CHENG Sheng, CHEN San-yun, MA Qiang, et al. Case Analysis of Over Standard of Low Voltage Short Circuit Impedance in Transformer Test[J]. High voltageapparatus, 2009, 45(2): 108-111.
CHENG Sheng, CHEN San-yun, MA Qiang, et al. Case Analysis of Over Standard of Low Voltage Short Circuit Impedance in Transformer Test[J]. High voltageapparatus, 2009, 45(2): 108-111.DOI:
where the deviation between the voltage on impedance and the voltage on nameplate exceeds the specified range in short circuit impendence measuring during acceptance tests of the transformers.The causes of the deviation are analyzed
and the diagnosis procedures of the winding shift and deformation before transformer operation are introduced.In addition
the judging principle of the reactance method is proposed
and some suggestions about entire inspection and management for new transformers are offered.