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.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Transcribed Image Text: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.
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