低压交流断路器直流分断能力的计算及校验  

Calculation and Verification of DC Breaking Capacity of Low Voltage AC Circuit Breaker

作　　者：沈建华[1] 祝敏[1] 滕科嘉 Shen Jian-hua;Zhu Min;Teng Ke-jia

机构地区：[1]西安航天动力试验技术研究所,陕西西安710100

出　　处：《电力系统装备》2020年第20期60-62,共3页Electric Power System Equipment

摘　　要：随着我国经济的飞速发展,以前只用于传统工业生产的低压直流电也逐渐应用于民用领域,可能会出现非专业用户使用交流断路器控制直流线路的开路、断路的情况。低压交流断路器的正常工作是电路系统正常工作的前提,能够为电路正常通电提供保障,一旦电路系统发生故障,断路器能够及时切断故障回路,能够有效避免大型电路事故的发生。文章先讨论了低压交流断路器的分断能力以及不同电路系统对低压交流断路器的选择,然后对低压交流短路器在直流电路中的分断能力进行试验、计算及校验。With the rapid development of my country’s economy,the quality of people’s production and life has gradually improved.In the past,low-voltage DC power,which was only used in traditional industrial production,is gradually being used in the civilian fi eld.It may happen that non-professional users use AC circuit breakers to control the open circuit or disconnection of DC lines.The normal operation of the low-voltage AC circuit breaker is the prerequisite for the normal operation of the circuit system,which can provide protection for the normal energization of the circuit.Once the circuit system fails,the circuit breaker can cut off the fault circuit in time,which can effectively avoid the occurrence of large-scale circuit accidents.This article fi rst discusses the breaking capacity of lowvoltage AC circuit breakers and the selection of low-voltage AC circuit breakers for different circuit systems,and then tests,calculates and verifi es the breaking capacity of low-voltage AC circuit breakers in DC circuits.

关 键 词：低压交流断路器 电路事故 电路系统 计算校验 

分 类 号：TM561[电气工程—电器]