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

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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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

 

 

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