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3D finite element analysis modelling of the arc chamber of a current limiting miniature circuit breaker

3D finite element analysis modelling of the arc chamber of a current limiting miniature circuit breaker
3D finite element analysis modelling of the arc chamber of a current limiting miniature circuit breaker
This paper presents the initial stage of a 3D finite element (FE) model of the electromagnetic field in the arc chamber of a current limiting miniature circuit breaker (MCB). The final objective of the model is to compute the magnetic forces on the arc, and predict the position of the arc at a series of discrete time steps. The trajectory of the arc calculated from the model will then be compared with experimental data recorded by a high speed arc imaging system (AIS) on a flexible test apparatus (FTA) designed to simulate the operation of a commercial MCB under laboratory conditions. By comparing the FE model of the arc behaviour with the actual arc images generated from the AIS an insight into the factors governing the motion of the arc can be gained. In particular the relative importance of the average flux density across the arc chamber is compared with the local flux density distribution at the arc roots. An understanding of the influence of the magnetic flux distribution can then be used to improve the magnetic design of the MCB to promote low immobility times and effective current limiting operation.
0332-1649
244-251
Jeffery, P.A.
bdb955dd-715d-41c2-821a-8122e05aea8b
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
McBride, J.W.
557c08d3-dcc6-4949-a225-a3d7a95b4cf1
Jeffery, P.A.
bdb955dd-715d-41c2-821a-8122e05aea8b
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
McBride, J.W.
557c08d3-dcc6-4949-a225-a3d7a95b4cf1

Jeffery, P.A., Sykulski, J.K. and McBride, J.W. (1998) 3D finite element analysis modelling of the arc chamber of a current limiting miniature circuit breaker. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 17 (2), 244-251. (doi:10.1108/03321649810369401).

Record type: Article

Abstract

This paper presents the initial stage of a 3D finite element (FE) model of the electromagnetic field in the arc chamber of a current limiting miniature circuit breaker (MCB). The final objective of the model is to compute the magnetic forces on the arc, and predict the position of the arc at a series of discrete time steps. The trajectory of the arc calculated from the model will then be compared with experimental data recorded by a high speed arc imaging system (AIS) on a flexible test apparatus (FTA) designed to simulate the operation of a commercial MCB under laboratory conditions. By comparing the FE model of the arc behaviour with the actual arc images generated from the AIS an insight into the factors governing the motion of the arc can be gained. In particular the relative importance of the average flux density across the arc chamber is compared with the local flux density distribution at the arc roots. An understanding of the influence of the magnetic flux distribution can then be used to improve the magnetic design of the MCB to promote low immobility times and effective current limiting operation.

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Published date: 1998
Organisations: EEE

Identifiers

Local EPrints ID: 253583
URI: https://eprints.soton.ac.uk/id/eprint/253583
ISSN: 0332-1649
PURE UUID: 83f98fa6-e6b1-4f87-aa90-0078361665fe
ORCID for J.K. Sykulski: ORCID iD orcid.org/0000-0001-6392-126X

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Date deposited: 10 Oct 2003
Last modified: 17 May 2019 00:39

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