This analysis is intended solely to approximate the cost of downtime for various industries. Actual costs may vary.
Voltage sags have effects on a wide variety of equipment.
A voltage sag that extinguishes HID lighting is often mistaken as a longer outage by plant personnel. Some drives are designed to ride through voltage sags. The ride through time can be anywhere from 0.05 sec to 0.5 sec, obviously depending on the manufacturer and model. This is an important category of equipment for industrial processes because the entire process is often under the control of these devices. The sensitivity to voltage sags varies greatly but portions of an overall PLC system have been found to be very sensitive.