D or d delta winding. WyeDelta is used in high voltage transmission and WyeWye is seldom used because of potential unbalance. Do You Know How To Calculate Three Phase Power Voltages And Currents In A System Connected In Delta Configuration Here Y Delta Connection Electricity Power This configuration of voltage sources is characterized by a common connection point joining one side of each source. Y transformer configuration . 0 to 12 phase displacement in terms of clock position in multiples of 30 see figure 2. In a wye configuration one end of each of the three windings is connected to form a neutral. Line losses are reduced because the higher voltage allows for lower amperage. Secondaries of transformers are often connected in Wye configuration to increase output voltage. The name derives from the shapes of the circuit diagrams which look respectively like the letter Y and the Greek capital letter Δ. Vector Group of Transformer. The resulting voltage distortion i...