Oil insulation transformer from 100 to 1250 kVA Primary winding insulation : 7.2 , 12, 17.5, 24 kV . Step-down transformer. Primary voltage : like rimary winding insulation . Secondary voltage : 3200 V . 5500 V (3.2 kV, 5.5 kV) Voltage tapping adjustable Option : Thermal prob, Thermometer, All coupling (1 phase/1 phase, 3/1, 3/2, 3/3...)