Marine Electrical Systems USCG Question #367 (Set 13)

Which of the listed figures shown in the illustration represents a three phase transformer connected in a wye-delta configuration? Illustration EL-0084

USCG Exam Illustration EL-0084
USCG Examination Diagram: Illustration EL-0084
Official USCG Answer & Rule Citation

Correct Answer: Option D — 4

Standard marine electrical prints designate figure 4 in illustration EL-0084 as a wye-delta three-phase transformer configuration, where the primary side is connected in star (wye) and the secondary in delta per IEEE 45 conventions.

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