Effect of Magnetic Field of Arc Chamber and Operating Mechanism on Current Limiting Characteristics of Low-Voltage Circuit Breakers

Degui CHEN  Hongwu LIU  Haitao SUN  Qingjiang LIU  Jingshu ZHANG  

IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.6   pp.915-920
Publication Date: 2003/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Development of Electro-Mechanical Devices (IS-EMD 2002))
Category: Discharges & Related Phenomena
arc quenching chamber,  limiting characteristics,  circuit breakers,  

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The interrupting characteristics of low voltage current limiting circuit breakers have directly relationship with the magnitude and distribution of magnetic field produced by contact system and splitter plates. In order to analyze the influence of configuration of contact system on current limiting characteristics, 3D magnetic field of arc chamber (including contact system, arc, splitter plates) is calculated. Furthermore, the electromagnetic repulsion force of movable contact is also calculated. The results can be used to improve configuration of arc quenching chamber. The cooperation between operating mechanism and electromagnetic repulsion force is also analyzed in this paper.