Patent ID: 8014111
Filing Date: 2011-09-06
Classification: H02H

Abstract:
1. A method of fire prevention from faults in electric networks or electric installations containing measurement of electric current of a controlled section, the method comprising: forming a signal of a first harmonic and of a second and higher harmonic from a spectrum of a measured current; measuring at least one of a short-circuit current measurement an overload current, a creeping current, or an electric network voltage, the short-circuit current and the overload current measured by allocation of a first harmonic signal out of the measured electric current of the controlled section, and at least one of the creeping current measurement or the electric network voltage measurement performed by at least one of a connection of a leakage current sensor, or feeding to the device the electric network voltage or electric installation voltage; and measuring, for sparking a current determination, a quantity of a pulse amplitude at at least one of a forming stage, a dying stage of a cycle of arc striking-extinction, or a pulse quantity of a forming stage of a cycle with an admissible amplitude.