Fuse current limiter - QuickField simulation example
Engineering question
How to find temperature rise in fuse current limiters?
Answer
Set up a 3D QuickField Steady-state Heat Transfer problem for a fuse current limiter and evaluate temperature rise from computed field results.
Typical applications
fuse current limiter elements, current-limiting fuses, protection fuse links
Download
- Download simulation files (files may be viewed using any QuickField Edition).
Simulation problem
Problem Type3D multiphysics problem of DC conduction coupled to Heat Transfer.
Geometry
Given
Electrical conductivity of the copper σ = 56 MS/m
Rated current I = 100 A
Thermal conductivity of the porcelain body = 2 W/K-m
Ambient air temperature T = +20°C.
Task
Calculate the temperature of the fuse
Solution
First the DC conduction electric problem is simulated to compute current density and losses in the elements. Then heat transfer problem is simulated.
Result
Current density distribution in the fuse.
Losses distribution: terminals 0.27W, fuse 1.9W, sticker 0.55W.
Temperature distribution in the fuse current limiter. Fuse central part temperature is 48°C.
Video
- Fuse current limiter. DC conduction
- Video: Fuse current limiter. Heat transfer. Watch on YouTube