... ISO 1,15kV, S11 ,3 phase oil immersion power transformer 2, aluminum or copper Winding 3, high efficiency, low loss 4, low ... winding group is made up of high-quality oxygen-free copper lines and it adopts multilayered drum type structure. All fasteners ... 7595-1987 JB/T 3837-1998 Technical Data:1) Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, 10KV, 10.5KV ...