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ISO 7176-21:2025

(Main)

Wheelchairs — Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers

Wheelchairs — Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers

This document specifies requirements and test methods for electromagnetic emissions and for electromagnetic immunity of electrically powered wheelchairs and scooters, intended for indoor or outdoor use, or both, by people with disabilities. It is also applicable to manual wheelchairs with an add-on power kit. It is not applicable to vehicles designed to carry more than one person. This document also specifies requirements and test methods for the electromagnetic compatibility of battery chargers intended for use with electrically powered wheelchairs and scooters. A reference configuration is specified for adjustable wheelchairs and scooters in order to enable test results to be used for comparison of performance.

Fauteuils roulants — Partie 21: Exigences et méthodes d'essai pour la compatibilité des fauteuils roulants électriques et scooters motorisés

General Information

Status
Published
Publication Date
24-Apr-2025
ICS
11.180.10 - Aids and adaptation for moving
33.100.01 - Electromagnetic compatibility in general
Technical Committee
ISO/TC 173/SC 1 - Wheelchairs
Drafting Committee
ISO/TC 173/SC 1 - Wheelchairs
Current Stage
6060 - International Standard published
Start Date
25-Apr-2025
Due Date
15-Feb-2025
Completion Date
25-Apr-2025
Ref Project

Relations

Revises
ISO 7176-21:2009 - Wheelchairs — Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers
Effective Date
06-Jun-2022

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ISO 7176-21:2025 - Wheelchairs — Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers Released:25. 04. 2025ISO 7176-21:2025 - Wheelchairs — Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers Released:25. 04. 2025
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ISO 7176-21:2025 - Wheelchairs — Part 21: Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers Released:25. 04. 2025
English language
22 pages
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Standards Content (Sample)


International
Standard
ISO 7176-21
Third edition
Wheelchairs —
2025-04
Part 21:
Requirements and test methods for
electromagnetic compatibility of
electrically powered wheelchairs
and scooters, and battery chargers
Fauteuils roulants —
Partie 21: Exigences et méthodes d'essai pour la compatibilité des
fauteuils roulants électriques et scooters motorisés
Reference number
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification of electrically powered wheelchairs . 4
5 Requirements . 4
5.1 General .4
5.2 Wheelchair drives .5
5.2.1 Radiated emissions .5
5.2.2 Electrostatic discharge (ESD) immunity .5
5.2.3 Radiated radio frequency field immunity .5
5.2.4 Power frequency magnetic field immunity .5
5.2.5 Stability of speed and direction .6
5.3 Wheelchairs with an on-board battery charger .6
5.3.1 Mains terminal disturbances .6
5.3.2 Radiated emissions .6
5.3.3 Harmonic current emissions .6
5.3.4 Voltage fluctuations and flicker .6
5.3.5 Electrostatic discharge immunity .6
5.3.6 Radiated radio frequency field immunity .7
5.3.7 Fast transient/burst immunity .7
5.3.8 Surge immunity .7
5.3.9 Conducted disturbance immunity .8
5.3.10 Voltage dips and short interruptions immunity .8
5.4 Off-board and carry-on battery chargers .8
5.4.1 Mains terminal disturbances .8
5.4.2 Radiated emissions .8
5.4.3 Harmonic current emissions .8
5.4.4 Voltage fluctuations and flicker .9
5.4.5 Electrostatic discharge immunity .9
5.4.6 Radiated radio frequency field immunity .9
5.4.7 Fast transient/burst immunity .9
5.4.8 Surge immunity .9
5.4.9 Conducted disturbance immunity .9
5.4.10 Voltage dips and short interruptions immunity .9
6 Test apparatus .10
7 Preparation .11
7.1 Wheelchairs – driving .11
7.1.1 Set-up .11
7.1.2 Operation .11
7.2 Wheelchairs – non-driving .11
7.3 Wheelchairs with on-board battery chargers .11
7.4 Off-board and carry-on battery chargers .11
8 Sequence of tests .12
9 Test methods for emissions .12
9.1 Mains terminal disturbances . 12
9.1.1 Wheelchairs with an on-board battery charger . 12
9.1.2 Off-board and carry-on battery chargers . 12
9.2 Radiated emissions . 12
9.2.1 Wheelchair drives . 12

iii
9.2.2 Wheelchairs with an on-board battery charger . 12
9.2.3 Off-board and carry-on battery chargers . 13
9.3 Harmonic current emissions . . 13
9.3.1 Wheelchairs with an on-board battery charger . 13
9.3.2 Off-board and carry-on battery chargers . 13
9.4 Voltage fluctuations and flicker . 13
9.4.1 Wheelchairs with an on-board battery charger . 13
9.4.2 Off-board and carry-on battery chargers . 13
10 Test methods for immunity .13
10.1 Electrostatic discharge immunity. 13
10.1.1 Wheelchair drives . 13
10.1.2 Wheelchairs with an on-board battery charger .14
10.1.3 Off-board and carry-on battery chargers . 15
10.2 Radiated radio frequency field immunity . 15
10.2.1 Wheelchair drives . 15
10.2.2 Wheelchairs with an on-board battery charger .16
10.2.3 Off-board and carry-on battery chargers .17
10.3 Fast transient/burst immunity .17
10.3.1 Wheelchairs with an on-board battery charger .17
10.3.2 Off-board and carry-on battery chargers .17
10.4 Surge immunity .18
10.4.1 Wheelchairs with an on-board battery charger .18
10.4.2 Off-board and carry-on battery chargers .
...

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