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Reducing consumers' electricity supply time, reducing downtime in selection of the medium-voltage feeder faulty branch requires that the network be equipped with commanding devices, automation and modern primary switching equipment.The medium voltage automation system will be based on the degree that, each line, contributes to attract sanctions for unplanned interruptions, and by analyzing the causes that determine the interruptions in continuity of electrical energy supply in the past two to three years.The adopt...

The interruptions in electrical energy supply are unplanned events, determined by faults of the distribution network?s components, lightning strikes or unauthorized interventions in the distribution networks. Insulation faults, occurring in medium voltage networks, produce transient regimens with overvoltages/ overcurrents of very high values, produce large requests of network, switching equipments, generators and telecommunication systems. Because of this, the neutral point of the secondary transformer in the med...