S9.S11 Distribution tranformers 1.voltage transformer 30-2500KVA 2.S9,SCB 35KV,10KV,11KV/415V, ... 22KV,33KV 35KV,36KV3)Rated LV: 0.4kV,0.415KV,0.38KV4)Phase No. :single or three;5)Rated frequency: 50Hzor 60 Hz;6 ... off-load or on-load;9)Tapping range: +/-2*2.5% / 5%or others in according to client needs;10)Cooling type ... .2990.43150025.21180.4more than 3150kVA,the maximum tap current occurs at -5% position