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Article Dans Une Revue Journal of Physics D: Applied Physics Année : 2007

Numerical study of the short pre-arcing time in HBC fuses via an enthalpy formulation

Résumé

In order to study the short pre-arcing time in HBC fuses, we use a mathematical model including phase change of the fuse-element heating coupled with the Laplace equation for the potential and the Ohm's law. The thermal model is based on the enthalpy formulation of the heat equation with a source term representing the Joule heating. For the time range considered (up to 10 ms), we assume no heat transfer between the fuse-element and the surrounding sand. To solve numerically the governing equations, we employ a semi-implicit scheme for time integration and a finite element method for space discretization. Using electrical and thermal properties of the silver fuse-element, we present pre-arcing characteristics (temperature, current density, potential) for a fuse-element used in industrial protection circuits.
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Dates et versions

hal-00123743 , version 1 (10-01-2007)

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Rachid Touzani, David Rochette, William Bussiere. Numerical study of the short pre-arcing time in HBC fuses via an enthalpy formulation. Journal of Physics D: Applied Physics, 2007, 40, pp.4544-4551. ⟨10.1088/0022-3727/40/15/026⟩. ⟨hal-00123743⟩
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