FprEN IEC 61643-332:2023

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: Not Published
• Publication Date: 18-Apr-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: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 19-Jan-2024
• Completion Date: 19-Jan-2024
• Ref Project: kSIST FprEN IEC 61643-332:2023 - Components for low-voltage surge protection - Part 332: Selection and application principles for metal oxide varistors (MOV)

Standards Content (Sample)

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
...