IEC 61643-331:2017
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Components for low-voltage surge protective devices - Part 331: Performance requirements and test methods for metal oxide varistors (MOV)
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
English - French, English
07-12-2017
31-12-2021
FOREWORD
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated
terms
4 Service conditions
5 Mechanical requirements and materials
6 General
7 Electrical requirements
8 Standard design test criteria
9 Nominal discharge current and limited current
temporary overvoltage
Annex A (informative) - MOV testing according to
IEC 61643-11:2011 - Surge protective devices
for the Class I, II and III
Annex B (informative) - IEC 61051 Varistors for use
in electronic equipment
Annex C (informative) - Accelerated endurance
screening test
Annex D (informative) - Proposed test method for
determination of mean time to failure (MTTF)
Bibliography
IEC 61643-331:2017 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 line, or telecommunication, or signalling circuits. They are designed to protect apparatus or personnel, or both, from high transient voltages. This specification applies to MOVs having two electrodes and hybrid overvoltage protection components. This specification 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 second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Update of the nominal varistor voltage test method;
b) Addition of thermally protected varistors – component symbol and test methods;
c) Addition of nominal discharge current – test methods;
d) Addition of voltage ratings for disc types (Table 1);
e) Addition of test currents for clamping voltage of disc types (Table 2);
f) Addition of typical voltage ratings of SMD types (Table 3); and
g) Addition of Limited current and temporary overvoltage tests for thermally protected varistors.
Keywords: metal oxide varistors (MOV), high transient voltages.
| Committee |
TC 37/SC 37B
|
| DevelopmentNote |
Stability Date: 2019. (12/2017)
|
| DocumentType |
Standard
|
| Pages |
82
|
| PublisherName |
International Electrotechnical Committee
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| NEN-EN-IEC 61643-331:2018 | Identical |
| CEI EN IEC 61643-331 : 2018 | Identical |
| JIS C 5381-331:2006 | Identical |
| SS-EN IEC 61643-331:2018 | Identical |
| DIN EN IEC 61643-331:2020-01 | Identical |
| VDE 0845-5-3:2020-01 | Identical |
| OVE EN IEC 61643-331: 2020 03 01 | Identical |
| UNE-EN IEC 61643-331:2018 | Identical |
| BS EN 61850-6:2010 | Identical |
| BS EN IEC 61643-331:2018 | Identical |
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