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Received: 2006-12-19

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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.3 P.459~463


Testing results analysis of contact materials’ electrical contact performance

Author(s):  WANG Jing-qin, WANG Hai-tao, WEN Ming, ZHU Yan-cai

Affiliation(s):  Institute of Electrical Apparatus, Hebei University of Technology, Tianjin 300130, China

Corresponding email(s):   wanght@hebut.edu.cn

Key Words:  Ag/SnO2-La2O3-Bi2O3, Contact materials, Electrical contact performance

WANG Jing-qin, WANG Hai-tao, WEN Ming, ZHU Yan-cai. Testing results analysis of contact materials’ electrical contact performance[J]. Journal of Zhejiang University Science A, 2007, 8(3): 459~463.

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T1 - Testing results analysis of contact materials’ electrical contact performance
A1 - WANG Jing-qin
A1 - WANG Hai-tao
A1 - WEN Ming
A1 - ZHU Yan-cai
J0 - Journal of Zhejiang University Science A
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DOI - 10.1631/jzus.2007.A0459

Because of the different ways in which contact materials work, the basic requirements for silver metal oxide contact materials are different. They are anti-welded and anti-erosion when closed, anti-erosion when broken, and arc easily moved and have smaller contact resistance. In this paper, La2O3 is used as a stable oxide in contact material to replace CdO. A new type of ag/SnO2-La2O3-Bi2O3 contact material is first obtained through using powder metallurgical method. Then electrical contact material parameter tester is used to test the electrical contact performance of the contact material. Through experiments, the arcing voltage and current curves, arcing energy curves, fusion power curves while broken and contact resistance while closed were obtained. Analysis of the results showed that the addition of La2O3 makes the contact material have the following advantages: smaller electrical wear, smaller arc energy, smaller contact resistance and arc is more easily extinguished.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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