Analysis of the Behavior of Cuprous Oxide by Acceleration Test for Evaluation of Heat and Fire Phenomena of Imperfectly Connected Electrical Terminal

Yoichi AOYAMA  Hisa NUMA  Ryo FUJITA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E90-C    No.7    pp.1398-1404
Publication Date: 2007/07/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.7.1398
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006))
Category: Contact Phenomena
Keyword: 
heat and fire phenomena,  loose contact,  microslide motion,  imperfectly connected electrical terminal,  the acceleration test,  cuprous oxide,  

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Summary: 
To evaluate heat and fire phenomena caused by accumulated microslide motion on an imperfectly connected electrical terminal, an acceleration test method using vibrator was developed. The process from the generation of CuO to that of Cu2O has been reproduced. The influence of current is investigated, and it is found that as current increases, CuO generation time T1 and Cu2O generation time T2 decrease for pure copper, however when current exceeds 3 A, we could not produce CuO or Cu2O. The contact resistances of a Cu terminal and wire, compared with the terminal material were investigated in terms of the effects of current and ambient temperature.