Designing Double Cut-out fuse for Increasing the Maneuver Speed of Economical 20 kV Radial Distribution Networks

Cut-out fused are used on connection points to reduce the faults of the main line, isolating the connected parts, or protecting the customers at the end of the feeders. When supplying load from the end of such sources is desired, the amperage of such cut-out fuses need to be increased appropriate to a raise in the load. It is also necessary to disconnect all three cut-out fuses. At times, the feeder is turned off which does not increase Energy not Supplied (ENS). Using the proposed method, it is not needed to apply interruption on feeders and the amperage of fuses can be increased or decreased. The use of cut-out fuse with the ability to disconnect under load or load booster will cause outage after cut-out. The cut-out fuse will not tolerate additional flow (if short-circuit happens) and its useful life will decrease. In case of using a double cut-out fuse, no outage is needed and one can simply decrease or increase the fuse amperage without non-distributed energy. Finally, the plan carried out on the feeder of Golzar Bardsir will be examined

Keywords:

Cut-out , Sectionalizer , Energy not Supplied , Increasing maneuver speed , fault , economical , Radial Distribution