How does the use of a fuse wire protect electrical appliances?

(N/A) fuse wire is made of a material with a low melting point.
When the current flowing through the circuit exceeds the safe limit (due to overloading or short-circuiting),the heat generated $(H = I^2Rt)$ causes the temperature of the fuse wire to rise rapidly.
Once the temperature reaches the melting point of the wire,it melts and breaks the circuit.
This disconnection stops the flow of current,thereby preventing damage to the electrical appliances.