By using the electromagnetic signature of a current, we visualise deformation phenomena. These changes are reliable signs of future incidents, as they indicate that one of the components consuming the current is starting to malfunction and this is producing disturbances in the signal. This method makes it possible to see and quantify the number and intensity of fluctuations, which gives an accurate view of the situation because only a few sinusoids are needed to visualise it.
The frequency observation of the electric current shows the decomposition of the signal into harmonics. Depending on the configuration and equipment, the appearance or absence of harmonic components in a current gives an objective indication of the operating quality of the devices supplied.