Patent ID: 8866486

Claim:
A device for detecting and locating at least one electric discharge in electrical equipment insulated by fluid contained in an electrically-conductive housing, the electrical equipment including a plurality of grounding lines located outside the electrically-conductive housing, said grounding lines being connected between the housing and ground and distributed along the housing, the device comprising: a plurality of current detectors of Rogowski coil type; and means for synchronously comparing signals delivered by the current detectors to locate the electric discharge; wherein the coil of each of the detectors is placed outside the electrically-conductive housing and around a respective one of the grounding lines connected between the housing and ground, each detector delivering a signal representative of current flowing in the grounding line, occurrence of an electric discharge giving rise to a sudden variation of the current, the electric discharge being located within a zone inside the housing and situated in proximity of the grounding line that is surrounded by the current detector that was first to deliver the sudden variation representative of the electric discharge.