A load in a factory consists of the following i. 9kW of lighting at unity power factor ii. A 12kVa motor at 0.75 p.f. lagging iii. A number of small motors taking 15kW at 0.6 p.f. lagging. The loads are balanced over the three phases of a 414V supply system. Determine A. The total kW B. The total kVar C. The overall kVa D. The overall power factor E. The line current. F. Draw the final power triangle of the combined load

A load in a factory consists of the following i. 9kW of lighting at unity power factor ii. A 12kVa motor at 0.75 p.f. lagging iii. A number of small motors taking 15kW at 0.6 p.f. lagging. The loads are balanced over the three phases of a 414V supply system. Determine A. The total kW B. The total kVar C. The overall kVa D. The overall power factor E. The line current. F. Draw the final power triangle of the combined load

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.7P

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