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Engine: Electricity

Question 592 of 1,386

In figure "4" of the diagram in the illustration, the three phase step down power transformer has a turns ratio of five to one. If a three-phase 4160 volt supply is connected to terminals "A1-B1-B2", what voltage should develop across terminals "A2- B2-C2"? Illustration EL-0084

USCG illustration EL-0084 for Engine Electricity question 592
Illustration EL-0084
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Comments from mariners who studied this question.

sa sailorpip · Dec 29, 2014
I didn't know it was even possible to feed both sides of a transformer simultaneously? I don't understand the formula, mechanics, or purpose of connecting to A1-B1-B2, and I also don't see a reference to this question in the USCG Electricity question databank, so perhaps this is a typo?
ma maritimesailor · Oct 8, 2015
The Answer here is 832 Volts. Does anyone maintain this website?
Sh Shawn · Oct 10, 2015
Maritimesailor,

Sorry you disagree with the Coast Guard answer, I can't control that. This is the latest and up-to-date question and answer released by the NMC. Please forward your comments to the NMC at iasknmc@uscg.mil. USCGQ is as up-to-date as much as the NMC can give us.