... Transformer, Power Supply, Electrical EquipmentStandardsGB1094.1~2-1996GB1094.3,.5-2003GB/T6451-1999Service conditions 1) Altitude: ≤1, 000m ... structure enhances the ability agaist short circuit5.Hermetic radiator oil tank, reduced volume and prolonged service life6.Special ... Ring TransformerPrimary voltage: 6, 6.3, 10, 10.5, 11kVTapping range: ±5%Secondary voltage: 3, 3.15, 6.3kVConnection group ...