Experimental Research of Arc Behavior in Liquid Metal for Current Limiting Application

Yiying LIU  Mingzhe RONG  Yi WU  Chenxi PAN  Hong LIU  Shijie YU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E92-C   No.8   pp.1008-1012
Publication Date: 2009/08/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2008))
Category: Arc Discharge & Contact Phenomena
Keyword: 
liquid metal,  current limiter,  electrical arc,  pinch effect,  

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Summary: 
The liquid metal current limiter (LMCL) is a possible alternative to limit the short current of power system due to its special merits. This paper is devoted to the investigation of the arc behavior in liquid metal GaInSn for current limiting application. Firstly, the arc evolution including arc initiation, arc expansion and arc extinguish is observed through an experimental device. The resistance of arc and the self healing property of liquid metal are described. Subsequently, the arc erosion on electrodes is presented with its causes analyzed. Finally, the arc characteristics with the influence of rise rate of prospective current and channel diameter are discussed in details.