Redline version
All the changes between the new edition and previous edition of the publication are highlighted with track changes mode.
IEC 61643-331:2020 RLV
IEC 61643-331
IEC 61643-331:2020
Components for low-voltage surge protection - Part 331: Performance requirements and test methods for metal oxide varistors (MOV)
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:
- a Varistor MCOV rating assurance test;
- an energy rating test (2ms);
- revised Dielectric strength and insulation resistance tests.
- a Varistor MCOV rating assurance test;
- an energy rating test (2ms);
- revised Dielectric strength and insulation resistance tests.
CHFÂ 280.-
Redline version
All the changes between the new edition and previous edition of the publication are highlighted with track changes mode.
DiscoverTechnical committee
TC 37/SC 37B Components for low-voltage surge protection| Publication type | International Standard |
| Publication date | 2020-03-19 |
| Edition | 3.0 |
| ICS | 31.040.20 |
| Stability date | 2025 |
| ISBN number | 9782832285589 |
| Pages | 89 |
| File size | 3.51 MB |
Ensure access to affordable, reliable, sustainable and modern energy for all
Promote inclusive and sustainable economic growth, full and productive employment and decent work for all
Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
Make cities and human settlements inclusive, safe, resilient and sustainable
Take urgent action to combat climate change and its impacts