Electrical Engineering · Transformers
In the parallel operation of three-phase transformers, stable load sharing and avoidance of circulating currents depend on specific compatibility criteria. Which of the following conditions is essential for successful parallel operation?
- 1Proper matching of voltage ratios, polarity, phase sequence, and vector group✓
- 2Different vector groups with varied capacities
- 3Equal kVA ratings alone without voltage matching
- 4Unequal secondary voltages to minimize circulating currents
Correct answer
Proper matching of voltage ratios, polarity, phase sequence, and vector group
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