Electrode processes and arc form in miniature circuit breakers
Electrode processes and arc form in miniature circuit breakers
The electric arc in current limiting circuit breakers is often depicted as a well defined region of current flow. During a short circuit fault the current through the arc in a current limiting miniature circuit breaker can range from 100 to 10000 Amps. This range of current, along with varying electrode conditions, will lead to variation in both the form of the arc and the processes occurring at the electrodes. These electrode processes, in particular the emission mechanism at the cathode root, dominate the mobility characteristics of the arc. Previously proposed electrode processes are reviewed and the interaction of the mechanisms discussed. Using data recorded on a high speed Arc Imaging System observations about the arc behaviour at different intervals of the arc event are related to possible electrode processes. The variation of arc form in miniature circuit breakers is also discussed.
0780349253
93-99
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Jeffery, P.A.
bdb955dd-715d-41c2-821a-8122e05aea8b
Weaver, P.M.
649cbff1-3909-4d09-bab6-79ef325089d0
6 August 2002
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Jeffery, P.A.
bdb955dd-715d-41c2-821a-8122e05aea8b
Weaver, P.M.
649cbff1-3909-4d09-bab6-79ef325089d0
McBride, J.W., Jeffery, P.A. and Weaver, P.M.
(2002)
Electrode processes and arc form in miniature circuit breakers.
In Proceedings of the Forty-Fourth IEEE Holm Conference on Electrical Contacts, 1998.
IEEE.
.
(doi:10.1109/HOLM.1998.722433).
Record type:
Conference or Workshop Item
(Paper)
Abstract
The electric arc in current limiting circuit breakers is often depicted as a well defined region of current flow. During a short circuit fault the current through the arc in a current limiting miniature circuit breaker can range from 100 to 10000 Amps. This range of current, along with varying electrode conditions, will lead to variation in both the form of the arc and the processes occurring at the electrodes. These electrode processes, in particular the emission mechanism at the cathode root, dominate the mobility characteristics of the arc. Previously proposed electrode processes are reviewed and the interaction of the mechanisms discussed. Using data recorded on a high speed Arc Imaging System observations about the arc behaviour at different intervals of the arc event are related to possible electrode processes. The variation of arc form in miniature circuit breakers is also discussed.
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Published date: 6 August 2002
Venue - Dates:
Forty-Fourth IEEE Holm Conference on Electrical Contacts, Arlington, USA, 1998-10-26 - 1998-10-28
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Local EPrints ID: 21243
URI: http://eprints.soton.ac.uk/id/eprint/21243
ISBN: 0780349253
PURE UUID: 9b56a4ef-919b-40f5-911f-f077ecbc9e88
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Date deposited: 06 Dec 2006
Last modified: 16 Mar 2024 02:37
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Author:
P.A. Jeffery
Author:
P.M. Weaver
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