Patent ID: 11942896
Assignee: SOCIETA' ELETTRICA S.R.L.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC H

Claim 13:
14. A method for protecting an electrical system having one or more modules, wherein the method comprises the following steps:
providing a protection switch and a protection device;
installing the protection switch and the protection device in a connecting branch which connects the one or more modules, wherein the protection device is programmed to generate a fault signal and transmit it to the protection switch in order to open the switch, wherein the step of installing includes the following sub-steps:
inserting a cable, defining the connecting branch which connects the one or more modules, into a first through hole of the protection device, the first through hole being defined by a first ring of ferromagnetic material forming a first sensor configured to generate a first signal, representing a current flowing through the cable;
adjusting the protection device by setting a first reference value of a first threshold comparator configured to receive the first signal downstream of a conditioning stage connected downstream of the first sensor,, wherein the step of installing includes a sub-step of connecting a second sensor to the cable defining the connecting branch, wherein the second sensor is configured to generate a second signal representing a direct current component of the current flowing through the cable, wherein the sub-step of adjusting the protection device includes setting a second reference value of a second threshold comparator configured to receive the second signal, and wherein the fault signal is generated as a function of the occurrence of both of the following conditions:
the first signal exceeds the first reference value of the first comparator,
the second signal exceeds the second reference value of the second comparator.