EN IEC 61643-332:2024

Components for low-voltage surge protection - Part 332: Selection and application principles for metal oxide varistors (MOV)

IEC 61643-332:2024 describes the theory of operation, principles for the selection and application of MOVs to be connected to power lines or telecommunication or signalling circuits, up to 1 000 V AC or 1 500 V DC. These SPCs are designed to protect apparatus or personnel, or both, from high transient voltages. This document applies to MOVs having two electrodes and voltage dependents elements with or without disconnectors. It does not apply to assemblies that include MOVs and their influence on the MOV's characteristics. This standard specifically discusses the zinc-oxide type of MOVs.

Bauelemente für den Überspannungsschutz bei Niederspannungen - Teil 332: Auswahl- und Anwendungsgrundsätze für Metalloxidvaristoren (MOV)

Composants pour parafoudres basse tension - Partie 332: Choix et principes d'application des varistances à oxyde métallique (MOV)

IEC 61643-332: 2024 décrit la théorie de fonctionnement, ainsi que les principes relatifs au choix et à l'application des varistances à oxyde métallique (MOV, Metal Oxide Varistors) destinées à être connectées à des lignes électriques ou à des circuits de télécommunication ou de signalisation, jusqu'à 1 000 V en courant alternatif ou 1 500 V en courant continu. Ces composants de parafoudres (SPC, Surge Protective Components) sont conçus pour protéger l'appareillage et/ou le personnel contre les hautes tensions transitoires. Le présent document s'applique aux MOV qui possèdent deux électrodes et des éléments variables, avec ou sans déconnecteurs. Il ne s'applique pas aux ensembles qui comportent des MOV ni à leur influence sur les caractéristiques des MOV. La présente norme traite spécifiquement des MOV de type oxyde de zinc.

Sestavni deli za nizkonapetostne naprave za zaščito pred prenapetostnimi udari - 332. del: Izbira in načini uporabe za kovinsko-oksidne varistorje (MOV)

General Information

• Status: Published
• Publication Date: 23-May-2024
• ICS: 31.040.20 - Potentiometers, variable resistors
• Technical Committee: CLC/SR 37B - Specific components for surge arresters and surge protective devices
• Drafting Committee: IEC/SC 37B - IEC_SC_37B
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 24-May-2024
• Completion Date: 24-May-2024
• Ref Project: SIST EN IEC 61643-332:2024 - Components for low-voltage surge protection - Part 332: Selection and application principles for metal oxide varistors (MOV)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61643-332:2024
01-julij-2024
Sestavni deli za nizkonapetostne naprave za zaščito pred prenapetostnimi udari -
332. del: Izbira in načini uporabe za kovinsko-oksidne varistorje (MOV)
Components for low-voltage surge protection - Part 332: Selection and application
principles for metal oxide varistors (MOV)
Bauelemente für den Überspannungsschutz bei Niederspannungen - Teil 332: Auswahl-
und Anwendungsgrundsätze für Metalloxidvaristoren (MOV)
Composants de protection contre les surtensions basse tension - Partie 332 : Principes
de sélection et d'application pour les varistances à oxyde métallique (MOV)
Ta slovenski standard je istoveten z: EN IEC 61643-332:2024
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
31.040.20 Potenciometri, spremenljivi Potentiometers, variable
upori resistors
SIST EN IEC 61643-332:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61643-332:2024

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SIST EN IEC 61643-332:2024


EUROPEAN STANDARD EN IEC 61643-332

NORME EUROPÉENNE

EUROPÄISCHE NORM May 2024
ICS 31.040.20

English Version
Components for low-voltage surge protection - Part 332:
Selection and application principles for metal oxide varistors
(MOV)
(IEC 61643-332:2024)
Composants pour parafoudres basse tension - Partie 332: Bauelemente für den Überspannungsschutz bei
Choix et principes d'application des varistances à oxyde Niederspannungen - Teil 332: Auswahl- und
métallique (MOV) Anwendungsgrundsätze für Metalloxidvaristoren (MOV)
(IEC 61643-332:2024) (IEC 61643-332:2024)
This European Standard was approved by CENELEC on 2024-05-22. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61643-332:2024 E

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SIST EN IEC 61643-332:2024
EN IEC 61643-332:2024 (E)
European foreword
The text of document 37B/243/FDIS, future edition 1 of IEC 61643-332, prepared by SC 37B
"Components for low-voltage surge protection" of IEC/TC 37 "Surge arresters" was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61643-332:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-02-22
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-05-22
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61643-332:2024 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60364-5-51:2005 NOTE Approved as HD 60364-5-51:2009 +A11:2013 +A12:2017
IEC 61000-4-2:2008 NOTE Approved as EN 61000-4-2:2009 (not modified)
IEC 60068-1:2013 NOTE Approved as EN 60068-1:2014 (not modified)
IEC 60068-2-20:2021 NOTE Approved as EN IEC 60068-2-20:2021 (not modified)
IEC 60068-2-21:2021
...

SLOVENSKI STANDARD
oSIST prEN IEC 61643-332:2023
01-marec-2023
Sestavni deli za nizkonapetostne naprave za zaščito pred prenapetostnimi udari -
332. del: Izbira in načini uporabe za kovinsko-oksidne varistorje (MOV)
Components for low-voltage surge protection - Part 332: Selection and application
principles for metal oxide varistors (MOV)
Composants de protection contre les surtensions basse tension - Partie 332 : Principes
de sélection et d'application pour les varistances à oxyde métallique (MOV)
Ta slovenski standard je istoveten z: prEN IEC 61643-332:2022
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
31.040.20 Potenciometri, spremenljivi Potentiometers, variable
upori resistors
oSIST prEN IEC 61643-332:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 61643-332:2023

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oSIST prEN IEC 61643-332:2023
37B/230/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61643-332 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-12-30 2023-03-24
SUPERSEDES DOCUMENTS:
37B/226/CD, 37B/229/CC

IEC SC 37B : COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTION
SECRETARIAT: SECRETARY:
United States of America Mr Casey Granata
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

SC 37A,TC 40,TC 108
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Components for low-voltage surge protection – Part 332: Selection and application principles
for metal oxide varistors (MOV)

PROPOSED STABILITY DATE: 2025

NOTE FROM TC/SC OFFICERS:


Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

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oSIST prEN IEC 61643-332:2023
IEC CDV 61643-332/Ed1  IEC:2022 – 2 – 37B/230/CDV

1 CONTENTS
2
3 FOREWORD . 5
4 1 Scope . 7
5 2 Normative references . 7
6 3 Terms, definitions, symbols and abbreviated terms . 8
7 Terms and definitions. 8
8 3.1.1 Ratings . 8
9 3.1.2 Characteristics . 9
10 Symbols and abbreviated terms used in this document . 11
11 3.2.1 Abbreviated terms . 11
12 4 General . 12
13 5 Construction . 12
14 6 Function . 12
15 Theory of operation . 12
16 Thermal protection . 14
17 Failure modes . 14
18 6.3.1
...