Abstract: A method for protecting a power grid from an electrical fault, the electrical fault generating a first signal type and a second signal type, the power grid including an electrical power supply and an electrical device between which a contactor is arranged, the contactor being positionable in two states an open state, for which the electrical power supply is not electrically connected to the electrical device; a closed state, for which the electrical power supply is electrically connected to the electrical device; the method including detecting a signal of the first type; placing the contactor in the open state; verifying, during a predetermined time period, whether a signal of the second type appears; if a signal of the second type appears during the period, keeping the contactor in the open state; when no signal of the second type appears during the period, placing the contactor in the closed state.

Abstract: A method for monitoring a meshed current-return network on an aircraft, the meshed network including at least two sub-networks electrically connected by a plurality of electrical junctions, the method including: measuring a current intensity in at least one electrical junction in which a nominal current is circulating for given flight conditions of the aircraft; wirelessly transmitting the measured current intensity value; receiving the measured current intensity; comparing the measured current intensity with a reference intensity of the nominal current determined for the electrical junction for the given flight conditions; and diagnosing soundness of the electrical junction following the comparing.