Thermal analysis of fuses with variable cross-section fuselinks

This paper describes a thermal model of fast fuse suitable for power electronic circuits. This model can be used to analyse the thermal behaviour of the fuselink during steady-state conditions when different types of notches are applied. Results from mathematical models have been compared with those from 3D thermal models using software based on the finite element method and from experimental tests. The temperature values from thermal simulations and experimental data are very similar those coming from mathematical models.

► This paper describes a thermal model of fast fuse suitable for power electronic circuits.
► The model can be used to analyse the thermal behaviour of fast fuses during steady-state conditions when different types of notches are applied as rhombic, constant and circular types.
► There are also a 3D thermal models using a software based on the finite element method for the same types of notches (rhombic, constant and circular).
► The thermal models enable the users of fast fuses to choose the right ratings, to evaluate critical load cycles and to identify potential overload capacities.