Are voltage sags destroying equipment?

Industrial plants experience eight to 24 power quality disturbances every year. The most affected to such power disturbances is the plant's equipment and processes. Voltage sags due to lightning strikes, accidents, squirrels or equipment failure on the transmission and distribution grid feeding of the plant are the majority of these disturbances. Research and study have been conducted to discover some techniques for minimizing the potential for damage to typical industrial automation equipment as well as equipment specifications under short-duration voltage sags. A nationwide Web-based monitoring system provides access to power reliability and quality data from across the United States. The peak voltage and the peak current are possible causes of damage or equipment malfunction. Every asymmetrical fault that cause power disturbances shows up as a sag on a single-phase line and causes substantial inrush current to flow at end of sag. Commercially available voltage sag correctors allow equipment to ride through voltage sags. They clearly protect the equipment from the voltage sag recovery transient and eliminate the dangerous current surge. The most ideal solution is the characterization of the equipment behavior with short-duration sags and to be included to an overall design specification.