Influence of the filling material properties on pressure in HBC fuse. Comparison between experimental results and simulation.

By varying the mean granulometry and the packing density of the arc quenching material (silica sand), we show the influence of the silica sand morphometric properties on the pressure evolution during the HBC fuse working. Pressure measurements are made using piezoelectric transducers inserted at various lengths taken from the fuse strip plane. The measurements are compared with the results get from the simulation of the energy withdraw within a granular material. Both types of results show that the pressure evolution is strongly correlated with the electric power evolution and the morphometric properties