| 摘要 |
<p>PURPOSE:To reduce an arrangement space for an interphase connection conductor and its connection part and to simplify a structure of an external connection part by a method wherein an extraction conductor introduced into an oil connection box via a connection part, the interphase connection conductor and a terminal row of a terminal board are connected to be conductive on the inside of the oil connection box. CONSTITUTION:Out of in-phase antiparallel connections of a DC winding when electric power is supplied to a DC arc-furnace load by combining a transformer 10 and a rectifier device 20, an extraction conductor 12 of the DC winding, an interphase connection conductor 110 and a transformer-side terminal row 17 are connected inside an oil connection box 15 protruding on a transformer main-body tank 3. As a result, the interphase connection conductor 110 and its connection part are cooled efficiently by an insulating oil; a cross-sectional area of a conductor can be reduced; an interval between connection conductors is reduced; accordingly, the oil connection box 15 can be formed in a small size. Thereby, an arrangement space of the connection part occupied on the transformer main-body tank can be reduced, and a structure of an external connection part can be simplified furthermore.</p> |
