低压系统SPD和后备过电流保护装置可靠性分析  

Reliability Analysis of SPD and Backup Overcurrent Protection Device in Low‑voltage System

作　　者：姚烨 薛文安[2] YAO Ye;XUE Wen’an(Tianjin C-POWER Lightning Protection Technology Co.,Ltd.,Tianjin 300392,China;Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]天津市中力防雷技术有限公司,天津市300392 [2]中国民航大学,天津市300300

出　　处：《建筑电气》2021年第10期7-11,共5页Building Electricity

摘　　要：介绍浪涌保护器及其后备过电流保护装置的时间质量,重点分析金属氧化物压敏电阻型浪涌保护器、熔断器、断路器以及专用断路器的可靠性特征量失效率和系统失效率,并进行比较。指出选择高可靠性(低失效率)SPD是提高系统可靠性的根本措施,降额设计是提高SPD可靠性的主要方法之一,熔断器是后备过电流保护装置中失效率最低的器件。This paper introduces the time quality of SPD(surge protective device)and its backup overcurrent protection device,focuses on the analysis and comparison of the characteristic quantity failure rate and system failure rate of the reliability of metal oxide varistor‑type SPD,fuse,circuit breaker and special circuit breaker.It is pointed out that the selection of high‑reliability SPD(low failure rate)is the fundamental measure to improve the system reliability,derating design is one of the main methods to improve the reliability of SPD,and fuse is the device with the lowest failure rate among backup overcurrent protection devices.

关 键 词：浪涌保护器 过电流保护装置 标称放电电流 SPD安装点的预期浪涌电流 可靠度 失效率 熔断器 断路器 

分 类 号：TU895[建筑科学]