continuous detection device of breaking electric insulation of a high voltage cable and detection METHOD

The present invention relates to a detection device (D) continuously breaking electrical isolation between a high voltage cable (10a, 10b) and an electrical ground (C), the high voltage cable being connected on one side to a current generator for high voltage (10) and on the other side to a utilization device (20) of said high voltage, and generating a parasitic capacitance Cp with the electrical ground. According to the invention, said detection device (D) comprises: • at least one electrode (40a, 40b) situated at a distance (e, d) of the high voltage cable, forming an additional capacitor Ca with said high voltage cable and electrically connected to, • means for measuring (30) a measured capacitance Cm between said electrode and the electrical chassis (C), connected to, • comparison means (50) between the value of the measured capacitance and a threshold value (Cth) pre-stored, connected to, • means for generating (70) an alert message if the value of the measured capacitance exceeds the threshold value, meaning breaking electrical insulation of said cable high voltage, • the value of the measured capacitance Cm being equal to: