W. Bussiere

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In this paper, we present a model and a numerical method of the fuse element heating including solid-liquid-vapour phase transitions in order to evaluate the pre-arcing time in HBC fuses. The mathematical model is based on the enthalpy formulation of the heat equation with a source term representing the Joule effect coupled with the Laplace equation for the(More)
Two main areas of research can be determined for the basic data that are composition, thermodynamic properties and transport coefficients: the polyphasic area and the gas phase and plasma phase area. In the case of mixture of (Ag, SiO<sub>2</sub>) that can be found in fuses field, we depict the main results available at the present time.
This study deals with a specific test device especially designed to perform tests on HBC fuse on a scale of a non industrial laboratory. In fact it is not possible for most of academic laboratories to build up a device supplying the same current and voltage ranges as in an industrial test station. Moreover the capacitor bank discharges are often used in(More)
This works deals with calculations of pre-arcing time prediction for fuse links used in industrial protection circuits in case of heavy faults-currents. An enthalpy method to solve heat-transfer equation included two phase-changes is presented. The mathematical model couples thermal and electrical equations based on the principle of energy conservation and(More)
During the HBC fuse working, the fault current implies the initiation of an electric arc which is composed of metallic species vapours mainly, generally silver. This defines the end of the pre-arcing time. This electric arc interacts quickly with the surrounding silica sand grains or quartz sand. Thus a silver plasma is formed around the reduced sections of(More)
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