| 摘要 |
<p>PURPOSE:To avoid the variation of the tertiary terminal voltage in accordance with the position of the tap by a method wherein the 1st series winding, a branch winding and a tertiary winding are wound around a main leg of the 1st core and at the same time the 1st exciting winding connected to the tertiary winding in parallel and a tap-winding are wound around a side leg of the core and the 2nd exciting winding and the 2nd series winding are wound around the 2nd core. CONSTITUTION:One end of the 1st series winding 7 is connected to a high voltage line terminal U and another end is connected to one end of a branch winding 8 via a series winding 14 of a series transformer 15 and at the same time connected to an intermediate voltage line terminal (u). Another end of the branch winding 8 is connected to a neutral terminal V. The 1st exciting winding 11 is connected to terminals (a) and (b) of a tertiary winding 9 so as to be in parallel to the tertiary winding 9. A tap-winding 10 is provided and connected to the 2nd exciting winding 13 via a required position of the tap. The area enclosed by a dot line 12 shows the main transformer proper and the area enclosed by a dot line 15 shows the series transformer proper. With this constitution, the terminal voltage of the tertiary winding 9 is kept constant regardless to the position of the tap of the tap-winding 10.</p> |
