Q7. Choose the letter of correct answer 7(i) The maximum efficiency of a synchronous generator is 95%. Determine the mechanical losses of the machine if a 10kW full load is connected? a. 365W b. 263W 100W C. d. 50W 7(ii)A 2kW, 250V, 60Hz, three phase synchronous generator has 0.50 synchronous reactance and a negligible resistance. Determine the mechanical losses including core losses if the efficiency is 90%? a. 211W b. 222W C. 233W d. 244W
Q7. Choose the letter of correct answer 7(i) The maximum efficiency of a synchronous generator is 95%. Determine the mechanical losses of the machine if a 10kW full load is connected? a. 365W b. 263W 100W C. d. 50W 7(ii)A 2kW, 250V, 60Hz, three phase synchronous generator has 0.50 synchronous reactance and a negligible resistance. Determine the mechanical losses including core losses if the efficiency is 90%? a. 211W b. 222W C. 233W d. 244W
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
Chapter7: Symmetrical Faults
Section: Chapter Questions
Problem 7.3MCQ: The amplitude of the sinusoidal symmetrical ac component of the three-phase short-circuit current of...
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Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
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