| 摘要 |
PURPOSE:To obtain a deterioration-degree judgment method wherein a local overheating temperature can be judged by analyzing a very small amount of a synthetic oil sample from an electric apparatus as an object to be diagnosed as will as the deterioration degree and the remaining life of a main material can be judged. CONSTITUTION:A synthetic oil as a specimen is sample from an electric apparatus which is filled with the synthetic oil; a prescribed low-molecular-weight component in the synthetic oil as the specimen is analyzed quantitatively; the concentration ratio of each low-molecular-weight component to a specific low-molecular-weight component is found from an alalytical result which has been obtained. The concentration ratio is collated with a judgment curve which has been found in advance with reference to the synthetic oil of the same kind; a temperature in a heat-generating part at the inside of the electric apparatus is judged. When the synthetic oil is a silicone oil, only 3D out of low-molecular-weight components 3D, 4D, 5D, 6D displays a saturation characteristic. As a result, when the 3D is regarded as the specific low-molecular- weight component and the concentration ratio is found, a judgment curve having a pattern which is peculiar to the silicone oil can be obtained. |
