| 摘要 |
PURPOSE:To make the configuration compact and to improve economy by per- forming rational winding arrangement. CONSTITUTION:Two low voltage windings 1 and 2 are concentrically arranged at the outside and the inside of a high voltage winding 3 one by one. The high voltage winding 3 is formed in a multiple cylinder winding shape. A high voltage winding line lead U is arranged at the inside, and a neutral point lead O is arranged at the outside. So called graded insulation is adopted. Namely, the insulating grade of the neutral pointlead O ls lower than the of the line lead U. Therfore the requirement for equalizing the percent impedance between the inner low voltage winding 1 and the high voltage winding 3 with the percent impedance between the outer low voltage winding 2 and the high voltage winding 3 is satisfied. |
