提升直流塑壳断路器短路分断能力的设计研究  

Designand Research on Improving Short-Circuit Breaking Capacity of DC MCCB

作　　者：李学琳 蒋顾平 施晓蓉[1] LI Xuelin;JIANG Guping;SHI Xiaorong(Hunan Institute of Engineering,Xiangtan 411101,China;Shanghai Liangxin Electrical Co.,Ltd.,Shanghai 200137,China)

机构地区：[1]湖南工程学院,湖南湘潭411101 [2]上海良信电器股份有限公司,上海200137

出　　处：《电器与能效管理技术》2021年第7期45-50,共6页Electrical & Energy Management Technology

摘　　要：直流塑料外壳式断路器(MCCB)是低压电器中的重要一员。针对直流MCCB灭弧系统,可以使用增加极数法和增加容量法来进行短路分断能力的提升。增加极数法通过串联更多的极数提高电弧电压;增加容量法通过增加单个灭弧室的灭弧能力来提高电弧电压。同时,电感也对短路分断起到非常重要的影响。DC moulded case circuit breaker(MCCB)is an important part of low voltage electrical apparatus.The arc extinction is maily completed by the arc extinguishing system in MCCB.DC MCCB can use the method of increasing the number of poles and increasing capacity to improve the short-circuit breaking capacity.The method of increasing the number of poles increases the arc voltage by connecting more poles in series.The method of increasing capacity increases the arc voltage by increasing the arc extinguishing ability of a single arc extinguishing chamber.Inductance also plays a very important role in short circuit breaking.

关 键 词：直流塑壳断路器 电弧 灭弧室 短路分断能力 

分 类 号：TM561[电气工程—电器]