THREE PHASE TRANSFORMER

摘要

PURPOSE:To improve area occupancy rate, transfer efficiency and iron core utilization rate, etc. by a method wherein the low voltage windings of the first transfer unit wound by the low voltage windings of the phase corresponding to the legs of each phase and the high voltage windings on the line end side as well as the second transfer unit wound by low voltage windings and high voltage windings on the neutral point side are connected in parallel while the high voltage windings are connected in series. CONSTITUTION:A three phase transformer is composed by means of separately transferring the first transfer unit 31 and the second transfer unit 32 and connecting with each other at site. The first transfer unit 31 containing the low voltage windings 13 of the phase corresponding to the main legs of each phase of the three phase five leg iron core 1 (main leg 3 of U phase is shown in figure) and the wound high voltage windings 11 on the line end side while the second transfer unit 32 contains the tap windings 16 of the phase corresponding to the main legs of each phase of the second three phase five leg iron core 2 (main leg 4 of U phase is shown in figure) the tertiary windings 15 and the wound low voltage windings 14 and high voltage windings 12 on the neutral point side. Then the low voltage windings 13, 14 are connected in parallel while the high voltage windings 11 on the line end side, the high voltage windings 12 on the neutral point side and the tap windings 16 are connected in series.