The TPU 4x.xx transformer are casted in epoxi resin and designed for insulation voltages from 3.6 kV to 12 kV or 17.5 kV (for rated currents till 1250 A). Modification of primary terminals or insulation barries designed for specific switchboard designs may be agreed between the manufacturer and the customer. The transformer are manufactured in conformitif with dimension stared hereunder. The TPU 4x.xx transformer are designed as single-turn or multi-turn version, with one transformer ratio or with windings having the possibility to be reconnectible on turn primary or on the secondary side.