| 摘要 |
PURPOSE:To shorten the connecting portions and reduce the loss and improve the characteristics by arranging bushings for three phases on three axis lines extended to three directions roughly forming a letter Y. CONSTITUTION:The group of the first bushings 5 of terminals u1, x1, u2 and x2, the group of the second bushings 5 of terminals v1, y1, v2 and y2 and the group of the third bushings 5 of the terminals w1, z1, w2 and z2 are arranged on the respecrive axis lines L1, L2 and L3 which are drawn on the side surfaces of a tank 4 facing bus-bars 6 and extended to three directions angles between which are approximately 120 deg.forming a letter Y in such a manner that the terminals are arranged to correspond to the adjacent phases. These first to third groups of the bushings 5 are delta-connected to the terminals u, v and w of the bus-bars 6 by conductors 11. Accordingly, as the low voltage bushings 5 are arranged separately on three directions roughly forming a letter Y on the side of the tank, the transformer can be made compact even if the number of the terminals is large. Moreover, as the bushings 5 which correspond to the three-phase bus-bars 6 arranged in triangle are arranged on the adjacent axis lines of three directions forming a letter Y, the length of the conductors 11 which connect between the bus-bars and the bushings can be reduced. |
