The switch-disconnector , also called a voltage disconnector , has the same functions as a switch, but on a larger scale: it is in fact responsible for cutting off the flow of energy to power plants. It is responsible for cutting off the flow of energy to the plant, which serves above all to guarantee the safety of the plant and, above all, of the people who work there, since one of its particularities is to separate the flow of energy of the working environment. Another special feature of this instrument is its ability to detect faults in the electrical flow and isolate them. Once the fault has been corrected, the switch-disconnector ensures that current flows normally again.