Today, with the developing technology, the use of devices containing electronic components is becoming widespread in every field. In particular, uninterrupted power supplies (UPS), motors used in industrial plants, non -linear circuit elements (transistor), such as rejectionors, cause high frequency currents or DC currents to be withdrawn from the grid. In case of leakage currents containing high -frequency leakage current or DC component in the system, the commonly used AC type or type A type leakage current protection switches cannot make the necessary protection due to the structure. B Type Illegal Current Conservation switches, which offer a wide range of protection against leakage currents, are safely used in all industrial applications where A and AC type leakage current protection switches are insufficient.