An Experimental Equation for Dependence of Duration of Breaking Arcs on Supply Voltage with Constant Circuit Resistance

Junya SEKIKAWA  Takayoshi KUBONO  

IEICE TRANSACTIONS on Electronics   Vol.E88-C   No.8   pp.1584-1589
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.8.1584
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices--Selected Papers from International Session on Electro-Mechanical Devices 2004 (IS-EMD2004)--)
Category: Arc Discharge & Related Phenomena
electrical contact,  arc discharge,  breaking arc,  arc duration,  experimental equation,  

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Arc duration of breaking arcs is investigated in order to obtain an experimental equation for the dependence of the arc duration on supply voltage in DC resistive circuit in air at atmospheric pressure. Materials of the contact pairs are Au, Ag, Cu, Ni, Pt and Pd. The interrupted current is ranging from 6 A to 10 A and the supply voltage is 30 V, 42 V and 54 V. Sato's experimental equation for the arc length is modified to obtain more appropriate experimental equation for our experimental results. The arc termination current It and minimum arc voltage Vm that are obtained with the experimental results are used as parameters of the experimental equation for each contact material. And characteristic coefficients C for each contact material in the experimental equation are obtained. As results, the experimental equation for each contact material well agrees with the experimental results. The experimental equation for several contact materials is presented.