Main >> Applications >> Sample problems >> Fuse current limiter
Fuse current limiter
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.
