Question 13023 of 749 · Maryland Journeyperson Electrician Exam
A plant load of 100 kW operates at 0.80 power factor. About how much capacitor kVAR is needed to raise the power factor to 0.95?
Exactly one answer is correct.
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Correct answer to question 13023
- C: 42.1 kVAR
Explanation
At 0.80 PF the reactive power is 100 x tan(acos 0.80) = 75.0 kVAR; at 0.95 PF it is 100 x tan(acos 0.95) = 32.9 kVAR. The capacitors must supply the difference, 75.0 minus 32.9 = 42.1 kVAR.
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