The structure of oil transformer is generally more complete, performance is more reliable, under normal circumstances, oil transformer will not appear very bad, At the same time, the power transformer has the characteristics of low energy consumption, large capacity, and low price itself, so that the cheap oil transformer will not affect its function because of its low price. In particular, some relatively good dry-type power transformer plant, their product quality is guaranteed, and their prices can be pressed to the lowest, quite loved by the people