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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UKAS 7914 Willsbridge, GB
5 of HSG 227 (2004)) (HSG 264, 2012)
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UKAS 1643 Chelmsford, GB
(cdt), Deletion an Pos 117 (HSG 248) – 2021 (PCM) based on HSG 248 BS 6068-4.12:1998 (withdrawn)
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CeGaT

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DAkkS D-ML-13206-01-01 Tübingen, DE
angeborener Chromosomensatz (Imbalancen im Genom, (Duplikationen/Del SNRPN-Region 15q11-13 UPD15 (UBE3A) SMN1; Spinale Muskelatrophie + 3 more
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Cenata

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DAkkS D-ML-21205-01-01 Tübingen, DE
Pränatales Screening auf Chromosomenstörungen (Trisomie 21, Trisomie 18, Trisomie 13, X0, XXX, XXY, XYY, XXYY, 22q11 (DiGe
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UKAS 0822 Southam, GB
Calibration of pressure Gas pressure (gauge) Gas Pressure (Differential) common mode pressure of 3.5 Hydraulic pressure (gauge) + 3 more
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DAkkS D-ML-13008-09-01 Berlin, DE
Whole genome sequencing (WGS: SNV, CNV/SV)
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DAkkS D-ML-13008-01-00 Berlin, DE
Thyreoidea stimulierendes (TSH) 17-α-OH-Progesteron (17-OH-P) Immunreaktives Trypsin + 3 more
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UKAS 0513 Coalville, GB
Liquid-in-glass thermometers ASTM D4052 (Digital density
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CheckImmune

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DAkkS D-ML-21360-01-00 Berlin, DE
Leukozytenzahl B-Zellzahl (Immunstatus Rezeptor-Besatz HLA-DR Leukozytensubpopulationen + 3 more
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Chelab

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ACCREDIA 00051 Resana, IT
ISO 9308-1 ISO 7899-2 ISO 17410 ISO 16266 ISO 19250 + 3 more
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DAkkS D-PL-14010-01-04 Bensheim, DE
DIN 38402-A 13 DIN ISO 5667-5 (A 14) DIN 38402-A 30 DIN 19643-1 ISO 5667-11 + 3 more
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UKAS 10148 Humanby, GB
Sound Calibrators Sound Level Meters One-third octave band filters
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UKAS 6536 Leicester, GB
(HSG 264, 2012) Appendix 5 of HSG 227 (2004))
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UKAS 9102 Bellshill, GB
(HSG 248) – 2021 SRV-002 based on HSG 248 (PCM) based on HSG 248
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UKAS 0318 Derby, GB
Chronic progressive external Depth Internal Dial gauges and dial test Caliper + 3 more
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Coesfeld

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DAkkS D-K-15093-01-00 Dortmund, DE
Kraft (WPM) Belastungseinrichtungen von Werkstoffprüfmaschinen Länge (WPM) 0,5 mm messeinrichtungen von + 3 more
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UKAS 0595 1 South Gyle Crescent, GB
simulation. parameters and ranges) digital and analogue
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Compli Group

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UKAS 4332 Poole, GB
DC CURRENT DC Resistance Oscilloscope Calibration DC VOLTAGE CAPACITANCE + 3 more
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DAkkS D-K-17132-01-00 Elsenfeld, DE
Messgeräte 0,001 V > 0,22 V > 2,2 V > 11 V > 22 V + 3 more
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DAkkS D-K-15160-01-00 St. Wendel, DE
Tensile testing of metallic materials (I Vickers hardness test (ISO 6507) Taupunkttemperatur Temperatur −40 °C Railway braking — urban guided transport + 3 more
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UKAS 4161 Leicester Forest East, GB
DIN EN 933-11 DIN EN 12390-3 DIN EN 933-3 DIN EN 12390-7 DIN EN 12697-5 + 3 more
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UKAS 0783 Duckmanton, GB
DC CURRENT LENGTH DC Resistance DC VOLTAGE Cold junction compensation + 3 more
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RvA I192 Zwolle, NL
DIN 10172-3 (CD45/CD19/CD5/CD20/CD23/CD20
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DAkkS D-ML-21351-01-00 Dubai, AE
Chloride Potassium Sodium Differential Blood Count White Blood Cell Count + 3 more
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Core Surveys

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UKAS 6830 Fletching Common, GB
(HSG 248) – 2021 (PCM) based on HSG 248 (HSG 264, 2012)
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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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