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
1,560 Accredited labs
17 Countries

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ENAC LE2422 Toledo, ES
UNE-EN 772-11 UNE 136029 DIN 4772:1979 DIN EN 16510-2-4 DIN EN 17539 + 3 more
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ACCREDIA 00365 Teramo, IT
ISO 5667-5 DIN EN 12457-2 ISO 18787 DIN EN ISO 6888-1 UNI 10802 + 3 more
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DAkkS D-K-19792-01-01 Alsdorf, DE
Gleichstromleistung / Messgeräte Wirkleistung Leistungsfaktor - Gleichspannung + 3 more
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ACCREDIA 02321 Roma, IT
IEC 15408-1 IEC 18045 IEC 18367 IEC 20543 IEC 20004
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COFRAC 1-2005 Firminy, FR
ASTM E8/E 8M DIN EN 10002-1 DIN EN 10002-5 DIN EN ISO 6892-2 DIN EN ISO 643 + 3 more
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COFRAC 1-1706 Rodez, FR
DIN EN ISO 14403-2 NF V 04-407 NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 + 3 more
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DAkkS D-K-20974-01-00 Cadolzburg, DE
Abgasmessgeräte für − Abgasmessgeräte für Fremdzündungsmotor Kohlenstoffmonoxid Kohlenstoffmonoxid CO Kohlenstoffdioxid CO2 + 3 more
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AVL IBERICA

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ENAC LC10.240 Valladolid, ES
CEM ME-003
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AWE

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UKAS 1854 Reading, GB
(HSG 248) – 2021 LQP007 based on HSG 248 LQP003 based on HSG 248 (PCM) based on HSG 248
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UKAS 0477 Gosport, GB
the guidance of GPG 14 PERSONAL DOSE EQUIVALENT: RESPONSE:
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UKAS 31383 Wakefield Europort, GB
TORQUE
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UKAS 0078 Portchester, GB
DC Resistance CFH-Gen, Macula-Degeneration DC RESISTANCE (continued) DC VOLTAGE DC VOLTAGE (continued) + 3 more
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UKAS 2418 Cleckheaton, GB
(HSG 248) – 2021 (PCM) based on HSG 248 staining based on HSG 248 (HSG 264, 2012) Appendix 5 of HSG 227
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UKAS 0483 Hemel Hempstead, GB
ISO 11654 BS EN ISO 10140-2:2021 ISO 7171 ISO 354 BS EN ISO 10140-3:2021 + 3 more
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UKAS 0653 Milton Keynes, GB
Sound Calibrators Pistonphones based: level Microphones + 2 more
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UKAS 8504 Glasgow, GB
(HSG 264:2012) HSG 227 Appendix 5: By HSG 227 Appendix 3: By
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UKAS 9064 Paignton, GB
DIN EN ISO 11127-6 DIN EN 13727 1) BS EN ISO 11930:2019+ 2) QMIC WI 22, based on BS EN
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DAkkS D-K-19342-01-02 Holzkirchen, DE
Taupunkttemperatur Railway braking — urban guided transport Temperaturtransmitter Widerstandssensor *) –30 °C + 3 more
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Air Surveys

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UKAS 0553 Wandsworth, GB
(HSG 248) – 2021 APP 7 based on HSG 248 (PCM) based on HSG 248 (PCM) based on HSG 248) APP 15 based on HSG 248 + 2 more
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UKAS 0232 Manchester, GB
(HSG 264, 2012)
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UKAS 2054 Manchester, GB
(HSG 248) – 2021 AEC 1 based on HSG 248 (PCM) based on HSG 248 AEC 6 based on HSG 248
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DAkkS D-K-18731-01-01 Manching, DE
- Gleichspannung / Messgeräte 1 µV Quellen > 1 V + 3 more
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UKAS 4376 Alton, GB
(HSG 248) – 2021 (PCM) based on HSG 248
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UKAS 0681 Writtle, GB
(HSG 248) – 2021 (PCM) based on HSG 248 staining based on HSG 248 (HSG 264, 2012) Appendix 5 of HSG 227 (2004))
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UKAS 1765 Kilmarnock, GB
BS ISO 18283:2022 ASTM D2234 (location E) ASTM D2013 (location B) BS ISO 5074:2015; and ASTM D409:2016 + 3 more
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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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