improvements introduced in monitoring system of dielectric state of high voltage equipments with cap acitive insulation, such as condensive bushings, current transformers, potential transformers and similar allow to detect quick evolution insulation deteriorations and to emit correspondent alarms, being also able to verify their consistency in order to avoid false alarms as well as to automatically disconnect the equipment in case of a critical deterioration; it also allows to monitor in real time the BPDs quipped condensive bushings state as well as the bushings applied in HVDC high voltage direct current.