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| Defect analysis of a fully sealed 35kV transformer |
| Yu Xiaoxiang |
| State Grid Fujian Electric Co., Ltd, Maintenance Branch, Fuzhou 350001 |
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Abstract The heavy gas protection of a fully sealed 35kV transformer acted, then the transformer tripped. By oil chromatogram test, insulation test, DC resistance test, current transformer ratio test and disintegration, we deduced a conclusion that the transformer’s high voltage winding had inner-turn short circuit problem. Then we propose the preventing measures for this kind of fault.
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Received: 09 November 2019
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2020, Vol. 21 
