Q3. A large industrial plant receives 3-phase electric power from the local utility. Thefollowing loads are being fed in the plant at 11.0 kV:1.2 +j 1.2 MVA2.0 MW at 0.8 (lag) power factor800 kW of pure heating and lighting (negligible reactive power) loadA number of induction motors: total power output of 3,000 HP, with acomposite efficiency of 0.85 and power factor of 0.88 (lag)(1) Analyse the total active power, reactive power and apparent power(ii) Compute the overall (composite) load power factor and the full load current(iii) Plan the capacitive VAR requirements for the capacitor bank if the overallplant power factor is to be improved to 0.95 lag(iv) Draw the simplified one-line diagram and the phasor diagram (powertriangle)

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Q3. A large industrial plant receives 3-phase electric power from the local utility. The following loads are being fed in the plant at 11.0 kV: 1.2 +j 1.2 MVA 2.0 MW at 0.8 (lag) power factor 800 kW of pure heating and lighting (negligible reactive power) load A number of induction motors: total power output of 3,000 HP, with a composite efficiency of 0.85 and power factor of 0.88 (lag) (i) Analyse the total active power, reactive power and apparent power (ii) Compute the overall (composite) load power factor and the full load current (iii) Plan the capacitive VAR requirements for the capacitor bank if the overall plant power factor is to be improved to 0.95 lag (iv) Draw the simplified one-line diagram and the phasor diagram (power triangle)

Q3. A large industrial plant receives 3-phase electric power from the local utility. The following loads are being fed in the plant at 11.0 kV: 1.2 +j 1.2 MVA 2.0 MW at 0.8 (lag) power factor 800 kW of pure heating and lighting (negligible reactive power) load A number of induction motors: total power output of 3,000 HP, with a composite efficiency of 0.85 and power factor of 0.88 (lag) (i) Analyse the total active power, reactive power and apparent power (ii) Compute the overall (composite) load power factor and the full load current (iii) Plan the capacitive VAR requirements for the capacitor bank if the overall plant power factor is to be improved to 0.95 lag (iv) Draw the simplified one-line diagram and the phasor diagram (power triangle)

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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