Three of a 15 kVA, 2200:220 V, 50 Hz transformer are connected in A-A to supply at 220 Volts line-to-line a three-phase induction motor load of 20 kVA. The power factor of the induction motor is 0.85. The load is connected to the transformers by means of a common three-phase feeder whose impedance is 0,03+j0,06 Q/phase. The transformers themselves are supplied from a constant-potential source by means of a three-phase feeder whose impedance is 2,5+j6,0 Q/phase. The equivalent impedance (R";-R2)+j(X"1+X¢2)) of one transformer referred to the low-potential side (secondary) is 0,4+j0,5 Q/phase. The magnetizing inductance and the resistance representing the core loss are neglected. Calculate the required source line voltage (Vs) if the load line voltage is 220 Volts.

Three of a 15 kVA, 2200:220 V, 50 Hz transformer are connected in A-A to supply at 220 Volts line-to-line a three-phase induction motor load of 20 kVA. The power factor of the induction motor is 0.85. The load is connected to the transformers by means of a common three-phase feeder whose impedance is 0,03+j0,06 Q/phase. The transformers themselves are supplied from a constant-potential source by means of a three-phase feeder whose impedance is 2,5+j6,0 Q/phase. The equivalent impedance (R";-R2)+j(X"1+X¢2)) of one transformer referred to the low-potential side (secondary) is 0,4+j0,5 Q/phase. The magnetizing inductance and the resistance representing the core loss are neglected. Calculate the required source line voltage (Vs) if the load line voltage is 220 Volts.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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