(a) A 5 MVA 230/11.5-kV single-phase power transformer has a per-unit resistance of 1.5% and a per-unit reactance of 6% (data taken from the transformer's nameplate). The transformer approximate equivalent circuit is given in the figure below. The open-circuit test performed on the low-voltage side of the transformer yielded the following data: Voc = 120 kV loc = 12 A Poc = 40 kW Refer to the low-voltage side of the transformer and calculate: (1) The value of Req and Xeq. (ii) The value of Rc and Xm. (iii) The voltage regulation when secondary voltage Vs = 11 kV and the secondary current Is = 350 A. Rea

(a) A 5 MVA 230/11.5-kV single-phase power transformer has a per-unit resistance of 1.5% and a per-unit reactance of 6% (data taken from the transformer's nameplate). The transformer approximate equivalent circuit is given in the figure below. The open-circuit test performed on the low-voltage side of the transformer yielded the following data: Voc = 120 kV loc = 12 A Poc = 40 kW Refer to the low-voltage side of the transformer and calculate: (1) The value of Req and Xeq. (ii) The value of Rc and Xm. (iii) The voltage regulation when secondary voltage Vs = 11 kV and the secondary current Is = 350 A. Rea

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 3.16P: A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters:...

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