SCB14 all-sealed oil-immersed power transformer has the advantages of low loss, low noise and high efficiency. It can achieve good energy saving effect and reduce pollution. Totally enclosed compared with ordinary oil-immersed transformer, cancelled the oil storage tank, the oil volume change, by corrugated tank elastic corrugated chips to automatically adjust the compensation,transformer isolated from the rest of the air, to prevent and slow the deterioration of oil and insulation aging, enhance the operation reliability, the normal operation of the free maintenance.