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Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter15: Residential Air-conditioning Control Systems

Section: Chapter Questions

Problem 2RQ

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Concept explainers

Star Delta Conversion

Find the input resistance between points A and B of the following resistive network:

Question

A 72 kVA load operates at 0.63 lagging power factor when connected to a 230 V, 60Hz AC source. The power factor is to be improved to 0.90 lagging. The power factor is to be corrected by a synchronous motor with 0.50 leading power factor, what is the kVA rating of the synchronous motor?

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