(a) Draw (neatly) a phasor diagram showing the three, primary line-to-line voltages and the six secondary phase and line voltages. What is the phase relationship between the primary voltage VAn and the secondary voltage V12? Indicate on the phasor diagram. (b) Determine the apparent power rating of each single-phase transformer required for this application. (c) Determine the nameplate voltage ratings of cach single-phase transformer required for this application. (d) Determine the primary (HV) coil and line currents (magnitudes only) when the 3-ph transformer bank is delivering 120 kVA at 575 Vu.
(a) Draw (neatly) a phasor diagram showing the three, primary line-to-line voltages and the six secondary phase and line voltages. What is the phase relationship between the primary voltage VAn and the secondary voltage V12? Indicate on the phasor diagram. (b) Determine the apparent power rating of each single-phase transformer required for this application. (c) Determine the nameplate voltage ratings of cach single-phase transformer required for this application. (d) Determine the primary (HV) coil and line currents (magnitudes only) when the 3-ph transformer bank is delivering 120 kVA at 575 Vu.
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 3.26P: A bank of three single-phase transformers, each rated 30MVA,38.1/3.81kV, are connected in Y- with a...
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