| 摘要 |
In an electrical three phase variable power supply fed by three phase alternating power and having a three coil adjustable autotransformer connected in wye across the power lines, the autotransformer having taps associated with each of its coils for adjustably connecting to different turns thereof, the power supply having at least one neutral joining the coils of the autotransformer, Zagreb circuit method of varying the power output of the power supply, the Zagreb circuit method comprising providing a supply transformer having a three coil primary, corresponding ends of said primary coils connected to the taps, respectively, and arranging the primary coils in relation to the autotransformer alternatively as follows:
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