Abstract:Transformer energization at random point presents inrush phenomena and is unfavorable for equipment due to high magnitude asymmetric current flow. These asymmetric currents are largely affected by level and polarity of residual flux presents in transformer core post its de-energization. Controlled switching technology is widely used to limit inrush current. Moreover, ignorance of residual flux would yield only moderate level of inrush current. Also, inaccurate estimation of de-magnetization status leads to imp… Show more
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