Q1. a) Consider a single-phase transformer whose equivalent circuit is given below with primary and secondary turns of 1000 and 200 respectively. 16.ΧΩ 25. Υ Ω 4.YQ 5.Χ Ω 20 kV 50Hz 20.Χ ΚΩ 10 ΚΩ Fig 1: Transformer equivalent circuit (i) Draw the simplified equivalent circuit by referring series components on the primary side to the secondary giving all component values. (ii) The transformer is connected to a resistive load of 60. Y, calculate the current through the load. (iii) Given the load in part (ii) calculate the total loss in the transformer and hence the efficiency. Discuss whether the transformer is optimised for efficiency at this load.
Q1. a) Consider a single-phase transformer whose equivalent circuit is given below with primary and secondary turns of 1000 and 200 respectively. 16.ΧΩ 25. Υ Ω 4.YQ 5.Χ Ω 20 kV 50Hz 20.Χ ΚΩ 10 ΚΩ Fig 1: Transformer equivalent circuit (i) Draw the simplified equivalent circuit by referring series components on the primary side to the secondary giving all component values. (ii) The transformer is connected to a resistive load of 60. Y, calculate the current through the load. (iii) Given the load in part (ii) calculate the total loss in the transformer and hence the efficiency. Discuss whether the transformer is optimised for efficiency at this 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 3.26P: A bank of three single-phase transformers, each rated 30MVA,38.1/3.81kV, are connected in Y- with a...
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assume x and y are 0
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