| 摘要 |
PURPOSE: A three-phase four-line delta connected transformer is provided to achieve improved stability in harmonic wave and reduce ground faults. CONSTITUTION: A three-phase four-line delta connected transformer is characterized in that one of a primary winding and a secondary winding is produced into a pair of windings of three-phases(R,S,T), and a connection is accomplished into the relationship of a second R phase end-a first S phase end, a second S phase end-a first T phase end, a first R phase end-a second phase T end. As a consequence, the transformer has an intermediate point of R and S phases, an intermediate point of S and T phases, and an intermediate point of R and T phases.
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