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
1,323 Accredited labs
15 Countries

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DAkkS D-K-22378-01-01 Mühldorf a. Inn, DE
Tensile testing of metallic materials (I Vickers hardness test (ISO 6507) Kraft Railway vehicles — specific test require Railway — traction effort and braking fo + 3 more
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CBRE GWS Industrial Services GmbH Kalibrierlabor

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DAkkS D-K-15125-01-01 Lorsch, DE
Charpy impact test (ISO 148-1) Salt spray / neutral salt fog test (ISO elektronische Waagen Railway bogies — wheelsets and bogies st Datenlogger mit + 3 more
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CENTROCAL

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DAkkS D-K-17734-01-01 Werne, DE
Taupunkttemperatur Railway brake handbooks (UIC 547) (SPRT) –40 °C > –20 °C + 3 more
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CERTIFER Deutschland GmbH CERTIFER Prüfstelle für Schienenfahrzeuge

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DAkkS D-PL-11312-01-00 Nürnberg, DE
DIN EN 16334 EN 50128 EN 50129 DIN EN 50215 EN 50657 + 3 more
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CETA Testsysteme

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Druck * > –0,12 bar bis negativer und positiver Überdruck p e > –0,01 bar bis > 0,03 bar bis + 3 more
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CEcert

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DAkkS D-PL-12049-01-02 Wismar, DE
IEC 61000-4-2: 2008 EN IEC 61000-4 IEC 61000-4-3: 2006 IEC 61000-4-4: 2012 IEC 61000-4-5: 2005 + 3 more
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COAGUMED Gerinnungszentrum

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DAkkS D-ML-21581-01-00 Berlin, DE
Thrombozytenaggregationstest Blutbild mit Vordifferenzierung Calcium Natriumchlorid Kalium + 3 more
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COMPRION GmbH Prüf- und Kalibrierlabor

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DAkkS D-K-19708-01-00 Paderborn, DE
- Gleichspannung Quellen > 0,10 V > 1 V > 10 V - Gleichstromstärke + 3 more
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CTK-Poliklinik

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DAkkS D-ML-13325-01-00 Cottbus, DE
Oligosaccharide Chromatographie (Gaschromatograpie Cannabinoide (THC-COOH) Amphetamine Opiate + 3 more
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CTS Clima Temperatur Systeme

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DAkkS D-K-18066-01-00 Hechingen, DE
Vickers hardness test (ISO 6507) Temperaturmessgrößen –70 °C Railway braking — urban guided transport Thermometer mit > –40 °C Widerstandssensor * + 3 more
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Carl Zeiss

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DAkkS D-PL-12125-01-01 Oberkochen, DE
DIN EN 60601-1 IEC 60601-1 DIN EN 60601-1-1 IEC 60601-1-1 IEC 80601-2-77 + 3 more
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Carl Zeiss IQS Deutschland

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DAkkS D-K-21703-01-00 Oberkochen, DE
Carl Zeiss Industrielle ≤ 3818 mm Oberkochen, D 1) In den CMC sind die erweiterten Messu Carl Zeiss Industrielle ≤ 20 m Auswertesoftware Messvolumen mit + 3 more
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Carl Zeiss Industrielle Messtechnik

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DAkkS D-K-15007-01-01 Oberkochen, DE
Parallelendmaße 50 mm DIN EN ISO 3650:1999 Thermischer Ausdeh- Maximale Dimension Bandbreite Höhe: 80 mm + 3 more
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Carl Zeiss Jena

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DAkkS D-PL-12037-01-02 Jena, DE
DIN EN 61010-1 VDE 0411-1 IEC 61010-1 : 2010 DIN EN 60825-1 VDE 0837 + 3 more
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Carl Zeiss Jena GmbH Kompetenzzentrum Qualität/Kalibrierlabor

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DAkkS D-K-12037-01-01 Jena, DE
Parallelendmaße * 0,5 mm DIN EN ISO 3650:1999 Parallelendmaße * 40 mm Parallelendmaße * ≥ 100 mm Strichmaßstäbe 0 mm + 3 more
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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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Charité - Universitätsmedizin Berlin Institut für Pathologie

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DAkkS D-ML-13008-09-01 Berlin, DE
Whole genome sequencing (WGS: SNV, CNV/SV)
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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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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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ConCert Servicezentrum Bayerischer Untermain

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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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Conatex Ludwig Colbus

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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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Coretec - Service

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DAkkS D-K-21661-01-00 Linden, DE
Absolutdruck Positiver und negativer -3,92 kPa 4,02 kPa Railway brakes — brake performance (UIC Lungensimulator
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DB Systemtechnik GmbH Messprozesse, Kalibrier- und Prüfstelle

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DAkkS D-K-11081-02-01 Chemnitz, DE
Parallelendmaße * 0,5 mm DIN EN ISO 3650:1999 auch Vor-Ort Kalibrierung bahntypischer –0,26 mm + 3 more
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DBI - Gastechnologisches Institut gGmbH Freiberg DVGW-Prüflaboratorium Energie

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DAkkS D-PL-11072-01-01 Freiberg, DE
DIN EN ISO 9012 ISO 22967 ISO 22968 (SPG42), SPAST (SPG4), SPG11, SPG7, VAMP DIN EN 30-1-1 + 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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