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An Observation of the Breaking Arc between Silver Contacts Using a High Speed Color Video

Mitsuru TAKEUCHI, Takayoshi KUBONO

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Summary :

The distributions of a spectral intensity of the breaking arc between silver contacts in DC 45-66 V/2.5-5.0 A circuits have been measured using a high-speed color video. As a result, a cathode brightening spot, which has a high spectral intensity, exists near the cathode surface. The cathode brightening spot expands with the increase of the contact gap, but its length expands until about 18µm. When the contact gap spreads over about 180 µm, a dark positive column appears and grows between the cathode brightening spot and the anode surface. The higher the interrupted current is, the larger the diameter of the cathode brightening spot will be. The maximum diameter of cathode brightening spot is 500 µm under these experiments.

Publication
IEICE TRANSACTIONS on Electronics Vol.E82-C No.1 pp.33-40
Publication Date
1999/01/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Issue on Electromechanical Devices and Their Materials)
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