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Fuse current limiter

fault current limiter temperature

Problem Type
3D problem of DC conduction, heat transfer

Geometry

Given
Electrical conductivity of the copper: γ = 56 MS/m
Rated current I = 100 A
Thermal conductivity of the porcelain body = 2 W/K-m
Ambient 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
  
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