Related Standards

  • UIC 541-01 Railway brakes — Braking power
  • UIC 541-05 Railway brakes — Anti-slide device
  • EN 14198 Railway applications — Wheelsets and bogies — Safety requirements for thermal management

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