Circuit Breakers are devices that stop the electrical current of a circuit in the event of excess or very high voltage. Circuit breakers are handy, not only because they can protect against electrical fires but also because they can be reset. When a fuse blows out, it must be replaced each time, whereas circuit breakers are easily reset when tripped.Each appliance in your home receives electrical currents by way of electrical circuit breakers. Circuit breakers are considered to be either main o.