A device for self-adjusting an electrical threshold (Sth) for detecting an electric power consumption failure of an electric charge, the self-adjusting device comprising: a plurality of reference signals (SR 1, SR N) of increasing values according to a geometric sequence for which the product of two terms of equidistant order at both ends of the sequence equals a maximum reference power (Pref); the plurality of reference signals (SR 1, SR N) being representative of the variation of a supply signal of the electric charge; a setpoint signal (Sc) representative of the supply signal of the electric charge; a framing unit including: - a plurality of successive intervals (I 1, I N-1) of reference signals successively bounded by the terms of the geometric sequence of the plurality of reference signals (SR 1, SR N), - a measurement signal including the setpoint signal (Sc). - a plurality of binary output signals (SS 1, SS N-1), - logic signal processing means configured to assign to a first binary output signal (SS 1) of the plurality of binary output signals (SS 1, SS N-1) a binary state of belonging of the setpoint signal (Sc) to a first interval (I 1) of reference signals including a first term of the geometric sequence, at least one electrical switch (SW 1) configured to be controlled by the first binary output signal (SS 1) and configured to provide a reference signal (SR N) of the plurality of reference signals (SR 1, SR N) of a value of a second term of the geometric sequence, such that the first term and the second term are of equidistant order at both ends of the geometric sequence, the second term being representative of the electrical threshold (Sth) for detecting an electric power consumption failure of the charge. a plurality of reference signals (SR 1, SR N) of increasing values according to a geometric sequence for which the product of two terms of equidistant order at both ends of the sequence equals a maximum reference power (Pref); the plurality of reference signals (SR 1, SR N) being representative of the variation of a supply signal of the electric charge; a setpoint signal (Sc) representative of the supply signal of the electric charge; a framing unit including: - a plurality of successive intervals (I 1, I N-1) of reference signals successively bounded by the terms of the geometric sequence of the plurality of reference signals (SR 1, SR N), - a measurement signal including the setpoint signal (Sc). - a plurality of binary output signals (SS 1, SS N-1), - logic signal processing means configured to assign to a first binary output signal (SS 1) of the plurality of binary output signals (SS 1, SS N-1) a binary state of belonging of the setpoint signal (Sc) to a first interval (I 1) of reference signals including a first term of the geometric sequence, - a plurality of successive intervals (I 1, I N-1) of reference signals successively bounded by the terms of the geometric sequence of the plurality of reference signals (SR 1, SR N), - a measurement signal including the setpoint signal (Sc). - a plurality of binary output signals (SS 1, SS N-1), - logic signal processing means configured to assign to a first binary output signal (SS 1) of the plurality of binary output signals (SS 1, SS N-1) a binary state of belonging of the setpoint signal (Sc) to a first interval (I 1) of reference signals including a first term of the geometric sequence, at least one electrical switch (SW 1) configured to be controlled by the first binary output signal (SS 1) and configured to provide a reference signal (SR N) of the plurality of reference signals (SR 1, SR N) of a value of a second term of the geometric sequence, such that the first term and the second term are of equidistant order at both ends of the geometric sequence, the second term being representative of the electrical threshold (Sth) for detecting an electric power consumption failure of the charge.