低压浪涌保护元件 第332部分：金属氧化物压敏电阻（MOV）的选择和应用原则

[中文适用范围]： 本部分IEC 61643描述了MOV（金属氧化物压敏电阻）的工作原理、选择和应用原则，适用于连接到电源线、电信或信号电路的MOV，其电压不超过1000V交流或1500V直流。这些SPC（浪涌保护组件）旨在保护设备或人员免受高瞬态电压的影响。 本文件适用于具有两个电极和电压依赖元件的MOV，无论是否带有断开器。它不适用于包含MOV及其对MOV特性影响的组件。 本标准特别讨论了氧化锌类型的MOV。 [外文原描述]： 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.