NM CID EL-1 Practice Questions - New Mexico CID EL-1 Electrical Distribution Systems, Including Transmission Lines Examination Exam

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Two identical single-phase transformers are connected open-delta to serve a three-phase load. The bank's usable three-phase capacity is approximately what fraction of a closed-delta bank made of three of the same units?

33 percent 50 percent 57.7 percent 86.6 percent of the closed-delta bank

Correct Answer:

57.7 percent

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