Production, transmission and use of electrical energy makes it compulsory to protect electrical systems with circuit breakers against dangerous over -currents. Basically from the electric current produced as AC and DC, the DC correct current is a type of current that is formed by the flow of electrical loads from high potential to lower potential and does not change direction. AC current is a type of current that occurs as a result of the inductment of a tension on the conductor found in the variable magnetic field and the direction varies according to time.