Physics · Electrical Machines
How can three identical single-phase autotransformers be interconnected to form a three-phase star-connected autotransformer system?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1By connecting the primary of each transformer to one phase and leaving their secondaries completely isolated
- 2By magnetically coupling the cores of all three single-phase transformers without any electrical connections
- 3By interconnecting the common terminals of the three single-phase autotransformers to form a neutral point, and connecting the remaining terminals to the three phases of the supply✓
- 4By connecting the primary windings of all three transformers in parallel and secondary windings in series
Correct answer
By interconnecting the common terminals of the three single-phase autotransformers to form a neutral point, and connecting the remaining terminals to the three phases of the supply
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