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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London Laboratories

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UKAS 9681 Hextable, GB
(HSG 248) – 2021 ASB04 based on HSG 248 (PCM) based on HSG 248
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Lucion Services

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UKAS 2569 Gateshead, GB
staining based on HSG 248 (HSG 248) – 2021 (PCM) based on HSG 248 3492, ISO14966 and HSG 248 DIN EN 14629 + 3 more
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Ludwig Schneider Messtechnik

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DAkkS D-K-15223-01-00 Wertheim, DE
Taupunkttemperatur Fixpunktzellen *) thermometer (SPRT) *) meter, direkt anzeigende thermometer und + 3 more
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Ludwig-Maximilians-Universität München Max von Pettenkofer-Institut Lehrstuhl für Medizinische Mikrobiologie und Krankenhaushygiene

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DAkkS D-ML-14413-03-01 München, DE
Cryptococcus neoformans Cardiolipin AK Escherichia coli K1-AG Haemophilus influenzae Metromec Software AG + 3 more
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M E Broadstone Limited

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UKAS 0227 Poole, GB
Plain ring gauges (taper) Plain gap gauges (parallel) Plain plug gauges (taper) LENGTH ANGLE + 3 more
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MBS

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DAkkS D-PL-12159-01-00 Krefeld, DE
DIN EN ISO 16484-5 DIN EN ISO 16484-6 IEC 62386-101 IEC 62386-102 IEC 62386-103 + 3 more
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MCV

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ENAC LC10.124 Collbató, ES
0,005 l/min ≤ Q ≤ 50 l/min 0,5 m3/h≤ Q ≤ 2,8 m3/h 0,6 m3/h  Q  2,8 m3/h 20 m3/h  Q  30 m3/h 30 m3/h < Q  70 m3/h + 3 more
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MD ELEKTRONIK GmbH MD Test Laboratory (Prüflabor)

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DAkkS D-PL-19548-01-03 Waldkraiburg, DE
DIN EN 13018 DIN EN 50289-1-2 DIN EN 50289-1-3 DIN EN 50289-1-4 DIN EN 50289-1-5 + 3 more
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MDI Limbach Berlin

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DAkkS D-ML-13341-01-01 Berlin, DE
17-OH-Carbazepin Amiodaron, Desmethylamiodaron Amitriptylin Clobazam Clomipramin + 3 more
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ME-Meßsysteme

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DAkkS D-K-21980-02-01 Hennigsdorf, DE
Kraft 50 N Sound power — survey method (ISO 3746) > 200 N Railway brake — automatic variable load 0,2 kN + 1 more
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MESA Meß- und Regeltechnik Vertriebs- und Service

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DAkkS D-K-20515-01-00 Filderstadt, DE
Temperaturmessgrößen auch direktanzeigend 35 °C direktanzeigende > 200 °C auch direktanzeigend Temperaturmessgrößen −35 °C + 3 more
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MESSRING

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DAkkS D-K-22828-01-01 Ingolstadt, DE
Kraft Gurtkraftaufnehmer Railway brake — disc brake components (U
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METER UNDER TEST

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ENAC LC10.163 Badalona, ES
Rangos de caudal (m3/h): 1 m3/h ≤ Q < 25
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METROCAL CALIBRACIÓN

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ENAC LC10.236 San Ginés, ES
1 g 2 g 5 g 10 g 20 g 50 g 100 g 200 g 5 5 kg 10 kg 20 kg 100 kg 200 kg 500 kg 1000 kg 1 g 2 g 5 g 10 g 20 g 50 g 100 g 200 g 5 + 2 more
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METROPACK

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COFRAC 1-6986 Reims, FR
ISO 11607-1 ASTM F1886 BS EN ISO 11607-1:2020+A11 NF EN 868-5 annexe D ASTM F88 DIN EN 12758 + 3 more
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MINISTERO DELLA DIFESA - DIREZIONE GENERALE DI COMMISSARIATO E DI SERVIZI GENERALI UFFICIO TECNICO TERRITORIALE DI NAPOLI

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ACCREDIA 00540 Napoli, IT
DIN EN ISO 12945-2 DIN EN ISO 5403-1 DIN EN ISO 2060 DIN EN ISO 13937-1 DIN EN ISO 11642 + 3 more
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MITSUBISHI ELECTRIC EUROPE BV

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COFRAC 1-7500 Nanterre, FR
DIN EN 14511-2 DIN EN 14511-3 DIN EN 14511-4 DIN EN 14825 NF EN 16147
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MK-Kalibrierlabor

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DAkkS D-K-18366-01-01 Schweinfurt, DE
1350 mm Innen- und Tiefenmaße * > 300 mm Tiefenmessschieber * 0 mm Höhenmessschieber * 0 mm + 3 more
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MLL MVZ

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DAkkS D-ML-13228-01-00 München, DE
Berliner-Blau-Reaktion Naphthylacetat-Esterase Pappenheim-Färbung Peroxidase-Reaktion Schnellfärbung (Diff-Quick) + 3 more
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MLM MEDICAL LABS

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DAkkS D-ML-13178-01-01 Mönchengladbach, DE
CRP Cystatin C HbA1c Großes Blutbild Kleines Blutbild + 3 more
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MP Calibration Services

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UKAS 0228 Wimborne, GB
Plain plug gauges (parallel) length bars) LENGTH (continued) Micrometers (enzephalomyopathische Form + 3 more
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MPA Eberswalde Materialprüfanstalt Brandenburg GmbH Prüflabor

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DAkkS D-PL-11241-01-01 Eberswalde, DE
DIN EN 50178: 1998 DIN EN ISO 2813 DIN EN ISO 4628-4 DIN EN ISO 10456 DIN EN ISO 12572 + 3 more
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MPA Kalibrierdienst

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DAkkS D-K-17552-01-01 Berlin, DE
Drehmoment * 0,2 N∙m > 10 N∙m bis Kalibriereinrichtungen > 100 N∙m Drehmomentschlüssel, 0,2 N∙m + 3 more
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MR COMP

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DAkkS D-PL-13383-01-00 Gelsenkirchen, DE
IEC 62570 DIN 13273-7
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MS Laboratories

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UKAS 1625 Wellingborough, GB
on BS 4401:Part 3:1970(1986) ISO 936:1998 BS ISO 21528-2:2017 BS ISO 16649-2:2001 ISO 6888-1 + 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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