The oil-immersed electrical machinery and apparatus which has the diagnostic device and its diagnostic device in order to execute the diagnostic manner and that diagnostic manner of the oil-immersed electrical machinery and apparatus

摘要

As for this invention, temperature distribution inside the oil-immersed electrical machinery and apparatus is considered, applying to the diagnosis of the equipment which is actual in operation, it offers the diagnostic manner of the oil-immersed electrical machinery and apparatus which can do accurate diagnosis, furthermore, the insulating oil in the oil-immersed electrical machinery and apparatus (3) from component analysis value, it designates the offer of the manner which can do the diagnosis of that kind of oil-immersed electrical machinery and apparatus as purpose. As for this invention, the insulating oil (3) in the said insulating paper (2) surface resistivity of the most numerous precipitation region which the xanthation metal precipitates most at on, is diagnostic manner of the oil-immersed electrical machinery and apparatus which features that the point in time when it decreases to the surface resistivity management value which is configurated beforehand is judged as the abnormal generation time (2) to winding in the oil-immersed electrical machinery and apparatus which possesses the metal part which can be accustomed the insulating paper.