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# Generator manufacturers often use the term WR2, which is ## Problem 11.3 Chapter 11

Power System Analysis and Design | 5th Edition

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Problem 11.3

Generator manufacturers often use the term WR2, which is the weight in pounds of all the rotating parts of a generating unit (including the prime mover) multiplied by the square of the radius of gyration in feet. WR2/32.2 is then the total moment of inertia of the rotating parts in slug-fl2. (a) Determine a formula for the stored kinetic energy in ftlb of a generating unit in terms of WR2 and rotor angular velocity om. (b) Show that H _ 2:31 ? 104WR2 rpm_ 2 Srated per unit-seconds where Srated is the voltampere rating of the generator, and rpm is the synchronous speed in r/min. Note that 1 ft-lb _ 746=550 _ 1:356 joules. (c) Evaluate H for a threephase generating unit rated 800 MVA, 3600 r/min, with WR2 _ 4,000,000 lb-ft2.

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##### ISBN: 978-1111425777

This textbook survival guide was created for the textbook: Power System Analysis and Design, edition: 5. The full step-by-step solution to problem: 11.3 from chapter: 11 was answered by , our top Engineering and Tech solution expert on 09/04/17, 10:24PM. The answer to “Generator manufacturers often use the term WR2, which is the weight in pounds of all the rotating parts of a generating unit (including the prime mover) multiplied by the square of the radius of gyration in feet. WR2/32.2 is then the total moment of inertia of the rotating parts in slug-fl2. (a) Determine a formula for the stored kinetic energy in ftlb of a generating unit in terms of WR2 and rotor angular velocity om. (b) Show that H _ 2:31 ? 104WR2 rpm_ 2 Srated per unit-seconds where Srated is the voltampere rating of the generator, and rpm is the synchronous speed in r/min. Note that 1 ft-lb _ 746=550 _ 1:356 joules. (c) Evaluate H for a threephase generating unit rated 800 MVA, 3600 r/min, with WR2 _ 4,000,000 lb-ft2.” is broken down into a number of easy to follow steps, and 132 words. Since the solution to 11.3 from 11 chapter was answered, more than 240 students have viewed the full step-by-step answer. This full solution covers the following key subjects: unit, generating, rotating, rpm, srated. This expansive textbook survival guide covers 13 chapters, and 522 solutions. Power System Analysis and Design was written by and is associated to the ISBN: 978-1111425777.

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Generator manufacturers often use the term WR2, which is

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Get Full Access to Power System Analysis And Design - 5 Edition - Chapter 11 - Problem 11.3