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
๐Ÿ‡ฉ๐Ÿ‡ช DIN EN 14198 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN 14198 ๐Ÿ‡ซ๐Ÿ‡ท NF EN 14198 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN 14198 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN 14198 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN 14198
1,560 Accredited labs
17 Countries

Showing 301โ€“325 of 344 labs

UKAS 8644 Bury, GB
(HSG 264, 2012) HSG 264 (2012) and Appx. 3 of HSG 227 (2004))
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TVS Analysis

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UKAS 2684 Birchwood, GB
(HSG 248) โ€“ 2021 (PCM) based on HSG 248
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TYSR Analysis

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UKAS 31733 Chorley, GB
(HSG 248) โ€“ 2021 QSOP 01 based on HSG 248
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UKAS 0805 Ramsdell, GB
RELATIVE HUMIDITY HUMIDITY continued loggers Gas Pressure Gauge Saturated salt capsules + 2 more
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UKAS 0175 London, GB
(HSG 264, 2012) Appendix 5 of HSG 227 (2004))
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UKAS 1709 London, GB
(HSG 248) โ€“ 2021 RPSCA1 based on HSG 248 (PCM) based on HSG 248 RPSCA2 based on HSG 248 BS 7592:2008, BS 8554:2015 + 2 more
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Tetra Tech

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UKAS 6060 Leeds, GB
(HSG 248) โ€“ 2021 &10 based on HSG 248 (PCM) based on HSG 248
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UKAS 20765 High Wycombe, GB
DC CURRENT DC Resistance Measurement DC VOLTAGE CAPACITANCE + 3 more
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UKAS 0225 Fenstanton, GB
(HSG 264, 2012)
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UKAS 0575 Fenstanton, GB
(HSG 248) โ€“ 2021 03 based on HSG 248) QOP01 based on HSG 248 (PCM) based on HSG 248
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UKAS 4699 New Milton, GB
LENGTH Screw ring gauges (parallel) LENGTH cont. As for Involute Spline Gauges See Note 2 + 3 more
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UKAS 7758 Doncaster, GB
DIN EN 933-11 BS EN ISO 17892-1:2014+A1:2022 BS EN ISO 17892-10:2018 BS EN ISO 17892-11:2019 BS EN ISO 17892-2:2014 + 3 more
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UKAS 0630 Amesbury, GB
SPECTRAL TRANSMITTANCE Wavelength 380 nm materials
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UKAS 9951 Filton, GB
LENGTH
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Thomas Dudley

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UKAS 20013 Dudley, GB
BS 1212-2:1990 Clause 4 BS 1212-3:1990 Clause 4 DIN EN 997 Laktoseintoleranz (LCT -14055 BS 1212-4:1991 Clause 4, 13, 14
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UKAS 0249 Kenilworth, GB
LENGTH LENGTH (contโ€™d)
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Torquemeters

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UKAS 6772 Ravensthorpe, GB
ELECTRICAL TORQUE
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UKAS 27642 Somerset, GB
ISO 14644-3 BS EN ISO 14644-2:2015:Part 2 DIN EN 12469 BS EN ISO 14644-1:2015 BS EN ISO 14644-4:2022 + 3 more
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UKAS 8188 Sunderland, GB
Analystsโ€™ Guide (HSG 248) (PCM) based on HSG 248
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UKAS 0716 Gorton, GB
including dial and digital LENGTH (contโ€™d) Plain plug gauges (taper) ANCILLARY MEASUREMENTS Plain ring gauges (taper) + 3 more
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UKAS 0566 Jarrow, GB
Micrometers See Notes 3 and 5 See Note 6 Caliper length bars) โ€“ See Note 5 + 3 more
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UKAS 1645 London, GB
FNED142 BS EN ISO 11816- FNES67 (P1) based on BS EN ISO FNES16 (F13) based on ISO 6579-1:2017+A1 FNES16 (F13) based on BS EN ISO 6579-1 + 3 more
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UKAS 5772 Basingstoke, GB
DIN EN 12209 DIN EN 1155 DIN EN 12179 DIN EN 1935 DIN EN 1670 + 3 more
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UL VS

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UKAS 0224 Finchampstead, GB
(HSG 264, 2012) and Appx. 3 of HSG 227 (2004)) guides HSG 264 (2012) and ACoP L8 and BS 8580-1:2019
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UKAS 2200 Ratcliffe-on-Soar, GB
DIN EN 13284-1 BS EN ISO 23210:2009 requirements of BS EN 14181:2014 IEC 60519-11 requirements of BS EN + 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 โ€” Braking power
  • UIC 541-05 Railway brakes โ€” Anti-slide device
  • EN 14198 Railway applications โ€” Wheelsets and bogies โ€” Safety requirements for thermal management

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