METHOD FOR DIAGNOSING ANOMALY OF OIL-FILLED ELECTRIC APPARATUS

PROBLEM TO BE SOLVED: To provide a technique capable of detecting anomalies of oil-filled electric apparatuses, on the basis of the state of generation of BTEX in insulating oils of the electric apparatuses and estimating the form of the anomalies (for example, by electric discharge or overheating). SOLUTION: An insulating oil is collected from an oil-filled electric apparatus as a sample. The contents of BTEX (benzene, toluene, ethylbenzene and xylene) in the sample are each measured to subsequently determine their distributions. The acquired contents and their distributions are each compared with and analyzed against the contents of BTEX and their distributions of a sample of which the form of anomalies is known to predict the presence or the absence of anomalies of the oil-filled electric apparatus and the form of the anomalies. It is preferable that each of the amounts of BTEX generated in the insulating oil be measured by solid phase micro extraction and gas chromatograph/mass spectrometry. COPYRIGHT: (C)2009,JPO&INPIT