Question 191Electricity & Electronics - QMED

The correct answer is B) power factor will change in the leading direction. When the excitation of an alternator operating in parallel is decreased below normal, the power factor of that alternator will shift in the leading direction. This is because the decreased excitation results in a drop in the alternator's reactive power output, causing the overall power factor to become more leading. The other options are incorrect because the decreased excitation will not significantly increase the ampere load (A), greatly decrease the kilowatt load (C), or shift the power factor in the lagging direction (D).