A 20-kVA 8000/277-V distribution transformer has the following resistances and reactances: R, -32Q X, -45 Ω R, -0.05 X, -0.062 R-250 k The excitation branch impedances are given referred to the high-voltage side of the transformer. (a) Find the equivalent circuit of this transformer referred to the high-voltage side. X - 30 k (b) Assume that this transformer is supplying rated load at 277 V and 0.8 PF lagging. What is this transformer's input voltage? What is its voltage regulation? (e) What is the transformer's efficiency under the conditions of part (c)?

A 20-kVA 8000/277-V distribution transformer has the following resistances and reactances: R, -32Q X, -45 Ω R, -0.05 X, -0.062 R-250 k The excitation branch impedances are given referred to the high-voltage side of the transformer. (a) Find the equivalent circuit of this transformer referred to the high-voltage side. X - 30 k (b) Assume that this transformer is supplying rated load at 277 V and 0.8 PF lagging. What is this transformer's input voltage? What is its voltage regulation? (e) What is the transformer's efficiency under the conditions of part (c)?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 63PE: A precision laboratory resistor is made of a coil of wire 1.50 cm in diameter and 4.00 cm long, and...

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