Fuseology - Cooper Industries

4 Electrical distribution systems are often quite complicated. They cannot beabsolutely fail-safe. Circuits are subject to destructive overcurrents. Harshenvironments, general deterioration, accidental damage or damage from natural causes, excessive expansion or overloading of the electrical distribution system are factors which contribute to the occurrence of suchovercurrents. Reliable protective devices prevent or minimize costly damageto transformers, conductors, motors, and the other many components andloads that make up the complete distribution system. Reliable circuit protectionis essential to avoid the severe monetary losses which can result from powerblackouts and prolonged downtime of facilities. It is the need for reliable protection, safety, and freedom from fire hazards that has made the fuse awidely used protective stresses.

5 Fuses are a universal protective device. They are used in power distribution systems, electronic apparatus, vehicles…and as illustrated, our space program.

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