| 摘要 |
A polyphase regulating transformer device has a main transformer, a tertiary winding in the main transformer and a series transformer with its secondary winding connected in series with the output of the main transformer. The tertiary winding is connected to excite the primary of the series transformer, and is itself composed of a fixed winding section and a tapped winding section both being connected in series at a neutral point through a tap changer; the primary phase windings of the series transformer are not provided with any interphase connections and are insulated from one another. A condenser bank is connected for power factor improvement across terminals of the fixed winding section of the tertiary.
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