低压浪涌保护元件第331部分:金属氧化物压敏电阻器（MOV）的性能要求和试验方法

[中文适用范围]： 本部分 IEC 61643 是关于金属氧化物压敏电阻（MOV）的测试规范，用于电力线路、电信或信号电路中高达1000V交流或1500V直流的应用。它们旨在保护设备或人员，或两者免受高瞬态电压的影响。 本文件适用于具有两个电极和混合浪涌保护元件的MOV。本文件也不适用于安装及其对MOV特性的影响。给出的特性仅适用于按照测试描述方式安装的MOV。 [外文原描述]： IEC 61643-331:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 61643-331:2020 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 lines, or telecommunication, or signalling circuits. They are designed to protect apparatus or personnel, or both, from high transient voltages. This document applies to MOVs having two electrodes and hybrid surge protection components. This document 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 third edition cancels and replaces the second edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - a Varistor MCOV rating assurance test; - an energy rating test (2ms); - revised Dielectric strength and insulation resistance tests.