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# The diagram shown in P 12.7-7 has two threephase loads that form part of a manufacturing ISBN: 9781118477502 422

## Solution for problem P12.7-7 Chapter 12.7

Introduction to Electric Circuits | 9th Edition

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Problem P12.7-7

The diagram shown in P 12.7-7 has two threephase loads that form part of a manufacturing plant. They are connected in parallel and require 4.16 kV rms. Load 1 is 1.5 MVA, 0.75 lag pf D connected. Load 2 is 2 MW, 0.8 lagging 0.4 j0.8 0.4 j0.8 Load 2 j0.8 Load 1 0.4 Three-phase supply from utility Figure P 12.7-7 A three-phase circuit with a D load and a Y load.pf, Y connected. The feeder from the power utilitys substation transformer has an impedance of 0:4 j0:8 V/phase. Determine the following: (a) The required magnitude of the line voltage at the supply. (b) The real power drawn from the supply. (c) The percentage of the real power drawn from the supply that is consumed by the loads.

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##### ISBN: 9781118477502

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