5.In three-phase transformers, the high voltage star connection is preferred. This is so because in this case   A) The voltage on the star windings is lower than if they were in delta and this reduces manufacturing costs. B) The voltage on the star windings is higher than if they were in delta and this reduces manufacturing costs. C) The voltage on the star windings would be the line-to-line voltage of the system since it is a three-phase manufacturing transformer. D) THERE IS NO SOLUTION

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.34P: Three single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance...
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5.In three-phase transformers, the high voltage star connection is preferred. This is so because in this case

 

A) The voltage on the star windings is lower than if they were in delta and this reduces manufacturing costs.

B) The voltage on the star windings is higher than if they were in delta and this reduces manufacturing costs.

C) The voltage on the star windings would be the line-to-line voltage of the system since it is a three-phase manufacturing transformer.

D) THERE IS NO SOLUTION

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