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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 trasfer 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.

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    QuickField 6.4