The subject of fuses, sectionalizers and reclosers should be more properly discussed within the
context of the protective requirements of a distribution system since they are that system’s primary
protective devices.1 Since our concern here is primarily the transmission and generation elements
of the modern power system and not the distribution system, we will only touch upon some of the
distribution elements involved. Distribution is normally defined as the system level energizing the
final step-down transformer, i.e. the distribution transformer, serving the industrial, commercial or
residential customer