Question 99Electricity/Electronics - 1st Asst/Chief70% to pass
A turbo generator has a rated output of 1200 kW at 60 Hertz, with a no load frequency of 61.5 Hertz. What is its speed droop?
AI Explanation
The correct answer is C) 2.439%.
To calculate the speed droop, we use the formula: Speed Droop (%) = (No Load Frequency - Rated Frequency) / Rated Frequency x 100
In this case, the no load frequency is 61.5 Hz and the rated frequency is 60 Hz. Plugging these values into the formula, we get:
Speed Droop (%) = (61.5 - 60) / 60 x 100 = 2.439%
The other options are incorrect because:
A) 1.025% is too low
B) 1.500% is too low
D) 2.500% is slightly higher than the correct value of 2.439%
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