100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RLS=0.008Ω RHS=2.6Ω Rfe-HS=5000Ω XLS=0.015Ω XHS=5.2Ω Xm,HS=8800Ω Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor. Determine the following: a) The equivalent impedance of the transformer referred to primary. b) Input impedance of the combined transformer and load. c) Actual input voltage at HV side. d) Input impedance if load is disconnected. e) Exciting current at no load
100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RLS=0.008Ω RHS=2.6Ω Rfe-HS=5000Ω XLS=0.015Ω XHS=5.2Ω Xm,HS=8800Ω Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor. Determine the following: a) The equivalent impedance of the transformer referred to primary. b) Input impedance of the combined transformer and load. c) Actual input voltage at HV side. d) Input impedance if load is disconnected. e) Exciting current at no load
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 3.63P: A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a...
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100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RLS=0.008Ω RHS=2.6Ω Rfe-HS=5000Ω XLS=0.015Ω XHS=5.2Ω Xm,HS=8800Ω Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor. Determine the following: a) The equivalent impedance of the transformer referred to primary. b) Input impedance of the combined transformer and load. c) Actual input voltage at HV side. d) Input impedance if load is disconnected. e) Exciting current at no load.
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