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Voltage may also fluctuate within a single phase. Depending on the loads, the phase can be measured within a range with a maximum, a minimum and an average voltage. Motors and equipment are designed to be most efficient at a set voltage and any minor fluctuations, up or down, will decrease the motor's efficiency and generate heat and electrical losses. Significant voltage fluctuations can cause equipment to shut down or fail.
Minor fluctuations are generally left uncorrected. If significant fluctuations occur, additional capacitor banks can be added and transformers tapped to higher voltages. However, traditional capacitor banks may actually magnify the fluctuations, increase resonance harmonics and destabilize voltage. Additionally, UPS boxes can be installed to protect critical equipment from low voltage sags.
can improve voltage within each phase, decrease fluctuations and allow motors to run more efficiently. Additionally, PowerKureTM
uses LRC tank circuits and zigzag reactors to capture and recycle losses as needed.