If a synchronous-type motor is operated at 90 percent power factor, the rated full-load current in the table is to be ____.
A) decreased by 90%
B) decreased by 10%
C) increased by 10%
D) increased by 90%

Question

Quizplus · Accepted Answer

When a synchronous motor operates at a power factor less than unity, the current increases to maintain the same power output. Therefore, if the power factor is 90%, the full-load current must be increased by 10% to compensate for the lower power factor.

If a Synchronous-Type Motor Is Operated at 90 Percent Power