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The correlation of magnetic, gas dynamic and thermal effects on arc mobility in low contact velocity circuit breakers

The correlation of magnetic, gas dynamic and thermal effects on arc mobility in low contact velocity circuit breakers
The correlation of magnetic, gas dynamic and thermal effects on arc mobility in low contact velocity circuit breakers
This paper examines arc root mobility in relation to magnetic and gas dynamic forces in low contact opening velocity circuit breakers (1 m/s). Arcing conditions of interest are short circuit faults (10/sup 3/-10/sup 4/ A) in low voltage (220-380 VAC) circuit breakers. Previously published experimental results have shown how the gas flow and venting in the contact region affects the arc root mobility. In this paper the interrelation of gas dynamic and magnetic forces is investigated further by developing relationships between electromagnetic forces and high temperature gas dynamic flows. New semi-empirical modeling and experimental results are presented in terms of electrical and thermal energy transfer between the arc and the gas flow. The influences of magnetic field on the relationships between arc power, arc voltage, arc current and arc energy are discussed. The effects of heat transfer and thermal power on the gas flows in the arc chamber are explored. These effects are discussed particularly in relation to arc root motion in low contact opening velocity systems. Some features of arc root mobility, which had hitherto been anomalous, are explained. Furthermore, these are used to extend and develop models of arc root commutation. This study provides a vital step in the development of a consistent model of the arc structure and motion in miniature circuit breakers operating at low contact opening velocity.
0780374339
86-94
Institute of Electrical and Electronics Engineers
Pechrach, K.
58bf3627-cfd9-4909-a76b-d236bfdcadca
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Weaver, P.
0a853363-cd12-441d-971f-1ce03081f525
Pechrach, K.
58bf3627-cfd9-4909-a76b-d236bfdcadca
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Weaver, P.
0a853363-cd12-441d-971f-1ce03081f525

Pechrach, K., McBride, J.W. and Weaver, P. (2002) The correlation of magnetic, gas dynamic and thermal effects on arc mobility in low contact velocity circuit breakers. In Proceedings of the Forty-Eighth IEEE Holm Conference on Electrical Contacts, 2002. Institute of Electrical and Electronics Engineers. pp. 86-94 . (doi:10.1109/HOLM.2002.1040827).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper examines arc root mobility in relation to magnetic and gas dynamic forces in low contact opening velocity circuit breakers (1 m/s). Arcing conditions of interest are short circuit faults (10/sup 3/-10/sup 4/ A) in low voltage (220-380 VAC) circuit breakers. Previously published experimental results have shown how the gas flow and venting in the contact region affects the arc root mobility. In this paper the interrelation of gas dynamic and magnetic forces is investigated further by developing relationships between electromagnetic forces and high temperature gas dynamic flows. New semi-empirical modeling and experimental results are presented in terms of electrical and thermal energy transfer between the arc and the gas flow. The influences of magnetic field on the relationships between arc power, arc voltage, arc current and arc energy are discussed. The effects of heat transfer and thermal power on the gas flows in the arc chamber are explored. These effects are discussed particularly in relation to arc root motion in low contact opening velocity systems. Some features of arc root mobility, which had hitherto been anomalous, are explained. Furthermore, these are used to extend and develop models of arc root commutation. This study provides a vital step in the development of a consistent model of the arc structure and motion in miniature circuit breakers operating at low contact opening velocity.

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More information

Published date: 10 December 2002
Additional Information: 1501
Venue - Dates: 48th IEEE Holm Conference on Electrical Contacts, 2002-10-21 - 2002-10-23

Identifiers

Local EPrints ID: 22115
URI: http://eprints.soton.ac.uk/id/eprint/22115
ISBN: 0780374339
PURE UUID: 54d1b610-f9d2-4708-ae12-a3dae28f237e

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Date deposited: 05 Jun 2006
Last modified: 15 Jul 2019 19:23

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