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Safety fuse

This is an example of the safety fuse simulation, performed with QuickField software.

Problem Type:
Plane problem of heat transfer.

Geometry:

safety fuse model

All dimensions are in millimeters.

Given:
Conductor diameter: 2 mm;
Conductor melting point T = 1050 °C;
Nominal current I = 15 A.

Problem:
Determine the operating time at short-circuit current of 40 A.

Solution:

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Result:

Fuse temperature vs. time:

Fuse will terminate the current in 5.5 sec.

Download Download simulation files.