10.9 A 2 MVA, 3.3 kV, 3-phase, star-connected Alternator delivers full-load at 0.8 pf lagging and at rated voltage. The effective resistance per phase is 0.15 2. The field circuit takes 68 A from 230 V DC supply. Mechanical and iron losses accounts for 16 kW and 34 kW respectively. Determine the efficiency of the Alternator at this load condition. [Ans: 92.98%]

10.9 A 2 MVA, 3.3 kV, 3-phase, star-connected Alternator delivers full-load at 0.8 pf lagging and at rated voltage. The effective resistance per phase is 0.15 2. The field circuit takes 68 A from 230 V DC supply. Mechanical and iron losses accounts for 16 kW and 34 kW respectively. Determine the efficiency of the Alternator at this load condition. [Ans: 92.98%]

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...

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