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 326โ€“344 of 344 labs

UKAS 0125 Blaby, GB
Chronic progressive external LENGTH Micrometer heads Dial gauges and dial test Depth + 3 more
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UKAS 1660 Salford, GB
DIN EN 12667 ISO 8301 DIN EN 12939 DIN EN 12664 DIN EN ISO 13163 + 3 more
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UKAS 0801 The Crescent, GB
Pistonphones Microphones LS2/WS2 microphones based: Reverberation Time
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UKAS 1634 Whitley Bay, GB
(HSG 248) โ€“ 2021 ASB/10 based on HSG 248 (PCM) based on HSG 248 ASB/6 based on HSG 248 BS EN ISO 14644-1:2015 + 3 more
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UKAS 0593 Lutterworth, GB
TEMPERATURE parameters and ranges) indicators or recorders WEIGHING INSTRUMENTS
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Vantify

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UKAS 7892 Stoke Prior, GB
Appendix 5 of HSG 227 (2004) (HSG 264, 2012)
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UKAS 10213 Bishops Stortford, GB
(HSG 264:2012) 5 of HSG 227 (2004))
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UKAS 1249 Garston, GB
(HSG 248) โ€“ 2021 (PCM) based on HSG 248 P052 based on HSG 248
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W H Stephens

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UKAS 7855 Belfast, GB
(HSG 264, 2012)
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WSP UK

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UKAS 2538 London, GB
(HSG 248) โ€“ 2021 AFC based on HSG 248 (PCM) based on HSG 248 SSA based on HSG 248
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UKAS 20481 Winterborne Zelston, GB
TEMPERATURE controllers, and recorders) RELATIVE HUMIDITY
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UKAS 21065 Cleckheaton, GB
Analystsโ€™ Guide (HSG 248) (PCM) based on HSG 248 staining based on HSG 248
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UKAS 7567 Newcastle-Under-Lyme, GB
(HSG 248) โ€“ 2021 SOP 12 based on HSG 248 (PCM) based on HSG 248 SOP 11 based on HSG 248
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UKAS 1830 Callington, GB
ISO 21528-2 BS ISO 4832:2006 BS ISO 16649-2:2001 Method No 2.9 based on BS EN ISO Method No 2.12 based on BS EN + 3 more
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UKAS 21819 Birchwood, GB
BS 1377-2:2022 BS 1377-9:1990 DIN EN 1097-5 BS EN ISO 17892-1:2014+A1:2022 purposes (BS 1377-2:2022
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Winkhaus (UK)

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UKAS 1989 Kettering, GB
DIN EN 12046-2 DIN EN 12094-8 DIN EN 949 BS 6375-2:2009 DIN EN 950 + 3 more
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Wood Group UK

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UKAS 4482 Glasgow, GB
IEC 61400-12-1 IEC 61400-12-3 IEC 61400-50 IEC 61400-12 IEC 61400-50-2 + 3 more
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i2 FAST

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UKAS 10852 Hemel Hempstead, GB
BS 4401-1:1998 Using N008-1 based on BS EN ISO 12966-4 2015 N008-2 based on BS EN N011 based on BS 4401-9:1975 and BS 770- + 3 more
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UKAS 1916 Hebden Bridge, GB
on BS 4401:Part 3:1970(1986) ISO 12966-1:2014 and ISO 12966-4 CH 4026 based on BS 5766:Part CH 4001 based on BS EN 12014- + 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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