1,10kV, S9 ,3 phase oil immersion power transformer 2,high efficiency,low loss 3,Low losses and Low Noise Describtation of the product ... made of high-quality cold-rolled silicon-steel plate.High-voltage winding group is made up of high-quality oxygen-free ... % ,6% or others in accordance to client needs;8)Tapping voltage regulation type: off-load or on-load;9)Tapping range ...