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

Showing 1–25 of 1,560 labs

Techmetrics

DAkkS Professional D-K-22606-01-01 Winnenden, DE

absolute Feuchte Taupunkttemperatur Taupunktspiegel Taupunkttransmitter Railway bogies — wheelsets and bogies st + 3 more

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1A CAL

DAkkS D-K-15115-01-00 Kassel, DE

- Gleichspannung Josephson-Josephson Multimeter Quellen > 0,2 V Spannungsnormale + 3 more

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20/30 Labs

UKAS 4236 Northampton, GB

cartridges, based on HTM 2030 9.201 to 9.212 and BS EN ISO 35 °C/3 days based on HTM 2030 section 9.201 to 9.212, BS EN ISO 15883-1:2009 6.4.2.3 and + 3 more

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3D Service

DAkkS D-K-18164-01-00 Partenstein, DE

Metrologic, Software von Metrologic Group ≤ 9090 mm CAM 2, Software von Münchingen, D Chur, CH, ≤ 5000 mm + 3 more

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4-RAIL Services

UKAS 0173 London, GB

(HSG 264, 2012)

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4-RAIL Services

UKAS 1931 London, GB

(HSG 248) – 2021 E203 based on HSG 248 (PCM) based on HSG 248 E200 based on HSG 248 E201 based ISO 14966:2019 using + 1 more

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5D Compliance

UKAS 9372 West Chiltington, GB

(HSG 264, 2012)

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8tree GmbH 8tree Calibration Lab

DAkkS D-K-21981-01-00 Konstanz, DE

8tree Scanner / 0 mm bis 100 mm Laterale Größe von Tiefenmaß/ -unterstand (Härteskalen HV0,01

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A & B KMG Service

DAkkS D-K-21221-01-00 Altenbuch, DE

Vickers hardness test (ISO 6507) Koordinatenmessgeräte Koordinatenmessger Steuerungssoftware Messvolumen mit einer Metromec CM, Software Raumdiagonale von von Metromec Software ≤ 750 mm + 3 more

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