what are fuses and circuit breakers and how are they different?

Question

anonymous · Answer

www.wisegeek.com/what-is-the-difference-between-a-fuse-and-a-circ...

anonymous · Answer

that might help

anonymous · Answer

A circuit breaker has a bimetallic strip that is sensitive to heat. For small current overloads, the heat generated causes one of the metals to expand at a different rate than the second metal, and bends the strip downward to release a lever. For large current surges, a small electromagnet with wire loops pulls the strip down to release the lever.
A fuse has a metal filament that melts when exposed to extra heat generated by currents higher than what the fuse is rated for. The melted filament breaks the circuit path.

Both circuit breakers and fuses protect wiring by preventing overloads of current from continuing to pass through electrical circuits. However, breakers and fuses differ in how they work.