Patent ID: 7636224

Claim:
Method for the protection against leakage currents generated in the supply of a load ( 16 ) connected to an electrical network ( 10 ), comprising the phases of: (i) obtaining a zero-reference value by acquiring one or more times a signal ( 90 u ) proportional to the leakage current without generating test leakage currents; (ii) generating a test leakage current and acquiring a corresponding signal ( 90 u ) proportional thereto as test-value; (iii) detecting the actual leakage currents and generating a signal ( 90 u ) proportional thereto; (iv) acquiring a signal ( 90 u ) proportional to the actual leakage currents and disconnecting the load ( 16 ) from the electrical network ( 10 ) when reaching a dangerous condition corresponding to an acquired signal ( 90 u ) of a magnitude greater than a limit value.