... TransformerService conditions 1) Altitude: ≤1, 000m 2) Maximal ambient temperature: +40.C3) Maximal ... Minimal ambient temperature: -25.C6) S9-M-630~10000/10Special conditions according to users ... M-630~10000/10 Electric Power Distribution TransformerPrimary voltage: 6, 6.3, 10, 10.5, 11,35kV,Tapping range: ±5%Secondary voltage: 3, 3 ...