| 摘要 |
<p>PURPOSE:To enable miniaturization and the reduction of a manufacturing price by containing iron cores and windings corresponding to those of two pairs in a tank, by connecting two primary windings in parallel and by connecting to a primary line with three bushings. CONSTITUTION:The primary winding 17 and the secondary winding 16 for a main transformer are wound around the first iron core leg 12, the primary winding 19 and the tertiary winding 18 for the main transformer are wound around the second iron core leg 13, the primary winding 21 and the secondary winding 20 for a teaseat transformer are wound around the third iron core leg 14 and the primary winding 23 and the tertiary winding 22 for the teaseat transformer are wound around the fourth iron core leg 15. The primary windings 17, 21 wound around the first iron core leg 12 and the third iron core leg 14 and the primary windings 19, 23 wound around the second iron core leg 13 and the fourth iron core leg 15 are separately Scott-connected and only the terminals U, V, W to be connected to the lines of two pairs of primary winding groups are connected in parallel. This satisfies leakage impedance characteristics, removes the trouble in operation, can reduce the insulation grade of the secondary and the tertiary windings and the circuits to a half, enables miniaturizaiton and light weight and can reduce the manufacturing price.</p> |
