Determination of electrical making instants using load voltage for coupled loads

A device connected to a switching device and comprising a processor, wherein the processor is configured to:

• obtain a measured terminal voltage of each phase of one or more phases of an electrical equipment from a voltage measuring device, during an energization operation of the electrical equipment through the switching device, wherein the phases of the electrical equipment are electrically or magnetically coupled to each other;
• obtain circuit configuration parameters associated with the electrical equipment;
• determine a processed voltage for the one or more phases of the electrical equipment based on one or more of the measured terminal voltages of the electrical equipment and a mapping table, wherein the mapping table comprises a mapping between the circuit configuration parameters and a computation to be performed on one or more of the measured terminal voltages;
• and
• determine an electrical making instant of a pole of the switching device associated with a phase of the one or more phases based on the processed voltage for monitoring energization operation of the electrical equipment as an instant corresponding to a start of a rising slope of the processed voltage, when the rising slope crosses a pre-determined phase-wise threshold value to reach a first voltage peak.