IEC 62246-4:2023

IEC 62246-4
®

Edition 1.0 2023-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Reed switches –
Part 4: Application in conjunction with magnetic actuator used for magnetic
sensing devices

Contacts à lames souples –
Partie 4: Application en combinaison avec un actionneur magnétique utilisé
pour les dispositifs de détection magnétiques

IEC 62246-4:2023-02(en-fr)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2023 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.


Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland

About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.

Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.


A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Découvrez notre puissant moteur de recherche et consultez
webstore.iec.ch/advsearchform gratuitement tous les aperçus des publications. Avec un
La recherche avancée permet de trouver des publications IEC abonnement, vous aurez toujours accès à un contenu à jour
en utilisant différents critères (numéro de référence, texte, adapté à vos besoins.
comité d’études, …). Elle donne aussi des informations sur les
projets et les publications remplacées ou retirées. Electropedia - www.electropedia.org

Le premier dictionnaire d'électrotechnologie en ligne au monde,
IEC Just Published - webstore.iec.ch/justpublished
avec plus de 22 300 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 19 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
Disponible en ligne et une fois par mois par email.
Electrotechnique International (IEV) en ligne.


Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC Products & Services Portal - products.iec.ch

---------------------- Page: 2 ----------------------
IEC 62246-4

®


Edition 1.0 2023-02




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Reed switches –

Part 4: Application in conjunction with magnetic actuator used for magnetic

sensing devices



Contacts à lames souples –

Partie 4: Application en combinaison avec un actionneur magnétique utilisé


pour les dispositifs de détection magnétiques













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.120.70 ISBN 978-2-8322-6469-0




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 3 ----------------------
– 2 – IEC 62246-4:2023 © IEC 2023
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 12
3.1 Types of magnetic-sensing device (MSD) . 12
3.2 Elements of an MSD . 14
3.3 Connections . 14
3.4 Operation of an MSD . 14
4 Influence quantities . 15
5 Rated values . 16
5.1 General . 16
5.2 Rated insulation voltage (U ) . 16
i
5.3 Rated operating voltage (U ) . 16
e
5.4 Rated operating current (I ) . 17
e
5.5 Contact ratings . 17
5.6 Number of operations. 17
5.7 Rated operating distance (S ) . 17
n
5.8 Climatic category . 17
5.9 Environmental severities . 17
5.10 Response speed . 18
5.11 Frequency of operating cycles . 18
5.12 Contact reliability . 18
6 Types . 18
7 General provisions for testing . 20
7.1 General . 20
7.2 Type tests . 20
7.3 Routine tests. 21
7.4 Special tests . 22
8 Documentation and marking . 22
8.1 Data . 22
8.2 Marking . 24
8.3 Symbols . 24
9 Test and measurement procedures . 25
9.1 General . 25
9.2 Visual inspection and check of dimensions . 25
9.2.1 Visual inspection . 25
9.2.2 Outline dimensions . 25
9.2.3 Mass . 25
9.3 Functional tests . 26
9.3.1 General . 26
9.3.2 Operating distance . 26
9.3.3 Deviation of operating distance . 26
9.3.4 Differential travel (H) . 26
9.3.5 Repeatability (R) . 27

---------------------- Page: 4 ----------------------
IEC 62246-4:2023 © IEC 2023 – 3 –
9.3.6 Magnetic interference . 27
9.3.7 Response speed (if applicable) . 27
9.3.8 Frequency of operating cycles (f) (if applicable) . 29
9.3.9 Functional test by temperature change . 31
9.3.10 Contact circuit resistance . 32
9.3.11 Temperature rise . 32
9.4 Insulation resistance . 32
9.4.1 Procedures . 32
9.4.2 Requirements . 33
9.5 Dielectric test . 33
9.5.1 Procedures . 33
9.5.2 Requirements . 34
9.6 Endurance tests . 34
9.6.1 General . 34
9.6.2 Procedures for electrical endurance test . 34
9.6.3 Requirements . 35
9.6.4 Procedures for mechanical endurance test (if applicable) . 35
9.6.5 Requirements . 35
9.7 External connections . 35
9.7.1 General . 35
9.7.2 Robustness of terminal with lead wire (if applicable) . 36
9.7.3 Robustness of terminal (if applicable) . 36
9.7.4 Soldering terminals (if applicable) . 37
9.7.5 Connector (if applicable) . 37
9.8 Mechanical stresses tests . 37
9.8.1 General . 37
9.8.2 Mounting . 37
9.8.3 Vibration . 37
9.8.4 Shock . 38
9.8.5 Rough handling shocks (if applicable) . 39
9.9 Environmental tests . 39
9.9.1 General . 39
9.9.2 Cold. 40
9.9.3 Dry heat . 40
9.9.4 Damp heat, steady state . 40
9.9.5 Mould growth . 41
9.9.6 Fluid contamination (if applicable) . 41
9.9.7 Salt mist (if applicable) . 42
9.10 Enclosure protection tests . 42
9.10.1 General . 42
9.10.2 Degree of enclosure . 42
9.10.3 Pressurized water (if applicable) . 42
9.11 Sealing (if applicable) . 43
9.11.1 General . 43
9.11.2 Procedures . 43
9.11.3 Requirements . 43
9.12 Heat and fire resistance . 43
9.12.1 General . 43
9.12.2 Glow-wire . 43

---------------------- Page: 5 ----------------------
– 4 – IEC 62246-4:2023 © IEC 2023
9.12.3 Ball pressure . 44
9.13 Making and breaking capacity (if applicable) . 45
9.13.1 General . 45
9.13.2 Procedures . 45
9.13.3 Requirements . 45
9.14 Conditional short-circuit current test (if applicable) . 46
9.14.1 General . 46
9.14.2 Procedures . 46
9.14.3 Requirements . 46
9.15 Contact reliability test . 46
9.15.1 General . 46
9.15.2 Procedures . 46
9.15.3 Requirements . 46
9.16 Electromagnetic compatibility (EMC) . 46
Annex A (informative) Explanations relating to reed contact magnetic sensor –
Example . 47
Annex B (informative) Explanations relating to the operation of reed contact magnetic
sensor – Example . 48
Annex C (informative) Work principles regarding sensing distances . 49
C.1 General . 49
C.2 Reed contact magnetic sensor with magnetic actuator set (separate type) . 49
C.2.1 Operation . 49
C.2.2 Axial approach . 49
C.2.3 Lateral approach. 50
C.3 Reed contact magnetic sensor with magnetic actuator set (latching type) . 51
C.3.1 Operation . 51
C.3.2 Specified directions . 51
C.4 Reed contact magnetic sensor with magnetic actuator set (fork type) . 52
C.4.1 Operation . 52
C.4.2 Specified directions . 52
C.5 Reed contact magnetic sensor with magnetic actuator set (plunger type) . 53
C.5.1 Operation . 53
C.5.2 Specified directions . 53
C.6 Reed contact magnetic sensor with magnetic actuator set (float type) . 54
C.6.1 Operation . 54
C.6.2 Specific directions . 55
Annex D (informative) Risk assessment . 56
D.1 General . 56
D.2 Risk assessment procedure . 56
D.3 Achieving tolerable risk . 57
D.4 Application of risk assessment procedures (proposal for the user) . 59
Annex E (informative) Test procedures regarding response speed . 61
E.1 General . 61
E.2 Test circuit . 61
E.3 Test sequence . 61
Annex F (informative) Special tests . 63
F.1 General . 63
F.2 Functional tests . 63
F.3 Functional tests and mechanical durability . 63

---------------------- Page: 6 ----------------------
IEC 62246-4:2023 © IEC 2023 – 5 –
F.4 Vibration and shock tests for special requirements of applications . 63
F.5 Explosion proofness . 63
F.5.1 General . 63
F.5.2 Procedures . 63
F.5.3 Requirements . 64
Bibliography . 65


Figure 1 – Methods for measuring the response speed . 28
Figure 2 – Output signal . 28
Figure 3 – Methods for measuring the operating frequency (f). 30
Figure 4 – Output signal during the measuring of operating frequency (f) . 31
Figure 5 – Ball pressure test apparatus . 45
Figure A.1 – Driven method for reed contact magnetic sensor by permanent magnetic
actuator . 47
Figure B.1 – Explanatory diagram of terms related to operation by magnetic actuator . 48
Figure C.1 – Operating approaches . 49
Figure C.2 – Axial approach relating to sensing distances . 50
Figure C.3 – Lateral approach relating to sensing distances . 51
Figure C.4 – Specified directions relating to sensing distances and contact states . 52
Figure C.5 – Specified directions relating to sensing distances . 53
Figure C.6 – Sensing distances . 54
Figure C.7 – Sensing distances according to liquid level . 55
Figure D.1 – Iterative process of risk assessment and risk reduction . 56
Figure D.2 – Risk reduction . 58
Figure E.1 – Test circuit – Example . 61
Figure E.2 – Measurement data by oscilloscope – Example . 62

Table 1 – Reference values of influence quantities . 16
Table 2 – Rated insulation voltage . 16
Table 3 – Rated operating voltage . 17
Table 4 – Rated operating distance . 17
Table 5 – Rated maximum working pressure . 17
Table 6 – Examples of output functions of MSD . 19
Table 7 – Type testing . 21
Table 8 – Routine tests . 22
Table 9 – Required data . 23
Table 10 – Symbols . 25
Table 11 – Examples of indication of rated values. 25
Table 12 – Deviation of operating distance . 26
Table 13 – Remanence value . 27
Table 14 – Typical rated speeds . 28
Table 15 – Typical operating times of switching loads . 29
Table 16 – Frequency of operating cycles . 31
Table 17 – Function test by temperature change . 31

---------------------- Page: 7 ----------------------
– 6 – IEC 62246-4:2023 © IEC 2023
Table 18 – Deviation of operating distance . 32
Table 19 – Test current . 32
Table 20 – Rated voltage of insulation resistance test . 33
Table 21 – Dielectric test voltage . 33
Table 22 – Minimum clearances and creepage distances . 34
Table 23 – Number of cycles for endurance test . 35
Table 24 – Criteria for electrical endurance tests . 35
Table 25 – Torque severity . 36
Table 26 – Value of applied force for test U .
...