The role of fuses in appliance protection

More complicated appliances, performing more functions automatically, connected to larger capacity circuits capable of delivering destructive power under fault conditions, increase markedly the need for electrical protection. Dual-element fuses are recommended to provide complete protection to motor-driven appliances. Appliances with little thermal capacity should be provided with extremely fast-blowing fuses where everything is done to decrease the time delay instead of attempting to build it into the fuse. However the manufacturers´ time-current characteristics facilitate the selection of the proper fuse for a given appliance.