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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Oracle Solutions Asbestos

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UKAS 4600 Kettering, GB
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Ostthüringische Materialprüfgesellschaft für Textil und Kunststoffe mbH Rudolstadt (OMPG)

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DAkkS D-PL-11118-01-01 Rudolstadt, DE
DIN EN 1264-5 DIN EN 13647 DIN EN 71-10 DIN EN 50642 DIN EN ISO 14184-2 + 3 more
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Oxford Technical Solutions

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UKAS 4647 Upper Heyford, GB
UNITS
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P & B INSTRUMENTS TÉCNICAS DE MEDIDA Y CONTROL

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ENAC LC10.126 Sant Fruitós de Bages, ES
CEM ME-003
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PA Group (UK)

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UKAS 4265 Dartford, GB
(HSG 264, 2012)
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PETROLAB GmbH Laboratorium für Mineralöl- und Umweltanalytik

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DIN EN ISO 12185 ASTM D 4052 DIN EN ISO 3405 ASTM D 86 DIN EN 13016-1 + 3 more
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PHH Environmental (UK)

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UKAS 0384 Cardiff, GB
HSG 227 (2004)) (HSG 264, 2012) HSG 264 (2012) and Appx. 3 of (HSG 248) – 2021 (PCM) based on HSG 248
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PHOENIX TESTLAB

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DAkkS D-PL-17186-01-01 Blomberg, DE
IEC 61000-4-2: 2008 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 IEC 61000-4-6: 2013 + 3 more
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PID test & engineering

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DAkkS D-PL-21530-01-01 Sand am Main, DE
DIN EN IEC 60068-2-38 DIN EN IEC 60068-2-11 BS ISO 9227:2022 DIN EN 60068-2-14 IEC 60068-2-60 + 3 more
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DAkkS D-PL-22217-01-00 Neu-Eichenberg, DE
DIN EN 12457-4 DIN EN 12579 DIN EN 13040 DIN EN ISO 10523 (C 5) DIN EN 12880 (S 2a) + 3 more
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PMK - GmbH (Prüfen+Messen+Kalibrieren)

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DAkkS D-K-17519-01-01 Niestetal, DE
Parallelendmaße aus 0,5 mm Einstellringe aus Stahl * nach DIN EN ISO 3650:1999 Keramik * DIN EN ISO 3650:1999 + 3 more
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PRELEVAIR

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COFRAC 1-5948 Cognac, FR
NF X 43-269 NF X 43-269 - Annexe K NF X43-050 (parties utiles de NF X 43-050 ISO 16000-7
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PRO' AIR

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COFRAC 1-5789 Montois-La-Montagne, FR
NF X 43-269 NF X 43-269 - Annexe K NF X43-050 (parties utiles de NF X 43-050 ISO 16000-7
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COFRAC 1-5987 263, 3Eme Etage Zone Industrielle De Mohammedia | - Mohammedia | Maroc, MA
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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PRODUCTOS AGROVIN

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ENAC LE2092 Alcázar de San Juan, ES
UNE-EN ISO/IEC 17025
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PROMESS Gesellschaft für Montage- und Prüfsysteme

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DAkkS D-K-21209-02-00 Berlin, DE
Railway brake — magnetic track brakes (U − Kraft (WPM) nur Vor-Ort-Kalibrierungen Kraft (WPM) 0,1 kN Vibration measuring instruments — test m + 3 more
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PRS LAB srl Unipersonale - Sede di Faloppio

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ACCREDIA 00983 Faloppio, IT
IEC 60730-1: 2013 DIN EN 60730-2-8 IEC 61000-6-1 DIN EN 50131-2-3 DIN EN 60730-2-9 + 3 more
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PTS - Institut für Fasern & Papier g

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DAkkS D-PL-23019-01-01 Heidenau, DE
rs11887534 HABP2-Gen (c.1601G>A) rs7080536 IEC 61924-2 DIN EN ISO 1974 DIN 53121 + 3 more
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PTW - Freiburg Physikalisch-Technische Werkstätten Pychlau

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DAkkS D-K-15059-01-00 Freiburg im Breisgau, DE
Dosimetrie Luftkerma 5 mGy 2 mGy 100 µGy + 3 more
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Pachmann

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DAkkS D-ML-13345-01-00 Bayreuth, DE
EpCAM-positive Zellen (CD326) EpCAM-positive Tumorsphären EpCAM-positive Zellen human epidermal growth receptor 2 (Her-2/neu) + 2 more
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Paragon Scientific

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UKAS 0649 Prenton, GB
Refractive Index Capillary Viscometer Calibration 2.92 mm systems (continued) Liquids Density in Air at 20 + 3 more
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Particle Technology

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UKAS 4109 Hatton, GB
MIL-STD 810D, Method 510.2 MIL-STD 810E, Method 510.3 MIL-STD 810G:2008 Method 501.5 MIL-STD 810F, Method 510.4 MIL-STD-810H, Method 510.7 + 3 more
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Partnerschaftspraxis für Laboratoriumsmedizin und Mikrobiologie

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DAkkS D-ML-13116-01-01 Hameln, DE
Hämoglobin Selen Lithium Zink Eisen, Kupfer + 3 more
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Pattinson Scientific Services

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UKAS 0307 Newcastle-upon-Tyne, GB
(HSG 264, 2012)
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Pattinson Scientific Services

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UKAS 0635 Newcastle-upon-Tyne, GB
(HSG 248) – 2021 (PCM) based on HSG 248
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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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