ISO 24221:2024

Railway applications — Braking system — General requirements

ISO 24221:2024

Name:ISO 24221:2024   Standard name:Railway applications — Braking system — General requirements
Standard number:ISO 24221:2024   language:English language
Release Date:07-Mar-2024   technical committee:ISO/TC 269/SC 2 - Rolling stock
Drafting committee:ISO/TC 269/SC 2/WG 1 - Railway braking   ICS number:45.060.01 - Railway rolling stock in general
International
Standard
ISO 24221
First edition
Railway applications — Braking
2024-03
system — General requirements
Applications ferroviaires — Système de freinage — Exigences
générales
Reference number
ISO 24221:2024(en) © ISO 2024

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ISO 24221:2024(en)
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Published in Switzerland

© ISO 2024 – All rights reserved
ii

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ISO 24221:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Design requirements . 2
4.1 General requirements of the brake systems .2
4.2 General safety requirements .3
4.3 Requirements for the main brake system .3
4.3.1 General requirements .3
4.3.2 General functions on train level .5
4.3.3 Additional requirements at the vehicle level .7
4.4 Brake management / brake blending .8
4.5 Additional brake systems .9
4.5.1 General .9
4.5.2 Independent dynamic braking .9
4.5.3 Independent direct brake for locomotives and traction units.9
4.6 Wheel slide protection .11
4.7 Enhancement of wheel/rail adhesion . 13
4.8 Compatibility for rescue purposes . 13
5 Calculation requirements .
...

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