This is an example of the safety fuse simulation, performed with QuickField software.
Plane problem of heat transfer.
Conductor diameter: 2 mm;
Conductor melting point T = 1050 °C;
Nominal current I = 15 A.
Determine the operating time at short-circuit current of 40 A.
Fuse temperature vs. time:
Fuse will terminate the current in 5.5 sec.