| 摘要 |
<p>Provided is a diagnosis method for an oil-filled electrical apparatus (1), which is for evaluating the degree of danger of copper sulfide being generated within the oil-filled electrical apparatus (1), comprising: a first step for detecting a specific compound contained within insulating oil (55) inside the oil-filled electrical apparatus (1); a second step for evaluating the possibility of copper sulfide being generated inside the oil-filled electrical apparatus (1), on the basis of the result detected by the first step; and a third step for diagnosing the degree of danger of a malfunction occurring in the oil-filled electrical apparatus (1), on the basis of the evaluation result obtained in the second step. The specific compound contains dibenzyl disulfide and/or a reaction product of a radical resulting from dibenzyl disulfide, and
di-tert-butyl-p-cresol and/or a reaction product of a radical resulting from di-tert-butyl-p-cresol, or, di-tert-butyl-phenol and/or a reaction product of a radical resulting from di-tert-butyl-phenol.</p> |
