A three-phase, 230 V, 72 kVA, 0.9 pf (lagging) load is suppliedby three 29 kVA, 1330/230 V, 60 Hz transformers connected inYd5 by means of a common three-phase feeder with an impedanceof 0.003+j0.015 ohms per phase. The transformers are suppliedfrom a three-phase source (substation) through a three-phase linewith an impedance of 0.55+j4.6 ohms per phase. The equivalentimpedance (Rsc+jJXsc) of one or the single-phase transformersreferred to the low-voltage side is 0.16+j0.32 ohms. (a) Deter-mine the required supply voltage if the load voltage is 230 V. (b)Determine the voltage regulation.Single-line diagram showing the substation, line, transformer,feeder and load.lineⒸ | +substationYd5feeder(a) Required substation supply voltage :(b) Voltage regulation: %.loadvolts.

Given, The single line diagram is shown below, Where,Feeder impedance, ZF=0.003+j0.015 Ω/phaseLine…

A three-phase, 230 V, 72 kVA, 0.9 pf (lagging) load is supplied by three 29 kVA, 1330/230 V, 60 Hz transformers connected in Yd5 by means of a common three-phase feeder with an impedance of 0.003+j0.015 ohms per phase. The transformers are supplied from a three-phase source (substation) through a three-phase line with an impedance of 0.55+j4.6 ohms per phase. The equivalent impedance (Rse + jXsc) of one or the single-phase transformers referred to the low-voltage side is 0.16+j0.32 ohms. (a) Deter- mine the required supply voltage if the load voltage is 230 V. (b) Determine the voltage regulation. Single-line diagram showing the substation, line, transformer, feeder and load. line substation ###### feeder Yd5 (b) Voltage regulation: (a) Required substation supply voltage : load volts.

A three-phase, 230 V, 72 kVA, 0.9 pf (lagging) load is supplied by three 29 kVA, 1330/230 V, 60 Hz transformers connected in Yd5 by means of a common three-phase feeder with an impedance of 0.003+j0.015 ohms per phase. The transformers are supplied from a three-phase source (substation) through a three-phase line with an impedance of 0.55+j4.6 ohms per phase. The equivalent impedance (Rse + jXsc) of one or the single-phase transformers referred to the low-voltage side is 0.16+j0.32 ohms. (a) Deter- mine the required supply voltage if the load voltage is 230 V. (b) Determine the voltage regulation. Single-line diagram showing the substation, line, transformer, feeder and load. line substation ###### feeder Yd5 (b) Voltage regulation: (a) Required substation supply voltage : load 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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