Today circuit breakers have become absolutely essential device for every home and office. These automatically operated devices are one of the most important safety mechanisms required for your home and office. The primary function of this automatically-operated electrical switch is to protect electrical circuits from damage caused due to short circuit or overload. The basic function of a circuit breaker is to detect a fault condition. Once a faulty condition is detected, contacts present in the breaker opens up to interrupt the circuit. Unlike a fuse, which has to be replaced, a breaker can be reset (either automatically or manually) to restore normal operations. These devices can be classified as low voltage breakers (less than 1000 VAC), medium voltage breakers and high voltage breakers. http://amplify.com/u/a1j8hw