What is power factor correction and when is it typically used?

What is power factor correction and when is it typically used?

• A. Reducing reactive power to improve efficiency; commonly used on large inductive loads to free up capacity.
• B. Increasing reactive power
• C. Reducing voltage
• D. Increasing frequency

Answer: (A)

Power factor correction is about reducing reactive power to improve efficiency and free up capacity in electrical equipment. Inductive loads like motors and transformers cause the current to lag behind the voltage, which creates reactive power that doesn’t do useful work and lowers the power factor. By adding capacitive reactance at the load or near the source, you supply some of that reactive power locally, so the overall current needed for the same real power decreases. That reduces I²R losses, lowers voltage drop on feeders, and frees up capacity on transformers and switches. It’s commonly used on systems with large inductive loads to keep equipment running more efficiently and to avoid charging penalties for low power factor. This approach doesn’t involve increasing reactive power, changing voltage, or altering frequency.

Power factor correction is about reducing reactive power to improve efficiency and free up capacity in electrical equipment. Inductive loads like motors and transformers cause the current to lag behind the voltage, which creates reactive power that doesn’t do useful work and lowers the power factor. By adding capacitive reactance at the load or near the source, you supply some of that reactive power locally, so the overall current needed for the same real power decreases. That reduces I²R losses, lowers voltage drop on feeders, and frees up capacity on transformers and switches. It’s commonly used on systems with large inductive loads to keep equipment running more efficiently and to avoid charging penalties for low power factor. This approach doesn’t involve increasing reactive power, changing voltage, or altering frequency.