prBAS IEC TR 61643-333:2027

Components for low-voltage surge protection - Part 333: characteristic equations and life evaluation for metal oxide varistors (MOV)

General information

Status:Project

Number of pages:40

Adoption method:Proglašavanje

Language:engleski

Edition:1.

Realization date:29.10.2026

Forseen date for next stage code:05.11.2026

Technical committee:BAS/TC 8, Insulation co-ordination, high-voltage testing and instrument transformers

ICS:

29.240.10, Substations. Surge arresters

Abstract

IEC TR 61643-333:2026 presents the U-I/R-I characteristic equations and the life evaluation method for MOVs, 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 document specifically addresses the zinc-oxide type of MOVs.

Lifecycle

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Original document and degree of correspondence

IEC TR 61643-333:2026, identical

Work material

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