Power Factor Management

Motors are the reason most industrial sites have a power factor problem. An induction motor magnetises its iron through reactive power, and it draws that magnetising current almost regardless of load: a motor loafing at a quarter of its rating still magnetises like it means it, so its power factor collapses even as its useful work dwindles. Since motors dominate site load, motor practice largely is power factor practice, and this lesson covers the motor-specific half of a story the electrical science course began.