... Up and Down Transformer,Up Down Transformer 1.3Ph,10~35kV/0.4~10kV 2.30kVA~20MVA 3.S9~S13 class optional Step Up and ... Down Transformer, Up Down TransformerService conditions 1) Altitude: ≤1, 000m 2) ... ability agaist short circuit5.Hermetic radiator oil tank, reduced volume and prolonged service life6.Special securing structure, no drifting during ...