OS GSO IEC 61643-332:2025
IEC 61643-332:2024
Omani Standard
Current Edition
·
Approved on
14 October 2025
Components for low-voltage surge protection - Part 332: Selection and application principles for metal oxide varistors (MOV)
OS GSO IEC 61643-332:2025 Files
English
127 Pages
Current Edition
Reference Language
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OS GSO IEC 61643-332:2025 Scope
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.
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