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  • BSI
    BS EN IEC 61643-331:2018 - TC Tracked Changes. Components for low-voltage surge protective devices - Performance requirements and test methods for metal oxide varistors (MOV)
    Edition: 2020
    $617.54
    / user per year

Description of BS EN IEC 61643-331:2018 - TC 2020

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.

Standard NumberBS EN IEC 61643-331:2018 - TC
TitleTracked Changes. Components for low-voltage surge protective devices - Performance requirements and test methods for metal oxide varistors (MOV)
StatusWithdrawn
Publication Date2020-02-26
Withdrawn Date2020-05-21
DescriptorsElectrical equipment, Low voltage, Low-voltage equipment, Surge limiters, Voltage, Surge protection, Surges (electrical), Overvoltage protection, Electrical protection equipment
ICS31.040.01 Resistors in general, 29.120.50 Fuses and other overcurrent protection devices, 31.040.20 Potentiometers, variable resistors
CommitteePEL/37
ISBN978 0 539 10586 5
PublisherBSI
Pages0

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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