1)Energy saving oil immersed 3 phase transformer 2)Standards:GB1094.1~2; GB1094.3,5; GB/T6451-2008; 3)One year warranty Energy saving oil ... , S11 series boast lower no-load loss, dropped no-load current and prominent energy saving. In addition, the noise conforms to ... the transformer oil tank.Compared to S9 transformers, S11 series have average no-load loss dropped 30%, average no-load current dropped ...