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A three-phase circuit breaker has a 15.5-kV rated maximum

Power System Analysis and Design | 5th Edition | ISBN: 9781133172871 | Authors: J. Duncan Glover

Problem 7.31 Chapter 7

Power System Analysis and Design | 5th Edition

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Power System Analysis and Design | 5th Edition | ISBN: 9781133172871 | Authors: J. Duncan Glover

Power System Analysis and Design | 5th Edition

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Problem 7.31

A three-phase circuit breaker has a 15.5-kV rated maximum voltage, 9.0-kA rated short-circuit current, and a 2.67-rated voltage range factor. (a) Determine the symmetrical interrupting capability at 10-kV and 5-kV operating voltages. (b) Can this breaker be safely installed at a three-phase bus where the symmetrical fault current is 10 kA, the operating voltage is 13.8 kV, and the (X/R) ratio is 12?

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Chapter 7, Problem 7.31 is Solved
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Textbook: Power System Analysis and Design
Edition: 5
Author: J. Duncan Glover
ISBN: 9781133172871

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