Huadian Technology ›› 2009, Vol. 31 ›› Issue (11): 56-57.

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Treatment of the transformer ironcore multipoint grounding fault

MA Yingjie   

  1. Huaneng Ningxia Daba Power Generation Corporation Limited, Qingtongxia 751607, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-11-25 Published:2009-11-25

Abstract: A fault of transformer ironcore multipoint grounding was introduced. The fault was be confirmed by three ratios method. Due to that the transformer can not outage, the treatment method of adding currentlimiting resistor was adopted. Then, not only the growth of the grounding fault was be inhibited, but also a nonplanned shutdown accident was be avoided.

Key words: transformer, iron-core, multipoint grounding, three ratios method