IEC 61643-331:2019 PRV 
Pre release version

Components for low-voltage surge protection - Part 331: Performance requirements and test methods for metal oxide varistors (MOV)

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Abstract

This Final Draft International Standard is an up to 6 weeks' pre-release of the official publication. It is available for sale during its voting period: 2019-11-29 to 2020-01-10. By purchasing this FDIS now, you will automatically receive, in addition, the final publication.

IEC 61643-331:2020 is a test specification for metal oxide varistors (MOV), which are used for applications up to 1 000 V AC or 1 500 V DC in power lines, or telecommunication, or signalling circuits. They are designed to protect apparatus or personnel, or both, from high transient voltages. This document applies to MOVs having two electrodes and hybrid surge protection components. This document also does not apply to mountings and their effect on the MOV’s characteristics. Characteristics given apply solely to the MOV mounted only in the ways described for the tests. This third edition cancels and replaces the second edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:

  1. a Varistor MCOV rating assurance test;
  2. an energy rating test (2ms);
  3. revised Dielectric strength and insulation resistance tests.

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Additional information

Publication typeInternational Standard
Publication date2019-11-29
Edition3.0
Available language(s)English
TC/SCTC 37/SC 37B - Components for low-voltage surge protectionrss
ICS31.040.20 - Potentiometers, variable resistors
Stability date  2023
Pages42
File size3191 KB

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