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IEC 61643-332:2024

Components for low-voltage surge protection - Part 332: Selection and application principles for metal oxide varistors (MOV)

Standard Details

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.

General Information

Status : ACTIVE
Standard Type: Main
Document No: IEC 61643-332:2024
Document Year: 2024
Pages: 127
Edition: 1.0
  • Section Volume:
  • TC 37.SC 37B Components for low-voltage surge protection
  • ICS:
  • 31.040.20 Potentiometers, variable resistors

Life Cycle

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IEC 61643-332:2024
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