Power apparatus, power transmission/distribution unit, and tripping method therefor.

摘要

Disclosed is a power apparatus in which there is a fear that a foreign matter in a housing (3) of the apparatus (1) containing an electric conductor (7) therein will be moved in the housing by an action of an electric field so as to induce an abnormality of insulation, the apparatus comprising: a first sensor (12a, 12b) for detecting an existence position of a foreign matter on the basis of a sound of collision of the foreign matter against the housing; a second sensor (13) for detecting partial discharge generated in the housing; and means (16) for receiving respective detection signals of the first and second sensors, judging the existence of insulation abnormality caused by the foreign matter inside the housing, and outputting a result of the judgment.