Circuit breakers are often used instead of fuses.
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Yes, no filler metal is used. Often used on thin metals, the metals are pressed together and electricity is used to heat the metals to a state they melt slightly and fuse together.
Fuses actually have a lower resistance that the wire or carrier that is carrying current to and from the fuse. The purpose of a fuse is so that it will burn out before the carrier burns out. When a fuse burns out it breaks the current and therefore no more electricity can pass through it until the fuse is replaced. You gauge the fuse for a little more current than you normally have traveling through the wire. If a power surge of electricity comes through the wire the fuse will burn out instead of damaging the electrical device that is plugged into or wired into the carrier.
Each fuse has its own rating. It will be marked on the fuse somewhere.
A fuse is used one time and replaced. A breaker can be re-set.
yes its used in transmission line.fuse normally used in peravitiu in all electrical systeam