DocumentCode :
954222
Title :
Observations of Extreme Cases of Contact Activation
Author :
Gray, Eoin W.
Author_Institution :
Bell Labs.
Volume :
12
Issue :
2
fYear :
1976
fDate :
6/1/1976 12:00:00 AM
Firstpage :
154
Lastpage :
156
Abstract :
The process of contact activation or arc duration enhancement has been observed between various precious and nonprecious metals in highly activated (2 X 10-3- 100 torr) organic vapor-air mixtures. The results suggest that the enhanced arc durations observed under field, and some laboratory conditions, may only be an early stage of contact activation. A condition of extreme activation occurs where the duration of the enhanced arcing may be considerably reduced, and the voltage-time curves of contact opening show an almost continuous transition from zero potential to the open circuit voltage. At this stage the contacts are observed to have large amounts of carbonaceous particles present on them. This phenomenon of arc duration reduction under extreme activating conditions has been tentatively explained by considering a carbon particle bridging process between the electrodes.
Keywords :
Arcs; Contacts; Relays; Bridge circuits; Electrodes; Heating; Palladium; Pollution measurement; Relays; Springs; Time of arrival estimation; Voltage; Wire;
fLanguage :
English
Journal_Title :
Parts, Hybrids, and Packaging, IEEE Transactions on
Publisher :
ieee
ISSN :
0361-1000
Type :
jour
DOI :
10.1109/TPHP.1976.1135109
Filename :
1135109
Link To Document :
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