The effect of contact opening velocity and the moment of contact opening on the AC erosion of Ag/CdO contacts
The effect of contact opening velocity and the moment of contact opening on the AC erosion of Ag/CdO contacts
This paper presents experimental results on the influence of contact opening velocity and the moment of contact opening with respect to the start of the AC current cycle on arc energy and contact erosion when breaking an AC resistive circuit. The test currents are 5.6 A, 14.7 A, and 26.3 A, and the contact material is Ag/CdO (90/10). A computer controlled test system allows the control of the contact velocity profiles with constant velocities up to 0.8 m/s and also enables the synchronization of the contact opening with a point on the AC current waveform. Contact erosion is evaluated by measuring the mass changes of the cathode and anode. The results show that increasing the contact velocity from 0.1 m/s to 0.8 m/s leads to an increase in the arc energy. The material transfer from one electrode to another is shown to depend on the current, the polarity of the moving contact, the moment of the contact opening with respect to the start of the AC current cycle, and the opening velocity of the contacts
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
1994
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
McBride, J.W. and Sharkh, S.M.
(1994)
The effect of contact opening velocity and the moment of contact opening on the AC erosion of Ag/CdO contacts.
IEEE Tranactions on Components Packaging and Manufacturing Technology, 17 (1).
(doi:10.1109/95.296361).
Abstract
This paper presents experimental results on the influence of contact opening velocity and the moment of contact opening with respect to the start of the AC current cycle on arc energy and contact erosion when breaking an AC resistive circuit. The test currents are 5.6 A, 14.7 A, and 26.3 A, and the contact material is Ag/CdO (90/10). A computer controlled test system allows the control of the contact velocity profiles with constant velocities up to 0.8 m/s and also enables the synchronization of the contact opening with a point on the AC current waveform. Contact erosion is evaluated by measuring the mass changes of the cathode and anode. The results show that increasing the contact velocity from 0.1 m/s to 0.8 m/s leads to an increase in the arc energy. The material transfer from one electrode to another is shown to depend on the current, the polarity of the moving contact, the moment of the contact opening with respect to the start of the AC current cycle, and the opening velocity of the contacts
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1994_-_McBride_and_Sharkh_-_IEEE_Trans_CPMT_1994_-_Effect_of_Opening_Speed.pdf
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Published date: 1994
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Mechatronics
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Local EPrints ID: 202375
URI: http://eprints.soton.ac.uk/id/eprint/202375
PURE UUID: fb707917-ce51-4afa-b6c9-d4d32f85e70e
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Date deposited: 08 Nov 2011 17:18
Last modified: 15 Mar 2024 02:48
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