Electrical appliances use the 60 cycle Alternating Current provided by your power company to make modern life possible and comfortable. You don't see the electrons bouncing back and forth in your house wiring so it is easy to forget a basic problem with electrical power production, transmission and use. As large appliances like your A/C compressors and pool equipment use considerable power to start their motors turning under the system load. That momentary surge in current drags the 60 cycle sine wave out of sync with the production and transmission equipment and the motor quickly becomes very inefficient. Power Factor Correction Equipment keeps the motor in a more efficient synchronization with the power company and your use less power to run those appliances.
Active Power Factor Correction equipment will improved line voltages by dampening surges and spikes.
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