Fuse current limiter

QuickField simulation example

Problem Type
3D 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
  
• Download simulation files (files may be viewed using any QuickField Edition).