Computer modelling of HBC fuses and their co-ordination with power electronic devices for sinusoidal and non-sinusoidal short-circuit fault conditions

Electro-thermal models for HBC fuses and power electronic (PE) switching devices, based on the SPICE simulator and device manufacturers conventional test data, are introduced. The simulations permit coordination of fuse-PE device protection, under sinusoidal and nonsinusoidal short-circuit fault conditions, based on computing PE device junction temperature. Simulations of conventional fuse short-circuit symmetrical AC faults are compared with results obtained from short-circuit tests. Results are also given for a three-phase half-wave rectifier as an example application of the methodology for nonsinusoidal circuits and faults