Power quality conditioning

Faults on transmission lines that are translated to voltage sags in the LV distribution system	Weather conditions that heavily affect energy production, eg, on solar farms, where there can be voltage sags on cloudy days and voltage swell on sunny days	Starting a large motor in a factory, which can cause a voltage drop that affects the loads connected to the same bus	Arc welders and furnaces, which can cause rapid variations in current, leading to voltage fluctuations that affect lights and human health

Many types of electronic equipment are sensitive to voltage sags, including variable speed drive controls, motor starter contactors, robots, Programmable Logic Controllers (PLCs), controller power supplies and control relays.

Many of these equipments are used in applications that are critical to overall processes, leading to very expensive downtime when a voltage sags occurs.