发明授权
- 专利标题： Diagnostic method for oil-filled electrical device, diagnostic device for implementing the diagnostic method, and oil-filled electrical device provided with the diagnostic device
- 专利标题（中）： 充油电气设备的诊断方法，实施诊断方法的诊断装置以及配备诊断装置的充油电气装置
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申请号： US12996215申请日： 2008-08-18
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公开(公告)号： US08854068B2公开(公告)日： 2014-10-07
- 发明人: Eiichi Nagao , Kentaro Taninouchi , Noboru Hosokawa , Tsuyoshi Amimoto , Kozo Tachibana , Hirotaka Muto , Junji Tanimura , Satoru Toyama
- 申请人： Eiichi Nagao , Kentaro Taninouchi , Noboru Hosokawa , Tsuyoshi Amimoto , Kozo Tachibana , Hirotaka Muto , Junji Tanimura , Satoru Toyama
- 申请人地址： JP Chiyoda-Ku, Tokyo
- 专利权人： Mitsubishi Electric Corporation
- 当前专利权人： Mitsubishi Electric Corporation
- 当前专利权人地址： JP Chiyoda-Ku, Tokyo
- 代理机构： Buchanan Ingersoll & Rooney PC
- 国际申请： PCT/JP2008/064690 WO 20080818
- 国际公布： WO2010/021017 WO 20100225
- 主分类号： G01R27/14
- IPC分类号： G01R27/14 ; H01F27/14 ; G01N27/92 ; H01F27/40
摘要：
An object of the invention is to provide a diagnostic method for an oil-filled electrical device that considers a temperature distribution in the oil-filled electrical device and enables accurate diagnosis to be conducted even when the method is applied to diagnosis of an actually operating device, and further provide a method with which such diagnosis of an oil-filled electrical device can be conducted from a component analysis value of an insulating oil in the oil-filled electrical device. The invention is a diagnostic method for an oil-filled electrical device including in an insulating oil a metal part wrapped with insulating paper, and determines that a time when a surface resistivity of a maximum precipitation site where metal sulfide is most precipitated on the insulating paper reaches a preset surface resistivity management value is a time of occurrence of an abnormality.
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