TRANSFORMER

摘要

PURPOSE:To provide a transformer of a low pressure two-circuit system, which has such an organization that it can be divided into three unit transformers and the covenience of transportation of each divided unit single-phase transformer is contrived and the dimension and weight of the full part is reduced. CONSTITUTION:The subject transformer is composed of unit single-phase transformers 4 through 6, and the core of the transformer 4, 2 or 4 legs and unit windings 15 and 16 for high tension and unit windings 25 and 26 for low tension 25 and 26 are wound around these legs. The cores of transformers 5 and 6 are respectively three legs, and unit windings 17 and 18 for low tension and unit windings 27 and 28 for high tension are wound around these legs. One end of the winding 15 and that of the winding 16 are connected in parallel to a high-tension terminal U in the transformer 4, and other ends of both winding are connected in series through ducts 34 and 35 to the windings 17 and 18. Other ends of windings 17 and 18 are connected in parallel through a duct 36 to a high-tension terminal V at the neutral point side. The windings 27 and 25 are connected in parallel to low-pressure terminals u1 and v1 and the windings 28 and 26 are connected in parallel to low-tension terminals u2and v2, and also connected to different generators. The windings 15, 16 and 25, 26 are constituted by about 1/6 phase components and windings 17, 18 and 27, 28 are constituted by about 1/3 phase components and dimensions and weights of transformers respectively are made equal. By this method, transformation loss is reduced and accuracy in temperature rise is also improved.