Most electric and electronic devices will destroy themselves if you let them. Since they can ot distinguish between normal loads or overloads, they will just keep drawing more current as the load increases – until they burn themselves out.
Protective devices for electric equipment and circuits act as survival kits. Because of the
steadily increasing power being fed into transmission lines, these guardians must often respond fast to protect equipment and branch circuits. Suppliers of protective devices provide a diverse selection of devices to handle the spectrum of traditional protection needs, as well as innovative designs for newer applications with their rapidly changing requirements.
Basically, the “choice of protection” is about magnetic circuit breakers, a class of protector in which the breaking of the circuit is a function of current only. We do place in
proper perspective the value of, and need for, other devices like fuses and thermal breakers, which, when correctly utilized, serve useful functions. accreditations required.