An Analysis through Test on Internal Discharge Positions of 220kV Potential Transformer
The potential transformer of phase C of section I of 220kV bus sent out an abnormal voltage signal with fault of the secondary voltage falling. Based on the disassembly check and adopting the corresponding test method, the internal fault discharge position was found out.
abnormal voltage drop of potential transformeroil Chromatographic analysisdisassembly checkdischarge of primary winding
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