Which statement best describes the effect of a low power factor on system performance?

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Multiple Choice

Which statement best describes the effect of a low power factor on system performance?

Low power factor means a load draws more current to deliver the same real power because more of the power is reactive. That increased current flows through conductors and equipment, which raises I^2R losses and heats up cables, transformers, and motors. It also causes larger voltage drops along lengths of wire, so devices may see lower voltage than intended and run less efficiently or misbehave. In addition, the extra current can push equipment toward its thermal and electrical limits and can lead to higher utility charges for poor power factor. So, the overall effect is a degradation of system performance, not just a single quantity like voltage or current. That’s why recognizing that a low power factor impacts the system as a whole is the correct way to look at it, and why improving PF with correction methods (like capacitor banks) is common practice.

Low power factor means a load draws more current to deliver the same real power because more of the power is reactive. That increased current flows through conductors and equipment, which raises I^2R losses and heats up cables, transformers, and motors. It also causes larger voltage drops along lengths of wire, so devices may see lower voltage than intended and run less efficiently or misbehave. In addition, the extra current can push equipment toward its thermal and electrical limits and can lead to higher utility charges for poor power factor.

So, the overall effect is a degradation of system performance, not just a single quantity like voltage or current. That’s why recognizing that a low power factor impacts the system as a whole is the correct way to look at it, and why improving PF with correction methods (like capacitor banks) is common practice.

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